US3243132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extensible retractable stem device
Assignee: De Havilland Aircraft of Canada Ltd
•
Filing: 1963-04-01
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Granted: 1966-03-29
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Expires: 1983-04-01
Abstract
No abstract record available.
Inventors
- 👤 Taylor Henry James
- 👤 Fry John Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:27
CPC Classifications
F; F16; F16H; F16H19/00; F16H19/02; F16H19/06; F16H19/064; B; B64; B64G; B64G99/00; H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/085; H01Q1/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
199 words
AN EXTENSIBLE RETRACTABLE STEM DEVICE COMPRISING: A STRIP INHERENTLY TENSIONED WHEN FREE TO CURL TRANSVERSELY TO FORM A TUBE; A SPOOL DEVICE UPON WHICH SAID STRIP MAY BE REELED IN FLAT UNCURLED FORM; A FRAME ROTATABLY SUPPORTING SAID SPOOL DEVICE; DRIVE MEANS ON SAID FRAME CONNECTED TO SAID SPOOL DEVICE FOR REELING AND UNREELING SAID STRIP BY ROTATION OF SAID SPOOL; A CARRIAGE MOUNTED ON SAID FRAME AND SLIDABLE FOR MOTION IN A DIRECTION SUBSTANTIALLY RADIALLY TOWARD AND AWAY FROM SAID SPOOL; A STRIP ENGAGING ROLLER ON SAID CARRIAGE ENGAGEABLE WITH THE STRIP ON SAID SPOOL TO RETAIN SAID STRIP THEREON; A SHOE MEMBER ON SAID CARRIAGE SPACED FROM SAID ROLLER TO ACCOMMODATE THEREBETWEEN STRIP FROM SAID SPOOL AND TO SUPPORT SAID STRIP AGAINST COMPRESSIVE AXIAL FORCES IN SAID STRIP; A STRIP DIRECTING ANTI-BUCKLING ROLLER ON SAID CARRIAGE SPACED FROM SAID STRIP ENGAGING ROLLER TO ACCOMMODATE SAID STRIP THEREBETWEEN AND LOCATED RELATIVE TO SAID STRIP ENGAGING ROLLER TO DIRECT SAID STRIP SUBSTANTIALLY RADIALLY FROM SAID SPOOL; AND MEANS URGING SAID CARRIAGE TOWARD SAID SPOOL FOR PRESSURE ENGAGEMENT OF SAID STRIP ENGAGING ROLLER WITH SAID REELED STRIP WHILE SAID SPOOL IS STATIONARY AND DURING REELING AND UNREELING OF SAID STRIP.
Claim 2
Dependent Claim
199 words
AN EXTENSIBLE RETRACTABLE STEM DEVICE COMPRISING: A STRIP INHERENTLY TENSIONED WHEN FREE TO CURL TRANSVERSELY TO FORM A TUBE; A SPOOL DEVICE UPON WHICH SAID STRIP MAY BE REELED IN FLAT UNCURLED FORM; A FRAME ROTATABLY SUPPORTING SAID SPOOL DEVICE; DRIVE MEANS ON SAID FRAME CONNECTED TO SAID SPOOL DEVICE FOR REELING AND UNREELING SAID STRIP BY ROTATION OF SAID SPOOL; A CARRIAGE MOUNTED ON SAID FRAME AND SLIDABLE FOR MOTION IN A DIRECTION SUBSTANTIALLY RADIALLY TOWARD AND AWAY FROM SAID SPOOL; A STRIP ENGAGING ROLLER ON SAID CARRIAGE ENGAGEABLE WITH THE STRIP ON SAID SPOOL TO RETAIN SAID STRIP THEREON; A SHOE MEMBER ON SAID CARRIAGE SPACED FROM SAID ROLLER TO ACCOMMODATE THEREBETWEEN STRIP FROM SAID SPOOL AND TO SUPPORT SAID STRIP AGAINST COMPRESSIVE AXIAL FORCES IN SAID STRIP; A STRIP DIRECTING ANTI-BUCKLING ROLLER ON SAID CARRIAGE SPACED FROM SAID STRIP ENGAGING ROLLER TO ACCOMMODATE SAID STRIP THEREBETWEEN AND LOCATED RELATIVE TO SAID STRIP ENGAGING ROLLER TO DIRECT SAID STRIP SUBSTANTIALLY RADIALLY FROM SAID SPOOL; AND MEANS URGING SAID CARRIAGE TOWARD SAID SPOOL FOR PRESSURE ENGAGEMENT OF SAID STRIP ENGAGING ROLLER WITH SAID REELED STRIP WHILE SAID SPOOL IS STATIONARY AND DURING REELING AND UNREELING OF SAID STRIP.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |