Condition Responsive Fluid Control Patents (Class 417/270)
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Patent number: 4838766Abstract: A method for controlling the compressor displacement of a variable displacement wobble plate type compressor having a solenoid-operated control valve unit for controlling the pressure level of a crankcase chamber of the compressor by controlling the duty ratio of an electric pulsive current to energize the solenoid-operated control valve unit, the frequency of the electric pulsive current being set and maintained at a low frequency, such as a frequency equal to or less than 1.0 Hz.Type: GrantFiled: December 3, 1987Date of Patent: June 13, 1989Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Kazuya Kimura, Akira Nakamoto, Jun Hasegawa
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Patent number: 4801251Abstract: A sliding-vane rotary compressor includes a recess defined in a cylinder and to which a discharge hole is open, a cover secured to the cylinder to close the recess, a discharge valve disposed in a valve receiving chamber defined between the cover and the cylinder, and a discharge connecting hole extending in the cylinder and a side block for connecting the interior space of the recess and a high pressure chamber. The compressor thus constructed is simple in size and light in weight due to non-inclusion of a shell which is required in the conventional compressor. Preferably, a displacement adjustment mechanism is incorporated in the compressor for adjusting the displacement of the latter.Type: GrantFiled: September 23, 1987Date of Patent: January 31, 1989Assignee: Diesel Kiki Co., Ltd.Inventors: Nobuyuki Nakajima, Kenichi Inomata, Shigeru Okada
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Patent number: 4781538Abstract: A rotation detecting device for a wobble plate type compressor comprises a front thrust race disposed on a flat end surface of a cam rotor and moveable therein. The front thrust race has two nail portions. A magnetic pickup is mounted on the cylindrical housing of the compressor and is positioned thereon opposite a portion of the locus of movement of the nail portions. When a nail portion passes opposite the magnetic pickup, a magnetic flux is produced. The magnetic pickup detects the magnetic flux and thus detects movement of wobble plate. Thus, the connection between the compressor and the driving source can be quickly interrupted in the event of compressor malfunction.Type: GrantFiled: September 4, 1987Date of Patent: November 1, 1988Assignee: Sanden CorporationInventor: Tamotsu Daikohara
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Patent number: 4780059Abstract: This invention is directed to a slant plate type compressor, such as a wobble plate type compressor, which is provided with a variable displacement mechanism. The variable displacement mechanism controls the incline angle of the wobble plate due to changes in crank chamber pressure. The variable displacement mechanism comprises a passageway communicating between the suction chamber and the crank chamber, and a valve mechanism to control the opening and closing of the passageway. The valve mechanism includes a first valve control mechanism for directly controlling the opening and closing of passageway and a second valve control mechanism which operates to override the first valve mechanism and open the passageway to operate the compressor at high capacity.Type: GrantFiled: July 21, 1987Date of Patent: October 25, 1988Assignee: Sanden CorporationInventor: Yokihiko Taguchi
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Patent number: 4780060Abstract: A slant plate type refrigerant compressor, such as a wobble plate type compressor, with a variable displacement mechanism for use in a refrigeration circuit is disclosed. The compressor has a control mechanism to control the pressure in a crank chamber responsive to the pressure in the suction chamber, and another control mechanism to control the pressure in the crank chamber responsive to the temperature of refrigerant gas in the suction chamber. Therefore, the capacity of the compressor can be more accurately controlled in response to changes in the air conditioning load, such as the temperature in a passenger compartment of an automobile.Type: GrantFiled: August 7, 1987Date of Patent: October 25, 1988Assignee: Sanden CorporationInventor: Kiyoshi Terauchi
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Patent number: 4778348Abstract: A slant plate type compressor, such as a wobble plate type compressor, with a variable displacement mechanism for use in a refrigeration circuit is disclosed. Two passageways communicate between the crank chamber and the suction chamber in the cylinder block. A bellows is disposed in a first passageway and controls communication between the crank chamber and the suction chamber in the first passageway. The bellows operates in accordance with the crank chamber pressure. A control valve is disposed in the second passageway and controls communication between the crank chamber and the suction chamber in the second passageway in response to signal from an external sensor. This configuration enables the compressor to be operated at maximum capacity when the refrigeration circuit is turned on until the temperature in the passenger compartment of a car reaches a desired temperature without input from the pressure in the crank chamber.Type: GrantFiled: July 22, 1987Date of Patent: October 18, 1988Assignee: Sanden CorporationInventors: Sei Kikuchi, Takai Kazuhiko, Higuchi Teruo, Kiyoshi Terauchi
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Patent number: 4752189Abstract: A valve arrangement for a variable displacement refrigerant compressor comprising one or more valve assemblies adapted to regulate fluid communication between the compressor's discharge cavity and the interior of the crankcase as a function of a predetermined fluid pressure differential. The valve assemblies operate to modulate, as a function of the ambient temperature, the set point of the compressor thereby avoiding evaporator freeze up.Type: GrantFiled: December 9, 1986Date of Patent: June 21, 1988Assignee: Diesel Kiki Co., Ltd.Inventors: David E. Bearint, John S. Lee
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Patent number: 4747753Abstract: An improved variable displacement mechanism for a slant plate type compressor, such as a wobble plate type compressor, which increases the cooling efficiency of the compressor is disclosed. The variable displacement mechanism includes a passageway to allow communication between the suction chamber and the crank chamber, and a valve control mechanism for controlling the opening and closing of the passageway. The valve control mechanism includes a first valve control device with a first valve element which opens and closes a hole linking the suction chamber and the crank chamber. The first valve control device acts in accordance with the pressure within its interior space. The valve control mechanism also includes a second valve control device which controls the interior pressure of the first valve control device. The second valve control device is responsive to the actual operating conditions of the compressor.Type: GrantFiled: August 10, 1987Date of Patent: May 31, 1988Assignee: Sanden CorporationInventor: Yukihiko Taguchi
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Patent number: 4747754Abstract: A variable wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for a refrigerant before compression, a discharge chamber for a compressed refrigerant, compressing cylinder bores, pistons reciprocated by the wobble plate within the cylinder bores for compressing the refrigerant, a crankcase having a chamber to receive therein a drive and a wobble plate mechanism, connected to the pistons to cause the reciprocating motion of the pistons and capable of changing the wobble angle thereof, a first passageway closably opened so as to apply a high discharge gas pressure of the discharge chamber to the drive and wobble plate mechanism within the crankcase chamber, a solenoid valve for closing and opening the first passageway in response to a change in a cooling load, and a second passageway providing a fluid communication between the crankcase chamber and the suction chamber, a spool valve urged by a spring toward a first position opening the second passageway thereby pType: GrantFiled: September 4, 1987Date of Patent: May 31, 1988Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Toshiro Fujii, Akira Nakamoto, Shinichi Suzuki
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Patent number: 4732544Abstract: A variable capacity wobble plate compressor in which pressure in a crankcase accomodating a wobble plate is controlled by a pressure-control valve disposed across a communication passage connecting the crankcase and a suction chamber, whereby the delivery quantity or capacity is varied with a change in the inclination angle of the wobble plate depending on the pressure in the crankcase. The pressure-control valve comprises bellows variable in length with a change in the magnituted of suction pressure, a valve body attached to one end of the bellows, a first movable member attached to the other end of the bellows, a first spring urging the valve body in the closing direction, a second movable member which is brought into or out of urging contact with the first movable member in response to at least a change in the discharge pressure, and a second spring interposed between the second movable member and a spring seat.Type: GrantFiled: June 4, 1987Date of Patent: March 22, 1988Assignees: Diesel Kiki Co., Ltd., Fujikoki Manufacturing Co., Ltd.Inventors: Juetsu Kurosawa, Takeo Iijima, Hiroshi Nomura, Takashi Koike
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Patent number: 4730986Abstract: A variable displacement wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for refrigerant before compression, a discharge chamber for refrigerant after compression, suction, and compression, and discharge cylinder bores, pistons reciprocated by the wobble plate within the cylinder bores for compressing the refrigerant, a crankcase with a crank chamber to receive therein a drive and a wobble plate mechanism mounted about a drive shaft connectable to a rotary drive source, i.e.Type: GrantFiled: April 20, 1987Date of Patent: March 15, 1988Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Hiroaki Kayukawa, Masaki Ohta, Shinichi Suzuki, Kenji Takenaka
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Patent number: 4730987Abstract: A variable delivery compressor containing a plurality of compression chambers and reciprocatory compression pistons is adapted for use in an air-conditioning circuit of a vehicle. The compressor has a suction chamber communicating with the compression chambers by way of a plurality of suction valves, some of which are capable of being deformed by a valve pressing mechanism from a first position, where the refrigerant is compressed, to a second position where the compression of the refrigerant is partially ineffective. The valve pressing mechanism contains an axially movable spool actuated by an actuating unit controlled by a cooling-load responsive control unit.Type: GrantFiled: September 24, 1986Date of Patent: March 15, 1988Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Katsunori Kawai, Hiroyuki Deguchi, Hisao Kobayashi, Shuichi Sugizono
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Patent number: 4729718Abstract: The inclination angle of the wobble plate in a wobble plate type compressor is changed to obtain a discharge capacity in accordance with a cooling load. A spring is provided to adjust the inclination angle of the wobble plate in cooperation with the pressure force acting upon the pistons connected to the wobble plate, and thus the pressure in the suction chamber corresponding to the temperature of the exhausted air is kept at a constant level. That is, the temperature of the exhausted air is kept at a constant level suitable for maintaining a desired cooling condition in a vehicle.Type: GrantFiled: September 24, 1986Date of Patent: March 8, 1988Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Masaki Ohta, Shinichi Suzuki, Akihiko Hyodo, Kenji Takenaka
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Patent number: 4729719Abstract: A variable displacement wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for refrigerant returning from a refrigerating circuit via an evaporator, a discharge chamber for refrigerant after compression, suction and compression cylinder bores formed in a cylinder block, pistons reciprocating in the cylinder bores, a crankcase attached to the end of the cylinder block and receiving therein a drive and a wobble plate mechanism mounted about a drive shaft connectable to a rotary drive source, connected to the pistons to cause reciprocating motion of the pistons and capable of changing the wobble angle thereof and thereby change the strokes of the pistons, a first passageway for communicating the crankcase interior chamber with a discharge chamber to supply pressure acting as a back-pressure applied to the pistons, a control valve unit for closing and opening the first passageway, a second passageway extending through the drive shaft for communicating the crankcasType: GrantFiled: July 27, 1987Date of Patent: March 8, 1988Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Hiroaki Kayukawa, Masaki Ohta, Akihiko Hyodo, Kenji Takenaka
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Patent number: 4723891Abstract: A variable displacement wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for refrigerant before compression, a discharge chamber for a compressed refrigerant, suction and compression cylinder bores, pistons reciprocated by the wobble plate within the cylinder bores for compressing the refrigerant, a crankcase with a chamber to receive therein a drive, and a wobble plate mechanism mounted about a drive shaft connectable to a rotary drive source, i.e.Type: GrantFiled: April 8, 1987Date of Patent: February 9, 1988Assignee: Toyoda Jidoshokki Seisakusho Kabushiki KaishaInventors: Kenji Takenaka, Shinichi Suzuki, Hiroaki Kayukawa, Masaki Ohta
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Patent number: 4702677Abstract: A variable displacement wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for a refrigerant before compression, a discharge chamber for a compressed refrigerant, suction and compression discharge cylinder bores, pistons reciprocated by the wobble plate within the cylinder bores for compressing the refrigerant, a crankcase with a crank chamber to receive therein a drive and a wobble plate mechanism mounted about a drive shaft connectable to a rotary drive source, i.e.Type: GrantFiled: February 26, 1987Date of Patent: October 27, 1987Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Kenji Takenaka, Shinichi Suzuki, Hiroaki Kayukawa, Masaki Ohta
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Patent number: 4688997Abstract: A variable displacement compressor with a variable angle non-rotary wobble plate, having a suction chamber for refrigerant before compression, a discharge chamber for refrigerant after compression, suction and compression cylinders, pistons reciprocating in the cylinders, a crankcase receiving therein a wobble plate mechanism connected to pistons to cause reciprocating motion of the pistons and capable of changing the wobble angle thereof, a first passage for communicating the crankcase interior with the discharge chamber, a shutoff valve unit for closing and opening the first passage, a second passage for communicating the crankcase interior with the suction chamber to extract the refrigerant from the crankcase interior into the suction chamber, and a valve control unit for controlling the operation of the shutoff valve unit in response to a change in a fluid pressure in the crankcase interior with respect to a predetermined pressure level thereby controlling the wobble angle of the wobble plate mechanism.Type: GrantFiled: March 14, 1986Date of Patent: August 25, 1987Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Shinichi Suzuki, Kenji Takenaka, Masaki Ohta
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Patent number: 4687419Abstract: A variable displacement compressor with a variable angle non-rotary wobble plate, having a control valve assembly which includes a pressure detecting unit for detecting a change in a pressure in the compressor crankcase and a single valve mechanism arranged in a communication passageway between the crankcase and the compressor suction chamber and able to control communication between the crankcase and the suction chamber in association with a pressure changing signal from the pressure detecting unit so that the pressure in the crankcase is maintained at a predetermined pressure value.Type: GrantFiled: December 23, 1985Date of Patent: August 18, 1987Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Shigeru Suzuki, Masaki Ohta, Kenji Takenaka
