US3633614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: Gustav F Gerdts KG
•
Filing: 1969-10-21
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Granted: 1972-01-11
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Expires: 1989-10-21
Abstract
Abstract A check valve has a plate guided sidewise by ribs and serving as a closure. The plate along with a closure spring and a spring support is located in a flat casing with a valve seat. The check valve is particularly characterized in that the spring support along with the guiding ribs for the valve plate consists of a rigid wire box fixed in the casing containing all the parts of the check valve.
Inventors
- 👤 Heinz Paul Scholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:55
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7937
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
119 words
A check valve, comprising a casing having a valve seat, a valve plate located within said casing, a spring located within said casing and engaging said valve plate, and a rigid wire box located within said casing and having two separate intersecting looped pieces, said looped pieces being joined at their intersection and having upper top ribs constituting holders for said spring and U-shaped arms extending perpendicularly to said top ribs toward said valve seat and constituting guiding ribs for said valve plate, said casing having an annular groove, the bent portions of said arms being located in said groove, said casing also having a recess located above said groove, said arms having free ends extending into said recess.
Claim 2
Dependent Claim
119 words
A check valve, comprising a casing having a valve seat, a valve plate located within said casing, a spring located within said casing and engaging said valve plate, and a rigid wire box located within said casing and having two separate intersecting looped pieces, said looped pieces being joined at their intersection and having upper top ribs constituting holders for said spring and U-shaped arms extending perpendicularly to said top ribs toward said valve seat and constituting guiding ribs for said valve plate, said casing having an annular groove, the bent portions of said arms being located in said groove, said casing also having a recess located above said groove, said arms having free ends extending into said recess.
Claim 3
Dependent Claim
31 words
A check valve in accordance with claim 1, wherein said free ends of the arms have curved portions, corresponding to the curvature of the casing and terminating in inwardly projecting endings.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |