US3621879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed control and check valve system
Assignee: Calgon Corp
•
Filing: 1970-01-09
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Granted: 1971-11-23
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Expires: 1990-01-09
Abstract
Abstract A feed control device is disclosed for controlling the flow of caustic and other aggressive liquids. It incorporates a double safety device including a check valve and a U-cup to stop reverse flow.
Inventors
- 👤 James E Ticcioni
- 👤 Raymond Herman Enters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:20
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/18; F16K15/184; F16K15/1843; F16K15/182; F16K15/1823; F16K17/00; F16K17/02; F16K17/04; F16K17/0406; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7846; Y10T137/8593; Y10T137/87917; Y10T137/88054
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
A combination flow control and check valve device, useful for handling caustic, acid, and other aggressive liquids, comprising a housing having an inlet port and an outlet port, and defining a passage through said housing, an enlarged chamber in said passage at the point nearest the outlet port, a valve shaft in said passage, said valve shaft having mounted thereon two pairs of divergently mounted U-cups, one pair on each side of said inlet port, said U-cups circumferentially contacting the surface of said passage, a check valve assembly permitting flow from said outlet port, and a solenoid adapted to move the valve shaft.
Claim 2
Dependent Claim
103 words
A combination flow control and check valve device, useful for handling caustic, acid, and other aggressive liquids, comprising a housing having an inlet port and an outlet port, and defining a passage through said housing, an enlarged chamber in said passage at the point nearest the outlet port, a valve shaft in said passage, said valve shaft having mounted thereon two pairs of divergently mounted U-cups, one pair on each side of said inlet port, said U-cups circumferentially contacting the surface of said passage, a check valve assembly permitting flow from said outlet port, and a solenoid adapted to move the valve shaft.
Claim 3
Dependent Claim
27 words
Device of claim 1 in which a protruding stop is mounted on said valve shaft to preclude either pair of U-cups from moving past the inlet port.
Claim 4
Dependent Claim
20 words
Device of claim 1 in which one pair of U-cups enters said enlarged chamber when the solenoid is not energized.
Claim 5
Dependent Claim
14 words
Device of claim 1 in which the check valve assembly is a ball valve.
References Cited (Backward Citations)
US2969088A
Cited
US3009482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |