Patent US3304842A successfully refreshed from Google Patents.
US3304842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-hammer poppet valve control
Assignee: Individual
•
Filing: 1964-04-20
•
Granted: 1967-02-21
•
Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Homer J Shafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:04
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87193; Y10T137/87209; Y10T137/87217; Y10T137/87225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A FLUID CONTROL FOR A DOUBLE-ACTING FLUID MOTOR OPERATOR FOR A VALVE COMPRISING, FIRST AND SECOND DISPENSING CHAMBERS CONNECTED TO OPPOSITE SIDES OF SAID MOTOR MEANS, A FLUID POWER SOURCE, AN INDIVIDUAL INPUT VALVING MEANS CONNECTING EACH DISPENSING CHAMBER WITH SAID POWER SOURCE, SPRING MEANS NORMALLY BIASING EACH SAID INPUT VALVING MEANS TO CLOSE THE DISPENSING CHAMBER TO SAID POWER SOURCE, A DISCHARGE MEANS, AN INDIVIDUAL EXHAUST VALVING MEANS CONNECTING EACH DISPENSING CHAMBER WITH SAID DISCHARGE MEANS, A PISTON MEANS CONNECTED TO EACH SAID INPUT VALVING MEANS, EACH SAID PISTON MEANS SLIDABLY DISPOSED IN A CHAMBER TO FORM FIRST AND SECOND OPPOSED WORK CHAMBERS, ONE ON EACH SIDE OF SAID PISTON, MEANS CONNECTING SAID FIRST WORK CHAMBER WITH SAID POWER SUPPLY TO OPEN SAID INPUT VALVING MEANS, A CLOSING CHAMBER FOR EACH EXHAUST VALVING MEANS IN SELECTIVE COMMUNICATION WITH SAID POWER SOURCE, RESTRICTIVE FLOW MEANS
Claim 2
Dependent Claim
145 words
A FLUID CONTROL FOR A DOUBLE-ACTING FLUID MOTOR OPERATOR FOR A VALVE COMPRISING, FIRST AND SECOND DISPENSING CHAMBERS CONNECTED TO OPPOSITE SIDES OF SAID MOTOR MEANS, A FLUID POWER SOURCE, AN INDIVIDUAL INPUT VALVING MEANS CONNECTING EACH DISPENSING CHAMBER WITH SAID POWER SOURCE, SPRING MEANS NORMALLY BIASING EACH SAID INPUT VALVING MEANS TO CLOSE THE DISPENSING CHAMBER TO SAID POWER SOURCE, A DISCHARGE MEANS, AN INDIVIDUAL EXHAUST VALVING MEANS CONNECTING EACH DISPENSING CHAMBER WITH SAID DISCHARGE MEANS, A PISTON MEANS CONNECTED TO EACH SAID INPUT VALVING MEANS, EACH SAID PISTON MEANS SLIDABLY DISPOSED IN A CHAMBER TO FORM FIRST AND SECOND OPPOSED WORK CHAMBERS, ONE ON EACH SIDE OF SAID PISTON, MEANS CONNECTING SAID FIRST WORK CHAMBER WITH SAID POWER SUPPLY TO OPEN SAID INPUT VALVING MEANS, A CLOSING CHAMBER FOR EACH EXHAUST VALVING MEANS IN SELECTIVE COMMUNICATION WITH SAID POWER SOURCE, RESTRICTIVE FLOW 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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |