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US 5,685,338 AGranted
Shut-off device
AssigneeBrdr. Christensens Haner A/S
InventorWerner Trunk
Life of this patent
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AssigneeBrdr. Christensens Haner A/S
InventorWerner Trunk
Estimating the term…
A shut-off device, such as a valve or a cock, for pipelines and comprising a casing provided with a flow passageway. The casing is provided with an inlet and an outlet and at least one shut-off member provided with a cavity, the member being movable between a position in which the flow passageway is open and a position in which the flow passageway is closed. An auxiliary chamber is arranged in the casing and communicates with the cavity of the shut-off member. The auxiliary chamber is defined by a separate, almost non-resilient wall portion abutting an abutment face on the wall of the casing. A pressure-relieving passageway formed in the wall of the casing is arranged between an abutment face at the auxiliary chamber and the inlet or outlet of the shut-off device. As a result, a shut-off device having more simple structure than known shut-off devices is obtained.
A shut-off device for pipelines and comprising a casing provided with an abutment face and a flow passageway wherein the casing has an inlet and an outlet and at least one shut-off member provided with a through-going cavity and movable between a position in which the flow passageway is open and a position in which the flow passageway is closed, and wherein an auxiliary chamber is arranged in the casing and communicating with the cavity of the shut-off member, sealing means being provided between the shut-off member and the casing, wherein the auxiliary chamber is defined by a separate, substantially non-resilient wall portion abutting said abutment face, a pressure-relieving passageway being formed in the casing between the abutment face and the inlet or outlet of the shut-off device.
Dependencies are inferred from the claim text.