Patents Examined by Mark A. Williamson
  • Patent number: 4995304
    Abstract: An extendable cylinder of elastically variable length and substantially invariable circular cross section is combined with another such extendable cylinder or a movable separating organ to form an operating unit. One of the extendable cylinders of the operating unit is arranged for two or three dimensional motion of a free one end as it extends. For example, symmetric, concentric elastic cylinders between common plates at opposite ends of the cylinders extend together two dimensionally.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: February 26, 1991
    Assignee: Firma Carl Freudenberg
    Inventor: Berthold Daimler
  • Patent number: 4924757
    Abstract: A mechanism for attaching a cylinder head on a hydraulic actuator to a cylinder uses a plurality of segmented, curved rings. The rings engage curved surfaces on a plug portion of the cylinder head and on the cylinder. Shear ring retaining plates position the shear ring segments. The cylinder head has a bearing which defines a bore for rotatably connecting the cylinder head to an external structure. The cylinder head also has a neck which joins the bearing with the cylinder plug. The neck has an enlarged dimension transverse to the bore axis and cylinder axis to minimize reaction forces against the shear ring segments generated by torque exerted against the bearing.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: May 15, 1990
    Assignee: The Boeing Company
    Inventors: Howard F. Keene, Frank M. Wyckoff
  • Patent number: 4905573
    Abstract: A tandem-type vacuum booster having a partition plate providing front and rear chambers with a booster piston and diaphragm in each chamber. A piston boss is slidably supported on the partition plate and a connecting cylinder is formed on the front chamber booster piston. A press plate is provided on the piston boss and the rear booster piston and an end plate of the connecting cylinder are coupled to the piston boss by the press plate and a plurality of bolts disposed around the piston boss with the rear booster piston and diaphragm clamped between the press plate and piston boss. The front ends of the bolts are disposed to come closer to the piston boss axis than the rear ends. The bolt heads are also received in recesses provided in the press plate to prevent relative rotation between the bolts and press plate.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: March 6, 1990
    Assignees: Nissin Kogyo Kabushiki Kaisha, Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yoshihisa Miyazaki, Tsuyoshi Hatada, Kazuo Miyazaki, Takahiro Hachigo
  • Patent number: 4903733
    Abstract: A sliding exhaust brake system installed on a large-sized vehicle. The system comprises a main valve member for opening and closing an exhaust passage and an auxiliary valve mechanism. The auxiliary valve mechanism consists of a support frame of a substantially C-shaped cross section and a liner mounted inside the frame. The liner has tonguelike portions at its both side ends. The tonguelike portions extend under the support frame.
    Type: Grant
    Filed: September 20, 1988
    Date of Patent: February 27, 1990
    Assignee: USUI Kokusai Sangyo Kaisha Ltd.
    Inventor: Ryoichi Suzuki
  • Patent number: 4901627
    Abstract: A hydraulic idling-regulating valve comprising at least two mechanically operated through-flow valves which can be controlled to move alternatively into a flow position and a closure position and which are both closed in a neutral central position. An electromechanical specified-value setting system positions the piston of a hydraulic drive cylinder, which system comprises a hollow shaft that can be rotated by a number of revolutions correlated with the specified value, and an actual-value feedback system is provided which comprises a feedback spindle which is in engagement with an internal thread of the hollow shaft and which performs a number of revolutions correlated with the piston movement. The valve-actuating element is subjected to the same displacements as the specified-value setting shaft.
    Type: Grant
    Filed: May 4, 1988
    Date of Patent: February 20, 1990
    Inventor: Eckehart Schulze
  • Patent number: 4899640
    Abstract: A hydraulic booster has a boost piston (19) which receives the thrust of boost pressure generated in a boost chamber (15) to move the boost piston for urging a master piston (12) of a master cylinder in a brake applying direction. An input member (17) is relatively movably with respect to the boost piston (19). A pressure regulating device has an input directional control valve (22, 45) for allowing or cutting off communication between the boost chamber (15) and an auxiliary power source (14). An output directional control valve (24, 46) establishes or cuts off communication between the boost chamber (15) and a reserve tank (9). The boost piston (19), the input member (17) and the pressure regulating device are arranged inside a housing (1). An input member positioning device brings the rear end of the input member (17) into contact with a stop member (51) which is anchored to the housing (1), when a pedal force is zero for stopping a rearward movement of the input member.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: February 13, 1990
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Teruhisa Kono
  • Patent number: 4899642
    Abstract: The present invention provides a kind of pneumatic combined with hydraulic brake chamber, especially relating to a powerful hydraulic brake chamber which is highly stable, ready to provide high-pressure and high-speed actuation and easy to be assembled, dismantled and maintained powerful hydraulic. Said pneumatic type brake chamber is consisted of the following major parts:______________________________________ a cylinder body, a cylinder cover, a central shaft, a shaft sleeve, a piston, a helical spring, a connecting rod, a coupling device, and an alarm device, ect. ______________________________________in which, the pneumatic mechanism is constructed by said cylinder body, cylinder cover, shaft sleeve, piston and helical spring; the hydraulic mechanism is constructed by said central shaft, shaft sleeve, piston and helical spring; and the connecting mechanism is constructed by said connecting rod and the coupling device.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: February 13, 1990
    Inventor: Chrang-Chuan Hwang
  • Patent number: 4893549
    Abstract: An adjustable axial piston machine having a bent axis design having a cylindrical drum rotatably supported on a swivel carriage which has a pair of channels formed therein. One channel is connected with a fluid feed channel and the other channel is connected with a fluid discharge channel. The cylindrical drum is connected to a rotatable shaft and has a plurality of pistons located in cylinders formed in it. A housing for the swivel carriage has a concave guide surface for the face of the swivel carriage facing the guide surface. Support pistons are pivotably connected at one end to the machine housing and supported on the swivel carriage. A plurality of pairs of counteracting servo pistons adjust the position of the support pistons and the cylindrical drum to modify the length of the stroke of the pistons located within the drum.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: January 16, 1990
    Assignee: Linde Aktiengelsellschaft
    Inventor: Franz Forster
  • Patent number: 4892029
    Abstract: This relates to a positioning device for positioning a member relative to a work piece. In the preferred use of the positioning device, a sealing head is carried by the positioning device with the sealing head having a first lowered position for picking up a lid for a container and a second lowered position for positioning the lid and thereafter bringing the lid into pressure engagement with an associated container and effect the heat sealing of the lid to the container. The positioning device includes an extensible fluid motor of the piston and cylinder type which is mounted within a guide sleeve for selective vertical positioning by way of a cam follower and cam track and which extensible fluid motor is further selectively extensible so as to further move an associated member carried thereby downwardly and into resilient clamping engagement with the work piece.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: January 9, 1990
    Assignee: Continental Can Company, Inc.
    Inventor: John Walter
  • Patent number: 4891941
    Abstract: A stored energy-type propulsion system for a vehicle employing a free piston engine-pump hydraulically connected to a drive motor, which in turn connects to the vehicle wheels. The hydraulic connection between the engine-pump and the drive motor includes a large-capacity pressure accumulator which is normally isolated from the system, and which is opened for communication with the system to supply pressure fluid to the drive motor only under conditions demanding peak operating pressure for limited time durations. An auxiliary accumulator of significantly smaller capacity is also connected to the hydraulic connection.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: January 9, 1990
    Inventor: Richard P. Heintz
  • Patent number: 4890541
    Abstract: A fluid-operated actuator for collets, vises, chucks and other workpiece engagement devices, for example, the actuator having a piston which moves the engagement device toward the workpiece with a force equal to product of the area of the face of the piston times the pressure of a fluid applied to the face. When the engagement device has engaged the workpiece, additional, relatively slight movement of the piston causes a force multiplying mechanism to provide increased engagement force without increasing the pressure of the actuating fluid. The overall travel of the actuator mechanism is not limited by the force-mulitplying mechanism which begins to function only after the unrelated distance of travel of the engagement device to the workpiece. Thus, for example, compressed air at ordinary shop pressures may be used to actuate collets or chucks on automatic lathes or the like to provide relatively high clamping forces.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: January 2, 1990
    Inventor: Richard C. Spooner
  • Patent number: 4890538
    Abstract: The invention relates to a brake cylinder suitable for a hydraulic vehicle brake system, having at least one brake chamber and a brake booster, actuatable by a piston rod, with a brake valve assembly that has an inlet and an outlet for power brake fluid and communicates with a pressure chamber of the brake booster. The pressure chamber is located in a longitudinally bored housing section and is defined in the axial direction by one end of a sealed and displaceable sheath and of a rod that is sealed and displaceable within the sheath. The sheath and rod form two servo pistons for generating brake pressure in the brake chamber. The rod is displaceable in an emergency by means of the coaxially aligned piston rod. In a space-saving manner, the brake valve assembly is built into the rod and piston rod.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: January 2, 1990
    Assignee: Robert Bosch GmbH
    Inventors: Georg Kehl, Heinz Siegel
  • Patent number: 4889034
    Abstract: A pneumatic reciprocator includes a cylindrical air cylinder concentrically mounted within a cylindrical manifold. A cylindrical sleeve valve is concentrically mounted for movement along the manifold by a pair of spaced O rings. Two sets of circumferentially arranged air holes in the manifold are alternately covered and uncovered by the O rings as the sleeve valve is moved to selectively pressurize and vent opposite sides of the piston in the air cylinder. Movement of the sleeve valve is controlled by stops on the movable bed of a surface grinder that is controlled by the air cylinder.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: December 26, 1989
    Inventor: Royce H. Husted
  • Patent number: 4889036
    Abstract: A speed-reducing valve assembly is provided in an air passage through which compressed air is discharged when a pneumatic actuator is decelerated. The speed-reducing valve assembly comprises a three-way valve actuated by a signal generated when the actuator has reached the point where deceleration is started, a relief valve through which the compressed air in the passage is let out when the air pressure has reached the preset level, and a check valve that allows only the admission of compressed air into the same passage. The signal-actuated three-way valve brings the air passage of the actuator into communication with the passage in which the relief valve and check valve are provided. When the signal generated when the actuator has reached the deceleration starting point is fed to the speed-reducing valve assembly, the exhaust passage of the actuator communicates with the relief valve and check valve.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: December 26, 1989
    Assignee: SMC Corporation
    Inventors: Akihisa Yoshikawa, Masamichi Tajima, Watanabe Kunio, Toshiharu Sato
  • 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: 4887513
    Abstract: The present invention teaches a brake cylinder which is formed by a cylindrical housing and a cylinder base. The cylindrical housing and cylinder base are joined together by a bayonet connection and form a pressure chamber. The bayonet connection is designed pressure-tight, and it is located on the pressurized-side of a circular sealing element which seals off the cylinder base from the cylinder housing. The bayonet connection is thereby protected from the entry of detrimental environmental influences, especially dirt and moisture, and it can still be easily disassembled at all times.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: December 19, 1989
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Jurgen Ewald, Josef Frania, Roland Glogowschek
  • Patent number: 4887515
    Abstract: A hydraulic cylinder apparatus is used by connecting an external pressure source with extension and contraction-side liquid chambers defined by a cylinder, a piston sliding in the cylinder and a piston rod integral with the piston. The apparatus includes seal members provided with the extension and contraction-side liquid chambers and formed to enable liquid to leak through clearances between the seal members and the parts disposed opposite to the seal members. Liquid leaked from the extension and contraction-side liquid chambers is received by a receiving chamber which is formed so as to change its volume with the movement of the piston rod.
    Type: Grant
    Filed: September 21, 1988
    Date of Patent: December 19, 1989
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masaaki Tabata
  • Patent number: 4887516
    Abstract: A diaphragm clamping arrangement for assembly of a diaphragm-type piston in the body of a valve device or the like such that the diaphragm is biased in a direction to cause the diaphragm convolution to assume a preferred disposition in which a desired diaphragm "spring effect" is maintained.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: December 19, 1989
    Assignee: American Standard Inc.
    Inventors: Daniel G. Scott, Theodore B. Hill
  • Patent number: 4887517
    Abstract: A master cylinder comprising a cylinder body having a bore, a plunger in the bore, a bearing secured to the rear end of the cylinder body and slidably supporting the plunger, a sleeve fitted in the cylinder bore adjacent to the bearing and receiving the plunger therein, and stopper means between the sleeve and plunger for defining a retreat limit of the plunger, wherein the cylinder body is connected to a booster shell with a sealing member therebetween, and the rear end of the plunger protrudes into the booster shell for connection to an output rod of the booster, the sealing member having a lip placed in close contact with the outer peripheral surface of the plunger. An annular set screw is threadedly mounted to the rear opening of the cylinder bore to fix the sleeve while surrounding the plunger, so that the lip of the sealing member is received in a tool-engaging recess provided on the set screw. Alternatively, the plunger comprises a front plunger and a rear plunger.
    Type: Grant
    Filed: January 26, 1988
    Date of Patent: December 19, 1989
    Assignee: Nissin Kogyo Kabushiki Kaisha
    Inventor: Takayoshi Shinohara
  • Patent number: 4885981
    Abstract: A reversible spring return cylinder actuator having a pair of piston rods extending from a common spring load piston to the exterior of the housing. In a non-pressure position of the piston, one of the piston rods extends further from the housing than the other. Either piston rod and either end of the housing can be mounted to a device to be actuated so that the same actuator can be used to define a non-pressure extend or retracted actuator without disassembly of the actuator.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: December 12, 1989
    Assignee: General Signal Corporation
    Inventors: William J. Roettger, Douglas Y. Tanner