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Patent number: 4685866Abstract: A variable displacement wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for refrigerant before compression, a discharge chamber for refrigerant after compression, suction and discharge cylinder bores, pistons reciprocating in the cylinder bores, a crankcase receiving therein a drive and a wobble plate mechanism mounted about a drive shaft connectable to a rotary drive source, i.e.Type: GrantFiled: April 28, 1986Date of Patent: August 11, 1987Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Kenji Takenaka, Masaki Ohta, Hiroaki Kayukawa
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Patent number: 4681514Abstract: A pump comprising a housing and two end covers receiving a drive shaft with an eccentric thereon and with a plurality of radial pistons displaceable in radial bores provided in the housing and biased by springs. An inlet passage and an outlet passage are provided in each bore receiving the radial piston. A sealing disc is inserted between the housing and one of the end covers. Sealed through openings for high pressure medium are provided in the sealing disc. The maximal feeding flow of the pressure medium is limited by throttled passages provided in the sealing disc. A pressure control valve is provided, which is connected to an inner chamber of the housing, accommodating the eccentric.Type: GrantFiled: February 18, 1986Date of Patent: July 21, 1987Assignee: Robert Bosch GmbHInventors: Klaus Griese, Siegfried Mayer, Dieter Weigle
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Patent number: 4674957Abstract: A variable displacement swash plate type compressor having a cylinder block in which a drive shaft is centrally and axially extended so as to mount thereon a swash plate assembly to drive pistons reciprocally arranged in a plurality of cylinder bores arranged circumferentially about the drive shaft. The swash plate assembly has a rotary swash plate and a non-rotary wobble plate in a crankcase formed in the cylinder block and a mechanism for changing the wobble angle of the swash plate and the wobble plate by turning them about an axis extending at a right angle to the rotating axis of the drive shaft and passing through points which come into registration with respective centers of connection of connecting rods of the pistons and the wobble plate when the pistons are at the top dead center of their strokes within the cylinder bores.Type: GrantFiled: December 18, 1985Date of Patent: June 23, 1987Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Masaki Ohta, Shinichi Suzuki, Kenji Takenaka
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Patent number: 4669272Abstract: A variable displacement refrigerant compressor of the variable angle wobble or swash plate type is disclosed. The compressor according to the invention has a displacement control valve which is operable in response to the evaporator pressure so as to restrict the drop thereof by throttling the refrigerant gas flowing through a control port disposed between the evaporator and suction chamber. Crankcase of the compressor is arranged for direct communication with the evaporator so as to keep the crankcase under a pressure which is substantially the same as the evaporator pressure.Type: GrantFiled: June 17, 1986Date of Patent: June 2, 1987Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Katsunori Kawai, Hiroyuki Deguchi, Hisao Kobayashi, Shuichi Sugizono
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Patent number: 4664604Abstract: A slant plate type compressor with capacity adjusting mechanism is disclosed. The compressor housing has a cylinder block provided with a plurality of cylinders and a piston slides within each cylinder. The piston is reciprocated by a swash plate driven by a drive shaft through a hinge coupling mechanism which includes a mechanism for changing the slant angle of the swash plate. The swash plate is supported for nutational (wobbling) and rotational motion on the drive shaft through a spherical bush and is operatively connected to the pistons through bearing shoes. Accordingly, each piston accomplishes reciprocating movement within a cylinder by the rotation of the swash plate and the stroke of piston is changed by the hinge coupling mechanism due to a pressure difference between the crank chamber and the suction chamber.Type: GrantFiled: February 21, 1985Date of Patent: May 12, 1987Assignee: Sanden CorporationInventor: Kiyoshi Terauchi
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Patent number: 4636146Abstract: An axial plunger pump for high pressure purposes using three plungers in a star like arrangement around an axis of a wobble plate. Each plunger has associated therewith a pumping unit and all pumping units are located in a common pumping unit block and each of the pumping units comprising a pump chamber having inlet and outlet valves connected to a common inlet duct and outlet duct respectively. Plunger cylinders of at least one of the plungers are connected to pump chamber at a position between the inlet valve and the outlet valve while the plunger cylinder of at least another plunger is connected to the associated pump chamber at a position below the inlet valve.Type: GrantFiled: June 4, 1985Date of Patent: January 13, 1987Inventors: Josef Kranzle, Lutz Droitsch, Manfred Bauer
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Patent number: 4629400Abstract: A hydraulic pump comprising at least a reciprocating piston, each piston being associated with one suction valve returned to its closing position by a return spring. The return spring is associated on the one hand with the valve and on the other hand with a push-piece cyclically actuated by a cam driven by the pump driving shaft in such manner that the action of the spring on the suction valve is cancelled during the suction phase and reestablished at the end of the suction phase.Type: GrantFiled: November 29, 1984Date of Patent: December 16, 1986Assignee: Hydro Rene LeducInventor: Louis-Claude Porel
