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US6264450: Flexible vane pump

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Filing Information

Inventor(s) Keith F. Woodruff ·
Assignee(s) None listed in document.
Attorney/Agent(s) Mark P. Stone ·
Primary Examiner Thomas Denion ·
Assistant Examiner Theresa Trieu ·
Application Number US9482652
Filing date 01/13/2000
Issue date 07/24/2001
Predicted expiration date 01/13/2020
U.S. Classifications 418/153  · 415/140  · 418/259  · 415/141  · 418/156  · 416/240  · 416/134.R  · 416/135  · 418/154  ·
International Classifications --
Kind CodeB1
International Classifications 418153 · 418154 · 418156 · 418259 · 415141 · 415140 · 416240 · 416134 R · 416135 ·
19 Claims, 4 Drawings


Abstract

A pump has a rotor with two or more flexible vanes forming one or more compartments between adjacent vanes. The rotor is mounted offset relative to a rotor sleeve such that the volume of the compartments varies as the rotor rotates in the sleeve. Incoming fluid is supplied to the compartments along a plane perpendicular to the plane of rotation of the vanes. Fluid is discharged from the compartments through discharge slots in the sleeve leading into a discharge outlet which is tangential relative to the plane of rotation of the vanes. Each flexible vane is formed from at least two thin leaf springs separated by a layer of laminate and joined to a shoe which engages the inner surface of the sleeve as the rotor rotates. The pump in accordance with the present invention is energy efficient and uses significantly less power than comparable known devices.

Independent Claims | See all claims (19)

  1. 1. A pump comprising: a rotor housing; a rotor mounted in said rotor housing for rotation therein along a predetermined plane of rotation; said rotor housing defining an inlet end adapted to be coupled in fluid flow relationship to fluid inlet means for introducing fluid into said rotor housing; said inlet end of said rotor housing being arranged relative to said fluid inlet means such that the flow of fluid into said rotor housing is along a plane substantially perpendicular to said predetermined plane of rotation of said rotor; said rotor defining an outer surface tapering outwardly in a direction away from said inlet end of said rotor housing.
  2. 5. A pump comprising: a rotor housing; a rotor mounted in said rotor housing for rotation therein along a predetermined plane of rotation; said rotor housing defining an inlet end adapted to be coupled in fluid flow relationship to fluid inlet means for introducing fluid into said rotor housing; said inlet end of said rotor housing being arranged relative to said fluid inlet means such that the flow of fluid into said rotor housing is along a plane substantially perpendicular to said predetermined plane of rotation of said rotor; wherein said rotor is mounted in said rotor housing such that a central axis of said rotor is offset from a central axis of said rotor housing.
  3. 14. A pump comprising: a rotor housing, a rotor mounted for rotation along a predetermined plane of rotation in said rotor housing; said rotor being mounted in said rotor housing such that a central axis of said rotor is offset from a central axis of said rotor housing; said rotor housing having a plurality of vanes extending outwardly therefrom; each of said plurality of vanes being formed, at least in part, from a resilient material; each of said plurality of vanes having a remote end engaging an inner surface of said rotor housing; said rotor housing having an inlet end adapted to be coupled in fluid communication with fluid inlet means; said rotor having an outer surface which is tapered outwardly in a direction away from said inlet end of said rotor housing.
  4. 17. A vane for use in a pump, said vane adapted to extend from a rotor mounted for rotation within a rotor housing, said vane having a remote end adapted to engage an inner surface of said rotor housing, said vane comprising at least two separate resilient elements.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US1426954* GEN ELECTRIC Brooks Aug 1922
US2442783* US SEC WAR Senn Jul 1948
US2455194* GRAY RUMSEY LILLIAN Rumsey Nov 1948
US2766964* ALMQUIST NILS T Almquist et al. Oct 1956
US2899902* Bandli et al. Aug 1959
US3053190* MINNESOTA RUBBER CO Carlson Sep 1962
US3164098* WESTERN BRASS WORKS Sully Jan 1965
US3886764* ROVAC CORP Edwards Jun 1975
US4032270* Borg-Warner Corporation Sheth et al. Jun 1977
US4392779* Brunswick Corporation Bloemers et al. Jul 1983
US4462755* The United States of America as represented by the Secretary of the Navy Ogle et al. Jul 1984
US4863344* STEFANINI DANIEL Stefanni Sep 1989

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
JP58124081*CATERPILLAR MITSUBISHI LTDJul 1983
* cited by examiner

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