1
Ronald E Pelrine, Roy David Kornbluh, Scott E Stanford, Qibing Pei, Richard Heydt, Joseph S Eckerle, Jonathan R Heim: Electroactive polymer devices for moving fluid. SRI International, Beyer Weaver & Thomas, June 20, 2006: US07064472 (102 worldwide citation)

The invention describes devices for performing thermodynamic work on a fluid, such as pumps, compressors and fans. The thermodynamic work may be used to provide a driving force for moving the fluid. Work performed on the fluid may be transmitted to other devices, such as a piston in a hydraulic actu ...


2
Hensler Adolf, Hilgarth Kurt Dipl Ing: Valve arrangement for the inflation and deflation of an air cushion.. Koeflach Sportgeraete, August 21, 1985: EP0152401-A2 (37 worldwide citation)

For the inflation and deflation of an air cushion, in particular for ski boots, a pump (1) with a valve arrangement is proposed, which comprises two valves (3 and 4). The two valves (3 and 4) are arranged in such a manner that, after operation of the operating member (9) of the inlet valve (3) and a ...


3
Colgate Stirling A: Isothermal positive displacement machinery. Colgate Thermodynamics Co, April 20, 1983: GB2106992-A (37 worldwide citation)

In such machinery, e.g. a Stirling cycle heat pump, improved heat flow, and thereby thermal efficiency, is achieved by providing a large chamber wall area to chamber volume ratio through the use of bellows-like walls for the compression and expansion chambers 1 and 2. The gas chambers have movable e ...


4
John Sahiavo, Robert Garber: Air-operated high-temperature corrosive liquid pump. Hytec Flow Systems, Limbach & Limbach, March 23, 1993: US05195878 (36 worldwide citation)

A liquid pump is disclosed having a center block containing inlets and outlets for liquid to be pumped and air to operate the pump with associated valves for liquid and air. A pair of opposed cylinders are provided on opposite sides of the center block and each containing a collapsible bellows conne ...


5
Sacks Alvin H: Device for evacuating containers. June 27, 1972: US3672114 (36 worldwide citation)

A manually-actuated pump is attached to the lid of a container for substances such as ground coffee, which deteriorate in the presence of air. The pump consists of a cylindrical bellows which can be compressed toward the lid and extended. A first flap-type check valve is installed on said lid and a ...


6
Keith Patrick Heaton, Ian Hardman: Reduced pressure delivery system having a manually-activated pump for providing treatment to low-severity wounds. KCI Licensing, August 30, 2011: US08007257 (34 worldwide citation)

A manually-activated reduced pressure treatment system includes a substantially rigid housing, and an end cap slidingly received by the housing. An inner chamber is disposed between the end cap and housing, and a volume of the inner chamber is variable in amount depending on the position of the end ...


7
Takao Nakazawa, Jisaburo Naito, Hiroyuki Horiki, Tutomu Kawashima: Bellows pump. Haluna Kabushiki Kaisha, Nisso Engineering Kabushiki Kaisha, Oblon Spivak McClelland Maier & Neustadt, February 20, 1990: US04902206 (24 worldwide citation)

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 which the bellows is vertically expandably and ...


8
Tsutomu Tomatsu: Compressor, spray apparatus using the compressor, and air brush for the spray apparatus. Pilot Ink, Sughrue Mion Zinn Macpeak & Seas, February 18, 1992: US05088903 (22 worldwide citation)

A small and lightweight compressor has a motor which generates rotational drive which is converted into reciprocating movement to actuate an air compressing mechanism to thereby discharge compressed air. Three or more air compressing members are successively operated with a phase difference therebet ...


9
Heiner Ophardt, Ali Mirbach: Foam pump with bellows spring. Gotohti com, Thorpe North & Western, July 2, 2013: US08474664 (19 worldwide citation)

A spring member extending from a first end to a second end about a longitudinal axis, the spring having an inherent bias to assume an extended position with a first end spaced from the second end along the axis, the spring assuming compressed positions when compressed by forces applied parallel to t ...


10
Tsuyoshi Endo: Handy tube pump. Jordan and Hamburg, November 12, 1985: US04552515 (19 worldwide citation)

A tube pump for use in pumping a liquid from one place, such as a tank, to another, such as a vessel, the tube pump comprising a first tube for sucking a liquid from a tank; a second tube for allowing the sucked liquid to discharge therethrough; a connecting chamber located in the joint of the first ...