With Means To Control Flow Of Non-working Arresting Fluid For Working Member Patents (Class 92/8)
  • Patent number: 9162860
    Abstract: A hydraulic cylinder includes a piston that defines a driving pressure chamber and a cushion pressure chamber within a cylinder tube, an air chamber defined inside a hollow piston rod, an orifice that leads a working fluid in the cushion pressure chamber into the air chamber when the cushion pressure chamber contracts during an extension operation, a check valve that returns a working fluid in the air chamber to the driving pressure chamber when a differential pressure between the air chamber and the driving pressure chamber rises to or above a predetermined value, and a valve housing that houses the check valve. A throttle gap is defined between an outer peripheral surface of the valve housing and an inner peripheral surface of the piston rod, and a working fluid ejected from the orifice during the extension operation flows into the air chamber through the throttle gap.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: October 20, 2015
    Assignee: KAYABA INDUSTRY CO., LTD.
    Inventor: Nobuhiro Nakanishi
  • Publication number: 20130340607
    Abstract: A continuously blockable locking device with a cylindrical housing forming a work chamber, a closed first end and a second end located opposite from the closed end, a piston rod which is guided out of the housing in a sealed manner through the second end so as to be arranged coaxial to the center longitudinal axis by means of a guiding and sealing device, a piston which is arranged at the end of the piston rod situated in the housing and which divides the work chamber into a first work space, through which the piston rod extends, and a second work space, and a housing which is connected to, or can be connected to, the housing and which forms a valve chamber, a first valve assembly and a second valve assembly being arranged therein. The work chamber is always completely filled with a liquid medium and the valve chamber is at least partially filled with a liquid medium.
    Type: Application
    Filed: August 22, 2013
    Publication date: December 26, 2013
    Inventors: Frank Born, Frank Doffing, Thomas Klar, Rolf Mintgen, Gerd Müelhoefer, Timo Schumacher, Wilhelm Schwab
  • Publication number: 20130340606
    Abstract: A housing having a first housing end and a second housing end, a substantially cylindrical work chamber formed in the housing, a piston which is arranged in the work chamber so as to be displaceable and which divides the work chamber into a first work space near the first housing end and a second work space near the second housing end, a piston rod which is arranged at one side of the piston and which projects through the first work space and is guided out of the work chamber in a sealed manner at the first housing end through a guiding and sealing device, and a valve chamber which is formed in the housing parallel to the work chamber and in which a first valve assembly and a second valve assembly are arranged. The work chamber is always completely filled with a liquid medium and the valve chamber is at least partially filled with a liquid medium.
    Type: Application
    Filed: August 22, 2013
    Publication date: December 26, 2013
    Inventors: Frank Born, Frank Doffing, Thomas Klar, Rolf Mintgen, Gerd Muelhoefer, Timo Schumacher, Wilhelm Schwab
  • Publication number: 20090293714
    Abstract: A continuously blockable locking device with a cylindrical housing forming a work chamber, a closed first end and a second end located opposite from the closed end, a piston rod which is guided out of the housing in a sealed manner through the second end so as to be arranged coaxial to the center longitudinal axis by means of a guiding and sealing device, a piston which is arranged at the end of the piston rod situated in the housing and which divides the work chamber into a first work space, through which the piston rod extends, and a second work space, and a housing which is connected to, or can be connected to, the housing and which forms a valve chamber, a first valve assembly and a second valve assembly being arranged therein. The work chamber is always completely filled with a liquid medium and the valve chamber is at least partially filled with a liquid medium.
    Type: Application
    Filed: May 28, 2009
    Publication date: December 3, 2009
    Applicant: Stabilus GmbH
    Inventors: Frank Born, Frank Doffing, Thomas Klar, Rolf Mintgen, Gerd Mülhöfer, Timo Schumacher
  • Publication number: 20090205485
    Abstract: The invention concerns a pneumatic retarding device with a cylinder dividing the cylinder into a displacement chamber and a compensation chamber and including a piston with a piston rod movably supported in the cylinder and having a piston seal element wherein, upon movement of the piston, a piston movement opposing force is generated while an air leakage flow is established past the piston for damping piston movement. The piston and the piston rod are formed integrally and the piston seal element has at least two deformation zones of which one responds faster to a pressure change in the displacement chamber then the other which is subjected to the pressure change via a restrictive passage. Also, a guide system is provided with such a retarding device.
    Type: Application
    Filed: March 26, 2009
    Publication date: August 20, 2009
    Inventors: Gunther Zimmer, Martin Zimmer
  • Publication number: 20090056532
    Abstract: A pneumatic brake booster with a booster housing is subdivided into at least one working chamber and at least one vacuum chamber by means of at least one axially movable wall capable of being acted upon with a pneumatic differential pressure. An actuable input member includes a valve piston, with an output member for acting upon a brake master cylinder with an output force. A control valve is arranged in a control housing and can be actuated by the valve piston for controlling the differential pressure. An elastic reaction element is arranged in a control housing recess and against which the output member bears. Means for setting a distance z between the valve piston and the reaction element are provided on the output member.
    Type: Application
    Filed: February 12, 2007
    Publication date: March 5, 2009
    Applicant: Continental Teves AG & Co., oHG
    Inventors: Klaus Lind, Jurgen Faller
  • Publication number: 20040118274
    Abstract: A reciprocating drive system that utilizes energy available from pressure changes in flowing fluid systems, said drive used for the injection of additives into pipelines. The reciprocating drive includes a hydraulic accumulator having a gas chamber connected to a gas pipeline to contain said gas, whereby variation in the elevated pressure of the pipeline is reflected in the pressure applied to an incompressible fluid in a hydraulic conduit. The drive is capable of recycling gas used to drive the system back into pipelines.
    Type: Application
    Filed: December 23, 2002
    Publication date: June 24, 2004
    Inventor: James Morrison
  • Patent number: 6632496
    Abstract: A thermal insulation system includes two separate components for providing protection against both thermal and radiative conduction of energy, is easily installed, capable of easily fitting multiple substrate diameters, space-saving and lightweight, and durable. The system comprises an inner layer of heat shrink foam and an outer layer of reflective material. In the preferred embodiment, the outer layer of reflective material is heat shrink metalized material which has been recovered using known techniques onto the inner layer of heat shrink insulative material. One application for this system is for the insulation of vehicle brake fluid lines.
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: October 14, 2003
    Assignee: Sumitomo Electric Interconnect Products, Inc.
    Inventors: Michael R. C. Johnson, Christopher C. Foeger
  • Patent number: 6590952
    Abstract: In a boiling water reactor controlling each control rod hydraulically by driving a solenoid valve, the control system comprises an operation control means 41 having a duplicated data processing unit for generating sequence patterns based on the timing of the driving sequence based on the control information provided manually, a transmission control means 42 for creating a command word corresponding to each control rod being controlled based on said sequence pattern, and mutually communicating each command word between duplicated data processing units and computing the AND logic of said data within a predetermined time difference, and when the computed result coincide, transmitting the selected command word serially; a transmission unit 32 for receiving said command word and performing protocol conversion thereto, and transmitting the same to a plurality of transmission branch units positioned downstream as the control command; and a solenoid valve drive circuit 31 for driving the control rod drive unit corres
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: July 8, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Ishii, Shigeru Udono, Koji Masui, Masahiro Matsuda
  • Patent number: 5960696
    Abstract: It is intended to dispense with the pipe welding work, thereby improve the pipe mounting performance and prevent contamination which results from welding, and elimination the waste of oil.A spigot portion 34 is mounted upright integrally in the center of the upper end portion of a piston 17, the base end of a piston rod 18 is fitted on the outer periphery of the spigot portion 34, and the outer periphery of the base end of a pipe 41 is press-fitted into an upper hollow part of the spigot portion 34.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: October 5, 1999
    Assignee: Kayaba Kogyo Kabushiki Kaisha
    Inventors: Susumu Niwa, Mineo Tanahashi
  • Patent number: 5735187
    Abstract: A pneumatic piston-cylinder unit has a cylinder (1) in which an air piston (4) with a tubular piston rod (5) is reciprocably actuated by compressed air from two main air channels (18, 19). The air cylinder (1) includes an integrated hydraulic control system (6) having an actuation device (8) which is fixedly mounted in the air cylinder (1) for creating a flow of hydraulic fluid through hydraulic control system (6) when compressed air is present in the main air channels (18, 19) and for stopping the flow of hydraulic fluid and thereby preventing the air piston from moving when there is no compressed air in the main channels (18, 19). A piston (34) and a cylinder (28) of the hydraulic control system (6) are displaceable an adjustably long distance in relation to each other to make it possible to open and close, respectively, a larger or smaller hydraulic fluid passageway thereby controlling the moving speed of the air piston (4) while maintaining the air pressure.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: April 7, 1998
    Assignee: Pos-Line Aktiebolag
    Inventor: Bert Harju
  • Patent number: 5458047
    Abstract: A hydraulic damper for a high speed actuator is provided to bring the actuator to rest with minimum oscillation around a target position. The hydraulic damper comprises a hydraulic circuit to communicate with the actuator over its entire positional range for the purpose of dampening a sudden stop of the actuator about a target position. The actuator is connected by a cable to a reel, the reel being connected to a shaft movement of the actuator produces rotation of the shaft. The shaft is also connected to a hydraulic motor which pumps hydraulic fluid through a hydraulic damper too, in effect, dampen the movement of the actuator.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: October 17, 1995
    Inventor: Joseph F. McCormick
  • Patent number: 5373923
    Abstract: A rotary motor with a counterbalanced torque arm adapted to be mounted within an auger housing. The torque arm is mounted on the stationary cylinder block of the motor which extends radially outwardly from the access of the cowling and is attached to the auger housing. The torque arm includes a pair of diametrically opposed torque arm members which support pairs of cylinders. The cylinders engage the housing and are interconnected such that diametrically opposed pairs of cylinders are in fluid communication. Accordingly, rotational torques exerted on the torque arm by the cylinder block, for auger screw rotation both in the clockwise and counterclockwise directions, are born equally by the opposing torque arm members.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: December 20, 1994
    Inventor: Larry E. Koenig
  • Patent number: 5271314
    Abstract: The shock absorber comprises a strut, a sliding rod slidably mounted relative to the strut and co-operating therewith to define both a shock absorbing chamber and a raising chamber which is connected to a member for feeding it with raising liquid, a dip tube defining a lowering chamber and connected to a member for feeding it with a lowering liquid, and in which a lowering piston is disposed, which piston has one face in contact with the shock absorbing liquid, and an anti-crash tube mounted to slide relative to the sliding rod and including an energy-absorbing member.
    Type: Grant
    Filed: September 16, 1992
    Date of Patent: December 21, 1993
    Assignee: Messier-Bugatti
    Inventor: Michel Derrien
  • Patent number: 5161449
    Abstract: The present invention provides a pneumatically powered actuator having hydraulic control for both locking and controlling the velocity of an output rod without any sponginess. The invention includes a double-acting pneumatic actuator having a bore, a piston slidably engaged within the bore, and a control rod connected to the piston. The double-acting pneumatic actuator is mounted to a frame. A first double-acting hydraulic actuator having a bore, a piston slidably engaged within the bore, and a follower rod mounted to the piston is mounted to the frame such that the follower rod is fixedly connected to the control rod. The maximum translation of the piston within the bore of the first double-acting hydraulic actuator provides a volumetric displacement V.sub.1. The present invention also includes a second double-acting hydraulic actuator having a bore, a piston slidably engaged within the bore, and an output rod mounted to the piston.
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: November 10, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Hobart R. Everett, Jr.
  • Patent number: 5007327
    Abstract: A hydraulic servo actuator adapted to control a driven member in accordance with an operation of a servo circuit through which servo oil flows comprises a main cylinder and an associated piston, associated piston being reciprocable within the cylinder and the main cylinder divided by the piston into a first chamber and a second chamber which are adapted to be in fluid communication with the servo oil, a damper means provided within the main piston for dampening reciprocating movement of the main piston. A hydraulic servo actuator also includes a throttle means for imparting a predetermined restriction to the servo oil that flows between the second chamber and the damper means along the predetermined passage formed within the cylinder.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: April 16, 1991
    Assignee: Teijin Seiki Company Limited
    Inventors: Toshio Kamimura, Shigeyuki Takagi
  • Patent number: 4805517
    Abstract: A railway car hydraulic cushioning unit prevents the mixing of gas and hydraulic fluid in chambers interiorly and exteriorly of a high pressure cylinder unit by strategic placing of metering ports through the cylinder wall at positions below the level of gas in the exterior chamber. The invention is furthermore directed to a method for converting hydraulic cushioning units adapted for connection to an external spring operated restoring mechanism to a self-contained gas return unit.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: February 21, 1989
    Assignee: Rail Car America, Inc.
    Inventors: Arthur Conley, Owen Darcey, Joseph Mulligan, Jr.
  • Patent number: 4759262
    Abstract: The invention is an apparatus that allows a motor to move in any one of three linear directions, but it restrains rotary motion of the motor housing. In practice, the motor is used for driving a pump or some other rotary motion device. The device includes a lever arm fastened to the motor housing and a hydraulic cylinder pivotally connected to each end of the arm and to a support member. Each cylinder is divided into two chambers by a piston head, and hydraulic lines connect the chambers of one cylinder to the chambers of the other cylinder. When the pump (or other rotary motion device) tends to cause rotational movement of the motor housing, and lever arm, each cylinder responds to this rotational load by trying to displace fluid (oil) from one cylinder to the other. Since each cylinder tries to displace an equivalent volume of oil toward the other cylinder, through a common conduit, displacement of the oil is not possible.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: July 26, 1988
    Assignee: The Dow Chemical Company
    Inventor: Robert A. Hay, II
  • Patent number: 4526088
    Abstract: A fluid-operated actuating device of the type including an actuating cylinder member, an axially movable actuating piston rod member, and actuating fluid connection means for introducing actuating fluid to and removing actuating fluid from the actuating cylinder member so as to adjust the relative axial position of the actuating cylinder and piston members and including structure for damping the movement of the piston rod member with respect to the cylinder member.
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: July 2, 1985
    Assignee: Stabilus GmbH
    Inventors: Hermann Reuschenbach, Egon Sentinger
  • Patent number: 4442754
    Abstract: In this fluid powered positioning system, a sliding assembly includes a slide plate that moves linearly with respect to a frame. A plurality of "working" linear cylinder actuators are mounted to the frame. Each includes a piston and a rod which extends through an opening in the slide plate and terminates at a stop flange. A set of adjustable stop members are mounted to the frame and each is positioned to limit the travel of a respective actuator rod. Appropriate control means applies to a selectable one of the actuators a pressurized fluid, that causes the piston and rod to be moved in a first direction until it is stopped by the associated stop member. In this movement, the stop flange can pull the slide plate to the new location. A "balance" linear actuator cylinder includes a ram that exerts a continuous force in the opposite direction against the slide plate. This "balance" actuator damps and effectively prevents overshoot of the slide plate as it is positioned to each new location.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: April 17, 1984
    Inventor: Vladimir K. Jezbera
  • Patent number: 4422294
    Abstract: A hydraulic actuating and locking device includes a locking piston within a cylinder, an actuating piston within a cylinder in the rear surface of the locking piston and a pressure multiplier connected to the space behind the piston. A passage, constituting a high pressure cylinder, connects the space behind the piston to an oil reservoir and is adapted to receive and be sealed by the high pressure piston of the pressure multiplier.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: December 27, 1983
    Assignee: Dr. Boy GmbH
    Inventor: Heinz H. Klein
  • Patent number: 4272225
    Abstract: In an electromagnetically-operated fixed displacement pump, a lubricating oil storage tank and a communicating hole with one end opening upon the bottom of the tank are formed in a pump body, the other end of the hole in the pump body communicating with one end of another communicating hole extending through a movable armature in the axial direction thereof, the other end of the communicating hole in the armature opening into an electromagnetic gap between a fixed armature and the movable armature.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: June 9, 1981
    Assignee: Iwaki Co., Ltd.
    Inventors: Yoshiaki Fujinaka, Haruo Ohashi, Masahito Miyazaki, Kenzi Mizuno, Fukuzi Kuwabara
  • Patent number: 4168800
    Abstract: A combined hydraulic cylinder and shock absorber used in combination with a cantilever supported boom having a plurality of longitudinally spaced discharge nozzles thereon for flowable material with one end of the boom being pivotally supported from a vehicle, or the like, for vertical adjustment in a vertical plane with the hydraulic cylinder enabling angular adjustment of the boom about a horizontal axis and including a structure which provides a shock absorber to dampen and cushion vertical oscillation or bouncing movement about a horizontal axis as the boom and vehicle traverse uneven terrain such as when applying liquid fertilizer or other flowable material agent to the soil.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: September 25, 1979
    Assignee: Allied Products Corporation
    Inventor: Merle A. Quick
  • Patent number: 4145959
    Abstract: A constant speed actuator significantly characterized by being able to produce a displacement at constant speed, even though the loading on a hydraulically damped piston is substantially varied. The actuator consists of a pneumatic driving pressure which acts against a volume of hydraulic fluid, through a interface with a free piston. The hydraulic fluid, thus acted upon by the pneumatic pressure, flows to the opposite side of the hydraulic load piston through a hydraulic fluid by-pass at a constant volumetric rate regardless of the loading on the hydraulic piston. The constant volume by-pass flow is automatically controlled by employing a constant volume valve in the by-pass. Consequently, a consistent, predictable speed of actuation is achieved over a wide range of hydraulic piston loadings and pneumatic supply pressure.
    Type: Grant
    Filed: February 23, 1977
    Date of Patent: March 27, 1979
    Assignee: Teledyne McCormick Selph, an operating division of Teledyne Industries, Inc.
    Inventors: Harvey W. Burden, Phillip J. Brashear, deceased
  • Patent number: 4125060
    Abstract: An actuator, in which fluid pressure on a piston advances a stem against retractive force provided by a spring, a hydraulic dashpot is provided for the stem, and a stroke varying cushion is used for preventing engagement of a back seat between the stem and housing except when a seal is desired.
    Type: Grant
    Filed: May 24, 1977
    Date of Patent: November 14, 1978
    Assignee: Combustion Engineering, Inc.
    Inventors: John K. McGee, Floyd J. Lane
  • Patent number: 4085659
    Abstract: A powered tool control device having a pair of coaxial pistons, with the first piston effective to move the second piston after completing a predetermined amount of pretravel initiated by a prescribed operational condition of the powered tool and with resulting movement of the second piston controlled by fluid directional regulators responsive to different operational conditions of the powered tool.
    Type: Grant
    Filed: May 28, 1976
    Date of Patent: April 25, 1978
    Inventor: Barry A. Stunkel
  • Patent number: 3959968
    Abstract: The invention is concerned with an improvement in a fluid controller for a power steering system which includes a housing having a fluid A for connection to the discharge side of a main fluid pump, an outlet for connection to the suction side of the main pump and a pair of ports for connection to the opposite sides of a dual acting hydraulic device such as a balanced cylinder of the power steering system for controlling the flow of pressurized fluid to the device. The controller includes a gear set which serves as a fluid meter or as a manual pump, depending upon the operativeness of the main fluid pump, and a spool valve shiftable axially to control the flow through the inlet, the gear set, the cylinder ports and the outlet. A control shaft is mounted for rotation on the housing responsive to movement of a steering wheel and is coupled to the spool valve for effecting axial shifting of the spool valve in response to rotation of the control shaft.
    Type: Grant
    Filed: April 25, 1975
    Date of Patent: June 1, 1976
    Assignee: Caterpillar Tractor Co.
    Inventor: Jonny R. Greiner