Patent US4472118A successfully refreshed from Google Patents.
US4472118A
Expired / Lapsed
US
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Multi-way valves for pumps for conveying heavy flowable materials
Assignee: FRIEDRICH WILH SCHWING A Co OF WEST GERMANY GmbH
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Filing: 1982-04-01
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Granted: 1984-09-18
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Expires: 2002-04-01
Abstract
Abstract The valve has a shutter mechanism which is movable within a housing and is provided at one end with at least one inlet which is movable across one or more housing openings and at the opposite end with an outlet surrounded by a sealed contact joint which is movable across a delivery pipe opening in the housing. This sealed contact joint surrounds the delivery pipe opening in the housing and contacts either the inside wall of the housing or a face plate arranged on the inside wall of the housing in all intermediate and final positions of the shutter mechanism. With the aim of reducing wear and producing a permanent seal, the sealed contact joint is in the form of a compressible sealing ring with a slotted or kidney-shaped cross-section which serves to wipe the flat and smooth face plate or inside wall of the housing. Moreover the compressible sealing ring is loaded with the internal pressure of the shutter mechanism and is supported outwardly by a flange surrounding the outlet and extending in the conveying direction.
Inventors
- 👤 Friedrich Schwing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:51
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/02; F04B15/023; F04B7/00; F04B7/0084; F04B7/0088; F04B7/0092; F16; F16K; F16K11/00; F16K27/00; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
163 words
A multi-way valve for a pump for conveying heavy flowable materials having a shutter mechanism movable within a housing, the shutter mechanism having at one end at least one inlet which is movable across one or more housing openings and at the opposite end an outlet surrounded by a sealed contact joint which is movable across a delivery pipe opening in the housing, the contact joint surrounding the delivery pipe opening and contacting either the inside wall of the housing or a face plate arranged on the inside wall of the housing in all intermediate and final positions of the shutter mechanism, wherein the contact joint is in the form of a compressible sealing ring with a slotted or kidney-shaped cross-section which serves to wipe the flat and smooth face plate or inside wall of the housing, and is loaded with the internal pressure of the shutter mechanism and supported outwardly by a flange surrounding the outlet and extending in the conveying direction.
Claim 2
Dependent Claim
163 words
A multi-way valve for a pump for conveying heavy flowable materials having a shutter mechanism movable within a housing, the shutter mechanism having at one end at least one inlet which is movable across one or more housing openings and at the opposite end an outlet surrounded by a sealed contact joint which is movable across a delivery pipe opening in the housing, the contact joint surrounding the delivery pipe opening and contacting either the inside wall of the housing or a face plate arranged on the inside wall of the housing in all intermediate and final positions of the shutter mechanism, wherein the contact joint is in the form of a compressible sealing ring with a slotted or kidney-shaped cross-section which serves to wipe the flat and smooth face plate or inside wall of the housing, and is loaded with the internal pressure of the shutter mechanism and supported outwardly by a flange surrounding the outlet and extending in the conveying direction.
Claim 3
Dependent Claim
36 words
A multi-way valve according to claim 1, wherein the compressible sealing ring has an outer edge which performs a cleaning function during wiping and an inner edge or lip which performs a cleaning and sealing function.
Claim 4
Dependent Claim
19 words
A multi-way valve according to claim 1, wherein an outer thrust ring is provided on the compressible sealing ring.
Claim 5
Dependent Claim
22 words
A multi-way valve according to claim 1, wherein a thrust ring is supported on a radial surface of the compressible sealing ring.
Claim 6
Dependent Claim
37 words
A multi-way valve according to claim 1, wherein a recess is formed in the flange with an inner radial surface and an outer axial surface orthogonal to the inner surface, and also an inner axial annular flange.
Claim 7
Dependent Claim
40 words
A multi-way valve according to claim 1, wherein a seating ring is supported within the recess on the inner radial surface and the outer axial surface, and the seating ring forms a structural unit with the inner axial annular flange.
Claim 8
Dependent Claim
17 words
A multi-way valve according to claim 1, wherein the sealing ring is axially prestressed by an O-ring.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |