Adjustable Throttle (11) Patents (Class 92/12)
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Patent number: 9618073Abstract: A shock absorber comprising a tubular first portion in the form of a shock absorber casing telescopically receiving a tubular second portion in the form of a piston is disclosed. The first portion has an alignment member which encapsulates a friction element wrapped around said second portion. The alignment member is longitudinally movable in between a first stop bearing and a second stop bearing. The novel friction element has a plurality of tips or protrusions which extend, parallel to the longitudinal direction of the piston, towards the two stop bearings and which hit either of said bearings during the oscillatory back and forth movement of the alignment member during operation.Type: GrantFiled: March 28, 2016Date of Patent: April 11, 2017Assignee: Aksistem Elektromekanik San. ve Tic. Ltd. Sti.Inventor: Adil Kanioz
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Patent number: 9297434Abstract: A shock absorber (11) comprising a tubular first portion in the form of a shock absorber casing (12) telescopically receiving a tubular second portion in the form of a piston (13) is disclosed. The first portion has an alignment member (15) which encapsulates a friction element (17) wrapped around said second portion. The alignment member (15) is longitudinally movable in between a first stop bearing (18) and a second stop bearing (19). The novel friction element (17) has a plurality of tips or protrusions (25) which extend, parallel to the longitudinal direction of the piston (13), towards the two stop bearings (18,19) and which hit either of said bearings (18,19) during the oscillatory back and forth movement of the alignment member (15) during operation.Type: GrantFiled: July 12, 2012Date of Patent: March 29, 2016Assignee: AKSISTEM ELEKTROMEKANIK SAN VE TIC. LTD. STIInventor: Adil Kanioz
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Patent number: 8118566Abstract: In a piston-type compressor in which a working fluid is taken in through an intake port is first compressed with pistons and is then let out through an outlet port, an axial hole ranging along the axial direction and a radial hole communicating with the axial hole and opening into a crankcase are formed within the shaft. Additionally, a first intake passage through which the working fluid having flowed in through the intake port is guided via the crankcase to the radial hole and the axial hole and a second intake passage through which the working fluid having flowed in through the intake port is guided to join the working fluid having been drawn into the first intake passage by bypassing the crankcase are formed in the compressor. The working fluid is taken into cylinders from the area where the first working fluid and the second working fluid join each other.Type: GrantFiled: October 23, 2007Date of Patent: February 21, 2012Assignee: Valeo Thermal Systems Japan CorporationInventors: Tomoyasu Takahashi, Yoshihiro Adachi
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Patent number: 5458047Abstract: 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: GrantFiled: March 4, 1994Date of Patent: October 17, 1995Inventor: Joseph F. McCormick
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Patent number: 5294090Abstract: A snubber which may be used with a diaphragm actuator or other movable member to prevent sudden movement of the movable member is provided. A typical diaphragm actuator has a diaphragm housing with a movable diaphragm therein dividing the diaphragm housing into two separate chambers. An actuator stem is connected to the diaphragm to move with the diaphragm. The snubber has a housing with an open interior space communicating through a communication path with a first one of the actuator chambers. A first piston is reciprocably movable within the snubber housing, the first piston being operably connected to the actuator stem to move therewith. The first piston divides the snubber housing space into two chambers, one on each side of the first piston. A passage is provided which leads from one of the snubber chambers to the other. A floating piston positioned in the communication path between the first piston and the first actuator chamber.Type: GrantFiled: November 25, 1992Date of Patent: March 15, 1994Assignee: Orbit Valve CompanyInventor: Don Winnike
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Patent number: 5009068Abstract: A pneumatic piston/cylinder unit comprises primary and secondary pistons operable in first and second cylinder zones respectively. Each of the primary and secondary pistons divide its respective cylinder zone into two chambers, one of the chambers of the first cylinder zone being connected to one of the chambers of the second cylinder zone via a passageway which includes at least one control for the flow of hydraulic fluid therethrough. A tertiary piston is provided in the one chamber of the first cylinder zone and divides that chamber into two parts, one of which is between the primary and tertiary pistons. In use the passageway, the one chamber of the second cylinder zone and the other part of the one chamber of the first cylinder zone are filled with hydraulic fluid. Application of pneumatic pressure to the other chamber of the first cylinder zone causes the primary piston to be displaced until it abuts the tertiary piston whereupon movement of the primary piston may be arrested or controlled.Type: GrantFiled: June 27, 1989Date of Patent: April 23, 1991Inventor: Douglas C. Clarke
