Patent US3661357A successfully refreshed from Google Patents.
US3661357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust valve
Assignee: United States Steel Corp
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Filing: 1970-06-01
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Granted: 1972-05-09
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Expires: 1990-06-01
Abstract
Abstract A dust valve for use between the hopper of dust catching equipment and the dust disposable system includes two spaced plates having a slide plate therebetween. The slide plate has an opening which is movable into and out of alignment with the dust conveying conduits. The opening walls are so shaped as to provide a shearing action across the bottom of the top plate to prevent or lessen dust build up. The height of the space is greater than the thickness of the slide plate which is held against the bottom of the top plate by means of spring biased rollers extending into the space. The longitudinal edges of the slide plate are in contact with roller guides. The slide plate is actuated by means of two air cylinders having their piston rods attached to opposite sides of the slide plate.
Inventors
- 👤 Floyd Armstrong Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:14
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/16; F16K3/20; F16K3/205; F16K3/0254
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
A valve for controlling flow of solid materials through a conduit comprising a valve housing having two parallel surfaces with a fixed space therebetween, a slide plate mounted for longitudinal slidable movement in said space, said slide plate having a hole therein movable into and out of alignment with the opening in said conduit, a plurality of rolls mounted on said housing on the exit side of said space with their axes in a plane normal to the axis of said hole and a portion thereof extending into said space, means individually biasing said rolls toward the inlet side of said valve, and means for moving said slide plate in contact with said rolls into and out of alignment with the opening in said conduit.
Claim 2
Dependent Claim
125 words
A valve for controlling flow of solid materials through a conduit comprising a valve housing having two parallel surfaces with a fixed space therebetween, a slide plate mounted for longitudinal slidable movement in said space, said slide plate having a hole therein movable into and out of alignment with the opening in said conduit, a plurality of rolls mounted on said housing on the exit side of said space with their axes in a plane normal to the axis of said hole and a portion thereof extending into said space, means individually biasing said rolls toward the inlet side of said valve, and means for moving said slide plate in contact with said rolls into and out of alignment with the opening in said conduit.
Claim 3
Dependent Claim
56 words
A valve according to claim 1 including a plurality of rollers mounted in said housing with their axes substantially parallel to the axis of the hole in said side plate, said rollers being arranged in two lines one along each longitudinal edge of said slide plate so as to guide the slide plate in its movement.
Claim 4
Dependent Claim
56 words
A valve according to claim 1 in which said housing includes a first plate at the inlet side of said valve, a second plate at the exit side of said valve spaced from said first plate, the adjacent sides of said plates forming the said two parallel surfaces, and means holding said plates in assembled relationship.
Claim 5
Dependent Claim
94 words
A valve according to claim 3 in which said means biasing said rolls toward the inlet side of said valve includes a bracket for rotatably supporting each roll, each bracket having a hole therethrough on each end thereof, a threaded opening in said second plate in alignment with each hole in said bracket, a threaded member passing through each bracket hole into the associated plate hole, a spring surrounding each threaded member with one end bearing against the associated bracket, and means on each threaded member for supporting the other end of said spring.
Claim 6
Dependent Claim
56 words
A valve according to claim 3 including a plurality of rollers mounted in said housing with their axes substantially parallel to the axis of the hole in said side plate, said rollers being arranged in two lines one along each longitudinal edge of said slide plate so as to guide the slide plate in its movement.
Claim 7
Dependent Claim
65 words
A valve according to claim 5 in which said means holding said plates in assembled relationship includes a plurality of axially aligned holes in said first and second plates, a bushing for supporting each roller extending between the adjacent surfaces of said plates in alignment with each set of axially aligned holes, and a threaded member extending through each set of aligned holes and bushing.
Claim 8
Dependent Claim
94 words
A valve according to claim 6 in which said means biasing said rolls toward the inlet side of said valve includes a bracket for rotatably supporting each roll, each bracket having a hole therethrough on each end thereof, a threaded opening in said second plate in alignment with each hole in said bracKet, a threaded member passing through each bracket hole into the associated plate hole, a spring surrounding each threaded member with one end bearing against the associated bracket, and means on each threaded member for supporting the other end of said spring.
Claim 9
Dependent Claim
22 words
A valve according to claim 7 in which the opening in said slide plate tapers outwardly away from the entry end thereof.
Claim 10
Dependent Claim
85 words
A valve according to claim 8 in which said means for moving said slide plate includes a pair of fluid cylinders one mounted on each longitudinal side of said housing, a piston rod for each cylinder, means connecting each cylinder to said housing, means connecting the free end of a piston rod to said side plate, and an abutment on each end of said slide plate adapted to contact the opposite ends of said first and second plates to limit movement of said slide plate.
Claim 11
Dependent Claim
22 words
A valve according to claim 1 in which the opening in said slide plate tapers outwardly away from the entry end thereof.
Claim 12
Dependent Claim
85 words
A valve according to claim 3 in which said means for moving said slide plate includes a pair of fluid cylinders one mounted on each longitudinal side of said housing, a piston rod for each cylinder, means connecting each cylinder to said housing, means connecting the free end of a piston rod to said slide plate, and an abutment on each end of said slide plate adapted to contact the opposite ends of said first and second plates to limit movement of said slide plate.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |