US5372161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve plates for single-control valve
Assignee: Grohe Water Technology AG and Co KG
•
Filing: 1992-02-12
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Granted: 1994-12-13
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Expires: 2012-02-12
Abstract
Abstract A single-control valve has a normally stationary valve plate formed with hot- and cold-water inlet ports and an outlet port opening at a flat face of the valve plate and a movable control plate having a flat face lying on the valve-plate face and formed with a cavity opening at the control-plate face and juxtaposable over the ports. at least one of the plates and its surface are formed of a hard ceramic, and at least the surface of the other of the plates is formed of a low-friction synthetic resin. The low-friction synthetic resin is polyethylene or polypropylene.
Inventors
- 👤 Veit Bechte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:50
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/04; F16K3/06; F16K3/08; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/074; F16K11/078; F16K11/0782; F16K11/0787; F16K25/00; F16K25/005; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86549; Y10T137/86815
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
In a single-control valve having a normally stationary valve plate formed with at least one inlet port opening at a flat face of the valve plate, a movable control plate having a flat face lying on the valve-plate face and formed with a cavity opening at the control-plate face and juxtaposable over the port, and means for shifting the control plate on the valve plate with the two faces sliding on each other in flat surface contact, the improvement wherein at least one of the plates and its surface are formed of a hard ceramic, and at least the surface of the other of the plates is formed of polyethylene or polypropylene.
Claim 2
Dependent Claim
112 words
In a single-control valve having a normally stationary valve plate formed with at least one inlet port opening at a flat face of the valve plate, a movable control plate having a flat face lying on the valve-plate face and formed with a cavity opening at the control-plate face and juxtaposable over the port, and means for shifting the control plate on the valve plate with the two faces sliding on each other in flat surface contact, the improvement wherein at least one of the plates and its surface are formed of a hard ceramic, and at least the surface of the other of the plates is formed of polyethylene or polypropylene.
Claim 3
Dependent Claim
19 words
The improved valve defined in claim 1 wherein the other plate is entirely formed of the polyethylene or polypropylene.
Claim 4
Dependent Claim
30 words
The improved valve defined in claim 1 wherein the other plate comprises a rigid support body and a layer of the polyethylene or polypropylene forming the surface on the body.
Claim 5
Dependent Claim
20 words
The improved valve defined in claim 3 wherein the body is provided on its face with the polyethylene or polypropylene.
Claim 6
Dependent Claim
22 words
The improved valve defined in claim 4 wherein the layer of polyethylene or polypropylene is formed as a cap on the body.
Claim 7
Dependent Claim
17 words
The improved valve defined in claim 5, further comprising an adhesive securing the cap to the body.
Claim 8
Dependent Claim
16 words
The improved valve defined in claim 4 wherein the cap is fixedly anchored to the body.
Claim 9
Dependent Claim
19 words
The improved valve defined in claim 1, further comprising means for elastically urging the two faces against each other.
Claim 10
Dependent Claim
13 words
The improved valve defined in claim 1 wherein the faces are substantially planar.
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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) | 1997-12-12 | 1998-06-13 | 1998-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-12 | 2002-06-13 | 2002-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-12 | 2006-06-13 | 2006-12-13 | $7700.00 | Window Closed / Lapsed |