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| Number | Title | Issue Date |
| 7900549 | Cushion ring and fluid-pressure cylinder A cushion ring which is used between a rod-side cylinder head and a piston rod of a fluid-pressure cylinder and which is externally fitted on the piston rod to cushion a shock in the vicinity of the farthest extended end of cylinder includes a throttling groove that... | 03/08/2011 |
| 7798052 | Fluid pressure cylinder First and second cushion rings are arranged respectively on both end surfaces of a piston constituting part of a fluid pressure cylinder, through fitting grooves. The first and second cushion rings are formed with substantially hollow cylindrical shapes by press wor... | 09/21/2010 |
| 7526993 | Fluid pressure cylinder apparatus having throttle valve A cylindrically shaped valve rod is housed in a valve hole formed in a cylinder body in a manner so as to be rotatable around a center axis line, and a connecting hole having a first hole opening that is allowed to communicate with a first flow path hole, and a seco... | 05/05/2009 |
| 7380391 | Agricultural mower maneuvering and lightening devices A mower including a hitching structure configured to be connected to a motor vehicle, a cutting mechanism, a maneuvering device configured to bring the cutting mechanism from a working position to a maneuvering position, and a lightening device configured to transfe... | 06/03/2008 |
| 7353922 | Air damper An air damper includes a cylinder having a bottom, a piston received inside the cylinder to move freely back and forth coaxially, and an orifice provided in the piston. The piston is formed of a synthetic resin, and has a piston rod extending toward a side of the cy... | 04/08/2008 |
| 7316341 | Adjustable exhaust assembly for pneumatic fasteners An adjustable exhaust assembly for a pneumatic fastener includes a base, which includes a base plate and a protrusion protruding from the base plate. The protrusion is centrally hollow and includes an inner surface and an outer surface. The base plate includes an in... | 01/08/2008 |
| 7299739 | Hydraulic cylinder A fluid pressure cylinder has a piston rod 18 fixed to a piston 26 and projecting outside a cylinder body 23. A lock surface 43 inclining to a radial direction of the piston rod 18 is formed in an engagement member 31 provid... | 11/27/2007 |
| 7278561 | Oil free head valve for pneumatic nailers and staplers The present invention provides a head valve assembly for a pneumatic fastener including a piston assembly reciprocated within a cylinder assembly for driving a fastener and a housing having an end cap for at least partially enclosing the head valve assembly. The hea... | 10/09/2007 |
| 7240875 | Yarn carrier A yarn carrier is provided in the form of a yarn winding tube having a yarn catch insert. The yarn winding tube is a hollow cylindrical tube having a longitudinal axis extending lengthwise between its first and second opposite ends. The tube has a hole through its s... | 07/10/2007 |
| 7240605 | Actuator with a variable run The invention concerns a pneumatic and/or hydraulic actuator. The pneumatic and/or hydraulic actuator is one in which the run of a driving shaft, which is pneumatically operated by a piston, can vary on the basis of the insertion in the body of the actuator or at le... | 07/10/2007 |
| 7232052 | Inner head housing of a nailer The present invention provides a structure of the inner head housing, which is placed inside the nail tip cover. The structure includes a movable base of the air-resistant ring, which is placed inside the slot of the fixed liner ring. The resilient component is used... | 06/19/2007 |
| 7171888 | Hydraulic cylinder A hydraulic cylinder comprising a cylinder, a piston which is adjustable in the cylinder, and at least one pressure connection which is disposed in the vicinity of an end position of the piston and through which a pressure fluid can be introduced into the cylinder, ... | 02/06/2007 |
| 7156013 | Hydraulic cylinder comprising valves An energy cylinder for operating a valve of a turbine, in particular of a steam turbine, is disclosed, wherein a cylinder housing and a control block are combined into a common block. The latter has two diametrically arranged lateral surfaces on which a control valv... | 01/02/2007 |
