Radial Cam Or Eccentric Patents (Class 417/221)
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Patent number: 6872056Abstract: A radial piston pump used for producing high fuel pressure in fuel systems of internal combustion engines, in particular in a common rail injection system includes a housing with at least one cylinder and a drive shaft is supported in the housing and having at least one cam section. A stroke ring is disposed encompassing the cam section a piston contained in each cylinder is supported against the stroke ring. A possibility for adjusting the delivery quantity of the radial piston pump is achieved in that an adjusting ring is disposed between the cam section and the stroke ring and the internal opening of this adjusting ring is eccentric in relation to the outer contour and can be rotated around the central axis of the internal opening into a desired angular position in relation to the cam section.Type: GrantFiled: August 12, 2002Date of Patent: March 29, 2005Assignee: Robert Bosch GmbHInventor: Hans-Peter Stiefel
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Publication number: 20040241009Abstract: The present invention relates to a motor-pump aggregate with a motor and a piston pump, more particularly for electronically controlled brake systems of motor vehicles, wherein pistons of the pump are drivable by way of an eccentric that is connected to a shaft of the motor and are connected by means of a coupling ring, and wherein the motor has a holding plate. According to the present invention, a projection is provided on the holding plate and extends until into the range of motion of the coupling ring. This provides a stop for the coupling ring, on the one hand, and an improved outlet for leakage fluid of the pump, on the other hand.Type: ApplicationFiled: June 8, 2004Publication date: December 2, 2004Inventors: Dieter Dinkel, Rudiger Briesewitz, Peter Volz, Hans-Dieter Reinartz
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Publication number: 20040191074Abstract: In a pump plate (26) of a feed pump, an inlet port (26b) and an outlet port (26c) are formed around a shaft hole (26a) through which a driving shaft is inserted, and a rib (26f), which partitions each of the inlet port (26b) and the outlet port (26c) in the circumferential direction thereof and connects opposite sides (an inner peripheral side and an outer peripheral side) of each of the inlet port (26b) and the outlet port (26c), is provided. Namely, each of the inlet port (26b) and the outlet port (26c) is divided into two portions in the circumferential direction thereof, by the rib (26f).Type: ApplicationFiled: March 16, 2004Publication date: September 30, 2004Applicant: DENSO CORPORATIONInventor: Hidenori Kajita
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Patent number: 6796773Abstract: A variable capacity rotary compressor, which precisely controls variation of a compression capability into a desired discharge pressure, and which minimizes a resistance to rotation of a rotating shaft, and thus improves the capacity of the rotary compressor.Type: GrantFiled: December 12, 2003Date of Patent: September 28, 2004Assignee: Samsung Electronics Co., Ltd.Inventors: Jin Kyu Choi, Seung Kap Lee, Cheol Woo Kim
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Publication number: 20040184923Abstract: A check valve is provided to each discharge port, which communicates between a corresponding working chamber and a high pressure chamber in an integrated compressor/expander apparatus. A valve mechanism, which is opened in a motor mode, is provided to communicate between the working chamber and the high pressure chamber.Type: ApplicationFiled: January 27, 2004Publication date: September 23, 2004Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Shigeki Iwanami, Yasushi Yamanaka, Yasushi Suzuki, Atsushi Inaba, Hironori Asa, Keiichi Uno, Kazuhide Uchida
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Patent number: 6790013Abstract: A variable displacement vane-type fluid pump is provided which permits improved regulation of the pump discharge such that the pump can meet the various requirements of lubrication for internal combustion engines at all speeds with minimized use of power. Of course, the vane pump may also be utilized in a wide range of power transmission and other fluid distribution applications. The vane pump of the invention may also use both hydrostatic and mechanical actuators to control the position of its containment ring or eccentric ring and hence, regulate the output of the pump. According to yet another aspect of the present invention, to prevent inlet flow restriction or cavitation, a valve may be provided to permit some of the pump outlet or discharge flow to bleed into the pump inlet to provide needed velocity energy to the fluid flow into the pump inlet.Type: GrantFiled: July 10, 2002Date of Patent: September 14, 2004Assignee: BorgWarner Inc.Inventors: Douglas G. Hunter, Albin J. Niemiec
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Patent number: 6755624Abstract: A dual capacity compressor, which can maintain a fixed eccentricity and stable operation, even when the compressor is rotated in both the regular and reverse directions in order to provide multiple compression capacities, is provided. This dual capacity compressor implements an improved key member and associated key member fitting parts to inhibit relative motion of the crank pin and the eccentric sleeve during operation, so as to reduce or eliminate a destabilizing effect due to centrifugal forces on the eccentric sleeve and external forces applied through the connecting rod.Type: GrantFiled: February 20, 2002Date of Patent: June 29, 2004Assignee: LG Electronics Inc.Inventors: Young Ju Bae, Jong Bong Kim, Chul Gi Roh, Jae Sung Sim, Dal Soo Kang, Min Young Seo, Hyun Kim, Kyoung Jun Park, Kee Joo Kim, Hee Hyun Kim
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Publication number: 20040101418Abstract: A fuel pump for an engine may include a cylinder, a piston displaceably disposed in the cylinder, and a cam driven by the engine. The cam engages the piston to form a cam-follower mechanism so that the rotation of the cam generates a reciprocal movement of the piston inside the cylinder. The cam preferably includes a variable cam lobe having a maximum radius that is a function of engine speed so that the displacement of the piston generated by the variable cam lobe is a function of the engine speed. The cam may also include a weight that is subject to a centrifugal force when the ram is rotating. Alternatively, the maximum radius of the variable cam lobe may be a function of pump outlet pressure so that the displacement of the piston generated by the variable cam lobe is a function of the pump outlet pressure.Type: ApplicationFiled: November 27, 2002Publication date: May 27, 2004Applicant: DaimlerChrysler CorporationInventors: David Roth, David Fiddes, Christopher Glaspie
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Patent number: 6609896Abstract: The reliability of a compressor may be improved by affixing an inertia-increasing member to the drive shaft of the compressor in order to reduce the forces imposed on a mechanical coupling between the drive shaft and a compression member when the rotation of the drive shaft is initiated. A method of selecting the size and configuration of the inertia-increasing member is also provided.Type: GrantFiled: January 28, 2002Date of Patent: August 26, 2003Assignee: Bristol Compressors, Inc.Inventors: Scott G. Hix, John R. Walters, Jr., David T. Monk, Tyrone S. Simerly
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Publication number: 20030143083Abstract: The reliability of a compressor may be improved by affixing an inertia-increasing member to the drive shaft of the compressor in order to reduce the forces imposed on a mechanical coupling between the drive shaft and a compression member when the rotation of the drive shaft is initiated. A method of selecting the size and configuration of the inertia-increasing member is also provided.Type: ApplicationFiled: January 28, 2002Publication date: July 31, 2003Applicant: BRISTOL COMPRESSORS, INC.Inventors: Scott G. Hix, John R. Walters, David T. Monk, Tyrone S. Simerly
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Publication number: 20030063980Abstract: Engineered surface treatments are applied to different types of hydraulic motors and pumps to improve the life of the contacting surfaces in said motors and pumps. The engineered surface treatments are selected from texture modifications and tribiological coatings and selectively applied to one or both of the contacting surfaces to reduce friction and improve fatigue life under poor lubrication operating conditions.Type: ApplicationFiled: September 16, 2002Publication date: April 3, 2003Applicant: The Timken CompanyInventor: Gary L. Doll
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Publication number: 20030059314Abstract: The invention relates to a piston engine which is essentially comprised of an engine shaft (1) and a set of modules, each of which comprises a cylinder (2a, 2b) and a piston (3a, 3b) powered by the engine shaft in the cylinder, each module resulting in vibratory excitation of the engine at a determined fundamental frequency (Fa, Fb). Rather than introducing phase differences between the various vibratory excitations, as is the case in prior art, the invention introduces a frequency offset (&Dgr;Fab) between the fundamental frequencies (Fa, Fb) thereof in order to avoid a high-amplitude vibration at a common excitation frequency (F), arising from the spectral spread thus obtained.Type: ApplicationFiled: October 3, 2002Publication date: March 27, 2003Inventor: Michel Sagnet
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Publication number: 20030049136Abstract: A reversible reciprocating piston compressor includes a crankcase defining at least one cylinder therein and a crankshaft rotatably supported by the crankcase. The crankshaft includes a drive portion and a crankpin eccentrically positioned relative to an axis of rotation of the crankshaft. A piston is reciprocable within the cylinder and a connecting rod assembly is provided between the crankpin and the piston to reciprocally drive the piston in response to forward or reverse rotation of the crankshaft. A cam assembly is operably connected to the crankpin and is engageable with the drive member to effectuate a first stroke length in a first direction of rotation of the crankshaft and a second stroke in a second direction of rotation of the crankshaft. The cam assembly includes a cam, a driven portion and a counterweight.Type: ApplicationFiled: September 12, 2001Publication date: March 13, 2003Inventors: Dan M. Manole, Elizabeth A. Robbins
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Publication number: 20030044288Abstract: In a fuel path through which fuel is supplied to a pump-cam chamber accommodating a drive shaft and a cam for lubrication, an annular throttle fuel path is formed between an inside wall of a cylindrical body and an outside wall of a sphere, when the sphere is in contact with a seat provided inside the cylindrical body. The seat is provided with cuts through which the fuel flows when the sphere is in contact with the seat. Even if foreign material mixed in fuel once blocks a part of the annular throttled path, the blockage of the foreign material is released, when the fuel flow stops and the sphere leaves the seat, so that the fuel is always supplied sufficiently to the pump-cam chamber, resulting in preventing burn-in of the drive shaft and the cam, in particular, at a high engine revolution range.Type: ApplicationFiled: August 30, 2002Publication date: March 6, 2003Applicant: DENSO CORPORATIONInventor: Yasutaka Utsumi
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Publication number: 20030031568Abstract: A radial piston pump used for producing high fuel pressure in fuel systems of internal combustion engines, in particular in a common rail injection system includes a housing with at least one cylinder and a drive shaft is supported in the housing and having at least one cam section. A stroke ring is disposed encompassing the cam section a piston contained in each cylinder is supported against the stroke ring. A possibility for adjusting the delivery quantity of the radial piston pump is achieved in that an adjusting ring is disposed between the cam section and the stroke ring and the internal opening of this adjusting ring is eccentric in relation to the outer contour and can be rotated around the central axis of the internal opening into a desired angular position in relation to the cam section.Type: ApplicationFiled: August 12, 2002Publication date: February 13, 2003Inventor: Hans-Peter Stiefel
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Publication number: 20020182086Abstract: Dual capacity compressor is provided to prevent relative movement between parts that maintain eccentricity. To this end, the dual capacity compressor comprises a power generating unit 20, having a reversible motor 21 and 22 and a crank shaft 23 inserted into the motor 21 and 22; a compressing unit 30 having a cylinder 32, a piston 31 and a connecting rod 33 connected with the piston 31; a crank pin 110 and 210 eccentrically formed on an upper end portion of the crank shaft 23; an eccentric sleeve 120 and 220 mounted between the crank pin 110 and 210 and one end of the connecting rod 33; and a key member 130 and 230 for completely restricting the eccentric sleeve 120 and 220 to the crank pin 110 and 210 in both clockwise and counter clockwise direction rotations of the motor.Type: ApplicationFiled: February 20, 2002Publication date: December 5, 2002Applicant: LG Electronics Inc.Inventors: Young Ju Bae, Jong Bong Kim, Chul Gi Roh, Jae Sung Sim, Dal Soo Kang, Min Young Seo, Hyun Kim, Kyoung Jun Park, Kee Joo Kim, Hee Hyun Kim
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Patent number: 6478548Abstract: The invention relates to a radial piston pump (1) with an eccentric actuator unit (19), the radial piston pump (1) having several pumping units (20) driven by a common drive shaft (18). A central axis (35) of a circumferential bearing surface (37) of an actuator eccentric (33) designed for displacing pump pistons (24) of the pumping units (20) extends at an angle relative to a central axis (31) of the drive shaft (18) or an actuator unit (19) incorporating the actuator eccentric (33).Type: GrantFiled: November 20, 2000Date of Patent: November 12, 2002Assignee: Weber-Hydraulik GmbHInventor: Johann Auer
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Patent number: 6470992Abstract: An auxiliary solenoid controlled variable displacement power steering pump, hydraulic systems incorporating same, and method for improving the efficiency of variable displacement power steering pumps. In one embodiment, a rotor is arranged within a pump body, and a cam fitted on an outer periphery of the rotor and movably arranged within the pump body to form a variable volume pump chamber. The cam is biased towards a position within the pump body to create maximum displacement. A mechanism is provided for forcing the cam into a position of fixed minimum or reduced displacement under certain conditions, such as low engine speed and power steering demand. In a preferred embodiment, the mechanism comprises a solenoid driven connecting rod that is operatively connected to the cam. Activation of the solenoid forces the cam to a position of fixed minimum or reduced displacement.Type: GrantFiled: April 3, 2001Date of Patent: October 29, 2002Assignee: Visteon Global Technologies, Inc.Inventors: Steven Thomas Nissen, Brian Stanley Modrzejewski, Shawn Patrick Cap'ser
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Patent number: 6468045Abstract: The invention discloses a rotary piston pump, which comprise a cylinder block, a front end cover and a rear end cover secured to the front and the rear end surfaces of the cylinder block respectively; a cam rotor being fitted in the chamber of the cylinder block, the portion of the rotor having the maximum radius comes into sliding contact with the inner wall of the cylinder block so as to form an axially extending sealing region; a shaft, the rotor is mounted on the shaft and rotatable therewith; a separating means for separating the axially extending sealed chamber, which is formed between the outer surface of rotor and the inner wall of the cylinder block, into an induction chamber and an exhaustion chamber; an inlet and an outlet respectively provided at the two sides of the separating means and communicated with the induction chamber and the exhaustion chamber, the separating means comprises: an axially extending circular arc-shaped recess formed in the inner wall of the cylinder block with its axis beinType: GrantFiled: January 5, 2001Date of Patent: October 22, 2002Inventor: Xiaoying Yun
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Patent number: 6454544Abstract: A pump for conveying a liquid has a housing and a shaft rotatably supported in the housing. An eccentric drive is arranged in the housing. At least one drive element is provided and is configured to be driven by the eccentric drive. The shaft is configured to adjust the eccentricity of the eccentric drive. The drive element is configured to be adjusted according to the eccentricity of the eccentric drive by a translatory movement in a direction transverse to the shaft.Type: GrantFiled: December 18, 2000Date of Patent: September 24, 2002Assignee: Hydraulik-Ring GmbHInventors: Edwin Palesch, Gerold Sluka, Ralf Naumann
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Patent number: 6446451Abstract: A two-stage reciprocating compressor is provided. The compressor includes a block with a single cylinder and associated single compression chamber and single piston. The compressor further includes a crankshaft. The crankshaft has an eccentric crankpin that is operatively connected to the piston. A reversible motor is provided to rotate the crankshaft in a forward direction and in a reverse direction. An eccentric cam is rotatably mounted on the eccentric crankpin. The eccentric cam is held stationary with respect to the crankpin when the crankshaft is rotating in the forward direction. When rotating in the forward direction, the crankshaft drives the piston at a full stroke between a bottom position and a top dead center position. The eccentric cam rotates with respect to the crankpin when the crankshaft is rotating in the reverse direction. When rotating in the reverse direction, the crankshaft drives the piston at a reduced stroke between an intermediate position and the top dead center position.Type: GrantFiled: March 30, 2001Date of Patent: September 10, 2002Assignee: York International CorporationInventors: David T. Monk, Joe T. Hill, Philip C. Wagner, Joseph F. Loprete, Michael R. Young, Charles A. Singletary
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Patent number: 6413054Abstract: A fuel injection pump having a cam drive and an injection adjuster piston, acting on the cam drive and serving the purpose of an injection onset adjustment. The injection adjuster piston on a face end encloses at least one pressure chamber that via a control valve is either made to communicate with a pressure source or a relief line or can be closed entirely. The control valve is actuated by an a proportional electromagnet. As a result, only a little adjusting medium is required, to obtain a high efficiency of the injection onset adjustment, and advantageously the injection adjuster piston is stressed only axially, and frictional forces on the circumference of the injection adjuster piston are thus avoided.Type: GrantFiled: July 24, 2000Date of Patent: July 2, 2002Assignee: Robert Bosch GmbHInventors: Wolfgang Geiger, Walter Fuchs, Hubert Greif, Stephan Jonas
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Patent number: 6341946Abstract: A apparatus for gearless shifting, includes at least one crank, and an arm assembly, coupled to the at least one crank, for telescoping to adjust a length of the at least one crank, to selectively and controllably adjust a stroke length of the at least one crank. A pump also is provided including a variable-stroke length apparatus.Type: GrantFiled: June 14, 1999Date of Patent: January 29, 2002Assignee: International Business Machines CorporationInventor: John Falk Kelley
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Publication number: 20010004441Abstract: A pump for conveying a liquid has a housing and a shaft rotatably supported in the housing. An eccentric drive is arranged in the housing. At least one drive element is provided and is configured to be driven by the eccentric drive. The shaft is configured to adjust the eccentricity of the eccentric drive. The drive element is configured to be adjusted according to the eccentricity of the eccentric drive by a translatory movement in a direction transverse to the shaft.Type: ApplicationFiled: December 18, 2000Publication date: June 21, 2001Applicant: Hydraulik-Ring GmbHInventors: Edwin Palesch, Gerold Sluka, Ralf Naumann
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Patent number: 6217287Abstract: A two-stage reciprocating compressor is provided. The compressor includes a reversible motor that rotates a crankshaft. The crankshaft is connected to a piston by a mechanical system. The mechanical system drives the piston at a full stroke between a bottom position and a top dead center position when the motor is operated in a forward direction. The mechanical system drives the piston at a reduced stroke between an intermediate position and the top dead center position when the motor is operated in the reverse direction. The compressor also includes a control for selectively operating the motor in either the forward direction at a first preselected, fixed speed or in the reverse direction at a second preselected fixed speed.Type: GrantFiled: January 22, 1999Date of Patent: April 17, 2001Assignee: Bristol Compressors, Inc.Inventors: David T. Monk, Joe T. Hill, Philip C. Wagner, Joseph F. Loprete, Michael R. Young, Charles A. Singletary
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Patent number: 6190137Abstract: A reciprocating piston compressor having at least one cylinder, a reciprocable piston disposed in the cylinder, a crankshaft rotatable in both a forward and a reverse direction, the crankshaft having a cylindrical eccentric portion, a latching member pivotally engaged with the crankshaft, a cam disposed about the crankshaft eccentric portion, the piston operatively connected to the cam, and a spring connected to one of the cam and the crankshaft, the position of the latching member influenced by the spring. The cam is rotatable about the crankshaft eccentric portion between a first cam position corresponding to a first piston stroke length during forward rotation of the crankshaft, and a second cam position corresponding to a second piston stroke length during reverse rotation of the crankshaft. In one of the first and second cam positions, the cam is rotatably locked to the crankshaft eccentric portion by the latching member.Type: GrantFiled: September 24, 1999Date of Patent: February 20, 2001Assignee: Tecumseh Products CompanyInventors: Elizabeth A. Robbins, Raymond D. Howell, Timothy Westcott
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Patent number: 6132177Abstract: A two stage reciprocating compressor and associated HVAC systems and methods are disclosed. The reciprocating compressor includes a crankshaft having an eccentric crankpin, a reversible motor for rotating the crankshaft in a forward and a reverse direction, and an eccentric, two position cam rotatably mounted over the crankpin. The crankshaft and cam combine to cause the piston to have a first stroke when the motor operates in the forward direction and a second stroke when the motor operates in the reverse direction. The cam and crankpin also include stabilization means to restrict the relative rotation of the cam about the crankpin. A lubrication system is provided to lubricate the engaging surfaces of the crankshaft and cam and between the cam and the bearing surface of the connecting rod. There is also provided a control for selectively operating the motor either in the forward direction at a first power load or in the reverse direction at a reduced second power load.Type: GrantFiled: August 13, 1998Date of Patent: October 17, 2000Assignee: Bristol Compressors, Inc.Inventors: Joseph F. Loprete, Michael R Young, John W Tolbert, Jr., David T Monk, Philip C Wagner, Joe T Hill, Larry Pippin, Robert B. Peters
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Patent number: 6099259Abstract: For a refrigerant compressor having two capacities, a camming structure operable in different manners depending on direction of crankshaft rotation, to achieve each capacity while providing top dead center piston operation thru the use of a circular cam bushing which is eccentrically, rotatably mounted on the crankshaft eccentric and within the connecting rod bearing wherein the combined eccentricities of the bushing and the eccentric equal the primary stroke of the piston. A first stop mechanism is provided for stabilizing the bushing on the eccentric upon rotation of the crankshaft in one direction whereby the eccentricities of the eccentric and bushing become aligned and remain so during synchronous rotational orbiting motion of the eccentric and bushing during rotation of the crankshaft for producing full stroke and full capacity.Type: GrantFiled: January 26, 1998Date of Patent: August 8, 2000Assignee: Bristol Compressors, Inc.Inventors: David T. Monk, Joe T. Hill, Philip C. Wagner, Joseph F. Loprete, Michael R. Young
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Patent number: 6092993Abstract: A stabilizing structure for a throw adjusting eccentric cam in a two-stage reciprocating compressor is provided. The compressor includes a block that has at least one cylinder with an associated compression chamber and piston, a crankshaft that includes an eccentric crankpin, and a reversible motor for rotating the crankshaft in a forward and a reverse direction. An eccentric, two position cam is rotatably mounted over the crankpin. The cam rotates to and operates at a first position relative to said crankpin when the motor is running in the forward direction and rotates to and operates at a second position relative to said crankpin when the motor is running in the reverse direction. The combined eccentricities of the crankpin and the cam cause the piston to have a first stroke when the motor operates in the forward direction and a second stroke when the motor operates in the reverse direction.Type: GrantFiled: August 14, 1997Date of Patent: July 25, 2000Assignee: Bristol Compressors, Inc.Inventors: Michael R. Young, Joseph F. Loprete, David T. Monk, Philip C. Wagner, Joe T. Hill, Robert B. Peters
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Patent number: 6068450Abstract: A mechanical actuated diaphragm pump for pumping fluids. The pump includes a pump housing having a chamber, a flexible diaphragm forming at least a portion of one wall of the chamber, a reciprocally movable member for causing reciprocal movement of a portion of the diaphragm, a rotating shaft connected to the reciprocally movable member such that rotation of the shaft causes reciprocation of the reciprocally movable member and a motor having an output shaft for driving the rotating shaft. The reciprocally moving member and the motor may be attached by an Oldham coupling.Type: GrantFiled: May 3, 1999Date of Patent: May 30, 2000Assignee: United States Filter CorporationInventors: Manor M. Parikh, John A. Soper, Ronald M. Bradbury
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Patent number: 5951261Abstract: A reciprocating piston compressor including at least one cylinder, a reciprocable piston disposed therein, a crankshaft rotatable in forward and reverse directions and having an eccentric crankpin, and a cam disposed about the crankpin, the piston operatively connected to the cam. The cam is rotatable about the crankpin between a first angular position corresponding to a first piston stroke length during forward crankshaft rotation and a second angular position corresponding to a second piston stroke length during reverse crankshaft rotation. In one of its first and second angular positions, the cam is rotatably locked to the crankpin.Type: GrantFiled: June 17, 1998Date of Patent: September 14, 1999Assignee: Tecumseh Products CompanyInventor: Andrew W. Paczuski
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Patent number: 5865087Abstract: A cooperating rotor device having a first rotor supported for rotation about a first rotation axis (R1) and a second rotor supported for rotation about a second rotation axis (R2). A cylinder rotor (32), supporting a plurality of radially aligned cylinders (33) spaced apart and supported for collective rotation about one rotation axis (R1). Each cylinder (33) having a piston (39) slidable within. A piston rotor (61) has a number of piston rollers (64) corresponding to the number of cylinders (33), each radially supporting a piston (39), with each piston roller (64) independently rotatably supported and all piston rollers (64) collectively rotatable about the other rotation axis (R2). Members including the piston rollers (64), pistons (39), cylinders (33), and cylinder ports (34), all sharing a common plane of rotation about diametrically opposed non-rotating valve ports (74a) and (74b).Type: GrantFiled: October 18, 1996Date of Patent: February 2, 1999Inventor: Howard A. Olson
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Patent number: 5810569Abstract: A pump is disclosed having a variable cam arrangement under the influence of which a plunger is reciprocable. The variable cam arrangement comprises a plurality of cam rings which in an embodiment of the pump are relatively moveable in order to adjust the shape of the effective cam surface of the cam arrangement, and hence adjust the delivery rate of the pump.Type: GrantFiled: June 27, 1995Date of Patent: September 22, 1998Assignee: Lucas Industries public limited companyInventors: Paul Buckley, Ian Roy Thornthwaite, John Roderick Jefferson
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Patent number: 5370096Abstract: A fuel pumping apparatus for supplying fuel to an internal combustion engine includes a first fluid pressure operable piston movable against the action of a spring to advance the timing of fuel delivery by the apparatus. The spring bears at its end remote from the piston against a spring abutment which is in the form of a further piston. The position of the further piston is controlled by a temperature responsive device and when the engine is hot the further piston is advanced from a first position to a second position. A first stop limits the movement of the first piston under increasing fluid pressure when the further piston is in its first position and is secured to the housing and a second stop limits the movement of the first piston under increasing fluid pressure when the further piston is in its second position the second stop being carried on the further piston.Type: GrantFiled: December 22, 1993Date of Patent: December 6, 1994Assignee: Lucas Industries Public Limited CompanyInventor: Michael P. Cooke
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Patent number: 5368448Abstract: A variable-stroke crank mechanism has a crankshaft rotatably supported in a casing for relative rotation about an axis with a crankpin displaced out of alignment with the axis. An eccentric collar is rotatably mounted on the crankpin for revolving around the axis in response to the relative rotation of the crankshaft with respect to the casing to reciprocally move an actuator relative to the casing. A stroke adjusting mechanism for adjusting angular displacement of the eccentric collar on the crankpin comprises an internal ring gear integral with the eccentric collar concentrically with the crankpin, a planetary pinion rotatably mounted on the crankshaft and meshing with the internal ring gear, a sun gear meshing with the planetary pinion, and a stroke adjusting shaft rotatably disposed axially in a portion of the crankshaft and coupled to the sun gear, whereby the stroke adjusting shaft is adjustable in angular displacement to adjust a stroke of reciprocating movement of the actuator.Type: GrantFiled: February 26, 1993Date of Patent: November 29, 1994Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Fujiya Maruno, Shoji Ohta, Shyuji Ichijoh
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Patent number: 5340285Abstract: The present invention relates to a drive assembly, in particular a motor pump assembly for slip-controlled brake systems, with a device for transforming rotatory into translatory movements, including a drive shaft which is movably guided in a housing, and an eccentric device which is associated with the drive shaft. In order to be able to change the dimension of the eccentric, it is provided that the eccentric device is formed of two eccentrics which are turnable relative to each other and are in mesh with each other in a form-fit manner, so that at least an eccentric sum dimension formed from the individual eccentric dimensions of two eccentrics, respectively, can be set variably.Type: GrantFiled: March 8, 1993Date of Patent: August 23, 1994Assignee: Alfred Teves GmbHInventors: Hans-Dieter Reinartz, Helmut Steffes
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Patent number: 5280745Abstract: A variable-stroke radial-plunger-type apparatus for use as an air compressor, for example, has a main shaft rotatably disposed in a casing assembly, an eccentric collar angularly movably mounted on a eccentric crankpin of the main shaft, and a coupling ring angularly movably mounted on the eccentric collar. A plurality of radial plungers with inner ends coupled to the coupling ring are slidably fitted in respective cylinders that are rockably supported it the casing assembly. The angular movement of the eccentric collar on the crankpin is adjusted by a stroke adjusting mechanism. The coupling ring can be positioned with respect to the main shaft and the casing assembly by a W-mechanism. The W-mechanism may comprise external and internal gears or pulleys and sprockets.Type: GrantFiled: May 22, 1992Date of Patent: January 25, 1994Assignee: Honda Giken Kogyo Kabushiki KaishaInventor: Fujiya Maruno
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Patent number: 5241823Abstract: A hydraulic power system having first and second hydraulic power converters in which the speed of the second power converter is proportional to the speed of the first power converter. The first hydraulic power converter includes a plurality of hydraulic power producing elements. At least one of the power producing elements provides power for power driving, and at least one of the power producing elements pumps hydraulic fluid. The hydraulic fluid is connected to and drives the second hydraulic power converter at a speed proportional to the speed of the first power converter.Type: GrantFiled: October 4, 1991Date of Patent: September 7, 1993Assignee: Rineer Hydraulics, Inc.Inventors: Stephen R. Stone, Larry D. Nichols
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Patent number: 5197860Abstract: A hydraulic apparatus for a construction machine, which is adapted to prevent the number of revolutions of an engine from increasing when the flow of the fluid discharged by a variable displacement hydraulic pump driven by the engine is cut off. The hydraulic apparatus comprises a proportional solenoid (11) connected to a fuel supply control lever (13) so as to vary the horsepower characteristics of the engine, which are set by the action of a governor (12) based on manipulated variable of the fuel supply control lever (13) when the flow of the fluid discharged by said pump is cut off, and a controller (10) for controlling the proportional solenoid (11). In this apparatus, a decrement (.DELTA.Nr) in a target number of revolutions per minute (Nr) of the engine, which can be obtained by subtracting a target number of revolutions per minute (Nrb) of the engine at the desired engine horsepower characteristics (l.sub.Type: GrantFiled: July 27, 1989Date of Patent: March 30, 1993Inventors: Kimio Nishida, Toshio Yokoyama, Yukio Moriya, Takeshi Kobayashi
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Patent number: 5133244Abstract: In a radial piston hydraulic motor of the "star-shaped" type the variation of the cylinder capacity is achieved by the fact that the motor crankshaft is provided with a mechanism which varies the eccentricity, this mechanism being powered by hydraulic actuators carried by the shaft and controlled by a circuit external to the frame of the motor, comprising a rotating coupling and stop valves, while stability of the cylinder capacity may be obtained by means of locking mechanisms carried on the shaft.Type: GrantFiled: July 30, 1991Date of Patent: July 28, 1992Inventor: Bruno Giamello
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Patent number: 5125802Abstract: A fuel injection timing control apparatus for a distributor type fuel injection pump which enables the advantages of a servo valve arrangement provided in a timing piston to be utilized with the servo valve being disposed on the timing piston high-pressure chamber side. The fuel injection apparatus can be applied to engines with parts on the timer low-pressure chamber side without this causing interference, because the servo valve and any control mechanism are provided on the high-pressure chamber side.Type: GrantFiled: November 19, 1990Date of Patent: June 30, 1992Assignee: Zexel CorporationInventors: Hisashi Nakamura, Satoru Ito
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Patent number: 5076057Abstract: A variable-stroke crank mechanism includes a crankshaft rotatably mounted in a casing and having an eccentric crankpin, and a plurality of fluid pressure actuators disposed substantially radially with respect to the crankshaft, for pressing the eccentric crankpin to rotate the main shaft and the casing relatively to each other. The fluid pressure actuators are selectively supplied with a working fluid. An eccentric collar is rotatably mounted on the crankpin and operatively coupled to the fluid pressure actuators. The eccentric collar having an axis which is eccentrically displaced with respect to the axis of the crankpin. The crankpin and the eccentric collar are arrested in their respective angular positions by intermeshing internal and external gears. The crank mechanism may be incorporated in a plunger-type hydraulic unit, which may also be incorporated in a hydromechanical continuously variable transmission.Type: GrantFiled: April 18, 1990Date of Patent: December 31, 1991Assignee: Honda Giken Kogyo Kabushiki KaishaInventor: Fujiya Maruno
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Patent number: 5059096Abstract: A rotary distributor type fuel pumping apparatus has an annular cam ring having internal cam lobes which impart inward movement to a pumping plunger as the distributor member is rotated. A piston is movable in a cylinder to vary the angular setting of the cam ring and the piston is coupled to the cam ring by means of a member having a gear tooth profile which is located in a recess in the piston. The member is integrally formed with a mounting having a pair of oppositely extending arms which are individually secured against mutually inclined flats on the periphery of the cam ring.Type: GrantFiled: December 26, 1990Date of Patent: October 22, 1991Assignee: Lucas Industries Public Limited CompanyInventor: Kenneth M. Harris
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Patent number: 5054371Abstract: A hydraulic pump/motor in which working piston elements are arranged for radial reciprocation. A cam is arranged eccentrically to a rotor which carries the pistons. Fluid cavities are provided in feet on the pistons, in the faces of a polygon to which the feet are attached, and in bearing pads in the outer ends of the cylinders to provide hydrostatic balancing. The pistons are hollow and are equipped with check valves to prevent centrifugal force from expelling fluid from the polygon and foot cavities. The cam includes mating spherical surfaces which compensate for bending forces applied to the cam. An improved mechanism for adjusting the cam position uses inherent forces to eliminate the need for a power assist device for cam adjustment. Port plates on opposite sides of the rotor provide inlet to the unit near the axis of the unit and outlet near the outer edge to alleviate stresses and increase efficiency.Type: GrantFiled: September 11, 1989Date of Patent: October 8, 1991Inventor: Louis E. Swinney
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Patent number: 5042252Abstract: The present invention is a neutral shifting mechanism for a hydrostatic transmission. A motor track ring has a groove and cam slot for receiving a control rod of the transmission, with the control rod having a cam portion for engaging the cam slot to lock the track ring in a position concentric with the pintle of the hydraulic motor, i.e. a neutral position. In the normal position, the cam portion positions the track ring eccentrically, allowing a speed control shaft to shift the hydrostatic transmission by pivoting the pump track ring about the control rod.Type: GrantFiled: February 22, 1990Date of Patent: August 27, 1991Assignee: Unipat AGInventors: Dale I. Havens, Norman E. Jolliff, George D. Arnold
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Patent number: 4963075Abstract: A pump assembly having a pair of parallel annular hollow manifolds forming a pump frame with a series of pump units carried by the manifolds radially arranged relative to a central drive shaft which extends axially of the centers of the ring-like manifolds. The drive shaft has an eccentric which cooperates with a bearing hub to impart orbital movement to the hub when the shaft rotates. Each pump unit has a cylinder and piston with a piston rod connected to the piston being coupled to the bearing hub to reciprocate the piston within the cylinder. A diaphragm carried by the cylinder is spaced from the piston to define a chamber between the diaphragm and piston containing a quantity of driving liquid with the opposite side of the diaphragm forming a wall portion of a cavity for the fluid to be pumped, this cavity having inlet and outlet valves housed in a tubular valve body connected to the manifolds.Type: GrantFiled: August 4, 1988Date of Patent: October 16, 1990Assignee: The Charles Machine Works, Inc.Inventors: Philip E. Albertson, Arthur D. Deken
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Patent number: 4830589Abstract: A variable stroke positive displacement piston pump in which the effective eccentricity of the crankshaft controlling the stroke is adjustable by means of a worm/worm gear combination driving a hub to which eccentric rings are keyed.Type: GrantFiled: September 8, 1988Date of Patent: May 16, 1989Assignee: Hypro Corp.Inventor: Ramon Pareja
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Patent number: 4802453Abstract: A fuel injection pump of the rotary distributor type has a fluid pressure operable piston connected to a cam ring of the pump for the purpose of timing adjustment. Flow of fluid into or out of one end of the cylinder containing the piston is controlled by a valve member slidable in a bore in the piston. The valve member is pressure balanced and is positioned by means of control pistons in response to variation in fluid pressure. The piston is subject to reaction forces when the cam followeres of the pump engage the leading faces of the cam lobes and the tendency for piston movement is resisted by a ball valve. Opposite reaction forces occur when the cam followers move over the crests of the cam lobes and piston movement is resisted by restricting liquid flow from the other end of the cylinder.Type: GrantFiled: July 27, 1987Date of Patent: February 7, 1989Assignee: Lucas Industries Public Limited CompanyInventor: Ian R. Thornthwaite
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Patent number: 4777866Abstract: This invention relates to a radial piston device with a rotatable casing useful as a pump or a motor. The device is highly efficient with an overall efficiency of 0.95 and a mechanical efficiency of 0.97, a wide rotational speed range of over 1000 rpm, and can be made with continuously variable or fixed displacement. The device is compact in size, light in weight and simple in structure making it easy to manufacture. Moreover, the device can be constructed from a variety of materials without restrictive material requirements, can operate with both filtered and non-filtered oil, and is not sensitive to environmental effects. When the device is mounted on a wheel to form a hydrostatic transmission system, the layout and performance of the vehicle are significantly improved. The displacement control means provided by the present invention is also applicable to other motors or pumps with eccentric shafts. This invention also provides a simple and reliable flat oil seal.Type: GrantFiled: September 30, 1986Date of Patent: October 18, 1988Assignee: Nanjing Automobile Research InstituteInventor: Ze-ying Tan
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Patent number: 4768422Abstract: A hydraulic pump or motor having a rotor carrying radially disposed pistons. In one embodiment, the connection for introducing and withdrawing fluid at the rotor is made by manifolds which are in complemental, sliding contact against a surface of the rotor. Piston-like projections on the manifold are exposed to the pressurized fluid flowing through the apparatus to hold the manifolds in tight sealing engagement against the rotor surface. The effects of centrifugal force on the operation of the apparatus are minimized by mechanically securing the pistons against outward radial movement during high speed rotation, and by admitting and withdrawing fluid at locations relatively near the axis of rotation of the rotor. An alternate embodiment is disclosed which has a floating rotor so that the pressure of the operating fluid is used to effect a tight seal at the junction of the stationary and rotating components in the high pressure region.Type: GrantFiled: September 15, 1986Date of Patent: September 6, 1988Inventor: Louis E. Swinney