Dual chamber orifice fitting isolation valve

Details Dual chamber orifice fitting isolation valve Dual chamber orifice fitting isolation valve

2011-01-18

2011-01-18

Hook, James F (Department: 3754)

Pipes and tubular conduits

With closures and plugs

Laterally insertable

C138S094000, C138S094300

Reexamination Certificate

active

07870873

ABSTRACT:
Apparatus and methods for operating a dual chamber orifice fitting. The dual chamber orifice fitting comprises a body having a lower chamber and a top having an upper chamber. An aperture connects the upper chamber to the lower chamber. A closure member is pivotally mounted to the fitting and pivots about a first axis between a first position and a second position. A pivot arm is rotatably mounted to the body and engages the closure member so that rotation of the pivot arm about a second axis pivots said closure member about the first axis between the first and second positions.

REFERENCES:
patent: 2050544 (1936-08-01), Robinson et al.
patent: 2448071 (1948-08-01), Anderson
patent: 2896668 (1955-05-01), Aitken
patent: 3817287 (1974-06-01), Aitken
patent: 3891146 (1975-06-01), Blazek
patent: 4177827 (1979-12-01), Smith et al.
patent: 4394826 (1983-07-01), Van Scoy
patent: 5836356 (1998-11-01), Desai
patent: 2005/0258388 (2005-11-01), Loga
PCT International Search Report dated Nov. 26, 2007 for counterpart application PCT/US2006/61647.
Written Opinion of the International Searching Authority dated Nov. 26, 2007 for counterpart application PCT/US2006/61647.

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