Double Acting Motor Reversed By Pressure Variation Of Motive Fluid Patents (Class 91/166)
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Publication number: 20150122114Abstract: A control device includes a valve, having a body connected to the first chamber of a cylinder via a first hydraulic connection and to the second chamber of the cylinder via a second hydraulic connection. The control device includes a first hydraulic duct connected to a first actuating-fluid source, and a second hydraulic duct connected to a second actuating-fluid source. The hydraulic ducts communicate with the body of the valve. The valve further includes a distribution device that is movable within the body of the valve, between a first position, in which the distribution device places the first hydraulic connection and the first hydraulic duct in fluid communication, and a second position, in which the distribution device places the second hydraulic connection and the second hydraulic duct in fluid communication.Type: ApplicationFiled: January 8, 2015Publication date: May 7, 2015Inventor: Armin STEINHILBER
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Publication number: 20140360349Abstract: The invention relates to a hydraulic cylinder, for example for use in a hydraulic tool, comprising at least one piston/cylinder combination composed of a cylinder body and a piston accommodated in said cylinder body and provided with a piston rod that projects from said cylinder body, wherein the cylinder body and the piston body define a first cylinder chamber while the cylinder body, the piston body and the piston rod define a second cylinder chamber, and wherein during operation the piston performs alternating forward and return operational cycles under the influence of a fluidum under pressure that is conducted to the first and the second cylinder chamber through a first and a second line, respectively, and a control valve which regulates the supply of a fluid under pressure through the first or the second line to the piston/cylinder combination.Type: ApplicationFiled: June 10, 2014Publication date: December 11, 2014Applicant: DEMOLITION AND RECYCLING EQUIPMENT B.V.Inventor: Gertrudis Maria Gerardus De Gier
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Publication number: 20140116240Abstract: A multifunctional cylinder includes: a cylinder housing in which an operating fluid is filled; a rod having one end provided in the cylinder housing and linearly moved in the longitudinal direction of the cylinder housing in accordance with a flow of the operating fluid; and a piston assembly provided at one end of the rod and moved together with the rod and changing a movement amount of the rod per unit time by controlling a passing flow rate of the operating fluid that flows to the other end from one end in the cylinder housing per unit time, and a method for controlling the cylinder.Type: ApplicationFiled: December 13, 2012Publication date: May 1, 2014Applicant: Hyundai Motor CompanyInventor: Hyun Seop Lim
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Publication number: 20130068090Abstract: A method of operating a dual acting hydraulic cylinder comprising the steps of returning a hydraulic fluid from a rod-side chamber to a piston-side chamber of the cylinder during a start phase of cylinder extraction with a speed component and increasing pressure of the fluid during end phase of cylinder extraction with a booster component and permitting the fluid to flow from the rod-side chamber to a reservoir. A hydraulic device for operating a dual acting hydraulic cylinder comprising a speed component arranged to return a hydraulic fluid from a rod-side chamber to a piston-side chamber of the cylinder at a start phase of cylinder extraction and a booster component arranged to increase the pressure of the fluid at an end phase of cylinder extraction.Type: ApplicationFiled: November 26, 2010Publication date: March 21, 2013Inventor: Joost Luyendijk
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Publication number: 20090007771Abstract: An electromagnetic valve, a circuit board on which a control circuit for controlling the electromagnetic valve is mounted, and a cover for covering the electromagnetic valve and the circuit board are installed on a device-attaching surface of an adapter plate disposed at one end in a direction of an axial line of an air cylinder, in a manner so as to be housed within a surface area of the device-attaching surface, and an output port of the electromagnetic valve and a pressure chamber of the air cylinder are allowed to communicate with each other through an air through-hole provided in the adapter plate.Type: ApplicationFiled: May 21, 2008Publication date: January 8, 2009Applicant: SMC CorporationInventor: Takumi MATSUMOTO
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Publication number: 20080210108Abstract: Disclosed is a plunger-cylinder assembly for a press, comprising a plunger (5) which is accommodated at least in part in a cylinder (1) while separating the interior (10) of the cylinder into two partial chambers (10.1, 10.2) along the cylinder axis (X). A relieving device which counteracts an increase in pressure of a fluid accommodated in the first partial chamber (10.1) is disposed in at least one first partial chamber (10.1), said increase in pressure being caused by a movement of the plunger (5) along the cylinder axis (X) in the direction of the first partial chamber. Also disclosed is a hydraulic press encompassing such a plunger-cylinder assembly.Type: ApplicationFiled: July 11, 2006Publication date: September 4, 2008Inventors: Matthias Hahn, Volker Manternach
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Patent number: 5819533Abstract: A hydraulic motor has three interconnected power pistons. The pistons include passageways therebetween that allow a working fluid to be conserved upon reciprocating piston motion. Valves control the pressure state of working fluid within working chambers, which in turn will cause the three piston assembly to oscillate within the working chambers. The hydraulic motor is combined with a pressure source and an energy converter to form a hydraulic-pneumatic power plant. The energy converter converts pressurized working fluid from a single port into pressurized fluid passed through a first port and reduced pressure fluid passed through a second port. The pressure source is preferably pneumatic, which provides the necessary store of energy, or push, to initiate motion within the hydraulic motor.Type: GrantFiled: December 19, 1996Date of Patent: October 13, 1998Inventor: Raymond J. Moonen
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Patent number: 5542336Abstract: A double-acting hydraulic cylinder is controlled by a pair of three-way solenoid valves respectively fluid connected to the two ends of the cylinder and energized in parallel with a continuous stream of pulse width modulated (PWM) pulses to create a mean effective fluid pressure balance at the cylinder ends that hold a desired position of a connected load and mean effective fluid pressure imbalances in the cylinder ends that produce variable rate load movement in either of two directions to a desired new position, all determined by the pulse duty cycle.Type: GrantFiled: April 17, 1995Date of Patent: August 6, 1996Assignee: Martin Marietta CorporationInventor: Robert F. Larkin
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Patent number: 4976186Abstract: A control system for mechanically adjustable motor drives which have a shiftable speed control for controlling the speed of the drive. The system includes a double acting pneumatic cylinder which is remotely controlled to shift the speed control by varying the air pressure in the double acting cylinder, to increase or to decrease the speed of the motor drive. The air pressure can be varied manually or by automatic control means.Type: GrantFiled: December 20, 1988Date of Patent: December 11, 1990Assignee: Reliance Electric CompanyInventors: Keith L. Carmichael, James F. Runyan
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Patent number: 4939981Abstract: A hydraulic servo cylinder device for controlling a speed reduction ratio or clutch operation in a continuously variable transmission comprises cylinder and a piston slidably fitted in a cylinder chamber of the cylinder. The cylinder chamber is divided by the piston into a rod-side cylinder chamber and a head-side cylinder chamber, the rod-side cylinder chamber being supplied with a hydraulic line pressure, the head-side cylinder chamber being supplied with a hydraulic control pressure. When the piston is moved to a position near a head-side stroke end, the control pressure in the head-side cylinder chamber is so set that a hydraulic force which the piston receives from said control pressure is in equilibrium with a hydraulic force which the piston receives from the line pressure.Type: GrantFiled: October 19, 1988Date of Patent: July 10, 1990Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Kazuya Maki, Hideo Koyama, Takeo Suzuta
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Patent number: 4809587Abstract: An actuator has a pilot valve incorporated in a piston thereof which is slidably disposed in a cylinder tube, the piston having first and second piston lands slidably disposed in first and second coaxial cylinder chambers. A spool valve body has first and second spool lands slidably disposed in an inner hole in the piston. When the spool valve body is moved in one direction, a first axial passage in the piston communicates with a pressure sink through a first return port which is opened by the first spool land, and a second axial passage in the piston communicates with a portion of the inner hole in front of the second spool land through a second supply port which is opened by the second spool land.Type: GrantFiled: February 17, 1988Date of Patent: March 7, 1989Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Eiichiro Kawahara, Kenichi Ikejiri, Takashi Iino, Kenjiro Iwasawa, Noboru Yamamoto
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Patent number: 4700623Abstract: This invention is directed to a trash compactor suitable for use in aircraft and aerospace vehicles. The compactor includes improved hydraulic power and control systems which provide short compaction cycle times and high compaction ratios and which has integrated means to loosen trash containers from the supporting walls of the compacting chamber at the completion of the compaction cycle so that the filled trash containers can be readily removed from the compactor.Type: GrantFiled: September 26, 1985Date of Patent: October 20, 1987Assignee: A.K.G.S. Partnership, A Partnership of Las VegasInventors: James L. Durbin, Robert M. Clemens
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Patent number: 4579039Abstract: A power drive unit for thrust reverser structure includes a reversible motor in a hydraulic circuit and has normal stow and deploy cycles of operation. In a deploy cycle, the load on the motor is aiding and, in the event the deploy cycle is inadvertent, the load on the motor can be substantially higher. In order to avoid this increased loading on the motor in an inadvertent deploy cycle, the hydraulic circuit has an auto-restow valve which senses the high aiding load in the event of an inadvertent deploy operation and changes the operation of the power drive unit to operate the motor in a stow cycle to prevent continued high loading on the motor and thrust reverser structure.Type: GrantFiled: December 12, 1983Date of Patent: April 1, 1986Assignee: Sundstrand CorporationInventor: Steven J. Ebbing
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Patent number: 4046060Abstract: A hydraulic control system for use with double-acting shifting rams in a mine working.The system has a pump for supplying pressure fluid and main and return feed lines or conduits connected to the pump and laid along the working. An adjustable pressure-regulating device or devices serves to provide fluid at variable pressure in a further feed line or conduit.Each ram has its working chambers connected to a control device which is in turn connected to the main and further feed lines or conduits and to the return line or conduit. The devices can each be set to various positions to operate the rams in order to extend one of the rams its associated device is set to connect the working chamber used for extension (having the larger piston working surface area) to the further feed line or conduit, and to connect the other working chamber used for retraction (having the smaller piston working surface area) to the to the main feed line or conduit.Type: GrantFiled: August 4, 1975Date of Patent: September 6, 1977Assignee: Gewerkschaft Eisenhutte WestfaliaInventors: Kunibert Becker, Walter Weirich
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Patent number: 3967535Abstract: A uniflow steam engine of the multi-cylinder type wherein the cylinders are rotatably mounted within a jacket having a sinusoidal cam track therein. Extending through slots, the ends of which are the exhaust ports in the cylinders and into the cam track are cam followers which are mounted on the pistons for reciprocable movement therewith. At the head end of the cylinders there are apertures which rotate with registered cutouts in superimposed valve rings that control the flow of steam from manifolds at the head ends of each of the cylinders into the cylinders as the cylinders rotate. By adjusting the relative position between the valve rings, the length of time of steam introduced on each cycle may be adjusted and by concomitantly rotating both valve rings, the initial time for introduction of steam may be adjusted to alter lead or reverse torque.Type: GrantFiled: February 21, 1974Date of Patent: July 6, 1976Inventor: Murry I. Rozansky