Gate valve with positive gate stop
OwnerJose Angel Garza, Roman Chirko +2inventors
InventorsJose Angel Garza, Roman Chirko, Gabriel Tiviroli-Melchert, Joshua Duane Douglas
Life of this patent
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Abstract
A gate valve includes a valve body having a gate cavity, a bonnet mounted to the valve body over the cavity, a valve stem movably positioned in an axial stem bore in the bonnet, a gate positioned in the cavity and connected to the valve stem, a downwardly directed first stop surface fixed in position relative to the valve stem, and an upwardly directed second stop surface fixed in position relative to the bonnet. In operation, when the gate is moved downward from the open position to the closed position, the first stop surface will engage the second stop surface and thereby prevent the bottom of the gate from contacting the bottom of the gate cavity.
Claims7
A gate valve comprising:
- a valve body having opposite first and second ends, a flowbore which extends through the valve body between the first and second ends, and a gate cavity which extends from a top opening in the valve body across the flowbore;
- a bonnet mounted to the valve body over the top opening, the bonnet comprising an axial stem bore connected to the gate cavity;
- a valve stem movably positioned in the stem bore, the valve stem comprising a first end which extends into the gate cavity;
- a gate connected to the first end of the valve stem, the gate comprising a transverse through bore and being movable by the valve stem between an open position in which the through bore is aligned with the flowbore and a closed position in which the through bore is offset from the flowbore;
- a downwardly directed first stop surface which is fixed in position relative to the valve stem;
- and
- an upwardly directed second stop surface which is fixed in position relative to the bonnet;
- wherein when the gate is moved downward from the open position to the closed position, the first stop surface will engage the second stop surface and thereby prevent a bottom of the gate from contacting a bottom of the gate cavity;
- and
- wherein the second stop surface is connected to or formed integrally with the bonnet.
Dependencies are inferred from the claim text.