Patent US1571726A successfully refreshed from Google Patents.
US3589703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc valves
Assignee: Metallic Valve Co Ltd
•
Filing: 1968-03-26
•
Granted: 1971-06-29
•
Expires: 1988-03-26
Abstract
Abstract Spring means for urging a valve plate against a valve seat in an annular check valve, one disclosed each comprising at least two sprint plates adapted to engage one another in a valve, each plate having a plane portion out of which are bent arcuate spring portions of each of which the axial direction of bending, the peripheral direction, and the inner and outer radii are interrelated to substantially avoid the risk of spring portions of adjacent plates becoming entangled with one another in a valve.
Inventors
- 👤 Donald Brookman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:29
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/08; F16K15/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
In an annular check valve in which a valve plate is urged against a valve seat by spring means disposed between the valve plate and a fixed abutment, said abutment normally in the form of a guardplate, the improvement comprising a set of two spring plates forming said spring means, each of said spring plates formed with a plane portion and having a plurality of spring portions that are bent out of the plane portion of said plate, said spring plates being arranged with said spring portions of each spring plate directed toward the other spring plate so that the plane portion of one said spring plate engages said valve plate and the plane portion of the other spring plate engages said abutment.
Claim 2
Dependent Claim
123 words
In an annular check valve in which a valve plate is urged against a valve seat by spring means disposed between the valve plate and a fixed abutment, said abutment normally in the form of a guardplate, the improvement comprising a set of two spring plates forming said spring means, each of said spring plates formed with a plane portion and having a plurality of spring portions that are bent out of the plane portion of said plate, said spring plates being arranged with said spring portions of each spring plate directed toward the other spring plate so that the plane portion of one said spring plate engages said valve plate and the plane portion of the other spring plate engages said abutment.
Claim 3
Dependent Claim
58 words
A valve according to claim 1 in which said spring portions are arcuate and the radii of the arcuate spring portions of one spring plate are different from the radii of the arcuate spring portions of the other spring plate of the set by an amount such that the arcuate spring portions do not radially overlap each other.
Claim 4
Dependent Claim
28 words
A valve according to claim 2 in which said spring portions are arcuate and the spring portions of the two spring plates extend in the same circumferential direction.
Claim 5
Dependent Claim
27 words
A valve according to claim 2 in which said spring portions are arcuate and the spring portions of the two spring plates extend in opposite circumferential directions.
Claim 6
Dependent Claim
49 words
A valve according to claim 1 in which said spring portions are arcuate and the radii of the arcuate spring portions of the two adjacent spring plates of a set are the same, and means being provided for restraining angular displacement of one spring plate relative to the other.
Claim 7
Dependent Claim
24 words
A valve according to claim 1 in which said arcuate spring portions of a set of two said spring plates have different spring characteristics.
Claim 8
Dependent Claim
26 words
A valve according to claim 6 in which the arcuate spring portions of one spring plate are peripherally longer than those of the other spring plate.
Claim 9
Dependent Claim
30 words
A valve according to claim 6 in which at least one of the spring plates includes some peripherally relatively longer arcuate spring portions and some peripherally shorter arcuate spring portions.
Claim 10
Dependent Claim
25 words
A valve according to claim 1 in which at least two such sets of spring plates are disposed between the valve plate and the abutment.
Claim 11
Dependent Claim
37 words
A valve according to claim 1 further comprising, a guide pin extending perpendicularly to and passing through said valve plate, one end of said guide pin engaging said abutment, whereby said valve plate is prevented from rotating.
References Cited (Backward Citations)
US3428682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |