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

Icon_funbox Bizarre Patents

Patent No. 5979328

Vehicular Impact Signaling Device

An apparatus for the deployment of a visible plume to alert other motorists that a proximate motor vehicle has been involved in a collision.

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 417/398 - Rectilinearly reciprocating cylinder and piston-type motor


Subclass of Class 417 - Pumps
Definition: Apparatus in which the fluid motor is of the type comprising
No. of patents: 22
Last issue date: 03/25/2008


NumberTitleIssue Date
7347136Airless sprayer with hardened cylinder
An airless sprayer for paint or the like consists of an electric drive unit connected to a piston. Driven by the electric drive unit, the piston reciprocates within the cylinder, thus spraying the paint or the like. Because of the close tolerance between the piston ...
03/25/2008
7229260Oilless air motor assembly for hydraulic pumps
An oilless air motor assembly and method useable for driving hydraulic pumps and the like. The air motor assembly comprises a slide valve that moved back and forth relative to a valve sleeve situated about the slide valve. A low friction or lubricious dry seal membe...
06/12/2007
7144228Cryogenic fluid delivery system
A cryogenic fluid delivery system includes a pump having a pumping cylinder within which a sliding pumping piston is positioned. The pump also includes an actuating cylinder within which a sliding actuating piston is positioned and a supplemental linear actuator, su...
12/05/2006
7134850Fitted assembly bellows pump
In a pump employing a bellows, individual members are formed from resins and pump components including a fitted assembly formed by fitting plural members with each other form a structure unit which is tightly inserted in an external cover and constrained on the oppo...
11/14/2006
6676386Oilless air motor assembly for hydraulic pumps
An oilless air motor assembly useable for driving hydraulic pumps and the like includes a slide valve that moves back and forth relative to a valve sleeve situated about the slide valve. A low friction or lubricious dry seal member is disposed between the...
01/13/2004
6641375Pneumatically operated oil pump
A pneumatically operated oil pump comprises an outer tube for extending into an oil tank and a sucking tube moveably arranged within the outer tube. The sucking tube includes one-way valve establishing an airtight arrangement with respect to an inner wall...
11/04/2003
6589027Double acting reciprocating motor with uni-directional fluid flow
A double-acting reciprocating motor with a uni-directional fluid flow path comprises a piston disposed within a cylinder. Within the cylinder, the piston defines a first chamber between the piston and a cylinder base and a second chamber between the pisto...
07/08/2003
6485272Fluid proportioner
An improved fluid proportioner. For improved fluid flow, a body is configured to direct a first fluid wherein at least one fluid gate housing is removably fixed to the body. A bearing pressurably is fitted within the at least one fluid gate housing to sea...
11/26/2002
6435843Reciprocating pump for feeding viscous liquid
Two cylindrical pump cylinders are mounted end-to-end. A first piston is placed in the first cylinder, a second piston is placed in the second cylinder, and the pistons are interconnected. In one embodiment compressed air alternately drives the first pist...
08/20/2002
6398527Reciprocating motor with uni-directional fluid flow
A double-acting reciprocating motor with uni-directional fluid flow path comprises a piston disposed within a cylinder. A first chamber is defined by the cylinder space between the piston and a cylinder base. A second chamber is defined by the cylinder sp...
06/04/2002
6398524Magnetic bearing control device and turbo-molecular pump device
The present invention is to provide a magnetic bearing controller capable of reliably controlling the position of a floating member at a target position, even when the length of the cable connecting the magnetic bearing and the controller is changed. The ...
06/04/2002
6095766Fuel transfer pump
An improved fuel transfer pump is provided for use in transferring fuel within fuel tanks such as fuel tanks within an aircraft. The pump comprises a relatively compact and substantially modular pump assembly including a rotatably driven impeller carried ...
08/01/2000
5807083High pressure gas compressor
A low pressure compressor drives a hydraulic pump coupled to a main compressor for producing a relatively high pressure gas output. A plurality of pistons coupled to a single shaft is driven by gas from a low pressure compressor. A hydraulic piston is cou...
09/15/1998
5540136Reciprocating piston motor operating on pressure medium
The invention relates to a reciprocating piston motor. The motor comprises at least one cylinder which is closed on at least one end, a piston which is slidable in the cylinder and forms a pressure chamber with the closed end of the cylinder, a power tran...
07/30/1996
5536150Hydraulic-pneumatic stroke reversal system for pumping units, and its application in preferred embodiments
This pumping unit stroke reversal invention can be employed in various embodiments, and uses one or more resilient hydraulic-pneumatic accumulators which slow and stop each stoke, storing the kinetic energy, and returning this energy to begin and accelera...
07/16/1996
5429484Liquid feed pump particularly used for liquid medicine and liquid feed apparatus for filling of liquid medicine
A metallic diaphragm is provided within a pump chamber. This diaphragm is oscillated by a stem to Feed liquid medicine. The stem is provided with a plate and a movement of this plate, i.e., a stroke of the stem is limited by a pair of stoppers. Relative p...
07/04/1995
5275539Internal combustion engine oil pump
A lubricant pump for supplying lubricant to an internal combustion engine, the pump comprising a housing defining a pump chamber, an inlet which is adapted to communicate with a source of lubricant and which communicates with the pump chamber, and an outl...
01/04/1994
5139390Pump and method for drawing vapor from a storage tank without forcibly drawing the vapor from the tank
A vapor transfer pump for a storage tank includes a bladder and a continuously reciprocating plate disposed about the bladder. Vapor from the storage tank enters the bladder through a one way check valve set at a low pressure, and is forced out, by the co...
08/18/1992
5050482Apparatus for driving piston by fluid pressure
An apparatus for driving a piston by fluid pressure in which a piston (8) is reciprocated upward and downward by supplying and discharging pressure fluid to and from an actuation chamber (9) disposed in a cylinder (7) through a pilot valve (18) and a flui...
09/24/1991
4594971Variable fuel/oil ratio pump for two-stroke internal combustion engine
A mechanism for pumping fluid in response to pressure pulses, the mechanism comprising a fluid pump including a reciprocating piston operable to pump fluid, a rotatable eccentric wheel including a cam surface, a linkage engageable with the cam surface for...
06/17/1986
4189070Reaction injection molding machine
A machine for metering and mixing two or more liquids, which are rapidly reactive to form a solid polymer, immediately prior to the injection of the liquids into a molding machine. The machine is characterized by two or more metering cylinders into which ...
02/19/1980
3995974Internal combustion assisted hydraulic engine
This hydraulic engine utilizes two sets of hydraulic cylinders connected to a shaft so as to be alternately pressurized as the shaft is reciprocally driven by a pair of conventional internal combustion chambers. The outlets of all hydraulic cylinders are ...
12/07/1976
 
Sign InRegister
Username  
Password   
forgot password?