Patent CA1026441A successfully refreshed from Google Patents.
Patent US3917223A successfully refreshed from Google Patents.
US3917223A
Expired / Lapsed
US
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Slide valve having adjustable packing
Assignee: Sistag Maschinenfabrik Sidler Stalder AG
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Filing: 1972-07-24
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Granted: 1975-11-04
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Expires: 1992-07-24
Abstract
Abstract A slide valve comprises a valve housing having a transverse opening defining a flow passage and a slide valve in the housing which is movable upwardly and downwardly to open and close said flow passage. A compressible packing bears against at least one face of the slide preferably at the location of the parting plane between two parts making up the housing. The housing includes an adjustable screw member which extends inwardly from the exterior for the purpose of adjusting the compression on the packing and the force upon which it acts against the slide.
Inventors
- 👤 Hans Sidler
- 👤 Stalder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:54
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0281; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
166 words
A slide valve comprising a valve housing having a transverse opening defining a flow passage, a slide valve inset housing movable back and forth to open and close said flow passage, a compressible packing means bearing at least against one face of said slide, and an adjustment member extending into said housing and bearing against said packiNg means and being adjustable to move said packing means to apply a predetermined pressure against said slide, said packing means including a hollow bar of elastomeric material which is divided in its central transverse plane to define a cavity, a compressible packing material in said cavity, said adjustment member being engageable with said compressible packing material, and a sealing pad disposed between said adjustment member and said compressible packing material, said hollow bars projecting beyond each end of said slide valve, said valve comprising a flat plate, said hollow bars having a semicircular portion at each end, a similarly partly circular insert arranged between said bar semicircular end portions.
Claim 2
Dependent Claim
166 words
A slide valve comprising a valve housing having a transverse opening defining a flow passage, a slide valve inset housing movable back and forth to open and close said flow passage, a compressible packing means bearing at least against one face of said slide, and an adjustment member extending into said housing and bearing against said packiNg means and being adjustable to move said packing means to apply a predetermined pressure against said slide, said packing means including a hollow bar of elastomeric material which is divided in its central transverse plane to define a cavity, a compressible packing material in said cavity, said adjustment member being engageable with said compressible packing material, and a sealing pad disposed between said adjustment member and said compressible packing material, said hollow bars projecting beyond each end of said slide valve, said valve comprising a flat plate, said hollow bars having a semicircular portion at each end, a similarly partly circular insert arranged between said bar semicircular end portions.
Claim 3
Dependent Claim
41 words
A slide valve according to claim 1, wherein said housing includes a U shaped groove around the periphery of said slide valve and a transversely extending annular groove joining the upper ends of said U shaped groove carrying said packing means.
Claim 4
Dependent Claim
21 words
A slide valve according to claim 2, and including a U shaped sealing ring arranged in said transversely extending annular groove.
Claim 5
Dependent Claim
26 words
A slide valve according to claim 3, wherein said slide valve comprises a flat plate having a curved bottom edge with sharp corners forming scavenging corners.
Claim 6
Dependent Claim
30 words
A slide valve according to claim 3, wherein said U shaped sealing ring extends through said packing means, said packing means comprising a hollow bar having a compressible material therein.
Claim 7
Dependent Claim
147 words
A slide valve comprising a valve housing formed of two interengageable relatively flat parts having a transverse opening extending therethrough defining a flow passage, a slide valve arranged for vertical up and downward movement in the parting plane of said two housing parts, means connected to said slide valve for moving it upwardly and downwardly, said housing having a substantially U shaped annular cross groove extending around the periphery of said slide valve at the lower end thereof and including a transversely extending portion above the transverse opening, a transversely extending compressible packing means disposed in said transversely extending portion of said groove, said packing means including a hollow elastic material bar, and a segmental compressible material in said bar, and an adjustment member mounted on said housing and engageable with the compressible material for varying the sealing force of said packing material against said slide valve.
Claim 8
Dependent Claim
147 words
A slide valve comprising a valve housing formed of two interengageable relatively flat parts having a transverse opening extending therethrough defining a flow passage, a slide valve arranged for vertical up and downward movement in the parting plane of said two housing parts, means connected to said slide valve for moving it upwardly and downwardly, said housing having a substantially U shaped annular cross groove extending around the periphery of said slide valve at the lower end thereof and including a transversely extending portion above the transverse opening, a transversely extending compressible packing means disposed in said transversely extending portion of said groove, said packing means including a hollow elastic material bar, and a segmental compressible material in said bar, and an adjustment member mounted on said housing and engageable with the compressible material for varying the sealing force of said packing material against said slide valve.
Claim 9
Dependent Claim
39 words
A slide valve according to claim 6, wherein said slide valve comprises a flat plate having relatively narrow side edges, said packing means including a semi circular cross-sectional segmental portion at each end of said slide valve flat 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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |