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WO/1993/011348A1 |
A piston (1) assembly comprises a piston head (1) adapted for reciprocating movement in a cylinder and a connecting rod for connecting the piston head to a crankshaft. The connecting rod has a big end for pivotal attachment to the cranks...
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WO/1993/008988A1 |
A dry film lubricant coat is applied by the transfer pad process to a piston (10) to lessen the stresses associated with reciprocating engine parts and method for applying such a coat to the skirt of a piston. Wetted dry film lubricants ...
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WO/1993/006356A1 |
An engine in which a gas chamber (16) where a biassing force directed from the thrust side to the anti-thrust side by virtue of the pressure of gas introduced from an engine combustion chamber (6) acts on a piston (2) is formed between a...
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WO/1993/006389A1 |
A piston (10; 40) for an engine or motor has a skirt (16; 46) with integral pads (24; 54) projecting from at least one thrust surface (20; 50) thereof. The pads are arranged to transmit lateral thrust forces between the piston and the wa...
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WO/1992/013673A1 |
An improved drilling head comprising a machine quill (2) for receiving a drill bit (1), means for rotating the machine quill (2) and thereby also the drill bit (1) received therein, hydraulic or pneumatic apparatus for exerting a downwar...
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WO/1992/011453A1 |
In the proposed ball-and-socket joint connection comprising, for example, a ball head (3) of a piston rod (2) and the piston (5) with an insert (6), a means (7) is provided to prevent the axial displacement of the insert (6) in relation ...
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WO/1992/011128A1 |
A method of manufacturing a piston for transferring an output force to a member in responsive to pressurized fluid being communicated to a bore in a housing. The piston has a cylinder body made of a plurality of triaxial braided layers (...
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WO/1992/011104A1 |
A method and apparatus are described for the production of piston castings, and, in particular, a die construction and method of use thereof are described, the die having a crown forming part (18) separable from a skirt forming part (12)...
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WO/1992/007662A1 |
The description relates to a device (10) for the intermittent application of a fluid to a substrate with a valve actuated by a pressure medium which opens a fluid chanel leading from an inlet (30) to an application nozzle (38) or the lik...
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WO/1992/005355A1 |
A light-alloy plunger piston for spark-ignition engines intended to be lightweight, low-noise, low-friction engines, with the characteristics in which,: D = piston diameter; KH = compression height; M = depth of combustion cavity; d¿M? ...
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WO/1992/002722A1 |
An engine (40) provided with a piston (2), a top ring (3) and a second ring (4) fitted together over the piston (2), defining members (9) and (10) fitted on the piston (2) for connecting the top ring (3) to the second ring (4) so as to f...
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WO/1992/001177A1 |
The intention is to design an articulated joint between a piston (1) and a connecting rod (4) of an internal combustion engine in which a fork-shaped head of the connecting rod (4) surrounds a lug (2) projecting from the centre of the un...
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WO/1991/018189A1 |
Tappets (10; 43; 100; 160) having a cylindrical body (12) are provided with friction reducing bearing portions (14; 90; 126, 128; 162, 164, 166) which project radially further than the remainder of the body (12). Each bearing portion has...
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WO/1991/014890A1 |
The upper, piston-side sealing region (10) on the piston rod (1) of a 2-stroke diesel engine is bounded by a metallic, multiple-part coarse stripper (12). This acts as a fire-retardant ring and surrounds the piston rod (1) without spring...
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WO/1991/014889A2 |
A piston assembly comprising a piston head, and a connecting rod one end of which is secured to the piston head so as to be pivoted relative to the piston head about a predetermined axis. The end of the connecting rod supports a cross-me...
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WO/1991/012445A1 |
The side walls of cold-formed pistons for hydraulically operated brakes can be distorted if the forces acting on the piston head are large enough, the piston wall flexing outwards or inwards. The invention describes a piston (1), designe...
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WO/1991/006756A1 |
Described is a piston for internal-combustion engines, the piston comprising a head and, separate from the head, a shaft made in particular of light alloy, piston head and shaft being jointed together with a pin. The shaft is of basicall...
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WO/1991/004429A1 |
The invention describes a piston for an internal combustion engine with a piston head provided with at least one piston ring groove (2) and a connecting rod with a gudgeon pin drilling (3) and a compression stroke of less than 40 % of th...
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WO/1990/013763A1 |
A piston (10) having a crown (11), a head land (12) depending downwardly from the crown (11), a skirt (17) and at least one groove (14) (16) (18) between the head land (12) and the skirt to receive a piston ring wherein the head land (12...
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WO/1990/008253A1 |
A Stirling cycle engine is provided with gas cavities (40) at an interface between an engine piston (20) and a mating surface (22) that guides the piston (20) in its reciprocative motion to thereby achieve improved lubrication with the r...
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WO/1990/007642A1 |
A plunger piston of minimal weight and size operates with minimal noise. To this end, the upper region of the piston rod is separated from the piston head by a horizontal slit on the counterpressure side of a plane passing through the lo...
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WO/1990/005867A1 |
A split piston in an internal combustion engine, having a base (2) rockably secured to the connecting rod (4), and a detachable ring head (3) which interfaces with the cylinder wall (5). The detachable ring head (3) is snugly fitted onto...
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WO/1990/004712A1 |
Present day diesel engines having aluminum piston assemblies are limited to combustion chamber pressures of approximately 12,410 kPa (1,800 psi) whereas the desire is the increase such pressures up to the 15,170 kPa (2,200 psi) range. To...
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WO/1990/004711A1 |
Present day diesel engines having aluminum piston assemblies are limited to combustion chamber pressures of approximately 12,410 kPa (1,800 psi) whereas the desire is to increase such pressures up to the 15,170 kPa (2,200 psi) range. To ...
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WO/1990/003509A1 |
In a two-cycle internal combustion engine (10), the piston (20) has an outer peripheral oval shape (58) with a minor axis (62) offset from the centerline (54) of the wrist pin (26) towards a line (56) through the intake and exhaust ports...
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WO/1989/012769A1 |
The invention relates to a working cylinder comprising a cylinder unit with a front end part (4), a rear end part (15) and a cylinder tube (12) connecting these end parts, a piston (5) movable in the cylinder tube (12) and a piston rod (...
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WO/1989/011598A1 |
The invention concerns expandable fastenings of the kind that includes a conical shaft part (2) and a conical expandable sleeve (4) that is pressed up on the conical part (2) of the shaft (1) in order to fill out and fasten the shaft in ...
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WO/1989/009344A1 |
A locking nut assembly in which a dished washer (16) has a cylindrical bore (19) which is a close runner fit on the external cylindrical face (15) of a spigot (12) formed under the head (11) of the nut (10). In use the washer (16) is fla...
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WO/1989/002982A1 |
A cooled plunger for internal combustion engines has mutually separated piston head (1) and piston shaft. The cooling oil is injected into an outer annular space (3) in the piston head (1) and shaken by means of oil-collecting pockets (4...
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WO/1988/009889A1 |
The seal comprises a seal member (26) which is moulded by a flashless moulding process on to an insert formed in one embodiment by a flange (20c) and ribs (20d, 20e) on a piston (20). The provision of the insert reduces seal squish and i...
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WO/1988/009433A1 |
In a piston whose rod (2) is connected in a hinged manner to the upper part of the piston through the piston axis and whose upper part, inside an annular support (5) in the central region of the base of the piston, is to be cooled by the...
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WO/1988/008926A1 |
The present invention relates to an arrangement in combustion chamber surfaces of an internal combustion engine, these surfaces exhibiting at least partially a thin surface layer (2) which will influence the octane/cetane rating requirem...
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WO/1988/008078A1 |
The external profile of a piston rod employed in the engines of passenger cars ensures smoother piston travel on start-up and during partial loading. In these operating ranges, piston ring parts may impact on the sliding surface of the c...
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WO/1988/008097A1 |
The invention relates to a working cylinder, such as a hydraulic cylinder, which comprises a cylinder part with two end portions (1, 2) and an interconnecting cylinder pipe (3). The object is to provide a new working cylinder which can b...
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WO/1988/007621A1 |
This invention relates to gas lubricated pistons and cylinders. Seals (28, 30) maintain a gas cushion between the piston (14) and the cylinder wall (34) which is effective in resisting the piston sidethrust for a period long enough to pr...
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WO/1988/007132A1 |
A piston of an internal combustion engine is provided with a skirt (1) with an opening (3) for the piston pin, the axis of which is perpendicular to the axis of the skirt (1) on the side surface of which, and on the sides opposite to the...
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WO/1988/007129A1 |
High pressure reciprocator components for reciprocating machines particularly internal combustion engines, the components include a multiple ring, single groove, piston seal (54) having stacked ring elements (104) with top contraction ri...
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WO/1988/006250A1 |
The space within the interior cavity (7) of the piston (1) limited by the partially spherical head (5) of the connecting rod (6) is filled with a viscous, pasty or plastically ductile fluid (13), practically incompressible at the operati...
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WO/1988/004724A1 |
The technical problem is to reduce the operating noise of such a piston. It is solved by means of a piston having the following dimensions: a) A = (0.45-0.65) D; b) H = (0.25-0.4) D; c) A = (0.3-0.4) D; d) A greater than or equal to B; e...
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WO/1988/001017A1 |
Certain steps are proposed to prevent the edges of support bearings incorporated in the piston head of a twofold piston to be subjected to pressure against the piston pin. This is obtained by using side walls and by cooling these side wa...
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WO/1987/006646A1 |
Piston-and-cylinder arrangement (101) has a pressure-balanced piston head (104) mounted on an actuator rod (21). The piston head is mounted for axial movement with the rod, and for radial movement relative thereto. Three annular ring-typ...
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WO/1987/006655A1 |
The pressure accumulator (10) comprises a cylindrical housing (12) having a bore (14) with a piston received slidably therein. The piston (30) has an H-shaped cross section and includes a reduced diameter portion (34) extending longitudi...
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WO/1987/005076A1 |
The piston engine consists of a cylinder block with at least one cylinder in which the piston, equipped with at least one piston ring and connected with the crankshaft, is arranged to move up and down. In order to take account, in the en...
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WO/1987/003663A1 |
In order to obtain an improved lateral guidance of the head (1) of a piston in the direction of the piston pin, a trunk piston having two parts for combustion engines, the shaft of the piston being completely separated from the head and ...
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WO/1987/000890A1 |
Downhall mechanism for positive displacement pump for deep drilling of the type comprising a surface mechanism actuating via a control rod (2), a shuttle-forming downhall mechanism (1) reciprocatingly movable in a pumping tube (9) commun...
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WO/1986/005249A1 |
A piston has skirt portions (13) which are provided with parallel rows (14) of cavities (15) whose maximum depth below the surface of the skirt portion is 0.010 mm. Parts (20, 23) of the skirt portion are left between the cavities for pr...
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WO/1986/004128A1 |
A piston (1) and connecting rod (2) are connected together so that compression forces are transmitted from one to the other by mechanical contact between an end (3) of the connecting rod and a projection (4) on the crown of the piston. T...
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WO/1986/003815A1 |
A piston generates reduced noise in operation by the provision on its lateral bearing surfaces (15) of two or more depressions (18) in which oil is stored to provide a cushion against lateral movement of the piston at points of a recipro...
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WO/1986/001858A1 |
A piston comprises a crown (10) and a ring band (11) carried on two gudgeon pin bosses (12a, 12b) by two supports (20). There are upper and lower pairs of struts (21a, 21b, 21c, 21d) on each side of the gudgeon pin bosses, one strut of e...
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WO/1986/001272A1 |
A piston for internal combustion engines comprises, on the shaft sliding surfaces which absorb the lateral pressures, a large number of oil pockets (6), each of which is limited around the total circumference by the mesh (9) of a lattice...
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