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Patent number: 4633758Abstract: A fluid-pressure-operated, double-acting working cylinder which dampens the final braking of the work piston, includes a cylinder housing with a movable work piston disposed therein, the work piston dividing the cylinder into two work chambers. A piston rod, on which the work piston is mounted, extends through the housing. At least one auxiliary braking member is disposed on at least one side of the work piston in an offset slidable relation to the work piston. A braking arrangement disposed on the auxiliary braking member is controlled by fluid pressure to brake the auxiliary braking member to a desired position within the cylinder. A dampening chamber, a dampening spring configuration is disposed between the auxiliary braking member work piston such that, following braking of the auxiliary braking member, continued movement of the work piston is effectively dampened.Type: GrantFiled: October 26, 1984Date of Patent: January 6, 1987Assignee: WABCO Westinghouse Steuerungstechnik GmbH & Co.Inventor: Heinrich Kedzierski
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Patent number: 4569274Abstract: An improved double-acting fluid cylinder with primary and secondary chambers of tandem construction, wherein the primary chamber is utilized to provide ram motion in a first direction and wherein the tandemly arranged secondary chamber is provided with a single biasing spring means to resiliently bias the secondary piston and to buffer and control the rate of motion induced in the ram, and also to drive the ram in a direction opposite the stroke of the first direction and at a time subsequent to the stroke so as to temper the ultimate amplitude or extent of motion induced in the ram in response to forces applied within the primary chamber.Type: GrantFiled: March 25, 1985Date of Patent: February 11, 1986Assignee: Timesavers, Inc.Inventor: Lee E. Stump
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Patent number: 4528894Abstract: An active pneumatic mechanism and a passive hydraulic mechanism of the apparatus are so connected with each other and with a driven member that movement imparted by the pneumatic mechanism to the driven member produces, and is controllable by restriction of, hydraulic fluid flow within the hydraulic mechanism. Restriction of the fluid flow to any desired extent is accomplished by command signals directed by a control computer to a valve that preferably is of the type actuable by a torque motor. The command signals produced by the computer are based upon a correlation of data supplied by a computer program with data supplied by a monitor of the positions of the driven member along its path of travel. Precise control of the speeds, accelerations and positions of the driven member are realized.Type: GrantFiled: November 22, 1982Date of Patent: July 16, 1985Assignee: Lord CorporationInventor: Michael J. Crosby
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Patent number: 4526088Abstract: 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: GrantFiled: November 26, 1982Date of Patent: July 2, 1985Assignee: Stabilus GmbHInventors: Hermann Reuschenbach, Egon Sentinger
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Patent number: 4523646Abstract: A fastener driving tool includes a housing defining a handle portion and a head portion with a nose portion extending therebelow. Mounted within the head portion is a cylindrical sleeve within which is reciprocally mounted a drive piston. A driver for driving fasteners is secured to the drive piston and reciprocates therewith. The tool includes a drive power control for controlling the penetration of the fasteners into a workpiece. The drive power control includes a choke encircling the sleeve to impede the flow of exhaust air from beneath the piston and under the sleeve during a driving stroke. The choke may be moved to a position spaced from the cylindrical sleeve wherein the flow of fluid below the piston is not inhibited. In addition, the tool includes a safety member with a workpiece engaging portion of at least one wear block secured thereto to engage the workpiece and protect the safety member from undue wear.Type: GrantFiled: July 22, 1983Date of Patent: June 18, 1985Assignee: Duo-Fast CorporationInventors: Richard H. Doyle, Lee B. Fiori
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Patent number: 4481868Abstract: An improved double-acting fluid cylinder with primary and secondary chambers of tandem construction, wherein the primary chamber is utilized to provide ram motion in a first direction and wherein the tandemly arranged secondary chamber is provided with a resiliently biased secondary piston to buffer and control the rate of motion induced in the ram, and also to drive the ram in a direction opposite the first direction so as to control the ultimate amplitude or extent of motion induced in the ram in response to forces applied within the primary chamber.Type: GrantFiled: July 21, 1983Date of Patent: November 13, 1984Assignee: Timesavers, Inc.Inventor: Lee E. Stump
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Patent number: 4469010Abstract: A system for resiliently supporting a load at a reference height includes a hydraulic cylinder for resiliently supporting a load about a reference height and an accumulator which cooperates with the cylinder for flowing hydraulic fluid therebetween in response to varying loads imposed on the cylinder. A valve is provided for dampening the rate of fluid flowing between the cylinder and the accumulator and a metering valve coacts with the cylinder for adjusting the reference height about which the load is supported.Type: GrantFiled: March 1, 1982Date of Patent: September 4, 1984Assignee: Applied Power Inc.Inventors: Nick Skover, Jr., Garry J. Sabel
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Patent number: 4343368Abstract: An impact device for producing impact pulses comprising a body with a movable ram having a front part transmitting the impact pulses and an extension housed in a power cylinder which is connected with the body and filled with a fluid medium under pressure for acting on the end face of the ram extension. There is also a unit ensuring the reverse stroke of the ram mounted on the body and interacting with the ram, and a unit for braking the ram on its idle stroke. According to the invention, the braking unit is formed by a space in the body which opens on one side into the power cylinder and by a movable cylindrical member accommodated in such space. The cylindrical member has bosses separated by a space from each other. The end of the cylindrical member protrudes from the body into the power cylinder while the bosses are located inside the space so that they form a chamber filled with a medium for the reverse stroke of the cylindrical member, and a chamber filled with fluid.Type: GrantFiled: December 20, 1979Date of Patent: August 10, 1982Inventors: Vladimir Y. Fadeev, Petr Y. Fadeeve, Vladlen V. Korobkov, Rim A. Kulagin, Nikolai P. Ermilov
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Patent number: 4276813Abstract: The present invention provides a method and apparatus for controlling the rate of flow of fluid in a high (e.g. 100 kg/sq cm) pressure hydraulic circuit such as is found in pneumatic piston and cylinder arrangements having hydraulic damping and which may be used to control the feed rate of a cutting tool. Control is achieved by incorporating into the fluid circuit, upstream of the flow control orifice, a pressure reducing valve designed to provide a controlled low (e.g. 7 kg/sq cm) pressure independently of changes in applied pressure or demanded flow rates and which further automatically clears itself of any silt deposited thereon from the hydraulic fluid.Type: GrantFiled: June 14, 1978Date of Patent: July 7, 1981Inventor: Henry W. Weyman
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Patent number: 4111311Abstract: A material handling unit for moving material from one position to another comprises a gripper arm on a shaft which is movable critically by fluid pressure and is rotatable by a rack and pinion mechanism actuated by a cylinder and piston. Adjustable abutments are provided for limiting the range of movement of the arm. Dashpot means for applying a damping force to the manipulator so as to decelerate it before it reaches the limit of its movement is adjustable both as to the range of action and the rate of deceleration.Type: GrantFiled: September 17, 1976Date of Patent: September 5, 1978Assignee: Kabushiki Kaisha Daini SeikoshaInventor: Hideo Hirama
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Patent number: 3990240Abstract: A method of controlling the advance and retraction of a tool on a processing machine in dependence of mechanical properties of the workpiece which tool communicates hydraulically on one hand with a drive means and on the other hand via a shut-off member on by-passes, with a pressure converter, the closing or opening of the shut-off member taking place through electrical pulses of a pressure measuring element, the pressure produced during the flow of the pressure fluid through an adjusting valve being kept constant, increasing, or decreasing for respective time periods each, the setting of the adjusting valve being operated by a pressure control for producing constant increasing, or decreasing pressure, and the pressure produced by the pressure converter and causing the retraction of the tool starting immediately after completion of its advance and being kept uniform, and an apparatus for carrying out the method.Type: GrantFiled: June 12, 1975Date of Patent: November 9, 1976Inventor: Siegfried Harcuba