US3578283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arcuate blade gate valve
Assignee: ARMSTRONG JONES Ltd
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Filing: 1969-04-24
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Granted: 1971-05-11
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Expires: 1989-04-24
Abstract
Abstract A gate valve of the type commonly used to control the flow of pulverulent or granular material moving by gravity from hoppers and the like. The valve has an arcuate valve plate and the valve casing is formed with a deflector consisting of an integral inwardly projecting protuberance serving to prevent particles of the granular material from lodging between the inner edge of the valve plate and the opposite wall which might prevent full closure of the valve.
Inventors
- 👤 William H Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:28
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/54; B65D90/58; B65D90/582
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
217 words
A gate valve assembly for controlling the flow of granular material from a hopper or the like, comprising a rectangular valve casing defining a flow passage being open at its upper end to said hopper and having an outlet opening at its lower end, an arcuate valve plate carried in a slot in one side of said casing and adapted to move in and out of said slot as to vary the size of said flow passage, a first pair of arm members pivotally fixed at their lower ends to the outside of said casing and fixed at their upper ends to the outer end of said valve plate, said arm members being dimensioned so that rotation thereof about their pivotally fixed lower ends causes said valve plate to move in and out of said slot, means for rotating said arms, and a deflector fixed to and projecting inwardly from the plane of the inside of the casing wall opposite the casing wall having said slot and immediately above the line at which the innermost edge of said valve plate contacts said opposite wall, said deflector serving to prevent particles of said granular material from lodging between the inner edge of said valve plate and said opposite wall which might prevent full closure of said valve plate.
Claim 2
Dependent Claim
217 words
A gate valve assembly for controlling the flow of granular material from a hopper or the like, comprising a rectangular valve casing defining a flow passage being open at its upper end to said hopper and having an outlet opening at its lower end, an arcuate valve plate carried in a slot in one side of said casing and adapted to move in and out of said slot as to vary the size of said flow passage, a first pair of arm members pivotally fixed at their lower ends to the outside of said casing and fixed at their upper ends to the outer end of said valve plate, said arm members being dimensioned so that rotation thereof about their pivotally fixed lower ends causes said valve plate to move in and out of said slot, means for rotating said arms, and a deflector fixed to and projecting inwardly from the plane of the inside of the casing wall opposite the casing wall having said slot and immediately above the line at which the innermost edge of said valve plate contacts said opposite wall, said deflector serving to prevent particles of said granular material from lodging between the inner edge of said valve plate and said opposite wall which might prevent full closure of said valve plate.
Claim 3
Dependent Claim
53 words
A valve assembly as claimed in claim 1, in which said deflector consists of an integral inwardly projecting triangular in cross section protuberance on the lower end of a liner plate fixed to said opposite casing wall above the line along which the inner end of said valve plate contacts said opposite wall.
Claim 4
Dependent Claim
74 words
A valve assembly as claimed in claim 2, further including a second deflector fixed to the casing wall having said slot, said second deflector consisting of a protuberance of triangular cross section extending inwardly from a liner plate fixed to the casing wall, said protuberance being located immediately above said valve plate as to prevent particles of said material from jamming between the upper surface of said valve and the top of said slot.
Claim 5
Dependent Claim
35 words
A valve assembly as claimed in claim 3, in which said deflector consists of an integral triangular in cross section protuberance extending inwardly from a linear plate fixed to the casing wall having said slot.
Claim 6
Dependent Claim
48 words
A valve assembly as claimed in claim 3, in which the inside surface of said opposite wall of said casing is lined with a tough and resilient liner whereby a tight seal between the innermost edge of said valve plate and said opposite casing wall may be gained.
Claim 7
Dependent Claim
34 words
A valve assembly as claimed in claim 5, in which the upper edge of said slot is provided with a wiper of resilient material which bears against the upper surface of said valve plate.
Claim 8
Dependent Claim
34 words
A valve assembly as claimed in claim 6, in which the lower edge of said slot is provided with a wiper or resilient material which bears against the lower surface of said valve plate.
Claim 9
Dependent Claim
98 words
A valve assembly as claimed in claim 1, including power means for opening and closing said valve assembly, comprising at least one air cylinder pivotally fixed at one end to the outside surface of the slotted wall of said casing and having the outer end of its piston rod fixed to a crossbar extending between a pair of integral auxiliary arms extending outwardly and downwardly from said first pair of arm members whereby operation of said cylinder will cause said arm members and said valve plate to pivot about a pivot axis being coaxial with said pivot rod.
Claim 10
Dependent Claim
101 words
A valve assembly as claimed in claim 8, further including means for presetting the amount said arm members may pivot about said pivot axis so that the size of the passageway through said casing may be preset, said presetting means consisting of a threaded rod pivotally attached at its upper end to the outside surface of said slotted casing wall adjacent the upper end thereof and projecting through a U-shaped bracket fixed to said crossbar, and further including an adjustable screw stop threaded on the lower end of said threaded rod whereby it may be manually adjusted relative to said rod.
Claim 11
Dependent Claim
122 words
A valve assembly as claimed in claim 1, in which said valve assembly is adapted for maNual operation and includes handle means fixed to the outer edge of said valve plate, and further includes means for presetting the amount said arm members may pivot about said pivot axis so that the size of the passageway through said casing may be preset, said presetting means consisting of a bar pivotally fixed at its upper end to the outside surface of said slotted casing wall adjacent the upper end thereof and having a plurality of slots in its lowermost edge and adapted to engage a crossbar extending between a pair of auxiliary arms extending outwardly and downwardly from said first pair of arm members.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |