Back to results
US 3,937,442 AGranted
Gate valve having O-ring seal
AssigneeDillingham Corporation
InventorsCharles H. Martin, Steven V. Brewer
Life of this patent
Estimating the term…
Abstract
In a knife gate valve, an elastomer O-ring is held in an annular groove in a face of a valve seat by cotter pins having their eyes embedded in the O-ring and their shanks extending through the valve seat and clinched over. The eyes are adhered to the O-ring by vulcanization of the O-ring.
Claims11
In a gate valve,
- an annular seat member having a plurality of holes therein spaced therearound,
- an O-ring,
- and a plurality of fastener members having head portions embedded in the O-ring and also having shank portions extending into the holes and secured to the seat member.
In a gate valve,
- a pair of parallel annular members,
- a gate member slidable between the members,
- an annular valve seat sealed to one of the annular members and having an annular groove in one face thereof, and a plurality of parallel bores extending from the groove to the opposite face of the valve seat,
- an O-ring seated in the groove,
- and a plurality of fastener members having heads embedded in the O-ring and shanks slidable in the bores.
2 more elements
Dependencies are inferred from the claim text.