US3216528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring motor drive
Assignee: Individual
•
Filing: 1963-12-23
•
Granted: 1965-11-09
•
Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Lohr Riley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:49
CPC Classifications
F; F02; F02N; F02N5/00; F02N5/02; F03; F03G; F03G1/00; F03G1/02; F03G1/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
199 words
IN A SPRING MOTOR DRIVE SYSTEM HAVING A ROTATABLY MOUNTED SPOOL ADAPTED TO HOUSE A RETRACTABLE PRESTRESSED SPRING, A ROTATABLE POWER DRUM MOUNTED ADJACENT SAID SPOOL, SAID SPRING ATTACHED AT ONE END TO SAID SPOOL AND INCLUDING MEANS ON THE OTHER END FOR ANCHORING TO SAID DRUM WHEN SAID SPRING IS WOUND THEREUPON, SAID SPRING REVERSELY WOUND UPON ITSELF IN PASSING FROM SAID SPOOL TO SAID DRUM TO PROVIDE AN S-SHAPED CURVE WHEREBY DRIVE ENERGY WILL BE STORED UPON SAID DRUM WHEN SAID SPRING IS WOUND THEREUPON, SAID ANCHORING MEANS COMPRISING A PRE-FORMED LOOP IN SAID REVERSELY WOUND SPRING INCLUDING A FULL CIRCLE AND WHICH WHEN FREE-STANDING AWAY FROM SAID DRUM HAS A NORMAL INNER DIAMETER LESS THAN THE OUTER DIAMETER OF SAID DRUM SO THAT WHEN DISPOSED ABOUT SAID DRUM ENGAGES THE DRUM OF ITS OWN ACCORD AS SAID SPRING IS WOUND UPON SAID DRUM, AND FREE-WHEELING MEANS INCLUDING A ROTATABLE SHAFT DRIVEN BY SAID DRUM AND PROVIDING CONTINUED ROTARY MOVEMENT OF SAID SHAFT AFTER RETRACTION OF SAID SPRING FROM SAID DRUM TO SAID SPOOL DUE TO ROTATION OF SAID DRUM WHICH CAUSES SAID PRE-FORMED LOOP TO INCREASE ITS DIAMETER AND THEREBY RELEASE ITS ENGAGEMENT WITH SAID DRUM.
Claim 2
Dependent Claim
199 words
IN A SPRING MOTOR DRIVE SYSTEM HAVING A ROTATABLY MOUNTED SPOOL ADAPTED TO HOUSE A RETRACTABLE PRESTRESSED SPRING, A ROTATABLE POWER DRUM MOUNTED ADJACENT SAID SPOOL, SAID SPRING ATTACHED AT ONE END TO SAID SPOOL AND INCLUDING MEANS ON THE OTHER END FOR ANCHORING TO SAID DRUM WHEN SAID SPRING IS WOUND THEREUPON, SAID SPRING REVERSELY WOUND UPON ITSELF IN PASSING FROM SAID SPOOL TO SAID DRUM TO PROVIDE AN S-SHAPED CURVE WHEREBY DRIVE ENERGY WILL BE STORED UPON SAID DRUM WHEN SAID SPRING IS WOUND THEREUPON, SAID ANCHORING MEANS COMPRISING A PRE-FORMED LOOP IN SAID REVERSELY WOUND SPRING INCLUDING A FULL CIRCLE AND WHICH WHEN FREE-STANDING AWAY FROM SAID DRUM HAS A NORMAL INNER DIAMETER LESS THAN THE OUTER DIAMETER OF SAID DRUM SO THAT WHEN DISPOSED ABOUT SAID DRUM ENGAGES THE DRUM OF ITS OWN ACCORD AS SAID SPRING IS WOUND UPON SAID DRUM, AND FREE-WHEELING MEANS INCLUDING A ROTATABLE SHAFT DRIVEN BY SAID DRUM AND PROVIDING CONTINUED ROTARY MOVEMENT OF SAID SHAFT AFTER RETRACTION OF SAID SPRING FROM SAID DRUM TO SAID SPOOL DUE TO ROTATION OF SAID DRUM WHICH CAUSES SAID PRE-FORMED LOOP TO INCREASE ITS DIAMETER AND THEREBY RELEASE ITS ENGAGEMENT WITH SAID DRUM.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |