Gate valve

Claim 2

A low-profile swinging gate valve in which a curved blade moves in an arcuate path into flow controlling relation to a passageway, comprising a valve housing having a pair of sidewalls, a front wall and a backwall and being open at the top and the bottom thereof defining a flow passageway therethrough, a pair of elongated support members each having one end supported on said housing at one of said sidewalls and extending to positions above said passageway, means in said backwall defining a transverse blade slot, an arcuate blade received in said housing through said slot with its concavity facing toward said support member ends, a pair of blade arms having lower ends joined to said blade exteriorly of said housing adjacent said slot and having upper ends pivotally mounted on said support members and providing for said arcuate movement of said blade through said slot into flow controlling relation to said passageway, and operator means connected to said arms for controlling the movement of said blade.

Claim 3

The valve of claim 1 in which said support members extend in diverging relation from said housing and in which said blade support arms are similarly angulated outwardly so as to receive therebetween a hopper or the like which has a greater dimension in width than said passageway.

Claim 4

The valve of claim 1 further comprising a flexible blade wiping seal member supported on the inside surface of said rear wall and having a depending portion in wiping engagement with the upper surface of said blade.

Claim 5

The valve of claim 3 further comprising a pair of sidewall seals received respectively on the inside surfaces of said sidewalls above said blade and having lower sealing surfaces formed with a curvature conforming to that of the upper surface of said blade in the closed position of said blade for engaging said blade upper surface and sealing said blade at said sidewalls.

Claim 6

The valve of claim 4 further comprising a blade end seal received on the inside surface of said front wall and having a lower edge portion adapted to be engaged by said blade in the closed position thereof.

Claim 7

The valve of claim 1 in which said operator means comprising a pair of cylinders positioned adjacent said sidewalls and connected between said valve housing and said blade arms for effecting said arcuate movement of said blade about said support members.

Claim 8

The valve of claim 1 in which said valve-housing walls are defined by channel-shaped members having outwardly extending upper and lower flanges defining respectively peripheral valve-mounting flanges.

Claim 9

A swinging gate-type valve for controlling the flow of flowable dry particulate material or the like in which a curved blade moves in an arcuate path into flow controlling relation to a passageway, comprising a valve housing having a pair of sidewalls, a front wall and a backwall forming a flow passageway therethrough, a pair of elongated support members each having one lower end connected to said sidewalls and extending upwardly and outwardly in mutually diverging relation, means in said backwall defining a transverse blade slot, an arcuate blade received in said housing with a portion thereof extending through said blade slot and having a width generally corresponding to the transverse space between said sidewalls and a length which exceeds the length between said front and backwalls so as to be positionable in flow blocking relation to said passageway with a portion thereof extending exteriorly of said housing through said backwall and having its concavity facing upwardly toward said support members, a pair of outwardly angulated blade support arms having lower ends joined to said blade at said exterior portion and having upper ends pivotally mounted adjacent the remote ends of said support members and defining with said support Members an included space which substantially exceeds in width the width of said flow passageway, said arms providing for said arcuate movement of said blade through said slot into flow blocking and flow permitting relation to said passageway, and valve operator means having a connection to said blade arms providing for said arcuate blade movement.

Claim 10

A swinging gate-type valve for controlling the flow of flowable dry particulate material or the like in which a curved blade moves in an arcuate path into flow controlling relation to a passageway, comprising a valve housing having a pair of sidewalls, a front wall and a backwall forming a flow passageway therethrough, a pair of elongated support members each having one lower end connected to said sidewalls and extending upwardly and outwardly in mutually diverging relation, means in said backwall defining a transverse blade slot, an arcuate blade received in said housing with a portion thereof extending through said blade slot and having a width generally corresponding to the transverse space between said sidewalls and a length which exceeds the length between said front and backwalls so as to be positionable in flow blocking relation to said passageway with a portion thereof extending exteriorly of said housing through said backwall and having its concavity facing upwardly toward said support members, a pair of outwardly angulated blade support arms having lower ends joined to said blade at said exterior portion and having upper ends pivotally mounted adjacent the remote ends of said support members and defining with said support Members an included space which substantially exceeds in width the width of said flow passageway, said arms providing for said arcuate movement of said blade through said slot into flow blocking and flow permitting relation to said passageway, and valve operator means having a connection to said blade arms providing for said arcuate blade movement.

Claim 11

A swinging gate-type valve for controlling the flow of flowable dry particulate material or the like in which a curved blade moves in an arcuate path into flow controlling relation to a passageway, comprising a valve housing having a pair of side channel members with the flanges thereof extending outwardly and the central web portion thereof defining valve sidewalls, and a front channel member and a corresponding back channel member joined with said side channel members and with the flanges thereof also extending mutually outwardly and the central web portions thereof defining respectively the front and backwall of said valve, said channel members defining a flow passageway therethrough, a pair of angulated elongated support members each having one lower end connected to said side channels at said flanges and extending upwardly and outwardly in mutually diverging relation, means in said backwall defining a transverse blade slot, an arcuate blade received in said housing with a portion thereof extending through said blade slot and having a width generally corresponding to the transverse space between said sidewalls and a length which exceeds the length between said front and backwalls so as to be positionable in flow blocking relation to said passageway with a portion thereof extending exteriorly of said housing through said backwall and having its concavity facing upwardly toward said support members, a pair of outwardly angulated blade support arms having lower ends joined to said blade at said exterior portion and having upper ends pivotally mounted adjacent the remote ends of said support members and defining with said support members therebetween an included space which substantially exceeds in width of said flow passageway, said arms providing for said arcuate movement of said blade through said slot into flow blocking and flow permitting relation to said passageway, and valve operator means having a connection to said blade arms providing for said blade movement.

Claim 12

A swinging gate-type valve for controlling the flow of flowable dry particulate material or the like in which a curved blade moves in an arcuate path into flow controlling relation to a passageway, comprising a valve housing having a pair of side channel members with the flanges thereof extending outwardly and the central web portion thereof defining valve sidewalls, and a front channel member and a corresponding back channel member joined with said side channel members and with the flanges thereof also extending mutually outwardly and the central web portions thereof defining respectively the front and backwall of said valve, said channel members defining a flow passageway therethrough, a pair of angulated elongated support members each having one lower end connected to said side channels at said flanges and extending upwardly and outwardly in mutually diverging relation, means in said backwall defining a transverse blade slot, an arcuate blade received in said housing with a portion thereof extending through said blade slot and having a width generally corresponding to the transverse space between said sidewalls and a length which exceeds the length between said front and backwalls so as to be positionable in flow blocking relation to said passageway with a portion thereof extending exteriorly of said housing through said backwall and having its concavity facing upwardly toward said support members, a pair of outwardly angulated blade support arms having lower ends joined to said blade at said exterior portion and having upper ends pivotally mounted adjacent the remote ends of said support members and defining with said support members therebetween an included space which substantially exceeds in width of said flow passageway, said arms providing for said arcuate movement of said blade through said slot into flow blocking and flow permitting relation to said passageway, and valve operator means having a connection to said blade arms providing for said blade movement.