Class 92/243 - Oppositely facing

Subclass of Class 92 - Expansible chamber devices
Definition: Apparatus in which the spaced lips extend in opposite directions
No. of patents: 22
Last issue date: 12/20/2005

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Number	Title	Issue Date
6976609	Container with seal on the container lid The invention relates to a container for the storage and dispensing of paste-like or fluid masses, including a container body with side walls, an upper opening, a container lid, engaging the side walls from above, by means of a collar on the lid and sealing the uppe...	12/20/2005
6960195	Metering receptacle A metering receptacle has an elongate hollow body which at one end has a closable exit opening, and which at the other end is closable by way of a plastic plunger stopper. The plunger stopper is at the same time longitudinally displaceable in the hollow body by way ...	11/01/2005
6807897	Hydraulic piston and process for its surface treatment The present invention relates to a hydraulic piston and a process for its surface treatment in order to improve above all the wear resistance and corrosion resistance at the surface of the piston. As a favorable manufacturing process for the surface treatment of an ...	10/26/2004
5947001	Molded piston A molded piston includes a base plate, having a plurality of holes, and a polymeric material molded around the base plate and extending through the holes so as to form a mechanical bond between the base plate and the polymeric material. The molded piston ...	09/07/1999
5363744	Accumulator piston having multiple elastomeric seals An accumulator piston is formed as a two-piece plastic molding for simplifying its construction and for cost reduction and weight reduction purposes. The piston has a radially stepped construction in which each step includes a radial flange carrying an an...	11/15/1994
4817913	Flushometer relief valve This invention relates to a flexible diaphragm assembly for use in a flush valve having a hollow body, an inlet, an outlet, a valve seat formed in the body between the inlet and outlet, and an operating handle assembly. The diaphragm assembly includes a d...	04/04/1989
4813343	Ringless piston construction An improved ringless piston construction having particular use in a closed fluid system. The piston includes a metal core, which is attached to a piston rod, and a resilient outer member is secured to the core and is formed from a material, such as nitril...	03/21/1989
4743033	Dynamic seal assembly for piston and cylinder operating in subterranean wells A dynamic seal for effecting the sealing of a piston which is axially movable in a cylinder bore comprising a primary sealing element formed of a non-elastomeric sealing material having a hub portion secured to the piston element and an outwardly flaring ...	05/10/1988
4696223	Pneumatic pressure actuator A pneumatic pressure actuator including a cylinder assemblage having a pair of metallic cylinder heads and a fiberglass cylinder casing held together by a plurality of tie bolts and nuts. A piston and piston rod reciprocally movable within the cylinder as...	09/29/1987
4676143	Piston seal device for reciprocating compressor A piston seal device for a reciprocating compressor, having a piston slidably mounted in a cylinder bore and having a circumferential groove, and a resilient piston ring fitted in the circumferential groove of the piston and sealingly engageable with the ...	06/30/1987
4540352	Pendular piston pump having a cup-shaped sealing element A pump comprises a housing member bounding an elongated cylinder bore, a piston member received in the cylinder bore for reciprocation substantially longitudinally thereof, a drive for the piston member, and a sealing arrangement between the piston member...	09/10/1985
4521027	Double flange sealing member for single action piston pump A one-piece, self-lubricating, thermoplastic sealing member suitable for a single action piston pump, the sealing member comprising a tubular shaped body, a peripheral portion of which is radially cut into two flanges of preselected length and thickness. ...	06/04/1985
4515378	Double cup sealing member for double action piston pump A one-piece, self-lubricating, thermoplastic sealing member suitable for a double action piston pump, the sealing member comprising a tubular shaped body, a peripheral portion of which is radially cut into two flanges of substantially equal length and thi...	05/07/1985
4492252	Reversible valve for reversible refrigeration cycle A reversible valve for reversible refrigeration cycle. The valve means used therein is a hollow cylindrical body longitudinally extending within the valve body. It has a pair of inclined annular walls projecting from around the hollow cylindrical body to ...	01/08/1985
4484512	Seal, scraper, and guide for double-acting piston A double-acting piston and cylinder assembly has a piston which in turn has an outer piston surface centered on an axis, a radially outwardly open piston groove and a pair of axially oppositely facing piston ends. The cylinder has an inner surface centere...	11/27/1984
4378726	Piston designed for use with a magnetic force pickup A permanent magnet on a piston for use with a magnetic force pickup for sensing the position of the piston is locked in place between two backup rings and is seated within the washer of the piston. The washer has two inwardly extending flanges placed on t...	04/05/1983
4346647	Piston construction for reciprocating pumps A pump piston construction for mud pumps and the like incorporating a resilient sealing member that establishes a pressure enhanced seal between the piston and pump cylinder. A bearing and anti-extrusion member composed of a relatively hard and flexible f...	08/31/1982
4294164	Piston for use in pneumatically operated piston-cylinder apparatus A piston for use in pneumatically operated piston-cylinder apparatus has a disc-shaped steel core for connection with a piston rod, a sealing ring of resilient material surrounding the core and having an integral sealing lip extending from each axial end ...	10/13/1981
4214507	One-piece plastic piston A piston comprising a core molded from a rigid thermoplastic material and a seal element molded on the core from a flexible thermoplastic material to form a unitary assembly....	07/29/1980
4205595	Piston A piston for use in pneumatic cylinders includes a tubular support with flange-like parts, a reinforcement ring received in the support and having a groove on its outside circumference, a guide ring rigidly mounted in the groove, and angular packing washe...	06/03/1980
4121739	Dispenser with unitary plunger and seal construction A dispenser for precisely metering viscous fluids from a cartridge. The dispenser includes a cartridge body and a plunger having a piston head at its extremity. The plunger is unitarily configured from a plastic material, including seal rings in the pisto...	10/24/1978
4075935	Piston for pressure fluid operated cylinders A piston for pressure fluid cylinders which comprises, fixed on the piston rod, a disc member and a sleeve-like body of elastic material associated with said disc member. The sleeve-like body has an outwardly projecting annular lip, limited by an annular ...	02/28/1978

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Class 92/243 - Oppositely facing