| 7137540 | Dual mode pneumatic fastener actuation mechanism A contact safety and trigger mechanism for use with a pneumatic fastener in order to permit efficient pneumatic fastener actuation mode selection. A rotating rod is included in a contact safety assembly which is constructed to slide toward/away from a driver housing... | 11/21/2006 |
| 7066074 | Fluid motor The piston of a fluid motor divides the cylinder into two variable volumes into which and from which fluid may be selectively introduced and exhausted via ports through the cylinder to relatively move the piston and the cylinder. The piston is modified to define two... | 06/27/2006 |
| 7021192 | Cylinder apparatus A pair of throttle valves are installed to first and second installation holes of a cylinder tube, respectively. The throttle valve comprises a rotatable member, a needle which is engaged with the rotatable member and which controls the flow rate of a pressure fluid... | 04/04/2006 |
| 6938704 | Pneumatic percussive tool with a movement frequency controlled idling position The invention relates to a pneumatic percussive tool for a paving breaker and/or a hammer drill comprising a drive piston which is displaceable both backwards and forwards by a crankshaft and arranged in a percussion piston which is displaceable both backwards and f... | 09/06/2005 |
| 6931980 | Pneumatic device with cushioning mechanism The present invention is directed to a cushioning apparatus for a pneumatic device. The cushioning apparatus generally comprises a body, wherein a piston and cylinder reside therein, wherein the piston is operable to translate along a first axis. A first port associ... | 08/23/2005 |
| 6758127 | Pressurized medium activated working cylinder A pressurized medium activated working cylinder with a piston that can move longitudinally in a cylinder chamber between two end positions has a device for damping the movement of the piston when it approaches each end position. This device comprises, e.g., a dampin... | 07/06/2004 |
| 6644945 | Valve arrangement for limiting piston stroke collisions in a reciprocating compressor with a linear motor A reciprocating compressor includes a linear motor having a piston reciprocating inside a cylinder. A cylinder head is provided with suction and discharge orifices. A valve means is mounted inside the cylinder and has an operative position, seated against... | 11/11/2003 |
| 6626055 | Rack and pinion type swing actuator A rack and a pinion respectively have stoppers constituted by a flat surface in both sides of tooth portions thereof. The stopper of the pinion is brought into contact with the stopper of the rack at both oscillating stroke ends of the rack, whereby a bac... | 09/30/2003 |
| 6626081 | Air-seal structure for pneumatic nailers An air-seal structure for pneumatic nailers includes a valve member movably engaged with the end cap of the nailer and a plurality of paths defined radially through a skirt portion of the valve member. The paths are in communication with air release passa... | 09/30/2003 |
| 6553889 | Compact pneumatic cylinder, with cushioning device The pneumatic cylinder includes a tubular body defining a piston chamber for a piston member, closed by front and rear heads; each head is provided with an inlet-outlet port for pressurised air, which opens out towards an annular slot coaxially arranged a... | 04/29/2003 |
| 6536327 | Double acting cylinder with integral end position volume chambers A pneumatic cylinder having a cylinder tube with at least one open end coupled to an end cap to close the open end. The pneumatic cylinder includes a piston reciprocally movable in the cylinder and the piston has a first seal to create a substantially flu... | 03/25/2003 |
| 6523452 | Hydraulic cylinder cushion device A cushion ring 26 enters the inner circumference of a cushion seal 34 near the end of a piston stroke, the cushion seal 34 being free to displace by a certain amount in the axial direction of a piston rod 23 in a cylinder head 28, and exerts a cushion eff... | 02/25/2003 |
| 6497172 | Rotary actuator with cushion mechanism A rotary actuator has a cushion mechanism for stopping a vane at a rotational terminal end position in a cushioning manner. The cushion mechanism has first and second openings. The first opening discharges an exhaust air pressed out from a cylinder hole b... | 12/24/2002 |
| 6435072 | Rotary actuator with cushion mechanism The invention provides a rotary actuator having a rack driven in an oscillating manner by an air pressure, a pinion engaged with the rack, and a cushion mechanism for stopping the rack to at least one normal or inverse stroke end in a cushioning manner. T... | 08/20/2002 |
| 6431048 | Combination actuator with speed variable mechanism An output shaft is connected to a piston rod of a fluid pressure-driven linear cylinder through a converting mechanism for converting linear thrust of the piston rod into rotational torque and converting operation of the converting mechanism is controlled... | 08/13/2002 |
| 6397725 | Piston and cylinder assembly and flow restrictor device therefor A piston and cylinder assembly is described having a piston which partially defines a fluid chamber in the cylinder from which fluid is expelled through an outlet port of the cylinder by movement of the piston along the cylinder, the assembly including a ... | 06/04/2002 |
| 6199822 | Fluid-operated actuator A fluid-operated actuator (10) particularly for use in diesel-engined vehicles has a housing (12) defining a cylinder (14) having a cylinder wall (16) extending about a longitudinal axis (18). A piston (20) is arranged for reciprocal motion in the cylinde... | 03/13/2001 |
| 6029561 | Fluid pressure cylinder A fluid pressure cylinder (1) includes two cylinder end walls (6',6"), a cylinder tube (2) and a piston (3), which is axially movable inside the cylinder tube, wherein at least one of the cylinder end walls is provided with an outward housing portion (7;6... | 02/29/2000 |
| 5692428 | Fluid-powered cylinder A rodless pneumatic cylinder includes main exhaust ports defined by the open ends of a pair of fixed tubular members that extend, respectively, into the cylinder body from its opposed ends. The main piston of the rodless cylinder has an axial bore formed ... | 12/02/1997 |
| 5353682 | Closing and opening means for casting machine A slidably attachable, automated means for opening and closing the die halves of a casting machine. Cylinders are provided having integral vertical side grooves for mounting on said casting machines and the like. The preferred hydraulic cylinder has a hol... | 10/11/1994 |
| 5307729 | Device for stroke end cushioning and speed regulating the movement of a piston in a fluid pressure cylinder In a device for stroke end cushioning and speed regulating the movement of a piston (3) in a fluid pressure cylinder (1,2) a common adjusting means (9) is arranged for simultaneous setting of the throttle means (7,8) for regulating the stroke end cushioni... | 05/03/1994 |
| 5248123 | Pilot operated hydraulic valve actuator A housing has a pilot bore with an electrically controlled pilot valve therein, an intermediate bore with an intermediate valve therein, and an engine bore with a main valve therein, each valve being reciprocable between first and second stable positions.... | 09/28/1993 |
| 4885978 | Fluid-operated miniature engine Miniature engine operated by an expanding gaseous fluid, which comprises a cylinder (18), piston (20) and inlet valve (29), the upper part of the piston (20) cooperating with a radially expansible resilient diaphragm (28), which is secured to the piston (... | 12/12/1989 |
| 4807514 | Differential hydraulic jack with damping system for the control of electric circuit-breakers A differential hydraulic jack with a damping system for the control of electric circuit-breakers is provided with a floating ring which produces a damping action at the end of travel and is also provided with a damping extension stud which forms part of t... | 02/28/1989 |
| 4766802 | Small-sized engine operated by fluid Small-sized engine operated by an expanding gaseous fluid, which comprises a cylinder (18), a piston (20) and an inlet valve (38), the upper parts of the cylinder (18) and the piston (20) cooperating momentarily with a perforated (29) resilient membrane (... | 08/30/1988 |
| 4759260 | Super reliable air-spring return air cylinder This invention relates to a fail-safe or auto-return actuator cylinder employing the air spring effect provided by compressed air trapped in an air-spring compartment; which air spring effect replaces the conventional mechanical coil spring employed in co... | 07/26/1988 |
| 4739694 | Apparatus for performing automatic changeover of winding of a thread in a thread winding machine and including a piston and cylinder unit for a thread winding machine The thread winding machine includes a piston and cylinder unit, comprising a cylinder housing with first and second chambers and a dividing structure between said first and second chambers. A piston is movable longitudinally in the first chamber and a pis... | 04/26/1988 |
