Gate valve
AssigneeKennedy Valve Company
InventorPaul Kennedy
Life of this patent
Estimating the term…
Abstract
In embodiments, a gate valve includes a valve body including a flow passage from a first opening to a second opening, and a gate channel having a first end intersecting the flow passage and a second end delineated by a third opening. A valve cover fits over the third opening. A cap fits over a valve cover opening. In embodiments, a valve cover includes a body with a second sealing surface protruding from a first sealing surface, both around an opening of the body. A cap has a third sealing surface to mate with the first sealing surface, and a fourth sealing surface congruent to the second sealing surface. In embodiments, a valve cover cap includes a body with a first sealing surface on an end of a wall. Pin flanges each have a pin hole having a pin hole axis oriented perpendicular to a center axis of the wall.
Claims11
A valve cover for a gate valve, the valve cover comprising:
- a body having an opening for a valve stem, a first sealing surface around the opening, and a second sealing surface extending around the opening, the second sealing surface protruding from the first sealing surface and facing radially outward;
- and
- a cap having an opening for the valve stem, the cap configured to cover the body opening, the cap having a third sealing surface configured to form a seal with the first sealing surface, the cap having a radially inward-facing surface concentric with the second sealing surface,
- the cap configured to move axially and non-rotationally relative to the body into an assembled position around the second sealing surface.
A valve cover for a gate valve, the valve cover comprising:
- a body having an opening for a valve stem, a first sealing surface around the opening, and a second sealing surface extending around the opening, the second sealing surface protruding from the first sealing surface;
- a gasket configured to fit around the second sealing surface and mate with the first sealing surface;
- and
- a cap having an opening for the valve stem, the cap configured to cover the body opening, the cap having a third sealing surface configured to mate with the gasket and form a seal with the first sealing surface and the gasket, the cap configured to move axially and non-rotationally around the second sealing surface to compress the gasket.
A valve cover for a gate valve, the valve cover comprising:
- a body having an opening for a valve stem, a first sealing surface around the opening, a second sealing surface around the opening and protruding from the first sealing surface, a first pin flange, a second pin flange, a third pin flange, and a fourth pin flange, the first pin flange having a first pin hole, the second pin flange having a second pin hole, the third pin flange having a third pin hole, the fourth pin flange having a fourth pin hole, the first pin hole in axial alignment with the second pin hole, the third pin hole in axial alignment with the fourth pin hole, the second sealing surface protruding from the first sealing surface;
- and
- a cap having an opening for the valve stem, the cap configured to cover the body opening, the cap having a hollow interior and a third sealing surface, the third sealing surface congruent with the first sealing surface, the cap configured to fit over and around the second sealing surface.
Dependencies are inferred from the claim text.