Bizarre Patents
User-operated amusement apparatus for kicking the user's buttocks
An apparatus including a user-operated and controlled apparatus for self-infliction of repetitive blows to the user's buttocks by a plurality of elongated arms bearing flexible extensions that rotate under the user's control.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8146483 | Piston for radial piston hydraulic engine and method for making same A piston including a body having a guiding and sealing surface, a base, and a top, which top is provided with a cradle-shaped recess in which a journal-bearing lining is retained by stop surfaces formed on the edges of the recess. The stop surfaces are formed by def... | 04/03/2012 |
| 8037810 | Piston for a hydraulic brake and method for production thereof A piston for a hydraulic brake configured as a bowl, open on one side, with a longitudinal axis, a wall and a bottom, and is delimited on an open end face by a rim with an axial abutment surface which is movable into abutment on a brake pad. The bottom has an essent... | 10/18/2011 |
| 7428862 | Cladded axial motor/pump piston and method of producing same A method of producing a piston that involves providing a piston body formed of a first material, the piston body having a cylindrical portion having a diameter, a rounded end, and a neck connecting the rounded end to the cylindrical portion and having a diameter les... | 09/30/2008 |
| 7399733 | Metallic sliding member, piston for internal combustion engine, method of surface-treating these, and apparatus therefor A metallic sliding member which is improved in initial compatibility and significantly reduced in frictional resistance: and a process for producing the member. The process comprises causing fine particles of molybdenum disulfide to collide against the surface of a ... | 07/15/2008 |
| 7387062 | Seal ring free piston structure A piston includes a cylindrical body having a neck formed on an outer periphery of the cylindrical body so as to form a first annular disk and a second annular connecting to the first annular disk via the neck, multiple through holes defined through the second annul... | 06/17/2008 |
| 7310965 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 12/25/2007 |
| 7305916 | Reciprocating-piston machine for motor vehicles A piston compressor has a cylinder including a traveling piston sealed therein. A drive motor acts on a crankshaft, a drive shaft thereof being received by a bore of the crankshaft. A connecting rod provides for articulated connection of a crankshaft-journal of the ... | 12/11/2007 |
| 7284961 | Pumping system, replacement kit including piston and/or cylinder, and method for pumping system maintenance A pumping system including a pump is disclosed. The pump includes a replacement piston and a replacement cylinder associated with the replacement piston. The replacement piston has a cross sectional area smaller than a cross sectional area of an original piston of t... | 10/23/2007 |
| 7179064 | Reciprocating piston compressor for a gaseous medium A reciprocating piston compressor for a gaseous medium is provided having a reduced structural height. The compressor is especially for a level control system in a motor vehicle. The maximum pivot angle of the piston ring longitudinal axis relative to the longitudin... | 02/20/2007 |
| 7174829 | Adjustable piston pump An adjustable piston pump for displacement and extraction of remnant from soft sand and or soft soil includes a pump casing cylinder that is capped at one end and opens at the other end. It includes a handle fixed to the pump casing cylinder, a shaft rod, a shaft ro... | 02/13/2007 |
| 7159412 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 01/09/2007 |
| 7137197 | Method of manufacturing a piston having a hollow piston head A method of manufacturing a piston using a swaging tool includes the step of positioning a portion of a first member and a portion of a second member of the piston within a first end of an opening formed through the swaging tool, such that a reduced diameter portion... | 11/21/2006 |
| 7090222 | Shaft sealing assembly for vacuum processing apparatus Herein disclosed is a shaft sealing apparatus which comprises a vacuum casing formed with a vacuum chamber, a driving shaft having an outer cylindrical surface and movably extending in the vacuum chamber of the vacuum casing, and a sealing ring in the form of an ann... | 08/15/2006 |
| 7080610 | Cooled piston consisting of two parts Cooled two-part piston for internal combustion engines having an upper piston part containing the piston ring grooves and piston pin bosses, and a piston skirt connected with the former exclusively by way of a piston pin. The upper piston part has a cooling oil annu... | 07/25/2006 |
| 7073346 | Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus and vacuum sensor The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 07/11/2006 |
| 7063004 | Piston assembly Apparatus and methods for assembling a piston assembly that comprises a piston comprising a head end flange and a crank end flange and a rod having a head end shoulder and a crank end shoulder. The head end shoulder of the rod contacts the head end flange of the pis... | 06/20/2006 |
| 7059128 | Hydraulic system for a motor vehicle The piston in the master cylinder of a hydraulic system of the kind that is used particularly in motor vehicles is made of a duroplastic polymer material. ... | 06/13/2006 |
| 7000526 | Hydraulic piston made from rolled sheet metal, method for its manufacture and intermediate product of the method The invention relates to a cup-shaped hydraulic piston (10) made from rolled sheet metal, which comprises an open end (12), a side wall (16) with a cylindrical outer surface (18) and an inner surface (22), as well as a piston head ... | 02/21/2006 |
| 6925925 | Piston for a compressor In a piston for a compressor, the piston comprises a stem by which the piston may be guided in the housing in an axially displaceable manner, and a force introducing section where an outer drive force can be introduced into the piston. The piston head, the piston sk... | 08/09/2005 |
| 6837146 | Piston for internal combustion engines To provide the pistons of internal combustion engines with profiled ring grooves in a simple manner. To this end, the profile is produced by laser beams. ... | 01/04/2005 |
| 6813990 | Piston unit with a piston skirt comprising two rings jointed by joint elements at angularly-spaced positions A piston unit (10) comprises a piston (10a) and a connecting element (5). The piston comprises a piston head (1) comprising a compression surface (1a1) and a skirt portion. The skirt portion comprises a first a... | 11/09/2004 |
| 6732633 | Reduced dead volume hollow piston A piston for use in the cylinder block of a hydraulic power unit. The piston has an elongated cylindrical body with one end configured to connect with a slipper element. The second end of the piston is open with an annular cavity in the piston body defining an elong... | 05/11/2004 |
| 6669449 | Pad plunger assembly with one-piece locking end members A pad plunger assembly includes a central mandrel having externally-threaded opposite ends, collars defined about the mandrel inwardly adjacent to the opposite ends and having circumferentially spaced recesses formed in the collars, end members having inn... | 12/30/2003 |
| 6588321 | Closed cavity piston and method of making the same A closed cavity piston includes an elongated piston body and a separately formed piston cap having an elongated stem and head thereon. The body includes a closed end and an open end with a cavity having a bottom wall adjacent the closed end and an outer w... | 07/08/2003 |
| 6575080 | Single-headed piston for swash plate type compressor wherein head portion has a curved surface at axial end A single-headed piston for a swash plate type compressor including a head portion having an outer circumferential surface for sliding contact with an inner circumferential surface of a cylinder bore formed in a cylinder block of the compressor, and an eng... | 06/10/2003 |
| 6547534 | Compression apparatus There is disclosed a high-pressure compressor comprising a compression mechanism for reciprocating/driving a piston with respect to a conventional cylinder by rotation of a motor and compressing an operating fluid sucked by this driving to generate the hi... | 04/15/2003 |
| 6544007 | Radial piston pump with noise reduction Described is a radial piston pump with a pump housing (3), which has a plurality of cylinder bores (5) arrayed in star shape around a cam (4), for the reception of pistons (6) and possesses inlet (7) and outlet (8) when penetrate to each cylinder inner ch... | 04/08/2003 |
| 6540492 | Compressor piston with reduced discharge clearance A compressor piston has protrusions which extend upwardly into discharge ports to minimize clearance at the end of the compression stroke. The protrusions fit into circumferentially isolated discharge ports, and each of the ports are associated with reed ... | 04/01/2003 |
| 6526868 | Master cylinder for use in power trains of motor vehicles A master cylinder for use in the power train of a motor vehicle to actuate the brakes or the friction clutch is designed to avoid the generation of screeching noise and/or the transmission of stray movements to the piston rod in response to shifting of th... | 03/04/2003 |
| 6513417 | Single-headed swash-plate-type compressor with hollowed and ribbed piston A single headed swash plate type compressor includes a swash plate and pistons reciprocatingly arranged in cylinder bores. Each piston has a body portion and a neck portion. The body portion of the piston has a cavity to reduce the weight of the piston, a... | 02/04/2003 |
| 6484621 | Swash plate type compressor wherein piston head has inner sliding portion for reducing local wear Swash plate type compressor including a cylinder block having cylinder bores arranged along a circle, a drive shaft aligned with the circle, a swash plate rotated with the drive shaft, and single-headed pistons each including a head portion engaging the c... | 11/26/2002 |
| 6477940 | High-pressure piston cylinder unit The invention relates to a high-pressure piston cylinder unit, especially an injection pump or an injection valve for an internal combustion engine, and to a method for producing one such high-pressure piston cylinder unit. The high-pressure piston cylind... | 11/12/2002 |
| 6471496 | Piston pump for a vehicle brake system To enable economical production of a piston for a piston pump, the piston is made from a tubular deformed part and a closure plug, which is press-fitted with a protrusion into the deformed part. The piston has the advantage that the piston can be made wit... | 10/29/2002 |
| 6470788 | Apparatus for moving an operating element An apparatus for moving an operating element has a guide surface along which the operating element may be guided. A drive means provides a driving pulse exerted on the operating element for the movement of the operating element along the guide surface. A ... | 10/29/2002 |
| 6432557 | Metal matrix composite and piston using the same A part of a piston is composed of a metal matrix composite. The metal matrix composite is composed of a matrix of a light metal alloy and reinforcements formed of metallic fibers mixed in the matrix. The reinforcements are formed of an alloy that consists... | 08/13/2002 |
| 6386090 | Piston type compressor The object of the present invention is to propose a compressor in which rotation of a piston is prevented without affecting a big unbalanced load to the piston and the manufacture of the piston is simplified. The compressor comprises a housing having a cylinde... | 05/14/2002 |
| 6378416 | Swash plate type compressor piston wherein inner surface of hollow cylindrical section of body portion has axially extending reinforcing projections A piston for a swash plate type compressor including a head portion which includes a cylindrical body portion whose open end is closed by a closure member, and an engaging portion which is formed integrally with the head portion on the side remote from th... | 04/30/2002 |
| 6363833 | Piston for hydraulic power assist rack and pinion steering system A hydraulic power assist steering system (10) for a vehicle having steerable wheels comprises a housing (14) and a rack (16). The system also comprises a fluid motor (20) for moving the rack (16). The fluid motor (20) includes a piston (10) fixedly connec... | 04/02/2002 |
| 6341950 | Piston pump The invention relates to a piston pump, which is intended for use as a return pump for a slip-controlled hydraulic vehicle brake system. To simplify the manufacture of a piston of the piston pump, the piston includes a thin sleeve.... | 01/29/2002 |
| 6332394 | Piston for swash plate type compressor, wherein head portion includes radially inner sliding projection connected to neck portion A piston for a swash plate type compressor, including a head portion slidably fitted in a cylinder bore in a cylinder block of the compressor, a neck portion slidably engaging a swash plate of the compressor, and a connecting portion connecting the head a... | 12/25/2001 |
