Class 92/37 - Plural bellows

Subclass of Class 92 - Expansible chamber devices
Definition: Apparatus comprising two or more bellows type expansible
No. of patents: 33
Last issue date: 11/17/2009

Number	Title	Issue Date
7617762	Flexible hydraulic muscle A flexible hydraulic muscle (20) comprising a fluid port (22), bellow (24), end seal (28) and attachment ring (30). Bellow (24) also defines a retracting spring bias for generating contracting forces within muscle (20...	11/17/2009
7188481	Adjustable damper actuator An actuator for controlling the position of a damper. It is an adjustable damper actuator that can actuate a damper to have positions that are other than fully open and fully closed. The actuator has adjustable stops for attaining a partially closed or partially ope...	03/13/2007
7017468	Pneumatic pivoting device A pneumatic device for pivoting a pivotal component is articulated to a structural element by means of a joint. Hoses produced from a material of low ductility, to which compressed air can be admitted, are inserted between the pivotal component and the structural el...	03/28/2006
7003846	Vacuum and disposal system for animal feces A vacuum and disposal system for the collection and disposal of animal feces. The vacuum and disposal system consists of a vacuum source, a vacuum tube, a flexible hose, and an intake tube. The vacuum is provided by an electric motor powered by a rechargeable batter...	02/28/2006
6996874	Air jet for machine tool to clean cutting dust An air jet for a machine tool to clean cutting dust has a housing with a hole and an outlet. An eccentric member has a cam and is provided in the housing which the eccentric member is driven by a power resource of the machine tool for rotation. An annular transmissi...	02/14/2006
6957806	Airspring assembly An improved airspring assembly includes a collapsible support member disposed within the pressurizable chamber of an airspring having a flexible sidewall. The support member is configured such that it extends and collapses along a longitudinal axis of the chamber re...	10/25/2005
6484601	Bellows actuation device, specially for robotic manipulator, and method to operate said device An actuation device uses, for the active element, a flexible bellows operated by a pressurized fluid (usually, but not necessarily, at a pressure higher than the ambient one). The bellows is housed, for the most part of its length, inside a cylindrical ca...	11/26/2002
5992584	Dashpot for power cylinder This invention relates to a pneumatic power cylinder dashpot piston which formed of an elastomeric cylinder and a sleeve and having a space between the interior wall of the cylinder and the exterior wall of the sleeve, and the space is filled with a flui...	11/30/1999
5950676	Expansible bellows and pulsator device including same An expansible bellows, includes a pair of end plates attached together and sealed around their peripheries such that their inner faces confront each other to define between them an expansible chamber for containing a fluid. One end plate is formed with an...	09/14/1999
5568761	Pneumatic 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
5431015	Flexible bellows actuation system A closed loop fully self-contained actuation system for converting a mechanical input motion into a mechanical output motion, which actuates a device such as a flight control surface on an aircraft, comprises an input actuator including a first fluid pres...	07/11/1995
5224841	Pneumatic bellows pump with supported bellows tube A low contamination double bellows pump suitable for providing relatively constant pressure and delivery. The illustrated pump includes two pumping chambers with bellows arranged in opposed relationship on opposite sides of a central section. The central ...	07/06/1993
5141412	Double acting bellows-type pump A double acting, self-priming bellows-type pump has a pair of bellows that work as displacement elements arranged each in a cylinder chamber mutually and synchronously interlocked by piston rod, so that at the same time as one bellows draws in, the other ...	08/25/1992
4902206	Bellows pump A bellows pump which is disclosed herein has two bellows made of a plastic material and provided with liquid inlet and outlet ports for transferring a liquid by expanding and contracting the bellows. The bellows pump comprises cylinder cases in each of wh...	02/20/1990
4718836	Reciprocating completely sealed fluid-tight vacuum pump A completely dry fluid-tight reciprocating vacuum pump comprises one or more pumping chambers defined between two rigid parts which face one another in the axial direction. One is reciprocated in a straight line relative to the other. They are connected t...	01/12/1988
4646624	Differential pressure sensor Sensed pressures are applied to a differential pressure sensor such that one-half the sensed pressure drop is applied to each of a pair of redundant pistons. Failure of one of a pair of bellows which seal opposite faces of the pistons from one another eff...	03/03/1987
4531450	Multi-stage actuator A two-stage actuator comprises a pair of axially aligned bellows molded from a thermoplastic material and connected at their adjacent ends by a molded link section integral with the bellows. The other end of one of the bellows is designed to be connected ...	07/30/1985
4502280	Hydraulic applications An apparatus that controls movement of an arm through a gaseous or liquid fluid. The apparatus incorporates a plurality of longitudinally extensible hose members that expand and contract their respective lengths responsive to introduction and withdrawal, ...	03/05/1985
4494693	Fluid actuated thermal compensator with adjustable stroke characteristics An adjustable liquid thermal compensator mechanism which provides both an actuation end attached to an expandible volume portion of a liquid chamber and a manually controlled adjustable volume portion that is used to calibrate the stroke of the compensato...	01/22/1985
4488473	Fluid-actuated ram A working head is adapted to impart reciprocal motion under a predetermined amount of force to a plunger through a working and return cycle and at a controllable rate of speed. A fluid circuit includes delivery and return lines extending between a source ...	12/18/1984
4488592	Oscillating coolant pump An oscillating coolant pump includes a pair of opposed bellows mounted to reciprocate in a housing for moving a volume of fluid through a heat exchanger and an electronics package. The pump functions without the use of check valves....	12/18/1984
4449546	Controller with adjustable proportionality range A controller with adjustable proportionality range wherein a ring is acted upon by a pressure differential in measuring unit formed as, for example, pairs of bellows or the like. The measuring units have axes of effectiveness which are perpendicular to ea...	05/22/1984
4364325	Passive controlled buoyancy apparatus A passive near neutral buoyancy platform includes a structure housing a series of gas-filled cells, restrained in their maximum volume regardless of the internal charge pressure, and collapsible in character when external pressure exceeds the charge press...	12/21/1982
4311057	Hermetic seal for a shaft An hermetic seal 10 for a linear rod 12 having a portion thereof projected axially through a port 20 defined in a wall for a pressure chamber 14 and supported thereby for omni-directional motion. The seal is characterized by a resilient, impervious, cylin...	01/19/1982
4308788	Fluid pressure responsive apparatus A differential pressure unit having overrange valves loosely mounted on a valve stem connected between the ends of a respective pair of movable bellows ends. A pair of spiral range springs bias both valves toward open positions. The valves include annular...	01/05/1982
4282800	Fluid pressure actuator This invention relates to fluid pressure servo motors having two operatively independent fluid chambers, each chamber having a piston means therein movable in response to a fluid pressure differential so as to alter in use a two position device from one t...	08/11/1981
4196932	Bottom discharge gate and actuating mechanism A hopper gate and pneumatic actuating mechanism for controlled discharge of bulk materials from a bottom-unloading vehicle are described. The hopper gate comprises an arcuate closure plate pivotally mounted by wedge shaped end plates below a rectangular h...	04/08/1980
4179244	Rotary low pressure air displacement pump A low pressure air displacement pump including one or more cylinders or bellows powered by rotary or reciprocating motivation means. This device employs two or more bellows radially disposed and activated by a singular rotary source of power which imparts...	12/18/1979
4154272	Laminated board press A device for separating the platens of a press so that wooden blanks in an unpressed form can be readily loaded therebetween. The device includes outwardly extending arms carried on the corners of each of the platens. Pneumatically operated bellows are pr...	05/15/1979
4122756	Vapor engine A vapor engine using a refrigerant as its working medium and having a number of bellows each forming an expansion chamber which receives the working medium and changing its volume under the influence of the pressure exerted by the vaporized working medium...	10/31/1978
4027481	Fluid pressure responsive transducer apparatus A fluid pressure transducer device including first fluid pressure responsive means and second fluid pressure responsive means which together define a sealed volume of fluid. The first fluid pressure responsive means is exposed to first and second input fl...	06/07/1977
4026110	Device for temperature compensation in a pressure medium circuit A device for compensating temperature dependent volume variations in a closed pressure medium system where at least two variable volume members are connected via a pipe to each other for transfer of movement between each other. At least one of the movemen...	05/31/1977
3990476	High temperature gas chromatograph valve A rotary control valve which is actuated by a steel bellows mechanism for use in a gas chromatograph. The steel bellows mechanism changes the valve positions as required by the gas chromatograph operation. An improved spring design provides an even pressu...	11/09/1976

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Class 92/37 - Plural bellows