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Patent number: 4621983Abstract: A variable capacity wobble plate compressor in which a pressure regulating valve is arranged across a communication passageway communicating between a high pressure chamber and a crankcase, wherein the crankcase pressure is controlled through selective closing and opening of said pressure regulating valve, to thereby vary the capacity of the compressor. An oil guide passage means communicates between a lower portion of the high pressure chamber and an inlet port of the pressure regulating valve. When the pressure regulating valve is open, lubricating oil which has collected in the high pressure chamber is returned to the crankcase through the oil guide passage means, the open pressure regulating valve, and part of the communication passageway.Type: GrantFiled: April 12, 1985Date of Patent: November 11, 1986Assignee: Diesel Kiki Co., Ltd.Inventors: David L. Thomas, Nobuhiko Suzuki
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Patent number: 4614481Abstract: A pump of the diaphragm type. The pump has a replaceable unitary cartridge which fits into a cavity of the pump casing. The casing is in two parts, an upper casing and a lower casing, which are held together by detachable means for replacing the cartridge.Type: GrantFiled: June 10, 1985Date of Patent: September 30, 1986Inventor: John A. Vanderjagt
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Patent number: 4606705Abstract: There is disclosed in a refrigerant compressor whose piston stroke and thereby displacement is controlled by crankcase-suction pressure differential, a control valve that is normally responsive to at least suction pressure to control such differential but is acted on by a solenoid above a prescribed compressor speed to increase the crankcase pressure to discharge pressure to effect minimum piston stroke and thereby minimum displacement to prolong compressor life.Type: GrantFiled: August 2, 1985Date of Patent: August 19, 1986Assignee: General Motors CorporationInventor: Dinesh V. Parekh
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Patent number: 4605359Abstract: A radial plunger pump is provided for supplying pressurized working fluid to any of a plurality of systems using a simple construction in which the pump housing is provided with a plurality of outlets and a switching device for switchingly supplying pressurized working fluid to the respective systems without a requirement for a pressurized reservoir for the pump.Type: GrantFiled: February 28, 1985Date of Patent: August 12, 1986Assignee: Nippondenso Co., Ltd.Inventors: Masahiko Suzuki, Masatoshi Koroyanagi, Kouichi Moriguchi, Kazuma Matsui
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Patent number: 4596518Abstract: A partition separates a suction passageway axially extending in the compressor main body from a swash plate chamber, and is constructed with a mechanism to introduce a refrigerant medium into the swash plate chamber and toward the swash plate, from a portion of the suction passageway radially outward of the swash plate substantially at a predetermined angle relative to the axis of the drive shaft. Preferably, the compressor includes a delivery control mechanism responsive to pressure in the suction passageway to vary the effective cross-sectional area of the suction passageway.Type: GrantFiled: January 28, 1985Date of Patent: June 24, 1986Assignee: Diesel Kiki Co., Ltd.Inventor: Seiji Sumikawa
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Patent number: 4586874Abstract: A reciprocating piston type refrigerant compressor includes a compressor housing having a cylinder block provided with a plurality of cylinders and a crank chamber adjacent the cylinder block. A piston slides within each cylinder and is reciprocated by a wobble plate driven by a cam rotor mounted on a drive shaft. The cam rotor includes an adjustable slant plate with a sloping surface at an adjustable slant angle in close proximity to the wobble plate. Accordingly, the stroke of the pistons within the cylinders can be changed by adjusting the slant angle of the sloping surface. The slant angle of the sloping surface is adjusted in response to the change of pressure in the crank chamber. The crank chamber communicates with the suction chamber through a passageway and a valve control mechanism controls the opening and closing of the passageway.Type: GrantFiled: December 21, 1984Date of Patent: May 6, 1986Assignee: Sanden CorporationInventors: Masaharu Hiraga, Tamotsu Daikohara
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Patent number: 4576554Abstract: The invention relates to a swash plate axial piston pump having several pistons, the piston heads of which are held in contact with the swash plate by means of a retraction plate, and having a central pressure-regulating valve which is forced against a valve spring by the pressure in the pressure chamber. The object is to provide a way of fixing the retraction plate on the swash plate which is simple and cheap to construct and install.This is achieved by arranging and fixing the valve spring between the valve body and the retraction plate.Type: GrantFiled: November 7, 1984Date of Patent: March 18, 1986Assignee: Hydromatik GmbHInventors: Ludwig Wagenseil, Manfred Lotter
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Patent number: 4573878Abstract: A variable-delivery compressor of a swashplate type having compression chambers wherein compression is effected by reciprocating movements of double-headed pistons slidably engaging a rotating swashplate in a cylinder block. The cylinder block defines compression chambers in cooperation with front and rear valve plates which have discharge ports communicating with front and rear discharge chambers one of which serves as delivery-adjusting discharge chamber. Delivery-adjusting discharge valves are disposed in the delivery-adjusting discharge chamber and carried by an actuator member which is movable between operative and inoperative positions at which the delivery-adjusting valves are operative and inoperative to close and open the discharge ports in the corresponding valve plate. The corresponding valve plate comprises a portion defining a recess opposite to each delivery-adjusting discharge valve.Type: GrantFiled: June 14, 1984Date of Patent: March 4, 1986Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Makoto Ohno, Hisao Kobayashi, Kimio Kato
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Patent number: 4553905Abstract: A wobble plate compressor which is adapted to vary the angularity of the wobble plate during rotation in response to the difference between the resultant reaction force exerted by the pistons on their compression and suction strokes and the pressure in the crankcase. The wobble plate is supported by a first fulcrum movable along the drive shaft around which it is disposed, at a diametrically central location, and by a second fulcrum at a location radially spaced from the drive shaft. The second fulcrum is formed by an end of an arm member disposed for rotation together with the drive shaft.Type: GrantFiled: May 9, 1984Date of Patent: November 19, 1985Assignee: Diesel Kiki Co., Ltd.Inventors: James C. Swain, David L. Thomas
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Patent number: 4549855Abstract: A swash plate compressor is disclosed which is provided with a compression capacity control apparatus capable of returning an output pressure of a high pressure chamber of one cover to a low pressure chamber of the same cover. The control apparatus comprises a delivery chamber which is communicated with a high pressure chamber of the other cover, isolated from the high pressure chamber of the one cover and connected to a delivery conduit. The control apparatus also comprises a compression capacity control passageway providing communication between the delivery chamber and the low pressure and high pressure chambers of the one cover. A rotary three-way valve member is disposed in the control passageway to interrupt the communication between the delivery chamber and the high pressure chamber of the one cover while establishing communication between the low pressure and high pressure chambers of the one cover.Type: GrantFiled: February 5, 1985Date of Patent: October 29, 1985Assignee: Diesel Kiki Company, Ltd.Inventors: Yutaka Ishizuka, Tsunenori Shibuya
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Patent number: 4547133Abstract: A variable capacity compressor has a low-pressure chamber, a high-pressure chamber receiving the discharge of some cylinders and a discharge chamber receiving the discharge of other cylinders. An on-off valve between the discharge chamber and low-pressure chamber is actuated by an electric device, such as a servo motor. An electric circuit controls the servo motor so that it is driven for a certain time period in response to a signal to change the compressor capacity. A device operative with the on-off valve moves the valve forward or backward according to the rotation of the servo motor and makes the motor idle when it reaches the fore or back end of movable space.Type: GrantFiled: March 3, 1983Date of Patent: October 15, 1985Assignee: Nippondenso Co., Ltd.Inventors: Kazutoshi Nishizawa, Masashi Takagi, Yasuyuki Nishi
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Patent number: 4543043Abstract: An axial piston, variable displacement, wobble plate gas or vapor compressor having improved wobble plate control for rapid response to a compressor inoperative mode. Either a mechanical or spring means serves to maintain the reference position during inoperation of the compressor. This control of the wobble plate position provides for rapid response during either operation or inoperation of the compressor, and also provides a stabilizing means which inhibits undesired wobble plate movement at low crankcase pressures.Type: GrantFiled: May 24, 1984Date of Patent: September 24, 1985Assignee: Borg-Warner CorporationInventor: Richard W. Roberts
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Patent number: 4541391Abstract: Fuel injection apparatuses are used to inject fuel into the combustion chambers of compression ignition engines. The known mechanical drive arrangements for driving the distributor rotor and controlling beginning moment of fuel injection are complex, bulky and expensive to manufacture. The subject timing control for fuel injection apparatus includes a planetary gear arrangement driven by a pumping section and drivingly connected to a distributor rotor. A ring gear controls the timing phase relationship between the rotor and a delivery passage communicating the pumping section with the rotor. A riser of a flyweight assembly is mechanically connected to the ring gear so that the ring gear is positioned in accordance with the engine speed. The planetary gear arrangement is of simple construction requiring a minimum of space and is relatively inexpensive to manufacture.Type: GrantFiled: March 27, 1984Date of Patent: September 17, 1985Assignee: Caterpillar Tractor Co.Inventor: Dennis H. Gibson
