US3565109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel emission control system
Assignee: F AND E Manufacturing CO
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Filing: 1969-09-11
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Granted: 1971-02-23
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Expires: 1989-09-11
Abstract
Abstract A fuel emission control system comprising a gas tank and interconnecting lines with an inflatable tank and a pressure responsive valve which is operable to vent the excess pressure in the fuel tank and the inflatable tank to the atmosphere through emission absorptive material.
Inventors
- 👤 Robert K Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:16
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/08; F02M25/0836; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87153; Y10T137/87161
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
For use in a fuel emission control system or the like; a valve comprising a valve housing; a pair of fluid-responsive diaphragms in said housing dividing said housing into an intermediate and two outer chambers; spring means yieldingly urging said diaphragms outwardly away from one another; an intermediate wall between said diaphragms; said wall having passages providing communication between the opposite sides thereof; said spring means comprising separate spring elements interposed between said wall and the respective diaphragms; each of said outer chambers having a pair of openings therein; each said diaphragm having valve means thereon closing one of said openings in each chamber under the action of said spring means; and said housing having another opening providing communication from the intermediate chamber to the exterior of the housing.
Claim 2
Dependent Claim
129 words
For use in a fuel emission control system or the like; a valve comprising a valve housing; a pair of fluid-responsive diaphragms in said housing dividing said housing into an intermediate and two outer chambers; spring means yieldingly urging said diaphragms outwardly away from one another; an intermediate wall between said diaphragms; said wall having passages providing communication between the opposite sides thereof; said spring means comprising separate spring elements interposed between said wall and the respective diaphragms; each of said outer chambers having a pair of openings therein; each said diaphragm having valve means thereon closing one of said openings in each chamber under the action of said spring means; and said housing having another opening providing communication from the intermediate chamber to the exterior of the housing.
Claim 3
Dependent Claim
43 words
The combination set forth in claim 1 wherein said housing comprises a pair of housing members and an intermediate plastic ring having said last-mentioned opening therein, said housing members, intermediate wall, ring and diaphragm being clamped together to form a unitary valve structure.
Claim 4
Dependent Claim
56 words
The combination set forth in claim 1 wherein each said diaphragm includes spaced discs on opposite sides thereof; said valve means each comprising a resilient member mounted on the outermost disc of each said diaphragm; and said resilient member engaging the periphery of an opening of its respective chamber under the action of said spring means.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |