Patents Examined by Jane E. Obee
  • Patent number: 4776774
    Abstract: In a hydraulic double-acting hydropneumatic pressure multiplying device suited for generating hydraulic pressure, and comprising a cylinder within which a piston is slidably mounted. The multiplying device is capable of generating hydraulic pressure in both the backward and forward strokes of the piston within the cylinder. For this purpose, the cylinder is closed at the bottom by a lower cap having an upwardly extending plunger received within a portion extending upwardly from the piston. The cylinder also provides an upper cap with a dome and the upwardly extending portion of the piston is reciprocating within this dome, thus defining between the portion of the piston and the dome a first pressure generating chamber, and within the upwardly extending portion of the piston and the plunger of the lower cap a second pressure generating chamber for obtaining hydraulic pressure in both of the strokes of the piston.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: October 11, 1988
    Inventor: Julio C. Anastasia
  • Patent number: 4772186
    Abstract: An improved torque control mechanism for a rotary vane, air motor tool includes acceleration and speed responsive slidable elements positioned in grooves that lie in a plane transverse to the spin axis of the motor and which form an angle with the radii extending from the spin axis. The elements cooperate with a cam plate which operates a fluid supply valve to close off air supply to the tool whenever torque of the tool causes the speed of the motor to decrease below a threshold level. A bypass valve and passage is manually operable to initiate operation of the air motor. An auxiliary low volume, low pressure valve and passage permits an operator to provide minor adjustments of the orientation of the output shaft of the tool. For reverse operation, the speed and acceleration control is eliminated by operation of a reverse operation control mechanism.
    Type: Grant
    Filed: February 18, 1986
    Date of Patent: September 20, 1988
    Assignee: The Aro Corporation
    Inventors: Douglas E. Pyles, David N. Carey
  • Patent number: 4772187
    Abstract: A single rotary pump is provided with a driven valve having outer curved faces and inner curved recesses along the major axis thereof, a rotary piston having vanes between which there are semi-ellipses having raised portions therebetween, said valve being driven by an external source to cause rotation of said piston whereby liquid under pressure flows from an inlet of the pump to an outlet of the pump.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: September 20, 1988
    Inventor: George A. Thompson
  • Patent number: 4767284
    Abstract: The present invention provides a screw vacuum pump unit in which both a screw block and a driving motor are mounted on one side surface of a casing of a speed change gear, both axes of a male rotor and a female rotor in the screw block are arranged in vertical adjacency within a substantially perpendicular virtual plane, and suction ports and discharge ports are arranged on both sides with the vertical plane intervening therebetween, whereby maintenance can be facilitated.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: August 30, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Kazuaki Shiinoki, Koutarou Naya, Shinji Mitsuhashi, Tadashi Hayakawa, Riichi Uchida
  • Patent number: 4762480
    Abstract: Rotary pump comprising a housing having a bore and a first adjacent lateral side wall having at least one inlet slit and a second adjacent lateral side wall having at least one outlet slit of at least equal size to said inlet slit for flow of medium axially therethrough, said slits in said lateral side walls defining the path of flow for said medium from said inlet axially directly into said bore and then from said bore axially directly to said outlet slit, a rotor mounted in the bore for rotation about an axis generally parallel to and eccentric to the bore axis, a plurality of vanes pivotally mounted on the periphery of the rotor having free ends in sliding sealing contact with said bore, each vane having lateral surfaces having an inner edge facing the rotor and an outer edge facing the bore which edges on rotation of the rotor pass over an inner boundary edge of the inlet and outlet slits facing the bore of the housing, said inlet slit and outlet slit, curving along an arc around the rotational axis of ro
    Type: Grant
    Filed: March 6, 1987
    Date of Patent: August 9, 1988
    Assignee: SKF GmbH
    Inventors: Otmar Winkler, Heinz Peter, Egon Pfaller
  • Patent number: 4761125
    Abstract: A hydraulic device having a first shaft including a first rotor, and a second shaft including a second rotor, the first and second rotors being constructed by adjacently fitting the same shape rotor elements, respectively. The rotor elements have teeth on the outer periphery thereof at a constant interval, and each tooth has a tip portion fluid-tightly engaged with an inner wall of a housing of the device. The rotor elements are adjacently fitted to the shaft in such a manner that the rotor elements are displaced in the same rotational direction along the axial direction of the shaft. The teeth tip portions of the rotor elements adjacent to each other are overlapped so that spiral paths are defined on the outer surface of the rotor.
    Type: Grant
    Filed: March 25, 1987
    Date of Patent: August 2, 1988
    Assignee: Nippon Soken, Inc.
    Inventors: Mitsuo Inagaki, Shigeki Iwanami, Hideaki Sasaya, Hiromichi Nakano
  • Patent number: 4759427
    Abstract: The nozzle assembly of a constant fine lubrication device in which a line extending from a constant fine lubricant supplying unit extends into the oil hole of a nozzle top mounted on a holding member for holding an object to be lubricated so that lubricating oil is injected from the nozzle of the nozzle top to the object to be lubricated.
    Type: Grant
    Filed: October 21, 1986
    Date of Patent: July 26, 1988
    Assignee: Nippon Seiko Kabushiki Kaisha
    Inventors: Yoshiaki Onose, Yasushi Morita, Teruhiko Abe
  • Patent number: 4754846
    Abstract: An oil reservoir assembly for delivering oil through an oil port in a vertical housing wall of a heavy, clumsy, housed mechanism which must be moved into operating position through a restricted access opening. The oil reservoir assembly is attached to the vertical housing wall in oil delivering disposition relative to the oil port. During positioning of the mechanism the reservoir assembly becomes operably associated with the distal end of an oil supply line. The assembly comprises a casing having a wall with a hole therethrough. The casing defines an oil reservoir chamber and is connected to the vertical wall of the mechanism with the oil reservoir chamber in fluid communication with the oil port. A frusto-conically shaped guidance member is mounted within the chamber in alignment with the hole.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: July 5, 1988
    Assignee: Westinghouse Electric Corp.
    Inventors: Robert W. Sulzer, Jr., Donald L. Mills
  • Patent number: 4755115
    Abstract: A shaft seal assembly for a compressor in which the compressor includes a drive shaft adapted to be connected with the crank shaft of an combustion engine, comprising: an annular seal lip made of rubber and an annular seal ring made of fluoropolymer. The annular seal lip and seal ring are disposed in an axial direction which is substantially parallel with the axis of rotation of the drive shaft in such a manner that the escape of lubricating oil and refrigerant around the drive shaft is prevented.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: July 5, 1988
    Assignee: Atsugi Motor Parts Company, Limited
    Inventor: Seiji Akaike
  • Patent number: 4754847
    Abstract: A tandem axle assembly includes an interaxle differential mechanism which includes a separate lubricant sump for providing lubrication to the interaxle differential during both initial start-up and normal running conditions. One of the interaxle differential side gears is disk-shaped, and includes internally formed side gear teeth in a planar rear face, internally formed clutch teeth in a planar front face, and external teeth around the radial periphery. The interaxle differential is coupled to divide power to two separate axle differential assemblies. Each axle differential assembly includes a pair of pinion gears having spherical gear seats and a pair of side gears having conical gear seats. Each axle differential assembly is rotatably supported within a housing by a pair of tapered roller bearings. The outer race of each bearing is located within an end of the carrier, while the inner race is positioned on a reduced diameter hub of a bearing retainer threaded into an opening in the housing.
    Type: Grant
    Filed: December 31, 1986
    Date of Patent: July 5, 1988
    Assignee: Dana Corporation
    Inventors: Jack G. Glaze, Terry L. Oster
  • Patent number: 4749342
    Abstract: In a diaphragm pump with a diaphragm in the form of a rolling diaphragm that separates a delivery chamber from a fluid-filled pressure chamber and that with its peripheral edge is firmly clamped between a casing body and pump cover, and with an oscillating hydraulic piston which is displaceable in a bore of the casing body between the pressure chamber and a hydraulic reservoir, so as to actuate the diaphragm, the rolling diaphragm rolls alternatingly up an outer roll-off cylinder formed by the wall of the pressure chamber and off an inner roll-off cylinder formed by the peripheral surface of a support piston for the rolling diaphragm that is axially displaceable in the pressure chamber, the front surface of which support piston is connected with the corresponding surface section of the rolling diaphragm.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: June 7, 1988
    Assignee: LEWA Herbert Ott GmbH & Co.
    Inventor: Horst Fritsch
  • Patent number: 4749059
    Abstract: A cable lubricating device (1) including a split housing (2). Lubricant (25) is introduced into the housing through a vertically oriented orifice (6), the cable (37) advancing in a generally horizontal direction. A coupling adaptor (59) permits withdrawl of lubricant by a standard fitting (64) without danger of the collapse of hose (56) even at high lubricant discharge pressures. A series of sponges (18, 19) apply lubricant to the cable in a metered fashion. A method is also disclosed wherein lubricant may be "preloaded" into conduit (26) to enhance uniform lubricant distribution.
    Type: Grant
    Filed: January 17, 1986
    Date of Patent: June 7, 1988
    Assignee: American Polywater Corporation
    Inventors: Nelson Jonnes, Gene C. Weitz
  • Patent number: 4747764
    Abstract: The invention is fluid pump which in addition to displacing fluid can be a fluid driven motor and when the fluid is compressible a compressor or expanding fluid driven motor. The pump has an annular cavity formed between its rotor and casing and around the rotor rotational axis. There is a power transfer means such as a shaft which drives the rotor in rotation when the pump is used to displace or also to compress a fluid. When the pump is used also as a motor the fluid being displaced is also the power transfer means and the rotor shaft is used for mechanical power take-off. The rotor surface at the annular cavity, the wave surface, has at least one undulation and each wave surface undulation forms with the other cavity surfaces a cavity undulation. A casing surface at the annular cavity, the face surface, has a plurality of circumferential spaced axial plane slots each with a partition pivotally extending into the annular cavity but not abutting the annular cavity walls.
    Type: Grant
    Filed: July 9, 1986
    Date of Patent: May 31, 1988
    Inventor: Joseph F. Frasca
  • Patent number: 4747762
    Abstract: A fluid machine comprises two rotors, one rotor having at least one projection which engages within a recess within the other rotor. During operation, fluid passes between the first rotor and a peripheral surface of a working chamber within which the rotors are mounted. A fluid inlet and a fluid outlet are so arranged as to face generally in the direction in which the fluid moves around the first rotor. Pressure-equalization passages are provided in the rotors, and extend between the opposed axial faces of the rotors whereby, to equalize the fluid pressure at the axial faces. The machine may be used as a pump for water and other liquids.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: May 31, 1988
    Assignee: Fairbairn International PTY. Ltd.
    Inventor: George A. Fairbairn
  • Patent number: 4746280
    Abstract: A sliding vane pump having a hydraulic vane actuation system. The pump includes a case with a liner having an eccentric surface therein. A rotor and shaft rotate within the liner. The rotor has a plurality of radial slots therein, with a vane slidably disposed in each of the slots. Each vane has a radially inner edge with first and second sides extending substantially normally therefrom. A radially outer edge extends normally from the first side and is opposite and substantially parallel to the radially inner edge. A beveled edge extends radially inwardly from the outer edge and interconnects the outer edge with the second side. As the rotor rotates, the beveled edge is the leading edge of the vane. A plurality of radially oriented holes are defined through each vane. The holes intersect the inner edge and a portion of the beveled edge and a portion of the outer edge.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: May 24, 1988
    Assignee: Corken International Corporation
    Inventors: Willie Wystemp, Michael F. Hughes
  • Patent number: 4739861
    Abstract: An oil filler adapter comprising a container for holding oil, a piercing tube which punctures the can of oil and a flow tube which connects with the oil inlet part of fill tube of an engine. The piercing tube acts as a seal with the container when the oil is initially disposed in the container. When the tube is rotated by inserting a cap into a slot in the tube, the seal is broken.
    Type: Grant
    Filed: April 3, 1986
    Date of Patent: April 26, 1988
    Inventor: Warren Desjardins
  • Patent number: 4739862
    Abstract: A pressure lubricator for lubricating and cooling mechanical seals comprising a vertical high pressure vessel containing a lubricant/coolant liquid maintained at high pressure by a blanket of compressed gas supplied to the top of the vessel and a motor driven pump at the base of the vessel to circulate the lubricant/coolant liquid to the mechanical seals and then back to the vessel. Such a pressure lubricator is effective in lubricating and cooling mechanical seals with minimum energy input and minimum risk associated with loss of power to the pump.
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: April 26, 1988
    Inventor: H. Leon Mullis
  • Patent number: 4738603
    Abstract: A hydraulic vane which includes a housing; a cam ring disposed in the housing and having an inner peripheral surface formed in a cam curve; a drive shaft rotatably mounted in the housing; a rotor connected coaxially to the drive shaft for being driven thereby, the rotor having a plurality of vane slots defined radially in an outer peripheral wall of the rotor and fluid reservoir slots for introducing a fluid provided at the bottom of the vane slots; a plurality of vanes slidably inserted in the vane slots plurality of vane chambers defined among the rotor, the vanes and the cam ring and inlet and outlet ports defined in the housing and connected to the vane chambers wherein the maximum slanting angle of the inner peripheral surface of the cam ring in an expansion section of the cam curve has a ratio in the range of 0.9 to 1.7 to a slanting angle in an expansion section of a reference cam curve.
    Type: Grant
    Filed: October 27, 1986
    Date of Patent: April 19, 1988
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventor: Katushiko Hattori
  • Patent number: 4738601
    Abstract: A fuel injection pump for internal combustion engines having control slides that are both axially displaceable and rotatable on the pump piston via a governor rod for controlling the injection quantity and the injection onset. A slit hub is releasably clamped on the governor rod with a driver arm, the hub being arranged to engage the control slide between two working faces and the hub has a driver recess for the rotational adjustment of the control slide. The driver recess is engaged by a tang joined with the control slide.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: April 19, 1988
    Assignee: Robert Bosch GmbH
    Inventors: Josef Guntert, Walter Hafele, Eberhard Hofmann
  • Patent number: 4736819
    Abstract: A splash lubrication system is provided for motor vehicle transmissions and comprises an oil sump (42) in the bottom portion of a case (30). The case (30) accommodates a transmission shaft (31) provided with gears (34 to 37) which are immersed in the oil at least partly when the said oil sump (42) is filled completely. In order to prevent the synchronizing mechanism from being blocked by cold and, consequently, very viscous oil in the presence of extremely low operating conditions--a condition which could lead to unsynchronized faulty gear shifting operations and, thus, damage to the transmission, the oil sump (42) is connected with a cavity (33) into which oil is drawn from the oil sump (42) under low operating temperature conditions of the transmission. To this end, preferably, an expansion body (38) is arranged in a cavity (33) in a transmission shaft (31) which contracts under cold conditions, and the cavity (33) is connected with the oil sump (42).
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: April 12, 1988
    Assignee: ZWN Zahnradwerk Neuenstein GmbH & Co.
    Inventor: Erich Muller