Additional Guide Is Spaced Chamber End Wall Patents (Class 92/166)
  • Patent number: 11192641
    Abstract: Landing gear for an aircraft, the landing gear having at least one pair of shock absorbers comprising a first shock absorber and a second shock absorber, each shock absorber comprising a cylinder defining an inside space and a rod carrying a piston, the inside space being subdivided at least into a “primary” chamber and into a “secondary” chamber, the shock absorber including at least one throttling orifice putting the secondary chamber into fluid flow communication with the primary chamber. The primary chamber of the first shock absorber is connected to the secondary chamber of the second shock absorber of the pair by a first pipe, and the secondary chamber of the first shock absorber of the pair is connected to the primary chamber of the second shock absorber of the pair by a second pipe.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: December 7, 2021
    Assignee: AIRBUS HELICOPTERS
    Inventors: Pierre Prud'Homme-Lacroix, Patrice Garcin
  • Patent number: 11192636
    Abstract: An actuation system for a control surface of an aircraft includes a drive lever. The drive lever includes a coupling end configured to pivotably couple to a plurality of wing attach fittings and a lever end. The lever end includes a first actuator fitting configured to pivotably couple to a first actuator on a forward side of the drive lever; a second actuator fitting configured to pivotably couple to a second actuator on an aft side of the drive lever; a first drive link fitting configured to couple, via a first drive link, to a control surface of an aircraft; and a second drive link fitting configured to couple, via a second drive link, to the control surface of the aircraft.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: December 7, 2021
    Assignee: THE BOEING COMPANY
    Inventors: Bret Alan Bowers, Scott Thomas Evoy
  • Patent number: 11149761
    Abstract: One object is to reduce a weight of a fluid actuator. The fluid actuator includes: a cylinder having an inner space and a first mounting portion, the inner space being partitioned into a first fluid chamber and a second fluid chamber, the first mounting portion being disposed on an end portion of the cylinder on an axial direction A side; and a piston rod configured to reciprocate in accordance with pressures in the fluid chambers. A wall portion defining the first fluid chamber in the cylinder is made of an iron-based alloy. A wall portion defining the second fluid chamber in the cylinder is made of an aluminum alloy. The piston rod is made of an iron-based alloy.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: October 19, 2021
    Assignee: NABTESCO CORPORATION
    Inventors: Koji Ito, Keigo Futamata
  • Patent number: 10982665
    Abstract: A valve for a reciprocating pump includes a housing, a first chamber, a second chamber, a first valve element, and a second valve element. The housing includes an inlet and an outlet. The first and second chambers are within the housing. The first chamber includes a first valve seat and is fluidly connected to the inlet. The second chamber includes a second valve seat and is fluidly connected to the outlet. The first valve element is disposed in the first chamber and includes a spring-loaded check valve element. The second valve element is disposed in the second chamber and includes a buoyant material.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: April 20, 2021
    Assignee: Graco Minnesota Inc.
    Inventor: Timothy S. Roman
  • Patent number: 10295059
    Abstract: Cylinder for an actuator (11), in which said cylinder (10) comprises at least a liner (13) of a tubular shape developing along a longitudinal axis (X), a head portion (14) and a bottom portion (15), each disposed at one of the ends of the liner (13), and longitudinal tie rods (21) connected, externally to the liner (13), both to the head portion (14) and to the bottom portion (15); the longitudinal tie rods (21) are distanced with respect to each other on the circumference of the liner (13), they are made of a composite material formed by reinforcement fibers located in a matrix of binder material and wound between the head portion (14) and the bottom portion (15) according to a predominant orientation substantially parallel to said longitudinal axis (X), and have a continuous annular shape defined by two longitudinal branches (21a) connected by two opposite connection portions (21b, 21c).
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: May 21, 2019
    Assignees: CIFA S.P.A., RI-BA COMPOSITES S.R.L. CON UNICO SOCIO
    Inventors: Nicola Pirri, Andrea Bedeschi, Paolo Dario Maini
  • Patent number: 9638323
    Abstract: The invention relates to a cylinder housing (2) for a pressure cylinder (1) of light-weight/hybrid construction, having a support structure (4) comprising an inner tube (6) with ends (7, 8) that are spaced apart in the axial direction, and a first and a second end piece (10, 11) in the region of one of the ends (7, 8) of the inner tube (6). A composite structure (12) made of a fiber-reinforced plastics material is arranged on an outer surface (13) of the inner tube (6). Arranged on an outer surface (16) of the first and the second end piece (10, 11) in each case in a manner distributed over the circumference thereof are a plurality of rod-like winding aids (17) that protrude from the outer surface (16).
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: May 2, 2017
    Assignee: MARK Hydraulik GmbH
    Inventors: Gottfried Braun, Rudolf Mark, Martin Fiedler
  • Patent number: 9353774
    Abstract: A fluid is supplied and discharged to and from a cylinder. A body portion is fixed to a fixed-side structure, and the cylinder is provided integrally with the body portion. A piston defines a cylinder chamber inside the cylinder and slides on an inner wall of the cylinder. A rod is provided integrally with the piston and is displaced so as to extend from and contract into the cylinder. A link member is installed parallel to the axial direction of the cylinder or installed so as to extend obliquely to a direction parallel to the axial direction of the cylinder, and a first end of the link member is pivotably connected to a movable-side structure. A connecting member is fixed to the rod, and a second end of the link member is pivotably connected to the connecting member.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: May 31, 2016
    Assignee: NABTESCO CORPORATION
    Inventors: Koji Ito, Masanori Hirai
  • Patent number: 8109491
    Abstract: A vibration damper, comprising a damping medium-filled cylinder, in which a piston rod is guided with freedom of axial movement, where, inside a working space in the cylinder, a stop spring in the form of a circular ring is located, which, after the piston rod has reached a defined stroke position, is compressed between a stop surface on the piston rod side and an end surface forming an axial boundary of the working space, and where the stop spring also forms a boundary of a radially inner space, which is connected to the working space outside the stop spring by means of at least one radial channel. The stop surface on the piston rod side and/or the axially limiting end surface is formed by a rigid body and is provided with at least one radial channel, which extends from the radially inner space to the radially outer working space, “inner” and “outer” being defined with respect to the stop spring.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: February 7, 2012
    Assignee: ZF Friedrichshafen
    Inventors: Günther Handke, Hans Gonschorrek
  • Patent number: 7421782
    Abstract: A method is provided for efficiently manufacturing a high quality internal combustion engine piston having an annular cavity allowing for good circulation of cooling fluid. An annular groove is formed at the circumferential edge of the top face of a piston crown, or at the top of the exterior circumferential face of the crown, and an annular protruding strip is formed as a continuation of an edge of the opening of the annular groove. The protruding strip is bent in the direction of the opening of the annular groove by bringing to bear a pressure roller 11, while rotating the main piston body. Consequently, the opening of the annular groove is closed, whereby an annular cavity for circulating cooling fluid is formed so as to surround a pressure receiving recess.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: September 9, 2008
    Assignee: Riken Forge Co., Ltd.
    Inventor: Hideki Otaka
  • Patent number: 7343849
    Abstract: A piston, which is provided in a cylinder tube, is connected to a pair of guide rods by the aid of a plate. The guide rods are arranged displaceably in the axial direction along guide holes of the cylinder tube. The displacement of the piston is guided by the guide rods. The guide holes are communicated with the outside via a tube connected to an air hole. The air is sucked into and discharged from the guide holes via the tube in accordance with the reciprocating motion of the piston.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: March 18, 2008
    Assignee: SMC Kabushiki Kaisha
    Inventor: Tsuyoshi Asaba
  • Patent number: 6454241
    Abstract: A gate valve in which the structure is simplified and inexpensive, movement of a valve body is smooth and high in speed, a force of inclination moving the valve body is strong, and a sealing property of an opening portion can be improved. The gate valve has a valve body capable of sealing the opening portion; a valve rod to which the valve body is fixed; a roller rotatably provided on the other end portion of the valve rod; a roller receiving member having a first holding portion for holding the roller when the valve rod moves the roller straight, an inclined surface for inclining the valve rod, and a second holding portion for holding the roller when the valve rod is inclined up to a predetermined angle; a driving means for moving the roller receiving member straight; and stoppers limiting the straight movement of the valve rod at predetermined positions at which the valve body closes the opening portion. This gate valve is preferably driven by the cylinder apparatus.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: September 24, 2002
    Assignee: NOK Corporation
    Inventors: Yuzuru Tamura, Isamu Kinno
  • Patent number: 5974948
    Abstract: A piston and cylinder assembly for use in actuating a locating pin for sheet metal provides stability for a pin mounted thereon against side to side movement and rotation. To this end the assembly includes a cylinder body assembly with an internal bore and a piston axially slidable within the bore. A piston rod is connected with the piston, and the rod has a free end for connection of a sheet metal locating pin. A first guide surface is formed within the cylinder body assembly and a second guide surface is formed on one of the piston and piston rod, the first and second guide surfaces cooperating to prevent rotation of the piston and piston rod as the piston and piston rod slide axially with respect to the cylinder body assembly. The first and second guide surfaces preferable are internal and external splines. First and second bearings are connected to the cylinder body assembly and support the piston rod for straight line movement. The first and second bearings being located on opposite sides of the piston.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: November 2, 1999
    Assignee: Zaytran, Inc.
    Inventors: Brian K. Thompson, Theodore S. Zajac, Jr., Theodore S. Zajac, Sr.
  • Patent number: 5806314
    Abstract: A pressure-driven cylinder having a piston sliding within a sealed housing chamber between a pair of opposed side-end walls in a piston chamber. At least one chamber wall has a moveable portion of an end wall integrally connected to and axially spaced away from a pressure-driven face of the piston by an integral connector point that is much smaller in area than the piston's pressure face. That moveable wall portion acts as an integrally connected piston follower that has its own extended surface area that is progressively introduced into the presure chamber as the piston slides in order to reduce the required volume of pressurized driving fluid in the piston chamber. A chamber for the follower itself is sealably isolated from the piston chamber so that no driving fluid backs into the follower chamber. Both the end wall/follower and the piston reciprocate together.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: September 15, 1998
    Assignee: Joseph F. Younes
    Inventor: Joseph F. Younes
  • Patent number: 5778760
    Abstract: A multiple piston and cylinder assembly is illustrated utilizing first and second transversely bifurcated segments (A) and (B) for retention by an intermediate snap ring (D) installed within a single groove (C) facilitating a sealing abutting relation between the segments utilizing a sealing and retaining member (E) wherein the segments are inserted from opposite ends of the cylinder.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: July 14, 1998
    Inventor: Lawrence F. Yuda
  • Patent number: 5701801
    Abstract: In a mechanically redundant actuator system, the actuator has a structurally redundant members for attaching it between a stationary anchor point to a movable control surface. Specifically the actuator consists of a cylinder body, a double action piston with a piston rod attached to the control surface at one end and a swivel bar at the other end. Single or multiple tie rods are attached between the swivel bar and the movable control surface. Each tie rod can withstand one half the load of the piston rod. Also, trunnion links attach the cylinder body to the structure. Each trunnion links can withstand the full limit load with or without any load factors. The trunnion fittings can be any configuration that provides a structural reaction, and provides a dual load path and freedom of movement in at least two axes. At least two of these actuator units are required per surface. Also, a dual tandem control valve with a hydraulic compensator for each actuator is required.
    Type: Grant
    Filed: October 18, 1995
    Date of Patent: December 30, 1997
    Assignee: McDonnell Douglas Corporation
    Inventors: Wilfred E. Boehringer, Teunes Verhoeven, William V. Hutz
  • Patent number: 5564993
    Abstract: A roller-control unit for a continuously-variable-ratio transmission of the toroidal-race rolling-traction type, in which the roller carriage (10, 14) is connected by a pivotal joint (30) to the piston (15) of a hydraulic piston-and-cylinder unit (15, 16). The piston (15) is double-acting, and the piston/cylinder contact is the only locus through which the roller carriage (10, 14) makes contact with the fixed structure of the transmission. The piston (15) may have an inner part (32) to which the roller carriage (10, 14) is jointed, and a sleeve-like outer part (33, 34) which makes the necessary sliding and sealing contacts with the cylinder (16), but allows the roller carriage (10, 14) the necessary freedom of pivoting movement during use.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: October 15, 1996
    Assignee: Torotrak (Development) Limited
    Inventor: Leslie K. Robinson
  • Patent number: 5547352
    Abstract: The pump is formed by a body having a cavity with a cylindrical chamber in which a piston is reciprocated toward and away from an inlet and outlet aperture. A crank shaft extends through an aperture formed through the piston transverse to its axis and through opposite walls of the cavity. The crank shaft has a cam located in the piston aperture. Upon rotation of the crank shaft, the cam alternately engages opposite facing cam surfaces of the piston in the piston aperture to reciprocate the piston to draw fluid into the chamber from an inlet path and then to pump the fluid out through an outlet path. The piston has spaced apart O-rings on its outer wall which engage the chamber wall upon reciprocation of the piston.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: August 20, 1996
    Inventors: Darrel D. Hillman, Charles T. Russell, Jr.
  • Patent number: 5495792
    Abstract: Disclosed is a double piston rod type hydraulic cylinder having a pair of pressure chambers containing piston rods that reciprocate in response to changes of the pressure of hydraulic fluid contained in both pressure chambers. This hydraulic cylinder is used in, for example, a rear axle steering cylinder for industrial vehicles utilizing hydraulic power steering. Bushings are provided between the piston rod and a pair of rod guides that permit the sliding of the piston rod. Oil grooves are formed in the inner surfaces of the rod guide to connect oil inlet ports to the pressure chambers.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: March 5, 1996
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Akira Izumi, Toshiyuki Takeuchi
  • Patent number: 5471909
    Abstract: A fluid cylinder, particularly for steering a marine outboard motor, has a tubular body portion, and a piston rod and a piston movable relative to the body portion. First and second end plugs engage open end portions of the body portion and at least one end plug has an opening to receive the piston rod passing therethrough. First and second end caps enclose the first and second end plugs and open end portions of the body portion respectively, and retainers, e.g. bars, cooperate with the end caps to retain the end caps on the body portion. A seal is provided in a seal groove on an outer surface of the said one end plug, and a flat washer is located adjacent the outer face of the plug and has a clearance opening to receive the piston rod passing therethrough. An inner surface of the washer engages the seal and an outer surface of the end plug, and an outer surface of the washer is engaged by the first end cap.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: December 5, 1995
    Inventor: Jacob Kobelt
  • Patent number: 5417144
    Abstract: Power transmission device for linear movement, comprising a principal member (2), which is movable along a displacement path, and a housing (1) which presents bearing means (10) for the movement of the member along the displacement path. A guide member (3) is arranged to guide the principal member in its displacement path, and a power member (4) is arranged to be able to be activated to apply a force to the principal member so that it moves while being guided by the guide member. A portion of the principal member is arranged to drive a connected device. The principal member (2) and the housing (1) and suitably also the power member (4) are each formed from longitudinally extending sections or profiles with essentially constant cross-sections along their lengths. In this manner the power transmission device can be produced in various lengths from a basic embodiment by cutting said profiles from raw material profiles having the cross-section referred to.
    Type: Grant
    Filed: August 6, 1993
    Date of Patent: May 23, 1995
    Inventor: Tom Petterson
  • Patent number: 5341725
    Abstract: A power cylinder (10) has two pistons (12, 20) slidably mounted within separate cylinders (14, 22) to define inner and outer chambers (16, 18; 24, 26) within each cylinder. One or more rods (28) are coupled between the pistons. The outer chambers (18, 26) are coupled together to allow pressurized hydraulic or pneumatic fluid to flow therebetween. The inner chambers (16, 24) are coupled together to allow pressurized hydraulic or pneumatic fluid to flow therebetween. The fluid flow aforesaid may be achieved by using two hollow rods (128, 130) and allowing the fluid to flow through the rods between the respective chambers. A guard (44) may surround first and second cylinders (14, 22). Bearings (46, 48) may be fixed around the opposed inner ends of cylinders (14, 22) to allow slidable displacement of the cylinders relative to guard (44).
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: August 30, 1994
    Inventor: James B. Dick
  • Patent number: 5255591
    Abstract: An indexing apparatus (10) having a pair of concentric cylinders (12, 14) with the outer concentric cylinder (12) being fixed against longitudinal movement and the inner cylinder (14) mounted for reciprocal movement relative to the fixed outer cylinder (12). A single ram piston (16) is mounted within the inner cylinder (14) and has a piston rod (18) connected to a member (29) for positioning at four predetermined positions. A shock absorber (24) is carried by the outer fixed cylinder (12) and engages stop plates or abutments (20, 28) carried by the inner cylinder (14) for activation of the shock absorber (24). A pair of guide rods (42) prevent rotational movement of inner cylinder (14) relative to the inner cylinder (12) and maintain the shock absorber (24) in axial alignment with the end abutments (20, 28). In one embodiment (FIGS.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: October 26, 1993
    Assignee: Nathan Gottlieb
    Inventor: Theodore Gottlieb
  • Patent number: 5165322
    Abstract: An assembly for moving objects by mechanical linkages has a power cylinder ith a shoulder at the juncture of a small bore and a large bore and with ports adjacent each end and one adjacent the shoulder. A shaft extends through the cylinder with a larger diameter portion in the smaller bore with a piston thereon sealing against the surface of the smaller bore. A second piston slidably seals on the small diameter of the shaft and against the larger bore, being biased towards the shoulder by a spring. A lost motion device on the end of the shaft projects outwardly of the smaller bore end of the power cylinder and has a housing with a chamber in which the end of the shaft is slidable against a spring which biases it outwardly of the housing.
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: November 24, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Paul E. Moody
  • Patent number: 5098071
    Abstract: A compressed gas and a liquid are contained in a cylinder. A liquid chamber containing the liquid and a gas chamber containing the gas are divided by a metallic bellows. The liquid chamber is situated on the side of an open end of the cylinder. A rod is inserted in the cylinder. A sealing assembly is provided at the open end of the cylinder. The sealing assembly has a bearing member at only one portion of the cylinder with respect to the axial direction thereof. A space extends throughout the circumference between the outer peripheral surface of the inner end of the rod and the inner peripheral surface of the cylinder. A seal device for sealing the liquid in the liquid chamber includes a seal ring intimately in contact with the outer peripheral surface of the rod and an elastomer ring provided on the outer peripheral surface side of the seal ring and capable of elastic deformation in the radial direction of the rod. The rod can swing within the range of an angle .theta.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: March 24, 1992
    Assignee: NHK Spring Co., Ltd.
    Inventor: Chiharu Umetsu
  • Patent number: 5070769
    Abstract: A pneumatic linear vibrator comprises a piston guide sealed on one side and delimited by detachable end parts (14,16), a piston (10), a sound-absorbing pipe (52) which forms the housing, and means for supplying and removing a gaseous or vaporized pressure medium. Relative motion between the guide with the end parts and the piston is ensured by automatic alternating delivery of the pressure medium to a working volume (V,V1,V2) located on one face of the piston. The piston (10) has a longitudinal axial bore (22) with a snap ring groove (26) in the region of the ends of the longitudinal median plane of the piston. The snap ring grooves are connected to a face of the piston (10) by at least two axisymmetric channels (27) which run in the axial direction (A) and are sealed off from the longitudinal axial bore (22) of the piston (10).
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: December 10, 1991
    Inventor: Max Fehr
  • Patent number: 5014602
    Abstract: A hydraulic cylinder that is capable of being set in three positions utilizing a movable cylinder with a fixed main piston and auxiliary pistons slidably mounted within the cylinder. Right and left fluid chambers are defined, within the cylinder, by the main piston and right and left auxiliary pistons respectively.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: May 14, 1991
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventor: Yukio Iwata
  • Patent number: 4940104
    Abstract: A power-assisted steering apparatus of the type which includes a control valve arranged to control hydraulic fluid under pressure supplied to a hydraulic power cylinder from a hydraulic pump therethrough in response to the driver's steering effort applied thereto, the power cylinder having a piston mounted therein for reciprocating movement and a piston rod supporting thereon the piston for movement therewith and extending outwardly from the cylinder in opposite directions. In the steering apparatus, a pair of axially spaced cylindrical reaction pistons are slidably mounted on the piston rod at the both sides of the power cylinder piston in such a manner as to be engageable at their inner ends with a pair of axially spaced internal end walls of the cylinder and at their outer ends with a pair of axially spaced retainer members on the piston rod when the power cylinder piston is retained in a neutral position.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: July 10, 1990
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Akira Hasegawa
  • Patent number: 4939983
    Abstract: A fluid pressure operated positioning apparatus has a cylinder (1), formed as an annular cylinder, with an outer cylinder wall (2) and an inner cylinder wall (3) coaxial with and spaced apart radially from the outer cylinder wall. In the annular cylinder, a piston arrangement including at least one ring piston (8) is slidably guided, its ring piston surrounding the inner cylinder wall and being connected to at least one elongated force transfer element (22) that is extended in a sealed manner out of the annular cylinder.
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: July 10, 1990
    Inventor: Reinhard Lipinski
  • Patent number: 4922805
    Abstract: A fluid actuated cylinder is provided having a piston and piston rod combination disposed in a tubular casing having a nose end and tail end. The piston is disposed on the piston rod spaced from both ends of the rod, the outer end extending through a bearing disposed at the nose end of the casing, and a unitary member which is employed to close the tail end of the casing is provided with a bearing for supporting the inner end of the piston rod.
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: May 8, 1990
    Inventor: Paul R. Beswick
  • Patent number: 4889039
    Abstract: The invention, a high-pressure, reciprocating, gas compressor, employs labyrinths to create gas sealing, annular, air dams between the piston and cylinder bore, and piston rod and an aperture in an end wall or closure of the cylinder through which the rod translates, and active magnetic bearings to maintain the piston and rod at their centroids, equally and minutely spaced, fully thereabout, within the bore and aperture. Too, the drive mechanism, a scotch yoke arrangement, has further, active magnetic bearings, to centralize a drive shaft in its housing, and to effect a non-contacting travel of the drive shaft's offset crank, which translates the piston rod, within the yoke.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: December 26, 1989
    Inventor: Bernard F. Miller
  • Patent number: 4771678
    Abstract: The double acting hydraulic piston and cylinder assembly of the present invention utilizes a unique fastening mechanism for fastening the piston to the cylinder rod. The piston has a rod receiving opening through which the piston rod is fitted. The piston includes a piston groove which is aligned with an annular rod groove in the outer surface of the rod. Extending from the outer circumference of the piston inwardly to the piston groove is an access opening, through which a retaining wire is inserted. The retaining wire is wrapped around the piston rod and fits within both the piston groove and the rod groove so as to hold the piston against longitudinal movement with respect to the rod.The method of the present invention comprises inserting the retainer wire through the access opening in the piston and rotating the piston until the wire wraps around the piston rod.
    Type: Grant
    Filed: November 23, 1987
    Date of Patent: September 20, 1988
    Assignee: Prince Manufacturing Corporation
    Inventor: Jimmie K. Walker
  • Patent number: 4685384
    Abstract: Fluid actuator includes a composite cylinder having circumferential hoop stress windings wrapped about a liner member forming the piston chamber wall, and longitudinal tension windings extending from the outboard end of the cylinder along one side thereof and around the inboard end of the cylinder to the other side and back to the outboard end where they are secured to the cylinder. A compression column of composite material may be provided between a cylinder end wall and a permanent structure mount at the inboard end of the cylinder to extend the length of the cylinder to accommodate a tail stock on the piston of a pressure balanced actuator.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: August 11, 1987
    Assignee: Pneumo Corporation
    Inventors: William Dirkin, Duane Douglass, James N. Tootle, Terry L. Benton
  • Patent number: 4665558
    Abstract: This is a fluid-operated linear-rotary robot-like actuator reconstructed from a standard fluid cylinder device. The solid piston of the standard cylinder device is replaced with a self-contained vane-operated piston structure formed of spaced piston parts and an interposed vane chamber and in which a vane-operated work piston is rotated. The work piston extends through the forward cylinder head. A second piston rod extends from the rear part of the piston structure through the rear cylinder head and has passages for supplying the vane chamber of the piston with fluid under pressure. Suitable push button and microprocessor control systems, either by push button or automatically, are provided for controlling the operation of the actuator to give combined linear and rotary movement to a robot hand.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: May 12, 1987
    Inventor: David W. Burke
  • Patent number: 4602555
    Abstract: Table couplings for coupling hydraulic actuators to large shaking tables, such as earthquake simulator tables are preloaded under gaseous pressure to permit the couplings to be nontension carrying couplings, which in turn permits use of hydrostatic slip bearings between the side surfaces and the bottom surface of the table and the actuators. The hydrostatic bearings in turn reduce the need for swivels, links and yokes that carry both tension and compression. The use of compression only loading such as that permitted with the present device, also reduces the problem of making a satisfactory table foundation, because only compression loads are carried to the foundation rather than alternating tension-compression loads.
    Type: Grant
    Filed: February 1, 1984
    Date of Patent: July 29, 1986
    Assignee: MTS Systems Corporation
    Inventor: John A. Bushey
  • Patent number: 4597322
    Abstract: A seal assembly is arranged to contain leakage of hydraulic fluid passing between a wall opening and a penetrant rod portion passing through the opening. The seal assembly includes a sliding-seal member mounted on a portion of the rod for sliding movement toward and away from an abutment surface and a non-sliding flexible-seal member arranged between the body and the sliding-seal member. The body, flexible-seal member, sliding-seal member and rod define a sealed chamber into which such fluid will leak. The chamber communicates with a fluid reservoir through a oneway check valve. The sliding-seal and flexible-seal members are arranged in parallel with one another. In one embodiment, a spring urges the sliding-seal member to move toward an abutment surface provided on the rod. In another embodiment, movement of the sliding-seal member relative to the body is limited by facing abutment steps.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: July 1, 1986
    Assignee: Moog Inc.
    Inventors: Kenneth D. Garnjost, David J. Flavell
  • Patent number: 4555979
    Abstract: A fluid-powered lift unit having a plurality of pistonrods attached to a piston which translates axially but within a tube. The tube is provided with an end cap and a base which in conjunction with the piston defined two fluid-tight regions. The pistonrods extend from the piston and sealingly extend through the end cap thereby preventing piston rotation and causing the lift unit to be rigid with the piston in the extended or contracted position.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: December 3, 1985
    Inventor: Robert Cetnarowski
  • Patent number: 4523515
    Abstract: In order to enable a piston cylinder unit 1,2 with air entry through a hollow shaft 6, to be operated in either mode of operation with a single type of shaft, it is proposed in accordance with the invention to manufacture the shaft 6 in three parts, namely an upper air inlet portion 6a, an intermediate portion 6b which provides access for air to the cylinder via one or more apertures 18, and an operating end portion 6c. These three parts are threaded together and sealed by seals 21 and 24. Captive nuts 3 and 8 are provided at both ends of the cylinder so that the cylinder may be attached to a yoke 4 by either end, with the opposite end carrying a bearing 9 for the air inlet portion 6a of the shaft. If it is desired for the piston to operate in the opposite mode of operation, the portions 6a and 6c are interchanged and the cylinder is attached to the yoke using the captive nuts 8 rather than the nuts 3.
    Type: Grant
    Filed: December 14, 1982
    Date of Patent: June 18, 1985
    Assignee: APV Company Limited
    Inventor: David A. Smith
  • Patent number: 4522113
    Abstract: A device for accommodating bending a cable or the like by remote control is proposed. It has a cylinder with a piston rod, and two holders coupled to the cylinder and the piston rod at each end thereof. The holders through which a cable runs are bent by remote control by relative movement between the cylinder and the piston rod.
    Type: Grant
    Filed: February 2, 1984
    Date of Patent: June 11, 1985
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Koichi Tsuno
  • Patent number: 4499812
    Abstract: The two chambers (8, 9) on either side of the movable wall structure forming a piston (7) are each sealingly delimited internally by a first and a second flexible impervious walls (23) which connect the central hub part (11) incorporating the control valve (12) to the central annular end zones (22 ; 24) of the corresponding end walls (2 ; 3) of the housing, the central zones delimited peripherally by said flexible walls being interconnected by at least a passage (39) traversing the central hub part, thus providing in the center of the housing a neutral cylindrical zone (32). In this neutral zone (32) there extend force-transmitting elements (38) which have at their ends fastening means (40), for example with assembly flanges (41, 42), and which slidingly pass through said passages (39) formed in the body of the central hub part (11), thus in no way interfering with the control and fluid actuation system of the servo-motor.
    Type: Grant
    Filed: October 7, 1983
    Date of Patent: February 19, 1985
    Assignee: Societe Anonyme D.B.A.
    Inventors: Pierre Pressaco, Jean-Jacques Carre
  • Patent number: 4491060
    Abstract: A cylinder for a valve actuator wherein the cylinder body has lugs connectable to and disconnectable from like cylinder head lugs by less than one turn rotation. Resilient seals seal the head to the body when connected, and the connection is releasably lockable.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: January 1, 1985
    Assignee: Otis Engineering Corporation
    Inventor: Israel Boski
  • Patent number: 4467705
    Abstract: Within a cylinder of a double-acting piston-and-cylinder unit there is displaceably arranged a piston. A spatially moveable piston rod in the form of a universal or ball pivot-link chain is connected with the piston. The piston rod is lengthwise guided by tensioning or tie bolts internally of the cylinder, these tensioning bolts clamping towards one another both of the cylinder heads and piercingly extending through the cylinder. Externally of the piston-and-cylinder unit the piston rod is guided within a guide tube which is connected with one of the cylinder heads. This guide tube can possess a random spatial extent. At the piston rod there is attached a coupling element with which there can be coupled the object or the like which is to be moved. This coupling element extends through a longitudinal slot provided in the guide tube. The spatial mobility of the piston rod enables guiding the piston rod externally of the piston-and-cylinder unit in a random direction.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: August 28, 1984
    Assignee: Feramatic AG
    Inventor: Walter Reist
  • Patent number: 4433614
    Abstract: A highly durable and light-weighted vacuum type brake booster device including a booster shell, a booster piston axially slidably accommodated in the booster shell to divide the interior thereof into a first chamber communicating with a vacuum source and a second chamber adapted to be placed into selective communication through a control valve with the first chamber and the atmosphere, and an input rod operatively connected with the control valve for operating the latter to generate a pressure differential between the first and second chambers. The front and rear walls of the booster shell are connected with each other by means of tie rod(s) which extend(s) through the booster piston with a deformable seal member disposed therebetween. The booster piston is urged in a retracting direction by a return spring disposed in the first chamber.
    Type: Grant
    Filed: June 3, 1981
    Date of Patent: February 28, 1984
    Assignee: Nissin Kogyo Kabushiki Kaisha
    Inventors: Hiroo Takeuchi, Nobuaki Hachiro, Yoshihisa Miyazaki
  • Patent number: 4414881
    Abstract: The invention provides a hydraulic servo-control device which performs the same functions as a conventional device but is much cheaper to manufacture and maintain.For this purpose, the control device comprises a cylinder device formed by a cylinder and a piston rigid with a rod and a hydraulic control unit whose body is rigid with the cylinder. The body of the hydraulic control unit defines a cavity for receiving the cylinder of the cylinder device and this cylinder is made in two main parts, namely a case partly received in the cavity and fixed to the body of the hydraulic control unit, and a tubular sleeve which is axially and radially positioned inside the case and the cavity and cooperates with the piston.Application in particular in the control of the pitch of the blades of a helicopter or the ailerons of a light aircraft.
    Type: Grant
    Filed: January 21, 1981
    Date of Patent: November 15, 1983
    Assignee: Societe d'Applications des Machines Motrices
    Inventor: Gerard L. Devaud
  • Patent number: 4397219
    Abstract: A brake booster for automotive vehicles includes a low-pressure casing which is sealingly subdivided into a low-pressure chamber and a working chamber by an axially movable wall. The low-pressure chamber includes a casing port adjacent the low-pressure chamber and a portion of the splashboard of the automotive vehicle to which the casing part adjacent the low-pressure chamber is secured at an outer annular sealing surface of the portion of the splashboard in a sealed relationship thereto. Located at the portion of the splashboard is an inner annular sealing surface to which the end of a central reinforcement tube for the low-pressure casing adjacent the working chamber is sealingly connected.
    Type: Grant
    Filed: February 5, 1981
    Date of Patent: August 9, 1983
    Assignee: ITT Industries, Inc.
    Inventor: Juan Belart
  • Patent number: 4337691
    Abstract: A valve driving apparatus is provided with cylindrical bearing members made of a synthetic resin or a copper alloy and used for a piston rod and for a drive shaft, a lining member made of a synthetic resin for coating the inner wall of an apparatus and a resilient member made of a synthetic rubber or a synthetic resin and inserted in a groove of a piston so as to protect the valve driving apparatus from the disadvantages of wear, frictional resistance and energy loss which are produced by a reciprocating movement of the piston and the piston rod. Also a valve driving apparatus utilizing a scotch yoke type movement conversion-transmission mechanism is provided with cylindrical bearing members made of a synthetic resin or a copper alloy and attached to pins installed on a piston rod so as to prevent the aforementioned disadvantages from occurring between the pins and the scotch yokes.
    Type: Grant
    Filed: January 3, 1980
    Date of Patent: July 6, 1982
    Assignee: Kitazawa Valve Co., Ltd.
    Inventor: Hisao Tomaru
  • Patent number: 4334459
    Abstract: A light weight brake booster is disclosed having an internal axial tube for transmitting axial forces with a working or boosting piston surrounding the tube and a control piston slideably guide inside the tube. These two pistons are connected by reaction levers extending through longitudinal slots in the tube. The reaction levers are pivotably supported to transmit boosting forces to a master brake cylinder and their inner ends engage the control piston to deliver a reaction force to the brake pedal to give the driver the required "brake feel".
    Type: Grant
    Filed: April 24, 1980
    Date of Patent: June 15, 1982
    Assignee: ITT Industries, Inc.
    Inventors: Peter Riedel, Lucas H. Haar
  • Patent number: 4328738
    Abstract: A vacuum servo booster device includes a housing defined by a front shell and a rear shell, a valve body slidably supported by the rear shell and incorporating therein a valve mechanism, a flexible diaphragm connected to the circumference of the valve body and extending in the radial direction toward the outer circumference of the housing to divide the interior of the housing into a front chamber and a rear chamber, and a piston plate mounted around the valve body and extending contiguous to the diaphragm. The improvement is constituted by at least one rigid connecting rod extending through both chambers and the piston plate and slidingly and sealingly through the diaphragm with the opposite ends thereof being connected to respective shells.
    Type: Grant
    Filed: September 20, 1979
    Date of Patent: May 11, 1982
    Assignee: Tokico Ltd.
    Inventor: Seiji Hamamatsu
  • Patent number: 4291534
    Abstract: A servo booster assembly comprises a housing having a fixed part and a movable part defining a chamber therebetween, a control valve for communicating the chamber alternately with vacuum and ambient air, and an input member movement of which operates the control valve. In response to operation of the control valve the movable housing part moves relative to the fixed part between an inoperative position and an operative, brake-applying position, the movable part being connected to an output member. The housing parts are interconnected by a tie bar the ends of which extend outside the housing and are adapted respectively for connection to a master cylinder and a vehicle bulkhead.
    Type: Grant
    Filed: October 18, 1979
    Date of Patent: September 29, 1981
    Assignee: Lucas Industries Limited
    Inventor: David Jones
  • Patent number: 4286501
    Abstract: In a servo booster in which the rear part of the valve body is slidably guided in a guide in the rear end of the booster housing, the rear part and the guide have non-round cross-sections to prevent the valve body from turning relative to the housing. This is of particular benefit when a tie extends through the movable wall for transmitting braking reaction forces. Such a tie has to be sealed to the movable wall by a suitable seal, and any turning of the movable wall might damage the seal.The interior of the valve body is of circular cross-section so that, due to the non-round external shape, a radially thickened portion of the valve body is formed to carry a fluid conduit.
    Type: Grant
    Filed: July 6, 1979
    Date of Patent: September 1, 1981
    Assignee: Lucas Industries Limited
    Inventors: Alfred W. Thomas, Lutz E. A. op den Camp
  • Patent number: 4255930
    Abstract: A closed circuit power system is disclosed herein having a hydraulic power device incorporated therein which includes an input piston and cylinder assemblage and an output piston and cylinder assemblage connected together by a fluid conduit so as to operate in unison. The input assemblage includes a piston moved by an input ram so as to apply a fluid pressure via the conduit to the output assemblage. The output assemblage includes a pair of pistons operating in unison in separate chambers in response to the applied fluid pressure for moving an output shaft. The pair of pistons include pressure faces against which the fluid pressure is applied which are of equal area but different shape. A selected piston of the output assemblage includes conical forward and rearward faces with a corresponding or matching concave recess in the rear cylinder wall.
    Type: Grant
    Filed: August 10, 1979
    Date of Patent: March 17, 1981
    Inventor: Adam J. Natalie