U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 6351867

Body squeegee

A hand wearable body squeegee comprising a glove portion, a concave squeegee band, and a linear squeegee band.

Newsletter  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.

 

Class 92/151 - Coaxial cylinders (150)


Subclass of Class 92 - Expansible chamber devices
Definition: Apparatus in which the cylinders are positioned end to end
No. of patents: 98
Last issue date: 11/27/2007


1      
NumberTitleIssue Date
7301118Welding gun with controller and method for using same
A welding gun assembly including a housing that defines a first chamber and a second chamber. The assembly also includes a first piston moveably disposed in the first chamber and a second piston moveably disposed in the second chamber. The assembly includes an inten...
11/27/2007
7252032Fluid actuator
A fluid actuator configured for achieving extended cycle life and reduced overall actuator height. The actuator may include a nesting arrangement between portions of the actuator to reduce overall height and provide stability. The actuator may also join movable memb...
08/07/2007
7204264High pressure capillary micro-fluidic valve device and a method of fabricating same
A freeze-thaw valve and a method of micro-machining the freeze-thaw valve is provided and includes a valve housing, wherein the valve housing defines a housing cavity and includes a housing inlet, a housing vent, a capillary tubing inlet and a capillary tubing outle...
04/17/2007
7114429Power steering assist apparatus and method of retrofitting
A power steering assembly and method of retrofitting therefore includes a housing having a cavity defined therein. A drive member extends axially into the cavity and a first piston and a second piston are received in the cavity for axial reciprocation therein. The f...
10/03/2006
7095482Multiple system vibration isolator
A vibration isolator (200) for isolating a first assembly (206) from vibration from a second assembly (208) includes a first system (202) and a second system (204) coupled to the first system (202). In one embodiment, the fi...
08/22/2006
7036423Released control release mechanism in particular for use in the space industry
The invention concerns a device forming a mechanism, in particular for use in the space industry, characterised in that it comprises in combination: two structural elements (100, 200) capable of relative displacement, locking means (300) adapted to pre...
05/02/2006
6931982Linear actuator
A rotation-preventing slide is provided for a linear actuator which includes a housing which defines an internal bore and a piston-rod assembly which linearly moves within the internal bore in response to fluid pressure. The rotation-preventing slide is connected to...
08/23/2005
6779343Air to oil intensifier
A pressure intensifier for generating a relatively large output force includes a piston driven in an advancing direction and a retracting direction. In one embodiment, two pistons are also driven to eliminate the need for a high pressure source. Another embodiment i...
08/24/2004
6731372Multiple chamber fluid mount
A fluid mount (10) for an exposure apparatus (32) includes a first subsystem (12) and a second subsystem (14). The first subsystem (12) includes a first cylinder (18) and a first piston (20). The first piston (20
05/04/2004
6688211Dual linear actuator
A dual linear actuator for allowing a tool to perform multiple actions either simultaneously or independently of one another. The dual linear actuator includes an outer tubular housing having open first and second ends and also having a bore extending the...
02/10/2004
6397892Multi-stage unloader
An unloader includes a first volume bottle with a cavity formed therein of predetermined volume, and a port in the forward end with a plug operably mounted to selectively open and close the port. A second volume bottle is stacked on the first volume bottl...
06/04/2002
6338359Dual automatic insertion device
A probe structure for inserting into and operating upon an object within a pipeline, especially a high pressure pipeline carrying liquid or gas, is characterized by two coaxial cylinders that can be either pneumatically or hydraulically actuated. A primar...
01/15/2002
6272862Retention of a gland within an actuator
An actuator having a body defining an internal cavity and a gland disposed within the cavity, the gland being secured against movement relative to the actuator body in a direction along the internal cavity by a securing element located in an opening of wh...
08/14/2001
6244563Automatic two-stage switching valve
An automatic two-stage switching valve includes a valve stem which normally closes a fluid passage by a spring force; a cylinder adopted to accommodate the valve stem; a large flow rate piston and a small flow rate piston that are provided on the valve st...
06/12/2001
6244560Blowout preventer ram actuating mechanism
A ram actuating mechanism 20 for a blowout preventer 10, the ram actuating mechanism 20 including a hydraulic booster for enhancing the ram closing force. The ram actuating mechanism 20 may be compatible for use with primary pistons 25 which include inter...
06/12/2001
6113367Oil-less/oil-free air brake compressor with a dual piston arrangement
A cylinder is divided into two chambers by a wall to receive a pair of pistons. This reduces the stroke length and correspondingly reduces the linear speed of the piston. This leads to a reduced PV factor associated with degradation and wear of the piston...
09/05/2000
6073886Constant pressure area telescoping piston and method of using same
An actuator assembly that has a constant net pressure area telescoping piston. The actuator assembly has a cylindrical housing; nesting, telescoping pistons; a central plug; an outer cap; and a vent. The cylindrical housing has an interior surface and a b...
06/13/2000
6047788Hydraulic power steering system with dual, double-acting piston-cylinder units
In a hydraulically operated steering for a motor vehicle comprising a control motor with first and second double acting piston and cylinder units arranged in axial alignment and a single piston rod extending through the first and second double acting pist...
04/11/2000
5924353Durable oil well pump of fitting ceramics cylinder
A durable oil well pump having fitted ceramic cylinders. Two metal retainers are fitted at two ends of the ceramic liner barrels. A cement or adhesive, which is resistant to pressure and temperature is placed in the annular clearance among the liner barre...
07/20/1999
5890364Master cylinder having a single service piston with compensation and damping sections
An improved compensation piston arrangement for use with a dual circuit master cylinder having a single service piston for simultaneously pressurizing a first fluid chamber and a second fluid chamber, wherein the compensation piston arrangement provides f...
04/06/1999
5865029Air/oil intensifier having multiple sensors
An intensifier type of fluid actuator includes multiple sensors for sensing various operational characteristics of the intensifier. The intensifier includes a first manifold connected by a first tube to a second manifold to define an intensifier chamber, ...
02/02/1999
5806314Pressurized cylinder and booster in a low volume pressure circuit
A pressure-driven cylinder having a piston sliding within a sealed housing chamber between a pair of opposed side-end walls in a piston chamber. At least one chamber wall has a moveable portion of an end wall integrally connected to and axially spaced awa...
09/15/1998
5778760End cap for intermediate use in cylinder assembly and method
A multiple piston and cylinder assembly is illustrated utilizing first and second transversely bifurcated segments (A) and (B) for retention by an intermediate snap ring (D) installed within a single groove (C) facilitating a sealing abutting relation bet...
07/14/1998
5727931Pump for electrically conductive coating materials
A piston pump, particularly adapted for use in a system for supplying and dispensing electrically conductive coating material, includes a pump housing having an outer wall, opposed first and second ends and a hollow interior separated into a first cavity ...
03/17/1998
5705241Fibre-composite rod
A rod with a tubular, fibre-composite wall, cut into two parts has actively controllable, pressure- and tension-generating elements which are effective in an axial direction of the rod, provided therebetween. An exterior pressure-generating element, which...
01/06/1998
5701976Hydraulic brake for transmission
In a hydraulic brake for a transmission, an assist piston, a reaction piston and a main piston are accommodated on a cylinder. The assist piston has a first acting portion in abutment against the main piston, and the main piston has a second acting portio...
12/30/1997
5662020Inchworm type of actuator
A forward-moving inching unit and a backward-moving inching unit are built in a casing (1) which is slidable relative to a guide member (b). Each of the inching units is made up of an inching piston (60), a brake piston (61) disposed in a direction opposi...
09/02/1997
5606902Linear actuator
A linear actuator has a cylinder body having a slot defined therein, a slide table, a joint connected substantially perpendicularly to a lower surface of the slide table, a pair of pistons slidably disposed in a through hole defined in the cylinder body a...
03/04/1997
5568761Pneumatic Jack
Pneumatic jack of the type comprising a rigid body (1) joined to the outer edge of a deformable membrane (2) so as to delimit with the latter a chamber of variable volume capable of being subjected to either atmospheric pressure of a negative pressure, vi...
10/29/1996
5522302Cylinder and piston assembly and method of porting
A multi-piston assembly is illustrated wherein a cylindrical housing (A) is ported through longitudinal circumferentially spaced ports (F) and (G) carried within the cylindrical housing. Porting through piston rods is thus avoided so that their cross sect...
06/04/1996
5492311Active positioning element
An active positioning element for a rubber mount, including a space surrounded by a housing, a positioning member and a working member which is designed as a spring element arranged within the space. The positioning member and the working member are movab...
02/20/1996
5468128Sealed piston pump
A sealed piston pump having in an open cavity of the pump body, a circular single-piece set formed by a central cylindrical piston. The piston is coupled by a rod to a driving member while the piston in an alternating motion along its longitudinal axis. A...
11/21/1995
5361680Pressure-intensifying type fluid pressure cylinder
In a pressure-intensifying type fluid pressure cylinder, an auxiliary cylinder chamber is provided outside a rod cover, a pressure intensifying piston is axially and slidably disposed on the outer peripheral portion of a piston rod in the auxiliary cylind...
11/08/1994
5341725Twin piston power cylinder
A power cylinder (10) has two pistons (12, 20) slidably mounted within separate cylinders (14, 22) to define inner and outer chambers (16, 18; 24, 26) within each cylinder. One or more rods (28) are coupled between the pistons. The outer chambers (18, 26)...
08/30/1994
5317954Pressure switch assembly
The present invention provides a pressure switch assembly for monitoring a source of fluid pressure. In one embodiment, the pressure switch assembly senses a variation of fluid pressure for actuation of a micro-switch to open or close an electric circuit....
06/07/1994
5265423Air-oil pressure intensifier with isolation system for prohibiting leakage between and intermixing of the air and oil
The present invention is drawn to an isolation system for separating two diverse fluid mediums from each other and, more particularly, an isolation system for prohibiting leakage of the diverse mediums around the peripheral surface of a piston movably mou...
11/30/1993
5263402Lift/slider apparatus
This invention relates to a displacing apparatus comprising a plurality of concentric tubular members concentrically disposed about a central axial member. These concentric members define a plurality of substantially closed chambers between adjacent conce...
11/23/1993
5249502Double action, dual speed and force hydraulic actuators
A hydraulic fluid Pressure-operated actuator comprises a first cylinder assembly having an output which operatively carries a second cylinder assembly such that an axial output force is effected from an output shaft of the second cylinder assembly, the ou...
10/05/1993
5228543Sealed wet disc brake for vehicles
A sealed vehicle wet disc brake has a brake housing and a piston housing which are fixedly interconnected and which receive a rotor. The two housings and rotor define an annular cavity which is sealed by appropriate rotary seals and in which is maintained...
07/20/1993
5209651Multiple engine deep well pump
A deep well pump for positioning in a bottom hole assembly and having at least one fluid pump and at least two fluid powered motors with the pump and motor pistons carried in alignment on the piston rod. The pump includes passages for delivering a power f...
05/11/1993
1      
 
Sign InRegister
Username  
Password   
forgot password?