Resilient Means Interposed Between Working Member And Relatively Movable Power Transmission Element Patents (Class 92/84)
  • Patent number: 11965503
    Abstract: A pump comprising a bore pump fluid end having a reciprocating element bore, a discharge valve assembly comprising a discharge valve seat and a discharge valve body, and a suction valve assembly comprising a suction valve seat and a suction valve body; a hollow, cylindrical reciprocating element; a hollow reciprocating element adapter comprising a first end having a fluid inlet opposite a second end having a fluid outlet, wherein the second end of the reciprocating element adapter is connected to and in fluid communication with the fluid intake end of the reciprocating element; a pump power end having a push rod connected to the first end of the reciprocating element adapter; and a movable manifold comprising a reciprocating element end and a fluid intake end, wherein the reciprocating element end of the movable manifold is connected to and in fluid communication with the fluid inlet of the reciprocating element adapter.
    Type: Grant
    Filed: January 18, 2022
    Date of Patent: April 23, 2024
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Joseph A. Beisel, Justin Lee Hurst, Dick C. Headrick, James Alan Olis
  • Patent number: 11905939
    Abstract: Modular mechanically driven diaphragm pump features are presented herein. Such a diaphragm pump can include a motor, a drive mechanism, and a coupling mounted on a wheeled frame. A diaphragm pump can be mounted to the coupling by forming mechanical static and dynamic connections to brace a housing of the diaphragm pump relative to a drive rod which is moved by the drive mechanism to operate the pump. These mechanical static and dynamic connections can be broken to dismount the pump for replacement or servicing. In some cases, a gas charge can be introduced on the non-working fluid side of the diaphragm to boost performance and/or a dampener can be integrated into the housing of the diaphragm pump and mounted/dismounted with the diaphragm pump.
    Type: Grant
    Filed: February 21, 2023
    Date of Patent: February 20, 2024
    Assignee: Graco Minnesota Inc.
    Inventors: Bradley H. Hines, Brian W. Koehn, Christopher C. Hines, Adam K. Collins
  • Patent number: 11639713
    Abstract: Modular mechanically driven diaphragm pump features are presented herein. Such a diaphragm pump can include a motor, a drive mechanism, and a coupling mounted on a wheeled frame. A diaphragm pump can be mounted to the coupling by forming mechanical static and dynamic connections to brace a housing of the diaphragm pump relative to a drive rod which is moved by the drive mechanism to operate the pump. These mechanical static and dynamic connections can be broken to dismount the pump for replacement or servicing. In some cases, a gas charge can be introduced on the non-working fluid side of the diaphragm to boost performance and/or a dampener can be integrated into the housing of the diaphragm pump and mounted/dismounted with the diaphragm pump.
    Type: Grant
    Filed: May 7, 2021
    Date of Patent: May 2, 2023
    Assignee: Graco Minnesota Inc.
    Inventors: Bradley H. Hines, Brian W. Koehn, Christopher C. Hines, Adam K. Collins
  • Patent number: 11067104
    Abstract: An integrated piston and bearing may include a piston having an outer peripheral surface and a first end and a second end and a bearing arranged on the outer peripheral surface. The bearing may include a surface contour including a setback region with a first thickness and a full region with a second thickness, thicker than the first thickness. The bearing may also include a snubbing chamfer transitioning between the first and second thicknesses.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: July 20, 2021
    Assignee: Caterpillar Inc.
    Inventors: Kurt S Goslovich, Thomas K. Yeung, Ananda S. Ponnusamy
  • Patent number: 11033371
    Abstract: A pump assembly for a dental cleaning appliance includes a fluid chamber, a piston, and a drive. The drive rotates a coupling member having two angularly opposed pins. An arm pivotably connected to the piston has a seat for receiving one of the pins to couple the piston to the drive. Through continued rotation of the coupling member, the piston moves within the fluid chamber to draw fluid into the fluid chamber until the second detent contacts the arm to push it away from the first detent to decouple the drive from the piston. This allows a compressed spring to actuate the piston to urge a burst of fluid from the fluid chamber.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: June 15, 2021
    Assignee: Dyson Technology Limited
    Inventors: Robert Lawrence Tweedie, Christopher Graham Vincent, Geoffrey Michael Burlington
  • Patent number: 11035349
    Abstract: A linear compressor includes: a piston configured to reciprocate along an axial direction of the linear compressor; a resonance spring configured to elastically support the piston along the axial direction; a motor assembly configured to provide a driving force to the piston, the motor assembly including a magnet that is disposed radially outside the piston; and a supporter configured to be coupled to the piston, the magnet, and the resonance spring. The supporter includes: a piston coupler coupled with the piston; a magnet coupler coupled with the magnet; and a spring coupler coupled with the resonance spring. The piston coupler, the magnet coupler, and the spring coupler are integrally formed by aluminum die casting.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: June 15, 2021
    Assignee: LG Electronics Inc.
    Inventors: Hyunsoo Kim, Geonwoo Kim, Chulgi Roh
  • Patent number: 10598163
    Abstract: A semi-free rotating crankshaft actuator (80) for an oral healthcare appliance comprises a chamber (82), a spring loadable plunger (85), and a crank mechanism (88). The crank mechanism (88) comprises at least a drive pin (90) rotatably driven about a drive axis (96), and a crank shaft (94) semi-freely rotatable about the drive axis, wherein the crank shaft (94) couples to the spring loadable plunger (85) and is partially driven about the drive axis (96) via (i) the drive pin (90) in a first operational mode, (ii) the spring loadable plunger (85) in a second operational mode, and (iii) the drive pin (90) in a third operational mode that comprises at least completing an incomplete actuation of the plunger (84) from an undesired end position to the desired end position in response to the crank shaft (94) pushing the plunger (84) from the undesired end position to the desired end position.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: March 24, 2020
    Inventors: Joldert Maria Boersma, Pieter Herman Klokman, Klaas Kooijker, Egbert Van De Veen, Aaldert Geert Zijlstra, Stephanus Jacob Gerardus Tamminga
  • Patent number: 10280914
    Abstract: A linear compressor is provided. The linear compressor may include a cylinder; a frame coupled to an outer side of the cylinder; a cylinder groove defined on an outer circumferential surface of the cylinder; and a sealing member provided in the cylinder groove. The sealing member may be provided between the outer circumferential surface of the cylinder and an inner circumferential surface of the frame.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: May 7, 2019
    Inventors: Youngcheol Han, Donghan Kang, Joonsung Park, Kwangwoon Ahn, Sanghyun Lim
  • Patent number: 9347441
    Abstract: Improvements in compressor manufacture are achieved by utilizing polymeric components which retain at least 90% of their dimensions after being exposed to a mixture of refrigerants and/or lubricants for 30 days at 60° C. Polymeric materials include (i) polyetherimides, (ii) polyphenylene sulfides, (iii) polyketones, (iv) polysulfones, (v) liquid crystal polymers, and (vi) combinations thereof. Metal coatings on the polymers are the preferred embodiments for housings.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 24, 2016
    Inventors: Brian Jason Rice, Marcos Fernando Borges, Andrew May, Donald W. DeMello, Haralur Gurulingamurthy, Shawn William Lee, Ernest Caldwell, Walter Thompson
  • Patent number: 9004252
    Abstract: A transmission may include gears and a clutch to allow the transfer of torque, at a variety of gear ratios, between an input shaft and an output shaft. The clutch may include a cushion piston to decrease the velocity of a transmission piston before the transmission piston engages a clutch element. The cushion piston may be contained within the transmission piston and configured so the cushion piston ceases movement toward the clutch element before the transmission piston. The pistons may be coupled together such that the cushion piston may resist movement of transmission piston toward the clutch element.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: April 14, 2015
    Assignee: ZF Friedrichshafen AG
    Inventor: Muneer AbuSamra
  • Patent number: 8955654
    Abstract: A vehicle shock absorber generates an additional counter-force acting counter to the direction of movement near the limit position of movement. The shock absorber substantially comprises a damping medium-filled damping cylinder that is divided into two damping chambers by a main piston. The main piston is axially moveable relative to the damping cylinder and is attached to a piston rod. A second piston/damping piston that contains one or more first and second through-ducts is mounted to the piston rod. The ducts are defined by first and second flow-limiting devices such as multiple thin washers. The damping piston slides in a restricting space located in the damping cylinder. The restricting space has an inside diameter smaller than the inside diameter of the damping cylinder. The additional counter-force is substantially constant throughout the entire stroke in order to create gentle braking of the damping movement.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: February 17, 2015
    Assignee: Ohlins Racing AB
    Inventors: Nils Göran Nygren, Magnus Danek, Johan Jarl
  • Patent number: 8474365
    Abstract: A diaphragm pump (1) has at least two pump heads (3) arranged around a central eccentric pump drive (2), the diaphragms (4) being drivingly connected to the eccentric pump drive (2) via connecting rods (5). The eccentric pump drive (2) has a connecting rod ring (6) to which the ends (9) of the connecting rods are connected via elastic intermediates (10).
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: July 2, 2013
    Assignee: KNF Flodos AG
    Inventors: Stephan Kaufmann, Christian Kissling, Michael Bucher
  • Patent number: 8430019
    Abstract: Adjusting device which has a main cylinder (2) and a spring cylinder (3) arranged separately therefrom, wherein, during a pressure drop, the spring force acts hydraulically on the main cylinder (2). In order to design such an adjusting device more effectively, the effective spring piston area is variable.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: April 30, 2013
    Assignee: Damcos A/S
    Inventors: Ulrik Dantzer, Kurt Beuschau
  • Publication number: 20130047837
    Abstract: A piston-combination comprising an elongate chamber bounded by an inner chamber wall, and comprising a piston sealingly movable in the chamber relative to the chamber wall at least between a first and a second longitudinal position of the chamber, said chamber having cross-sections of different cross-sectional areas at the first and second longitudinal positions, and at least substantially continuously differing cross-sectional areas at intermediate longitudinal positions between the first and second longitudinal positions, the cross-sectional area at said second longitudinal position being smaller than the cross-sectional area at the first longitudinal position, said piston changing dimensions and having different cross-sectional areas thereby adapting to different cross-sectional areas of the chamber during the relative movements of the piston between the first and second longitudinal positions through said intermediate longitudinal positions of the chamber, said combination engaging a rigid surface and bei
    Type: Application
    Filed: August 24, 2012
    Publication date: February 28, 2013
    Applicant: NVB International UK LTD.,
    Inventor: Nicolaas Van der Blom
  • Publication number: 20130008304
    Abstract: A clamping cylinder is disclosed. The cylinder includes a cylinder block defining a receiving chamber and two vents communicating with the receiving chamber, the cylinder block further defining a through hole communicating with the receiving chamber at a side; a piston slidably mounted in the receiving chamber and defining a through groove corresponding to the through hole, the piston further comprising a resisting surface; and a pushrod assembly comprising a push block movably mounted in the through hole, and a resilient member mounted in the through groove, the resilient member is connected to the push block; wherein the resilient member is adapted to pull the push block towards the piston, and the resisting surface is configured to resist the push block so that the push block moves along the through hole when the piston slides along the receiving chamber.
    Type: Application
    Filed: November 22, 2011
    Publication date: January 10, 2013
    Inventors: HUAN-FAN XU, XUE-FEI PENG
  • Patent number: 8109199
    Abstract: A reciprocating compressor comprises: a cylinder having an oil pocket on an inner circumferential surface of a piston insertion hole for inserting a piston with a predetermined width and depth; and a piston having a bearing portion protruding so as to slidably contact an inner circumferential surface of the piston insertion hole, and inserted into the piston insertion hole of the cylinder, wherein the bearing portion is formed to have a length shorter than that of the oil pocket of the cylinder. Accordingly, a frictional loss between the cylinder and the piston is reduced.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: February 7, 2012
    Assignee: LG Electronics Inc.
    Inventors: Sung-Gi Kim, Dong-Han Kim
  • Patent number: 8100233
    Abstract: A disk brake vibration damper comprising a cylindrical element (4) equipped on its cylindrical peripheral surface (41) with a layer of a supple material (5) which exhibits properties of adhesion with the materials of the piston (3) and of the cylindrical element (4). This cylindrical element (4) is intended to be positioned inside an axial cavity (30) of the piston with the layer of supple material (5) in contact with the interior wall (31) of the cavity of the piston (3).
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: January 24, 2012
    Assignee: Robert Bosch GmbH
    Inventor: Pascal Picot
  • Publication number: 20110132187
    Abstract: Exemplary embodiments are directed to a hydraulic stored-energy spring mechanism for a high voltage circuit breaker. The spring mechanism includes a working cylinder situated in a working cylinder housing, at least one spring and at least one compression piston. The compression piston is slidably displaceable in a storage cylinder. The at least one storage spring pressurizes fluid located in the storage piston via the compression piston. The storage spring is held in a form-fitting manner by a support tube unit in the preloaded state.
    Type: Application
    Filed: January 7, 2011
    Publication date: June 9, 2011
    Applicant: ABB Technology AG
    Inventor: Henrik LOHRBERG
  • Patent number: 7950321
    Abstract: A hydraulic system includes a master cylinder having a housing, a piston axially movably disposed in the housing, and a piston rod, the piston bounding a pressure chamber filled with a hydraulic fluid, the piston upon actuation of the master cylinder being axially moved by the piston rod to pressurize the hydraulic fluid; an actuating device for moving the piston rod; a slave cylinder; a pressure-medium line connecting the master cylinder and slave cylinder; and at least one damping element arranged between the actuating device and the slave cylinder.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: May 31, 2011
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventors: Roland Welter, Urban Panther, Wolfgang Sulger, Matthias Zink, Dirk Kluender, Markus Hausner
  • Patent number: 7908962
    Abstract: A compressor is provided that includes a supplementary torque providing part that reduces a speed of a piston compression of refrigerant and increases the speed of the piston in drawing of the refrigerant. This structure reduces a compression rate of the refrigerant in compression relatively, and increases a re-expansion rate, to maximize suction efficiency.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: March 22, 2011
    Assignee: LG Electronics Inc.
    Inventors: Hyun Kim, Ji Young Bae, Chul Gi Roh, Chang Yong Jang, Jong Min Sin
  • Publication number: 20100236400
    Abstract: A recipricator restraint assembly for a Z-crank axial piston machine is described. The assembly includes two gimbal arms each linked together at gimbal link joint that intersect at a point T. Point T lying in a medial plane M being defined as the plane passing through the point of coincidence of the crank and crankshaft axes to which the line that bisects the crank angle is normal. Each of the gimbal arms is pivotally mounted at an identical distance L from point T. A cylinder gimbal is pivotally mounted from the cylinder cluster and a recipricator gimbal is pivotally mounted from the recipricator. The recipricator gimbal pivot axis is equidistant from point X and T as is the cylinder gimbal pivot axis.
    Type: Application
    Filed: August 8, 2008
    Publication date: September 23, 2010
    Inventors: Noel Stephen Duke, Robert Gulliver Lynn
  • Publication number: 20080022850
    Abstract: Compressor including a supplementary torque providing part for reducing a speed of a piston (340) in compression of refrigerant, and increasing the speed of the piston (340) in drawing of the refrigerant, thereby reducing a compression rate of the refrigerant in compression relatively, and increasing a re-expansion rate, to maximize a suction efficiency.
    Type: Application
    Filed: December 24, 2003
    Publication date: January 31, 2008
    Inventors: Hyun Kim, Ji Young Bae, Chul Gi Roh, Chang Yong Jang, Jong Min Sin
  • Patent number: 7273022
    Abstract: This invention produces a variable compression ratio in internal combustion engines, based on a sliding concentric piston which moves up by an internal spring and down by the different changing pressures over the concentric piston head, within the combustion chamber. This invention changes the compression ratio in an instantaneous and continuous way, depending directly on the pressure of the fuel mixture load in the combustion chamber.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: September 25, 2007
    Inventor: Francisco Azocar Valdivia
  • Patent number: 7124678
    Abstract: An apparatus for preventing abrasion in a reciprocal compressor, including a cylinder, a reciprocal motor having a stator and a mover, and generating a linear reciprocation driving force, a piston inserted into an inside space of the cylinder to be linearly movable, a piston rod coupled to the piston to be movable in the radial direction of the piston, and coupled to the mover of the reciprocal motor, for transmitting the linear reciprocation driving force of the reciprocal motor to the piston, and a concentricity control means coupled to a junction between the piston and the piston rod, for fixing the piston and the piston rod in the axial direction, and allowing a relative motion thereof in the radial direction. The apparatus prevents abrasion from being generated between the cylinder and the piston due to processing errors and assembly errors of components of the reciprocal compressor.
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: October 24, 2006
    Assignee: LG Electronics Inc.
    Inventors: Jong-Koo Lee, Gye-Young Song
  • Patent number: 7090474
    Abstract: A diaphragm pump which overcomes the problem of diaphragm failure due to overfill of the oil transfer chamber. An overfill preventive element in the form of a mechanical stop, a fully closed coil spring, or a valve system, or alternatives are provided.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: August 15, 2006
    Assignee: Wanner Engineering, Inc.
    Inventors: Kenneth Eugene Lehrke, Richard D. Hembree
  • Patent number: 7004729
    Abstract: A compressor, in particular for air conditioning systems in motor vehicles, having a housing, a housing sealing cover, a drive shaft with bearings and a drive device for pistons that are displaced back and forth. The drive device transfers the rotational displacement of the drive shaft into the back-and-forth displacement of the pistons. The compressor also includes a cylinder block, in which the pistons that are displaced back and forth take in and compress coolant, a valve device, in addition to a valve plate with intake and discharge valves comprising intake and discharge chambers for an intake pressure zone and a discharge pressure zone. A cylinder head may be a separate element from the housing, in pot-shaped form, or the housing sealing cover. The intake and discharge chambers, the valve device, and the cylinder block may be situated in the closed side of the pot-shaped housing.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: February 28, 2006
    Assignee: LuK Fahrzeug-Hyrdaulik GmbH & Co. KG
    Inventors: Georg Weber, Peter Barth, Jean-Claude Gnaly, Volker Seipel
  • Patent number: 6779987
    Abstract: An oilless high pressure pump suitable for use in devices such as pressure washers and the like is described. The pump includes an eccentric assembly suitable for converting rotary motion of a rotating shaft to rectilinear motion. One or more straps couple the eccentric assembly to a piston assembly. The straps communicate the rectilinear motion of the eccentric assembly to the piston assembly, reciprocating the piston assembly to pump the liquid.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: August 24, 2004
    Assignee: DeVilbiss Air Power Company
    Inventors: Shane Dexter, Allen Palmer, Mark W. Wood, William B. Daniel
  • Patent number: 6758129
    Abstract: A collapsible push rod for a brake booster in a vehicle is provided, having first and second telescoping members, and retractable locking means for selectively locking the first and second members together against telescoping. During a frontal impact collision, the members telescope into one another to shorten the length of the push rod and compensate for rearward movement of the brake booster and forward movement of the driver. The push rod is operable in the collapsed state. The push rod is also re-settable after the collision, and includes features for returning the push rod to its normal un-telescoped length following the collision, if the push rod is not damaged in the collision. The retractable locking means includes an electrically actuated solenoid for selectively locking and unlocking the first and second members against telescoping, in response to an electrical signal applied to the solenoid.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: July 6, 2004
    Assignee: Delphi Technologies, Inc.
    Inventors: Derek T. Dreischarf, Michel J. Vermoesen
  • Patent number: 6640541
    Abstract: A master cylinder for use in the power train of a motor vehicle to actuate the brakes or the friction clutch is designed to avoid the generation of screeching noise and/or the transmission of stray movements to the piston rod in response to shifting of the piston relative to the housing and relative to the sealing element(s) between the piston and the housing. This can be accomplished by causing the piston to turn relative to the housing and the sealing element(s) during axial movement in the housing and/or by installing one or more dampers between the piston and the housing and/or between the piston and the piston rod. The dampers can constitute separately produced parts and/or specially configured and/or finished surfaces provided on the piston and contacting the housing and/or the sealing element(s). The invention also relates to improvements in the configuration and/or the material(s) of the piston.
    Type: Grant
    Filed: January 10, 2003
    Date of Patent: November 4, 2003
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Ludwig Winkelmann, Rainer Venz, Ulrich Helfmeier, Dieter Adler, Uwe Stratil, Thomas Bertelshofer, Karl-Ludwig Grell, Harald Peschke, Roland Welter
  • Patent number: 6595105
    Abstract: Reciprocating compressor including a connecting rod for converting a rotating movement of a crank shaft into a linear reciprocating movement, a piston for making a linear reciprocating movement inside of a cylinder block by the connecting rod, and resonating means for resonating the piston, wherein the resonating means is a supplementary piston fitted to the piston additionally and a resonator fitted between the supplementary piston and the piston, or a resonator in a space between a sleeve side part and a piston side part of a divided connecting rod, thereby preventing an over pressure loss of the refrigerant and enhancing a performance by increasing refrigerant flow rate.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: July 22, 2003
    Assignee: LG Electronics Inc.
    Inventors: Kwang Hyup An, Hwan Joo Myung, In Seop Lee
  • Patent number: 6494039
    Abstract: Provided is a force-controlled hydro-elastic actuator, including a hydraulic actuator, having a connection to hydraulic fluid and including a mechanical displacement member positioned to be mechanically displaced by fluid flow at the actuator. A valve is connected at the hydraulic actuator connection and has a port for input and output of fluid to and from the valve. At least one elastic element is provided in series with the mechanical displacement member of the hydraulic actuator and is positioned to deliver, to a load, force generated by the hydraulic actuator. A transducer is positioned to measure a physical parameter indicative of the force delivered by the elastic element and to generate a corresponding transducer signal. A force controller is connected between the transducer and the valve to control the valve, based on the transducer signal, for correspondingly actuating the hydraulic actuator and deflecting the elastic element.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: December 17, 2002
    Assignee: Massachusetts Institute of Technology
    Inventors: Gill A. Pratt, David W. Robinson
  • Patent number: 6492748
    Abstract: A linear suspension element having preloaded legs that reduce fretting and maximize stroke within allowable stress limits. Also, a reciprocator and suspension including the linear suspension element.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: December 10, 2002
    Assignee: Clever Fellows Innovation Consortium, Inc.
    Inventor: John A. Corey
  • Patent number: 6453545
    Abstract: Radial pressure is applied to a turbine generator armature bar using a simple hand held device that can be readily manipulated by a single human operator. A retainer platform has two wedge shaped portions with handles, and by the operator sliding the wedge shaped portions with respect to each other the operative width of the platform may be adjusted, including to slide and lock the platform in a conventional dovetail slot in a stator. An inflatable bladder is positioned on or mounted to the top surface of the platform and is dimensioned so as to apply radial pressure (for example through a filler) to armature bars mounted in the stator. A conduit, preferably having a valve with quick-release actuator in it, extends from the inflatable bladder and connects to a source of gas under pressure.
    Type: Grant
    Filed: December 6, 2000
    Date of Patent: September 24, 2002
    Assignee: General Electric Company
    Inventors: Kenneth John Hatley, Sean Michael McDonnell, Alan Michael Iversen
  • Publication number: 20020117049
    Abstract: A pneumatic motor includes a cylinder and a piston movably received in the cylinder. The cylinder includes a first end cover and a second end cover respectively attached to the opposite ends of the cylinder. An inlet port is defined in the first end cover and an outlet port is defined in the second end cover. The piston divides the cylinder into two chambers. An exhaust passage is defined in the piston and communicates with the two chambers. A cavity is defined in the first end cover to receive a shock absorber, and a path is defined to communicate with the cavity and the inlet port in the first end cover. The shock absorber mounted in the cavity in the first end cover cushions the striking force when the piston strikes the first end cover.
    Type: Application
    Filed: February 26, 2001
    Publication date: August 29, 2002
    Inventor: Ta-Chin Wang
  • Patent number: 6347518
    Abstract: A pedal simulator utilizing springs to provide a brake pedal with a non-linear, progressively increasing response characteristic for pedal travel versus force exerted on the brake pedal similar to a conventional hydraulic braking system. In a preferred embodiment, the pedal simulator is integrated into the housing of an associated master cylinder. The non-linear, progressively increasing response characteristic is provided in one embodiment by a conical spring having a non-uniform helix angle. In second and third embodiments, the non-linear, progressively increasing response characteristic is provided by a plurality of cylindrical coil springs.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: February 19, 2002
    Assignee: Kelsey-Hayes Company
    Inventors: Andrew W. Kingston, Salvatore Oliveri, Robert L. Ferger, Thomas Weigert, Peter Every
  • Patent number: 6272971
    Abstract: The invention concerns a connecting rod for a hermetic refrigerating compressor, in which the connecting rod forms the mechanical connection between a crank and a piston. The purpose of the invention is to reduce wear in the crank bearing of the compressor with simple means. This is obtained by reducing compressive stresses in the connecting rod by making a cut-out in the connecting rod near the crank bearing. The cut-out causes deflection of compressive stresses, so that they are distributed over a larger share of the crank bearing surface. Also the outer shape of the connecting rod is adapted, so that also here the compressive stresses are distributed over a larger bearing surface. This reduces the wear on the crank bearing of the compressor and increases the life.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: August 14, 2001
    Assignee: Danfoss Compressors GmbH
    Inventors: Jan Thomsen, Peter Hansen
  • Patent number: 6164188
    Abstract: A reciprocating pump or compressor has an alignment adapter for providing a self-aligning piston rod. The alignment adapter and a clamp couple the piston rod to a crosshead extension rod. The alignment adapter provides compensation for misalignment of the longitudinal axis of the crosshead extension rod with the longitudinal axis of the piston rod. The alignment adapter has a hemispherical cavity, and the piston rod has a hemispherical projection that matingly fits within the hemispherical cavity. A split ring is received in a groove in the piston rod, and the piston rod and the split ring are received in the cavity in the alignment adapter for use in coupling the piston rod to the alignment adapter. A piston head has a hemispherical cavity for receiving a hemispherical projection on a piston rod. The piston head has a longitudinal midpoint, and the hemispherical projection has a focal point for a radius of curvature.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: December 26, 2000
    Inventor: H T Miser
  • Patent number: 6113304
    Abstract: A coupling for a high pressure fluid seal assembly is shown and described. The coupling includes a first member having first and second opposite ends and capable of motion along a first axis extending between the first and second ends. The first member has an engagement portion positioned toward the first end having a rounded convex engagement surface. The coupling further includes a second member also having first and second opposite ends and capable of motion along a second axis extending between the first and second ends of the second member. A second engagement portion toward the second end of the second member has a substantially flat second engagement surface engaging the first engagement surface of the first member. The interface between the first and second engagement surfaces aligns motion of the first member along the first axis with motion of the second member along the second axis. The coupling accordingly reduces the tendency for either the first or second member to bend.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: September 5, 2000
    Assignee: Flow International Corporation
    Inventors: Olivier L. Tremoulet, Jr., Chidambaram Raghavan
  • Patent number: 5996468
    Abstract: A piston-cylinder unit for a hydraulic system, especially for the actuation of clutches in motor vehicles, comprises a housing with an axially stepped bore hole in which a piston fastened to a tappet is guided so as to be axially displaceable. The piston displaces a fluid in the cylinder of the housing by its front end. The cylinder includes at least one pressure line connector, a connection to a fluid chamber, and at least one cup which is sealingly arranged in the housing relative to the outer surface of the piston. Both the housing and the piston comprise assemblies made of a plurality of parts. The assemblies are constructed by inserting the plurality of parts in order into a larger part and press fitting them in place.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: December 7, 1999
    Assignee: Mannesmann Sachs AG
    Inventor: Wolfgang Grosspietsch
  • Patent number: 5992222
    Abstract: A pump system for producing high and exactly controllable pressure levels includes a piston pump which has a piston (32) connecting to a spindle shaft (22), a spindle nut (44) on said spindle shaft, a cylinder block (34) having a bore (36) for receiving said piston, a mechanism (14, 16, 26) for imparting relative rotational and axial motions between said piston and said cylinder block including a device for causing relative rotary motion of said spindle and spindle nut. A helical spring (46) or other resilient element is connected between said cylinder block (34) and said spindle nut (44) to compensate the reaction force generated by a pressurized fluid sample in said cylinder bore (36) when put under compresion. A flexible element (30) is connected between the piston (32) and the spindle shaft (22) to compensate for any axial misalignment of the piston and the cylinder bore. Methods for operating such a system under adiabatic, isothermal, isobaric and isochoric conditions are described. (FIG. 3).
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: November 30, 1999
    Assignee: UHP Corp.
    Inventors: Vladimir Belonenko, Eugenij Bunau, Theodor Funck, Vijcheslav Nikolashev
  • Patent number: 5944627
    Abstract: A replacement mechanism or servo assembly for applying a band to an input member of an automatic transmission includes a housing in which an apply piston is located and to which an apply pin is connected. The piston is sealably movable in the housing and includes a major piston member having a first distal reaction face and a minor piston member integral with the major piston and having a second distal reaction face. A pressure fluid distribution device applies a working fluid against both of the first distal reaction face and the second distal reaction face in order to move the piston with the resultant force of the pressures on both reaction faces and to cause the apply pin to move toward the band to compress the band about the input member with this resultant force. In a preferred embodiment, the housing further includes a pressure separator immovably disposed between the first distal reaction face and an adjacent second proximal face of the minor piston member.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: August 31, 1999
    Assignee: Sonnax Industries, Inc.
    Inventors: Douglas L. Darling-Owen, Scott C. Jackson
  • Patent number: 5938416
    Abstract: A liquid transfer pump includes a housing having an inner space, a cross head disposed in the inner space of the housing and attached to a driving mechanism to reciprocate inside the housing, a plunger attached to and held by a plunger holder of the cross head, and a pump head situated near the cross head. The pump head includes a pump chamber with an inlet path and an outlet path, and the plunger is disposed in the pump chamber to be reciprocated therein together with the cross head. A resilient O-ring is disposed in the plunger holder, and a plunger seal is disposed in the pump head, wherein one side of the plunger is engaged with and held by the resilient O-ring and the other side of the plunger is engaged with and held by the plunger seal. Accordingly, the plunger can be flexibly supported by the O-ring and the plunger seal. The plunger seal can be used for a long time without leakage.
    Type: Grant
    Filed: March 4, 1998
    Date of Patent: August 17, 1999
    Assignee: Shimadzu Corporation
    Inventors: Katsuhiko Saito, Katsuaki Kaito
  • Patent number: 5842405
    Abstract: The present invention relates to an eccentric arrangement for a reciprocating piston pump, having a drive shaft drivable by a drive device, an eccentric part of a rubber-elastically deformable material is disposed on the drive shaft in a manner fixed against relative rotation. A bearing ring is provided on an outer circumferential surface of the eccentric part, by which ring a reciprocating piston is displaceable driven substantially perpendicular to the drive shaft. To avoid stroke losses, first and second support faces are provided on the drive shaft which the eccentric part disposed between them in such a way that the eccentric part rests with its axial ends on the first and second support faces.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: December 1, 1998
    Assignee: Robert Bosch GmbH
    Inventors: Ernst-Dieter Schaefer, Guenter Krenz
  • Patent number: 5839349
    Abstract: A reduced noise radial piston pump with a driving motor for a controlled brake system. The noise reduction is primarily accomplished by locating and orienting the motor/pump bearings with respect to the pump pistons.
    Type: Grant
    Filed: July 19, 1995
    Date of Patent: November 24, 1998
    Assignee: ITT Automotive Europe GmbH
    Inventor: Peter Volz
  • Patent number: 5657682
    Abstract: A hose piston is disposed inside a flexible hose which is filled with fluid and movable in any direction upon hydraulic pressure. The rollers of an external device are engaged on the exterior surface of the flexible hose and are located adjacent to the midsection of the hose piston. The fluid pressure inside the flexible hose forces the hose piston to move along a given direction within the flexible hose, which in turn forces the rollers to travel in the same direction. This mechanism can transport the external device along the flexible hose.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: August 19, 1997
    Assignees: Paul Thomas, Semen Sorokotyazh, Arman Sassani
    Inventors: Paul Thomas, Semen Sorokotyazh, Arman Sassani
  • Patent number: 5522214
    Abstract: The use of flexures in the form of flat spiral springs cut from sheet metal materials provides support for coaxial nonrotating linear reciprocating members in power conversion machinery, such as Stirling cycle engines or heat pumps. They permit operation with little or no rubbing contact or other wear mechanisms. The relatively movable members include one member having a hollow interior structure within which the flexures are located. The flexures permit limited axial movement between the interconnected members, but prevent adverse rotational movement and radial displacement from their desired coaxial positions.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: June 4, 1996
    Assignee: Stirling Technology Company
    Inventors: Carl D. Beckett, Victor C. Lauhala, Ron Neely, Laurence B. Penswick, Darren C. Ritter, Richard L. Nelson, Burnell P. Wimer
  • Patent number: 5520154
    Abstract: The invention pertains to a fuel injection device operating according to the solidstate energy storage principle, whereby a rotor element carried in a pump housing of an electromagnetically driven reciprocating pump is accelerated almost without resistance, whereby the rotor element stores kinetic energy and impacts on a piston element, so that a pressure impulse is generated in the fuel contained in a closed pressure chamber before the piston element due to the fact that the stored kinetic energy of the rotor element is transferred via the piston element to the fuel in the pressure chamber and whereby the pressure impulse is used for the injection of fuel through a nozzle and whereby the rotor element is carried form-locking on the piston element and the two elements are mutually spring-mounted.
    Type: Grant
    Filed: September 2, 1994
    Date of Patent: May 28, 1996
    Assignee: Ficht GmbH
    Inventors: Wolfgang Heimberg, Wolfram Hellmich, Franz Kogl, Paul Malatinszky
  • Patent number: 5499570
    Abstract: Retaining element fixed within the piston opening which avoid any inadvertant extraction of the piston rod from the piston.The design provides a safe and easy to assemble means for fastening the piston rod within the piston which is capable of absorbing considerable tractive forces of said piston rod through said piston.The retaining member is preferably made of plastic material which resides between the piston rod and the piston.
    Type: Grant
    Filed: November 17, 1994
    Date of Patent: March 19, 1996
    Assignee: ITT Automotive Europe GmbH
    Inventors: Klaus Bergelin, Willi Hartmann, Kurt Saalbach, Peter Low
  • Patent number: 5485777
    Abstract: An abrasion preventing device for a hermetic reciprocating compressor. The device releases the impact generated between the slider and the shell of the compressor, thus to prevent possible abrasion of the contact part between the slider and the shell as well as abrasion of the piston. The device comprises a cylinder and a piston received and reciprocating in the cylinder, an end of the piston having a coupling projection. A shell, which is coupled to the piston, has a coupling projection. A bolt and nuts are used for coupling the piston to the shell by coupling the projections of both the piston and the shell to each other. A spring is provided on a coupling portion between the piston and the shell for absorbing the impact caused by striking of a slider on the shell during an operation of the compressor.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: January 23, 1996
    Assignee: Goldstar Co., Ltd.
    Inventor: Dong-Hyeon Kim
  • Patent number: 5460077
    Abstract: A linear thruster (10) comprises a thruster assembly (15) and a compliant head assembly (100). Thruster assembly (15) includes a housing (20), a pair of guide rods (30) supported by bearings (29) in housing (20), a thrust plate (40) attached below housing (20) to guide rods 30, a power unit, such as pneumatic cylinder (50), and a thrust rod (60). Compliant head assembly (100) includes a translation block (120), a set of first leaf springs (140) supporting translation block (120) above thrust plate (40) such that translation block (120) can move forward and rearward, a compliant head (160), and a set of second leaf springs (180) supporting compliant head (160) from translation block (120) at a position below thrust plate (40) such that compliant head (160) can move left and right due to resiliency of second leaf springs (180) and forward and rearward with movement of translation block (120).
    Type: Grant
    Filed: August 2, 1994
    Date of Patent: October 24, 1995
    Inventor: David W. Swanson