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| Number | Title | Issue Date |
| 7322273 | Piston-piston rod retaining assembly for a hydraulic piston and cylinder unit A hydraulic piston and cylinder unit comprising the combination of a cylinder assembly defining a cylindrical chamber, a piston member mounted in the cylindrical chamber for reciprocating movement therein in response to movement of hydraulic fluid under pressure int... | 01/29/2008 |
| 7302927 | Two-part piston for an internal combustion engine Proposed is a two-part piston 1 for an internal combustion engine, having an upper part 2 that has a pin 31 having an outside thread 32 on the underside of its piston crown 4, and having a lower part 3, which is connected wi... | 12/04/2007 |
| 7240606 | Crimped piston to rod joint A method for assembling a piston on a rod, and resultant piston and rod assembly, uses one or more lock rings that are mechanically deformed radially inwardly into respective locking grooves in the rod, thereby axially locking the lock ring to the rod. The lock ring... | 07/10/2007 |
| 6938537 | Piston for an internal combustion engine A piston for an internal combustion engine which comprises a piston body, and a ring element, which together form a basic piston body. When the ring element is screwed onto the piston body, it forms a ring shaped cooling channel which is closed off in a direction of... | 09/06/2005 |
| 6711986 | Device for coupling a lever to a shift cylinder piston A device having a rigid rod mobile in a translational and/or rotational movement, whereof one end penetrates inside a recess of a piston and is fixed by a swivel to the recess of the piston directly or via an insert. The insert is mounted inside the recess of the pi... | 03/30/2004 |
| 6422130 | Piston and hydraulic control device for the clutch of an automobile provided with one such piston The invention relates to a piston for a hydraulic control device for a clutch, especially the clutch of an automobile, having a tubular metal sleeve with an internal transversal wall which is integral with the tubular body of the sleeve. A hydraulic chamb... | 07/23/2002 |
| 6336329 | Hydraulic cylinder A hydraulic master cylinder for a clutch or brake of a motor vehicle is simultaneously optimized for cost-effective mass production and for functional properties.... | 01/08/2002 |
| 6234774 | Coaxial valve-type alternating pump especially for boats such as a rubber dinghy, manually operated or motor-driven Pump (10) especially for a rubber dinghy and the like has a cylinder (11) with a double-acting alternating piston (13) and a small oblong cylinder (15) alongside the first, closed by heads (24) with packings (26), the valves (31) of the cylinder (11) comm... | 05/22/2001 |
| 6161466 | Piston pump for a vehicle brake system The invention relates to a piston pump (10) with a piston (20) axially displaceable in a bush (12). In order to keep the piston (20) captive in the bush (12), the invention proposes that an annular loss-prevention means (90), with conically protruding spr... | 12/19/2000 |
| 6032569 | Locking device for securing a piston to a piston rod For locking against rotation a piston on a piston rod, the piston having a peripheral groove and at least one radial through-hole to be positioned over a notch, a locking clip with a first straight end part and a curved part has a first end part extending... | 03/07/2000 |
| 5890417 | Piston for a reciprocating compressor A piston/cylinder assembly for a reciprocating compressor has a piston comprising telescopingly connected first and second piston members. The first piston member is connected to a connecting rod. The second piston member is provided with a piston head an... | 04/06/1999 |
| 5868554 | Flexible plunger apparatus for free movement in gas-producing wells A flexible plunger apparatus includes an elongated flexible member having a pair of opposite end portions and a longitudinal length extending between the opposite end portions, with the flexible member being adapted to flex in transverse relationship to i... | 02/09/1999 |
| 5836235 | Piston for hydraulic actuating cylinders In order to reduce the weight and manufacturing cost of a piston for a hydraulic actuating cylinder, the piston, the piston rod and the external reinforcement cap are combined to form a unitary integral part. The unitary part is advantageously a single ex... | 11/17/1998 |
| 5823075 | Tightening spanner A hydraulically-powered tightening and loosening spanner includes a ratchet wheel assembly, a retaining mechanism, a drive lever connected to a piston rod and fixedly supporting a guide, and a member rotating the ratchet wheel assembly and including a sli... | 10/20/1998 |
| 5813313 | Piston for a fluid power cylinder A piston for a fluid power cylinder, which possesses two separate piston parts, which are detachably set together in a joint region axially with a sealing action. Each piston part has a rigid carrying element, which is molded on a holding portion, which i... | 09/29/1998 |
| 5755192 | Variable compression ratio piston A piston for an internal combustion engine has a trunk portion and a crown portion slidably mounted above the trunk portion. The entirety of the trunk portion extends above the piston's wrist pin bore. A resilient element positioned the crown portion with... | 05/26/1998 |
| 5746112 | Piston for tank In an elongate tank for transport or for storage in bulk of semisolid and fluid material such as grease and oil. The tank has an outlet at one end thereof for discharging material contained therein and is of generally cylindric internal cross section. It ... | 05/05/1998 |
| 5626072 | Piston assembly for use with a bicycle operated air pump An air pump for use with a chain-driven bicycle having a free wheel. The pump assembly comprises a pair of opposed cylinders and a double-ended piston rod mounted in a housing. The piston rod has a bearing slot, which engages a crank pin on a crankshaft d... | 05/06/1997 |
| 5435234 | Mechanically retained wear-resistant ceramic pad A ceramic-metal composite structure which minimizes tensile ceramic loads and accommodates differences in thermal expansion characteristics between a metal member and a ceramic member without reliance on precise feature control for either member. The comp... | 07/25/1995 |
| 5355774 | Aircraft brake piston cap assembly The improved aircraft brake piston cap assembly (40, 40') comprises an aircraft piston (10) having a pair of openings (46) extending through the piston (10) and a piston cap (42) with a flange (44) fitted around the circumference of the piston (10 ) and h... | 10/18/1994 |
| 5305684 | Piston for internal combustion engines and like machines A piston for a combustion engine includes an external cylindrical body having an inner cavity. In the inner cavity is a partly spherical little-end of a connecting rod and a fluidtight shell or hemispherical dome. An edge portion of the dome is annularly ... | 04/26/1994 |
| 5279211 | Mechanically retained wear-resistant ceramic pad A ceramic-metal composite structure which minimizes tensile ceramic loads and accommodates differences in thermal expansion characteristics between a metal member and a ceramic member without reliance on precise feature control for either member. The comp... | 01/18/1994 |
| 5259294 | Shock-absorbing piston made up of dissimilar joined parts, blank for the piston and method for manufacturing the piston A shock-absorbing piston, a blank for the piston and a method for producing the piston include two parts being constructed radially symmetrically, but formed with outer and inner parts differing from each other. This offers great variability in the shapin... | 11/09/1993 |
| 5113747 | High pressure piston sealing system and method of its assembly The present invention relates to a high pressure piston sealing system. More particularly, the present invention relates to a sealing system adopted for rigorous marine applications which prevent or inhibit the use of a seal lubricant.... | 05/19/1992 |
| 5090519 | Disk brake for vehicles In a disk brake actuated preferably hydraulically, a piston (5) is guided within a housing located in a caliper. When pressure is applied, the piston acts in such a manner against a brake shoe (15) bearing a brake lining (17) that the brake shoe (15) is p... | 02/25/1992 |
| 5044254 | Reciprocating air motor A vibration cancellation device is provided for an air motor with a reciprocating drive piston. The device consists of an anti-phase piston which is axially aligned with the drive piston and reciprocates in the opposite direction of the drive piston. In o... | 09/03/1991 |
| 5031511 | Piston for an hydraulic brake, in particular for automotive vehicles A piston for an hydraulic brake is of the kind comprising an insulating core member and a cup member, joined together by fastening means arranged between the core and cup members. This fastening means is constituted as follows. The base portion of the cup ... | 07/16/1991 |
| 4930405 | Reciprocating piston compressor for small refrigerating machines and assembly method therefor In a compressor which has a connecting rod comprising: a second eye (31) connected to the crank pin (12) and a crankshaft (7) and including a radial projection (32) with a longitudinal slot (33), said longitudinal slot (33) having at least two end faces (... | 06/05/1990 |
| 4926745 | Pull rod assembly A pull rod assembly comprising a pull rod having three peripheral grooves, a piston device including an adaptor ring and a seal ring, said piston device being mounted on the pull rod by a split ring retainer situated in one groove and extending into an in... | 05/22/1990 |
| 4917003 | Piston to rod mounting assembly A hydraulic cylinder, piston and rod assembly wherein the piston is secured to the rod in an efficient and inexpensive manner. The piston includes a threaded interior which is secured to a corresponding threaded portion on the end of the piston rod. An op... | 04/17/1990 |
| 4821623 | Vacuum type booster A vacuum type booster which includes a booster piston reciprocatively movable in a shell, a valve sleeve for a control valve fitted to the booster piston and having a disengagement preventive flange superposed on the piston, and a clamp plate engaged with... | 04/18/1989 |
| 4815360 | Rod-piston connection A rod-piston connection uses a split ring, having two or more segments, provided with a plurality of shallow internal grooves which are adapted to mate with a corresponding plurality of shallow grooves on the piston rod, the outer periphery of the split r... | 03/28/1989 |
| 4771678 | Piston locking device for double acting hydraulic cylinder The double acting hydraulic piston and cylinder assembly of the present invention utilizes a unique fastening mechanism for fastening the piston to the cylinder rod. The piston has a rod receiving opening through which the piston rod is fitted. The piston... | 09/20/1988 |
| 4505119 | Flexible linkage for the displacer assembly in cryogenic coolers In split cycle cryogenic coolers the compression and the expansion stage are distinct from one another and are connected by gas conduits. The change of volume of the expansion chamber is obtained by a linear, periodical movement of a displacer. According ... | 03/19/1985 |
| 4430928 | Piston assembly and a method for manufacturing piston assemblies A piston assembly and a method for manufacturing piston assemblies. The piston assembly comprises a piston body, a connecting rod, a wrist pin, and a retaining spring holding the wrist pin within the piston body and maintaining the connecting rod spaced f... | 02/14/1984 |
| 4380951 | Mud pump piston assembly A mud pump piston assembly is provided which facilitates replacement and secure holding of piston parts which wear rapidly. A double acting piston includes a piston rod, a pair of hollow piston members on the rod, and a pair of wear rings located between ... | 04/26/1983 |
| 4114519 | Pistons A piston having a crown and a body connected together by bolts. The bolts pass through an annular gap defined by a pair of concentric ring members located between the crown and the body. One of the ring members is relatively resilient and the other ring m... | 09/19/1978 |
| 4079951 | Metal piston with annular flanges having synthetic overlay and annular seal A piston and cylinder device wherein the piston comprises an annular metal core with a peripheral groove for receiving an annular seal. The metal core has a peripheral overlay of nylon which provides a bearing surface at each side of the peripheral groove... | 03/21/1978 |
| 3999468 | Piston for hydraulic translating unit A piston, such as that used in an axial and/or radial piston hydraulic translating unit, comprising a hollow-skirt portion having inner surfaces defining a substantially conical cavity filled with a core of lightweight material, the material being retaine... | 12/28/1976 |
| 3934423 | Power cylinder construction A power cylinder of the multiple stage telescoping type that is characterized by a plurality of telescoping piston and cylinder assemblies, each of which comprises a composite cylinder and piston sleeve construction and an end closure construction that pr... | 01/27/1976 |
