Contractile actuated bellows pump

Patent 6059546 Issued on May 9, 2000. Estimated Expiration Date:

January 26, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3092821

3791768

Fuel injection pumping apparatus
Patent #: 3936244
Issued on: 02/03/1976
Inventor: Drori

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Inventor: Rogen

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Inventors

Application

No. 237465 filed on 01/26/1999

US Classes:

417/534, Chambers formed at opposite ends of rectilinearly moving pumping member417/375, Fluid motor417/393, With additional unitary common pumping and motor working member417/473Plural bellows

Examiners

Primary: Freay, Charles G.
Assistant: Evora, Robert Z.

Attorney, Agent or Firm

Bromberg & Sunstein LLp

Foreign Patent References

0 709 573 A1 EP. 05/19/1996
WO 96/34637 WO. 11/19/1996

International Class

F04B 043/06

Abstract

A pump for impelling a fluid includes a first variable volume, the first variable volume having a first inlet for allowing the influx of the fluid into the first variable volume and a first outlet for allowing the efflux of the fluid out of the first variable volume and a first membrane defining at least a portion of the first variable volume. The pump also includes a first contractile actuator, for displacing the first membrane from a first position to a second position in such a manner as to vary the first variable volume and a second contractile actuator, for restoring the first membrane from the second position to the first position in such a manner as to vary the first variable volume. A first check valve is coupled to the first inlet for regulating the influx of fluid into the first variable volume through the first inlet and a second check valve is coupled to the first outlet for regulating the efflux of the fluid out of the first variable volume through the first outlet. In a preferred embodiment, at least one of the first and second contractile actuators is a linear actuator.