US3139721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Canopy actuator and ejector device
Assignee: Individual
•
Filing: 1962-03-16
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Granted: 1964-07-07
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Expires: 1982-03-16
Abstract
No abstract record available.
Inventors
- 👤 Richard P Daubenspeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:28
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A DEVICE, CHARGED WITH HIGH PRESSURE AIR OR OTHER GASEOUS MEDIUM, FOR COUNTERBALANCING AND MOVING A FIRST ELEMENT IN RELATION TO A SECOND ELEMENT, SAID DEVICE COMPRISING A HOUSING MEMBER HAVING A CYLINDER, A BASE MEMBER JOINED TO SAID HOUSING MEMBER AND ADAPTED FOR JOINING TO SAID SECOND ELEMENT, AN EJECTOR TUBE FORMING A PISTON WITHIN THE CYLINDER OF SAID HOUSING MEMBER, HOLDING MEANS FOR RELEASABLY HOLDING SAID EJECTOR TUBE WITHIN SAID HOUSING MEMBER, AN ACTUATOR TUBE FORMING A PISTON WITHIN AND COAXIAL WITH SAID EJECTOR TUBE, AN END PLUG JOINED TO SAID ACTUATOR TUBE AND ADAPTED FOR JOINING TO SAID FIRST ELEMENT, DRIVE MEANS WITHIN SAID HOUSING MEMBER FOR AXIALLY EXTENDING AND RETRACTING SAID ACTUATOR TUBE TO ACTUATE SAID FIRST ELEMENT IN RELATION TO SAID SECOND ELEMENT, MEANS FOR DISENGAGING SAID ACTUATOR TUBE FROM SAID DRIVE MEANS TO PERMIT SAID DEVICE TO EXERT A COUNTERBALANCING FORCE ON SAID FIRST ELEMENT, SAID
Claim 2
Independent Claim
152 words
A DEVICE, CHARGED WITH HIGH PRESSURE AIR OR OTHER GASEOUS MEDIUM, FOR COUNTERBALANCING AND MOVING A FIRST ELEMENT IN RELATION TO A SECOND ELEMENT, SAID DEVICE COMPRISING A HOUSING MEMBER HAVING A CYLINDER, A BASE MEMBER JOINED TO SAID HOUSING MEMBER AND ADAPTED FOR JOINING TO SAID SECOND ELEMENT, AN EJECTOR TUBE FORMING A PISTON WITHIN THE CYLINDER OF SAID HOUSING MEMBER, HOLDING MEANS FOR RELEASABLY HOLDING SAID EJECTOR TUBE WITHIN SAID HOUSING MEMBER, AN ACTUATOR TUBE FORMING A PISTON WITHIN AND COAXIAL WITH SAID EJECTOR TUBE, AN END PLUG JOINED TO SAID ACTUATOR TUBE AND ADAPTED FOR JOINING TO SAID FIRST ELEMENT, DRIVE MEANS WITHIN SAID HOUSING MEMBER FOR AXIALLY EXTENDING AND RETRACTING SAID ACTUATOR TUBE TO ACTUATE SAID FIRST ELEMENT IN RELATION TO SAID SECOND ELEMENT, MEANS FOR DISENGAGING SAID ACTUATOR TUBE FROM SAID DRIVE MEANS TO PERMIT SAID DEVICE TO EXERT A COUNTERBALANCING FORCE ON SAID FIRST ELEMENT, SAID
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |