Low restriction, normally open valve construction having a deformable bladder

Patent 4111221 Issued on September 5, 1978. Estimated Expiration Date:

January 28, 1996. 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

2557448

2781051

3013571

3106131

3422832

3478760

3890994

Inventor

Olsen, Charles R.

Application

No. 05/653274 filed on 01/28/1976

US Classes:

137/67, DESTRUCTIBLE OR DEFORMABLE ELEMENT CONTROLLED137/625.48, Reciprocating valve unit251/191, Packing expands with closing251/61, Flexible wall expansible chamber reciprocating valve actuator251/61.1, Flexible wall valves fluid251/901, CURTAIN TYPE VALVES89/1.14EXPLOSIVE OPERATED APPARATUS (E.G., EXPLOSIVE DOOR HINGE, TOOL EXPLOSIVELY ACTUATED, BAND RELEASE, EXPANSION OF TUBE, CABLE CUTTER, EXPLOSIVELY OPERATED SPLITTING WEDGES)

Examiners

Primary: Schwadron, Martin P.
Assistant: Gerard, Richard

Attorney, Agent or Firm

McCormick, Paulding & Huber

International Classes

F15B 15/00 (20060101)
F15B 15/19 (20060101)
F16K 17/40 (20060101)
F16K 17/00 (20060101)
F16K 7/18 (20060101)
F16K 7/00 (20060101)
F16K 31/00 (20060101)

Abstract

A normally open valve construction utilizes a valve housing defining a fluid passageway extending through the housing between at least two ports, and an expandible, metallic bladder within the housing. The bladder is mounted in non-obstructing relationship with the fluid passageway when the valve is open and is expanded across the passageway in flow-obstructing relationship when the valve is closed. The bladder in the expanded condition has a generally tubular configuration and is closed at one end. In the non-expanded condition, one portion of the tubular configuration is folded coaxially within an adjacent portion to shorten its axial length and to remove all portions of the bladder from the fluid passageway. A pyrotechnic squib or other fluid pressure generator discharges within the tubular configuration to extend the bladder into the fluid passageway and close the valve.