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| Number | Title | Issue Date |
| 8127661 | Hydraulic system The present invention relates to a hydraulic system that includes a compression chamber capable of being subjected to the pressure of a hydraulic fluid; a piston movable inside the compression chamber along an axis; and at least one sealing gasket disposed between t... | 03/06/2012 |
| 7987766 | Hydraulic cylinder apparatus The hydraulic cylinder apparatus has a crescent shaped length housing a piston of like shape. The crescent shape provides for fit into constrained spaces where a fully cylindrical cylinder cannot fit. Multiple crescent shaped case ring lands with case rings seal the... | 08/02/2011 |
| 7313999 | Piston for a reciprocating machine A piston includes a piston body fitted into a cylinder bore and having a sliding peripheral surface disposed in sliding contact with the inner peripheral surface of the cylinder bore. The sliding peripheral surface of the piston body and the inner peripheral surface... | 01/01/2008 |
| 7290480 | Swing cylinder A swing cylinder having a body and an end cap on each end of the body. The cylinder also has a piston arranged within the body. The cylinder has a rod engaged with the piston and has an arm attached to one end thereof. A guide is arranged on the opposite end of the ... | 11/06/2007 |
| 7131822 | Swash plate compressors with non-circular pistons and cylinders A swash plate compressor comprises a swash plate located for rotation in a housing and a compression unit that forms a part of the housing. The compression unit has cylinder bores that guide pistons in reciprocation as the swash plate rotates. Each cylinder bore has... | 11/07/2006 |
| 7056100 | Piston assembly for a compressor A compressor for a vehicle air conditioning system comprises a front casing in which is mounted a swash or wobble plate arrangement operatively connected to a drive shaft and a plurality of pistons each provided with a piston body at one end and a foot portion at it... | 06/06/2006 |
| 7028600 | Hydraulic radial piston engine A hydraulic radial piston engine has a lifting ring fixed to the casting, a rotor mounted opposite the lifting ring such that it is rotatable about an axis of rotation, multiple piston seats aligned radially in the rotor relative to the axis of rotation, and multipl... | 04/18/2006 |
| 6959913 | Actuator An actuator having a set of slidable pistons including sliding regions with the sliding regions including at least one wear member supported by a resilient member and a second wear member laterally spaced from the first wear member with a lubrication reservoir locat... | 11/01/2005 |
| 6928921 | Piston bore A piston for a compressor for use in hermetically encapsulated small-type refrigerating machines, with a cylinder-jacket-like sealing and guide surface section (1a, 2) as well as at least two substantially bridge- and cylinder-jacket-sector-like... | 08/16/2005 |
| 6755115 | Working cylinder A fluid power operated fluid power cylinder having a cylinder housing (2) on whose rear side a control system housing (33) is mounted. The control system housing (33) contains a valve means and furthermore a electronic valve circuitry and/or ele... | 06/29/2004 |
| 6637316 | Pressure fluid cylinder with optional anti-rotation feature A pressure fluid cylinder with anti-rotation feature, includes a cylinder tube of non-circular inner cross section and a piston which is sealingly received in the tube. The piston has a circular cross section and is connected at one end to a piston rod in... | 10/28/2003 |
| 6526870 | Fluid pressure cylinder A circular piston and a noncircular rod are separately formed as separate parts and the piston and the rod are integrally connected to each other through an adhesive in a state in which the piston is aligned to be concentric with a circular bearing hole o... | 03/04/2003 |
| 6502880 | Pin part locator A preferred embodiment of a fluid powered apparatus has a housing, a piston and an off-axis member to deter piston rod rotation relative to the housing. In a further aspect of the present invention, an off-center pin actuates one or more sensors while als... | 01/07/2003 |
| 6474217 | Rodless cylinder In a cylinder tube of a rodless cylinder, a bore having an approximately rhombic cross section is formed. The approximately rhombic cross section of the bore has a thickness smaller than a width. There is a fluid bypass passage for centralized piping in t... | 11/05/2002 |
| 6386833 | Air compressor assembly with dual cooling fans An apparatus includes a motor with an output shaft. A solitary air compressor is linked to the output shaft so as to be driven by the output shaft. The compressor contains a piston in a cylinder. A first fan is mounted on the output shaft to direct coolin... | 05/14/2002 |
| 6354820 | Pump For the purpose of providing a thin pump designed to decrease the number of parts, the pump is provided with a rectangular parallelepiped cylinder (3) and a piston located inside of the cylinder, wherein the piston (4) reciprocates and oscillates in the c... | 03/12/2002 |
| 6210135 | Internal combustion rotary engine An internal combustion rotary engine includes a stationary, centrally located manifold having an intake and an exhaust port. Inner and outer rotor assemblies are provided which rotate in a common direction about the centrally located manifold. Each of the... | 04/03/2001 |
| 6196125 | Sealing arrangement in hydraulic press A hydraulic press including a cylinder barrel, a piston and a seal housing. The cylinder barrel has an inner peripheral surface. The piston has a pressure side surface and is inserted in the cylinder barrel to form a chamber between the pressure side surf... | 03/06/2001 |
| 6152015 | One-side fed, double-acting, pneumatic actuator The pneumatic actuator comprises at least one double-acting cylinder having a tubular body and two closure heads which define a piston chamber for a reciprocable piston; the body of the cylinder consists of an extruded tubular section provided with at lea... | 11/28/2000 |
| 5927243 | Internal combustion engine with siamesed cylinder bores and pistons A reciprocating internal combustion engine includes a siamesed piston bore having a configuration formed by the intersection of two circular cylindrical elements and a matching piston having a similar siamesed configuration. This cylinder configuration al... | 07/27/1999 |
| 5865091 | Piston assembly for stirling engine A piston assembly for a double-acting engine such as a double-acting Stirling engine. A pair of sealing rings located on opposite sides of a sealing washer are positioned between a base section and a dome section of a piston head. These sealing rings are ... | 02/02/1999 |
| 5791231 | Surgical robotic system and hydraulic actuator therefor A hydraulic actuator is described which has a layered structure and a flattened piston assembly to enhance production speed and reduce the costs of assembly. A system for performing surgery is also described incorporating the hydraulic actuator, having a ... | 08/11/1998 |
| 5711472 | Self contained gas powered surgical apparatus A self contained gas powered endoscopic surgical apparatus is provided for placing lateral lines of surgical fasteners into body tissue. The apparatus includes a frame portion, an elongated portion extending from the frame portion, and an articulating fas... | 01/27/1998 |
| 5701798 | Linear actuating device The linear actuating device of the present invention has a rodless power cylinder unit with a cylinder barrel. An external carriage is disposed on the cylinder barrel and is movable along the axis of the cylinder barrel. A base on which a guide rail is mo... | 12/30/1997 |
| 5609091 | Fluid power advancing unit A fluid power operated advancing unit has housing and a plunger adapted to run axially therein. The plunger is designed in the form of a three sided prismatic body at least along its length section running in the housing, said body being guided in the hou... | 03/11/1997 |
| 5437436 | Stand-alone gas spring A self-contained gas spring that has low heat generation characteristics and is easy to manufacture and maintain. The spring includes a bearing and seal assembly that is easy to remove from the cylinder body of the spring. The assembly includes an annular... | 08/01/1995 |
| 5421243 | Compact refrigerant compressor An automotive air conditioning compressor of more compact and efficient design is achieved with a unique cylinder bore and piston shape. While the cylinder bores and pistons are arrayed in a circle about the central axis of the round cylinder block, the b... | 06/06/1995 |
| 5415135 | Four stroke continuous cycle radial piston engine An rotary internal combustion engine consisting of a rotatable cylinder made up of fuel charge and multiple working segments rotating in unison. The fuel charge and working segments each contain a plurality of radially arranged cylinders open at both ends... | 05/16/1995 |
| 5400696 | Fluid-operated drive The invention relates to a drive, particularly a push and pull drive, which has a cylinder with a cylinder inner chamber (Z) and a cylinder axis (F) and a piston movably arranged in the cylinder and to which is fixed a flexible force transfer means (U). F... | 03/28/1995 |
| 5380166 | Piston type refrigerant compressor A piston type compressor housing encloses a crank chamber, a suction chamber, and a discharge chamber. The compressor housing includes a cylinder block. A plurality of cylinder bores are formed in the cylinder block in which a plurality of pistons are sli... | 01/10/1995 |
| 5359916 | Perforator A perforator has a perforator disk rotatably seated in a U-shaped bearing bracket. The bearing bracket is movable into and out of the path of movement of a piece to be perforated by a piston-cylinder unit which is actuated from either side of the piston. ... | 11/01/1994 |
| 5279371 | Down-the-hole drilling machine Down-the-hole drilling machine comprising a housing in form of a tube (1), a hammer piston (6) being movable to-and-fro in the tube and intended for impacting a drill bit (5). The hammer piston is at its ends provided with end sections in form of polygons... | 01/18/1994 |
| 5261321 | Piston having oval shaped crown A piston for connection by a piston pin and connecting rod to a crankshaft for reciprocating in a cylinder of an internal combustion engine. The piston has a crown and top land region, an intermediate region including at least one additional land, and a s... | 11/16/1993 |
| 5245912 | Profiled tube for a working cylinder without a piston rod The invention relates to a profiled tube for working cylinders without a piston rod having a cylinder chamber which extends in longitudinal direction and a piston guided movably therein and connected to pull means, and a carriage connected to the pull mea... | 09/21/1993 |
| 5211101 | Piston with oval shaped lands A piston for an internal combustion engine with a separate head and skirt which are joined by the piston pin. At least one of the upper lands has a reduced diametrical clearance with the cylinder wall in an area perpendicular to the pin direction. The bot... | 05/18/1993 |
| 5207145 | Work cylinder, such as the work cylinder of a rodless piston cylinder This invention relates to a work cylinder having damping stops for limiting movement of the piston within the cylinder, the cylinder having cylinder covers for closing the ends of the cylinder, whereby the damping stops are positioned and retained substan... | 05/04/1993 |
| 5172626 | Stabilized piston skirt having varying peaks and concave surfaces A piston with a skirt shaped to accommodate distortion by changing thermal and load conditions is further modified to increase stability and broaden load distribution to reduce contact forces and wear by providing maximum radii lines on either side of a l... | 12/22/1992 |
| 5158008 | Light plunger piston for internal combustion engines A piston having a head with ring grooves, a skirt having hub bores, and a pin, with the following dimensions: L/D=0.45-0.8 H/D=0.25-0.5 A/D=0.3-0.5 T/D=0.45-0.8 where L=maxium length of the piston D=maximum diameter of the piston H=compression height A=maximum skir... | 10/27/1992 |
| 5146838 | Piston apparatus for use in web pressing components in papermaking machinery A piston apparatus for use in a controlled deflection roll includes a rectilinear-shaped piston having at least one side seal extending longitudinally in a slot in each side wall and an end seal in each end of the piston extending between the side seals. ... | 09/15/1992 |
| 5144883 | Cylinder without a piston rod A cylinder without a piston rod comprising a cylinder, a piston for moving along the axial direction within the cylinder, and tension belt means for directing the piston witnin the cylinder. The piston comprises two piston halves which are interconnected ... | 09/08/1992 |
