Patent US3349516A successfully refreshed from Google Patents.
US3349516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid actuated door operating mechanism
Assignee: Individual
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Filing: 1965-07-28
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Granted: 1967-10-31
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Expires: 1985-07-28
Abstract
No abstract record available.
Inventors
- 👤 Robert H Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:13
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/50; E05F15/57; E05F15/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
IN COMBINATION WITH A GARAGE DOOR AND COUPLED THERETO BY A CABLE, A SINGLE-ACTING FLUID CYLINDER HAVING A MOVABLE ROD EXTENDING THEREFROM CONNECTED WITH THE CABLE; A FIRST VALVE OPERATED BY A SOLENOID AND CONNECTED BETWEEN SAID CYLINDER AND A SOURCE OF TAP WATER; A SECOND VALVE OPERATED BY A SOLENOID AND CONNECTED BETWEEN SAID CYLINDER AND A DRAIN OUTLET; AND SWITCHING MEANS FOR SELECTIVELY ENERGIZING SAID VALVE SOLENOIDS IN ANY POSITION OF SAID GARAGE DOOR AND IN SUCH MANNER AS TO EFFECT OPENING OF EITHER VALVE AND CLOSING OF THE OTHER VALVE, AND SIMULTANEOUSLY CLOSING OF BOTH VALVES; WHEREBY SAID GARAGE DOOR IS LIFTED WHEN SAID FIRST VALVE IS OPENED TO PERMIT WATER FROM SAID SOURCE TO ENTER SAID CYLINDER TO DRAW SAID ROD EXTENDING THEREFROM INTO SAID CYLINDER AND PULL UPON SAID CABLE, AND WHEREBY SAID GARAGE DOOR IS LOWERED WHEN SAID SECOND VALVE IS OPENED TO PERMIT SAID WATER FROM SAID CYLINDER TO DRAIN INTO SAID DRAIN OUTLET, EXTENDING SAID ROD TO RELEASE SAID CABLE, AND WHEREBY FURTHER SAID GARAGE DOOR MAY BE ARRESTED AND POSITIVELY RETAINED IN ANY POSITION.
Claim 2
Dependent Claim
183 words
IN COMBINATION WITH A GARAGE DOOR AND COUPLED THERETO BY A CABLE, A SINGLE-ACTING FLUID CYLINDER HAVING A MOVABLE ROD EXTENDING THEREFROM CONNECTED WITH THE CABLE; A FIRST VALVE OPERATED BY A SOLENOID AND CONNECTED BETWEEN SAID CYLINDER AND A SOURCE OF TAP WATER; A SECOND VALVE OPERATED BY A SOLENOID AND CONNECTED BETWEEN SAID CYLINDER AND A DRAIN OUTLET; AND SWITCHING MEANS FOR SELECTIVELY ENERGIZING SAID VALVE SOLENOIDS IN ANY POSITION OF SAID GARAGE DOOR AND IN SUCH MANNER AS TO EFFECT OPENING OF EITHER VALVE AND CLOSING OF THE OTHER VALVE, AND SIMULTANEOUSLY CLOSING OF BOTH VALVES; WHEREBY SAID GARAGE DOOR IS LIFTED WHEN SAID FIRST VALVE IS OPENED TO PERMIT WATER FROM SAID SOURCE TO ENTER SAID CYLINDER TO DRAW SAID ROD EXTENDING THEREFROM INTO SAID CYLINDER AND PULL UPON SAID CABLE, AND WHEREBY SAID GARAGE DOOR IS LOWERED WHEN SAID SECOND VALVE IS OPENED TO PERMIT SAID WATER FROM SAID CYLINDER TO DRAIN INTO SAID DRAIN OUTLET, EXTENDING SAID ROD TO RELEASE SAID CABLE, AND WHEREBY FURTHER SAID GARAGE DOOR MAY BE ARRESTED AND POSITIVELY RETAINED IN ANY POSITION.
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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |