Herman E Knappe

US Patent:

44833601, Nov 20, 1984

Filed:

Mar 10, 1983

Appl. No.:

6/473988

Inventors:

Herman E. Knappe - Cedar Rapids IA
James W. Scott - Marion IA

Assignee:

Cherry-Burrell Corporation - Cedar Rapids IA

International Classification:

B08B 902
F16K 31122

US Classification:

137240

Abstract:

A double-block and vent valve having an improved actuator mechanism to allow one part of a composite valve member to be lifted separately from another. The actuator mechanism overlies the valve housing and is connected to the two valve member parts via coaxial rod and tube members. Hold-down cams normally block the upward movement of the tube member to positively lock the upper valve member part against its seat when it is desired to lift only the lower valve member part. A pair of pivotal cams are spring-biased to this blocking position where they bear against lug means carried by the tube member. A small, horizontal, fluid-actuated cylinder pivots the hold-down cams to a non-interfering position whenever it is desired to lift only the upper valve member part or to lift the composite valve member.

US Patent:

43735452, Feb 15, 1983

Filed:

Jan 26, 1981

Appl. No.:

6/228229

Inventors:

Herman E. Knappe - Cedar Rapids IA

Assignee:

Cherry-Burrell Corporation - Cedar Rapids IA

International Classification:

F16K 1120
F16K 5100

US Classification:

137240

Abstract:

A valve has an upper region connectable to a first piping system, a lower region connectable to a second piping system and an intermediate passageway therebetween which is opened and closed by a valve member which is reciprocated by an overhead actuator. The valve member has first and second members which are slidable relative to one another. In the closed position, the first and second valve members seal with spaced apart seats and define therebetween an intermediate chamber including the surface of the interior passageway between the seals. A lower valve member extending exterior of the lower region has cleaning solution inlet and outlet passageways which communicate with the intermediate chamber whereby the surfaces of the intermediate chamber may be cleaned and whereby any leakage around either of the seals is drained externally. In the open position in which the valve member is positioned in the upper region, the first and second parts are biased together and a seal is formed between the valve member parts to block communication between the piping systems, the cleaning solution passageways of the valve member and drain.