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Patent number: 4533299Abstract: A wobble plate compressor which is adapted to vary the angularity of the wobble plate during rotation in response to the difference between the resultant reaction force exerted by the pistons on their compression and suction strokes and the pressure in the crankcase. The compressor has a passage with an orifice communicating a lower pressure space therein with the interior of the crankcase, a communication passage communicating a higher pressure space therein with the interior of the crankcase, and a control valve means for controlling the opening of the communication passage. Preferably, the cross-sectional area of the above orifice passage is set at such a value as to permit blow-by gas leaking from the cylinders into the crankcase to escape from the crankcase into the lower pressure space at a flow rate at least equal to the maximum possible flow rate at which the blow-by gas leaks from the cylinders into the crankcase.Type: GrantFiled: May 9, 1984Date of Patent: August 6, 1985Assignee: Diesel Kiki Co., Ltd.Inventors: James C. Swain, David L. Thomas
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Patent number: 4526516Abstract: A wobble plate compressor, which is adapted to vary the angularity of the wobble plate in response to the difference between the resultant reaction force exerted by the pistons on their compression strokes and the pressure in the crankcase, includes elastic means permanently biasing the wobble plate in the angularity-decreasing direction, and control valve means responsive to a signal indicative of at least one predetermined parameter to selectively connect the crankcase with a suction pressure space and a discharge pressure space for a rapid change in the pressure in the crankcase to thereby achieve control of the angularity of the wobble plate with high responsiveness.Type: GrantFiled: February 17, 1983Date of Patent: July 2, 1985Assignee: Diesel Kiki Co., Ltd.Inventors: James C. Swain, Jan B. Yates
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Patent number: 4522567Abstract: A swash plate compressor especially suited for automotive vehicles. The inner housing may be moved in the rear housing in the front and rear direction, as the occasion may demand, for adjusting the compression capacity or performance of the compressor. A partition wall is projectingly projected at the front side of the inner housing for defining an inner or discharge chamber and an outer or suction chamber. A plurality of clamp bolts for fixedly clamping together a rear cylinder block and the rear housing are passed through said suction chamber. The rear wall of the inner housing is formed with an annular thin-walled portion lesser in thickness than the valve plate on the front surface of said inner housing. By the function of said thin-walled portion, the inner housing may be flexed readily to absorb valve plate strain.Type: GrantFiled: October 13, 1983Date of Patent: June 11, 1985Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Kimio Kato, Hisao Kobayashi, Takamitsu Mukai, Hiroya Kono, Taku Yamamoto
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Patent number: 4519752Abstract: A control system for varying the volume of fluid discharged from a variable displacement hydraulic pump having a plurality of reciprocating pistons. Each piston includes an inlet check valve which controls the flow of fluid from an inlet supply line to the piston chamber, and an outlet check valve which controls the flow of fluid from the piston chamber to a discharge line. The displacement of the pump is controlled by a series of actuator members which regulate the working pressure developed by each piston by controlling the positions of the inlet check valves. Each actuator member is movable between a first position wherein it permits an inlet check valve to close and enable its corresponding piston to develop working pressure in the piston chamber, and a second position wherein it opens the inlet check valve to prevent the development of working pressure in the piston chamber.Type: GrantFiled: June 27, 1984Date of Patent: May 28, 1985Assignee: Applied Power Inc.Inventor: Ingo Valentin
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Patent number: 4519750Abstract: A variable-delivery refrigerant compressor wherein the delivery of a compressed refrigerant is adjustable by an actuator which is movable with a discharge pressure of the compressor between a first position at which plural discharge valves corresponding to compression chambers are rendered operative, and a second position at which at least one of the discharge valves is rendered inoperative. A pilot switch valve is disposed in a passage through which the discharge pressure is applied to the actuator. The switch valve controls a supply of refrigerant of the discharge pressure to the actuator such that the actuator is placed in the first position while a suction pressure of the compressor is relatively high, and in the second position while the suction pressure is relatively low.Type: GrantFiled: November 29, 1983Date of Patent: May 28, 1985Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Masayuki Kurahashi, Hisao Kobayashi, Hiroyuki Deguchi
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Patent number: 4511313Abstract: A swash plate compressor is disclosed which is provided with a compression capacity control apparatus capable of returning an output pressure of a high pressure chamber of one cover to a low pressure chamber of the same cover. The control apparatus comprises a delivery chamber which is communicated with a high pressure chamber of the other cover, isolated from the high pressure chamber of said one cover and connected to a delivery conduit. The control apparatus also comprises a compression capacity control passageway providing communication between the delivery chamber and the low pressure and high pressure chambers of said one cover. A valve member is disposed in the control passageway to interrupt the communication between the delivery chamber and the high pressure chamber of said one cover while establishing communication between the low pressure and high pressure chambers of said one cover.Type: GrantFiled: September 1, 1982Date of Patent: April 16, 1985Assignee: Diesel Kiki Company, Ltd.Inventors: Yutaka Ishizuka, Tsunenori Shibuya
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Patent number: 4507059Abstract: A variable delivery compressor having therein a plurality of compression chambers is adapted for compressing a refrigerant gas of a cooling circuit. The compressor has a first delivery chamber communicating with the compression chambers by way of a fixedly arranged valve and a second delivery chamber communicating with the compression chambers by way of a movably arranged delivery valve. This movable valve is formed to include a base portion, a plurality of reed portions formed to radially extend from the outer circumference of the base portion and arranged to face delivery ports, and at least one protrusion formed to radially extend from the outer circumference of the base portion for suppressing the warp of the base portion.Type: GrantFiled: January 27, 1984Date of Patent: March 26, 1985Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisa-KushoInventors: Hisao Kobayashi, Makoto Ohno, Shinichi Suzuki
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Patent number: 4507058Abstract: An apparatus for moving a fluid medium comprising a positive displacement member movable to move the fluid medium and a drive mechanism adapted to be driven by a motor for driving the positive displacement member to move the fluid medium. The drive mechanism includes a wobble plate coupled to the positive displacement member for driving the positive displacement member. The drive mechanism is responsive to back pressure on the positive displacement member for adjusting the angle of the wobble plate to thereby change the volume of the fluid medium movable by the positive displacement member.Type: GrantFiled: December 20, 1983Date of Patent: March 26, 1985Assignee: Carr-Griff, Inc.Inventor: Ivar L. Schoenmeyr
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Patent number: 4492527Abstract: A wobble plate piston pump in which means for holding the slipper shoes in close proximity with the wobble plate comprises a first retainer member in the form of an annular plate, loosely fitted on the drive shaft and formed with a plurality of through bores circumferentially arranged in the vicinity of its outer periphery and loosely receiving therethrough trunk portions of the slipper shoes swivellingly engaging the pistons, the retainer member being movable in directions substantially parallel to the wobble plate as the slipper shoes slide on or in close proximity to the wobble plate, a second retainer member having a hollow tubular portion loosely fitted through the first retainer member and unremovably fitted in a central bore formed in the wobble plate and a flanged portion holding the first retainer member on flanged portions of the slipper shoes to keep the latter in close proximity with the wobble plate.Type: GrantFiled: February 17, 1983Date of Patent: January 8, 1985Assignee: Diesel Kiki Co., Ltd. (Japanese Corp.)Inventors: James C. Swain, David L. Thomas
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Patent number: 4486152Abstract: A hydraulic pump having spring loaded valves utilizes a spring providing a constant spring force and a spring providing a varying spring force. The varying spring force depending upon the position of the pump piston. The pump suction valve opens after a variable delay relative to the beginning of the piston suction phase when the pressure prevailing in the pump's dead chamber falls below a predetermined value. Abrupt decompression to the dead chamber is therefore avoided resulting in reduced energy consumption and noise level.Type: GrantFiled: November 21, 1980Date of Patent: December 4, 1984Assignee: Hydro Rene LeducInventor: Louis-Claude Porel
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Patent number: 4486151Abstract: A diaphragm pump having at least two working chambers communicating with inlet and outlet chambers via non-return valves, includes a reciprocal wobble plate affixed to a diaphragm in the working chambers. The wobble plate has a central guide shaft with a carrier at its free end, the carrier having resilient material, such as a rubber coating or rubber blocks, associated with it. A groove in a rotor connected to a drive shaft receives the carrier. The slope of the guide shaft with respect to the drive shaft is adjustable, and the resilient material holds the carrier in a preset eccentric position with respect to the drive shaft so that under overload conditions the carrier will press against the resilient material and reduce the eccentricity of the carrier with respect to the drive shaft. Once the overload conditions no longer exist, the guide shaft returns to its normal position and normal pumping continues.Type: GrantFiled: May 11, 1982Date of Patent: December 4, 1984Inventor: Veikko Korhonen-Wesala
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Patent number: 4480964Abstract: There is disclosed in a refrigerant compressor whose crankcase is vented to compressor suction, a passive lubrication system having a lubrication-vent path arrangement which vents the crankcase while also assuring lubrication of the compressor's critical bearing surfaces using oil entrained in the refrigerant and wherein centrifugal action is utilized to always maintain some amount of oil in the crankcase for assured lubrication of the critical bearing surfaces under all operating conditions while also minimizing the amount of oil permitted to circulate in the refrigerant circuit for improved air conditioning performance.Type: GrantFiled: August 26, 1983Date of Patent: November 6, 1984Assignee: General Motors CorporationInventor: Timothy J. Skinner