US3698657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inertia operated locking retractor
Assignee: Individual
•
Filing: 1970-09-01
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Granted: 1972-10-17
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Expires: 1990-09-01
Abstract
Abstract An inertia operated locking retractor in which angular acceleration of the spool upon which a safety belt is mounted causes a pawl to abut against a lock means in preventing further rotation of the spool and further unwinding of the safety belt therefrom.
Inventors
- 👤 Horst-Guenter Kirchhoff
- 👤 Peter Pfabe
- 👤 Gerhard Sedlmayr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:46
CPC Classifications
B; B60; B60R; B60R22/00; B60R22/34; B60R22/36; B60R22/38
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
278 words
In a self-locking retractor mechanism, the combination of a supporting frame, a spool rotatably mounted on said frame, said spool including a projecting segment, a flexible belt for winding and unwinding with respect to said spool, a spring biased to normally wind the belt upon said spool, said frame having lock means, a pawl having a body portion including an extended portion positioned for cooperation with said lock means, said body portion of said pawl including a shaped slot having stop limit portions, and a pivot Pin attached to one end of said spool, said pawl being pivotally mounted on said pivot pin with said segment of said spool movably interfitting within said shaped slot of said pawl for interengagement therewith, said pawl being dynamically balanced about said pivot pin for normal rotation as a system with said spool about the axis of rotation of said spool, said pivot pin being disposed eccentric of the axis of rotation of said spool so that angular acceleration of said spool on unwinding of said belt therefrom imposes a tangential force on said pawl and displaces said pawl from normal rotation with said spool, interengagement of said segment with said shaped slot comprising guide means for regulating displacement of said pawl with respect to said spool and guiding said pawl to a position whereby said extended portion of said pawl engages said lock means, engagement of said extended portion of said pawl with said lock means stopping rotation of said pawl, interengagement of said segment with said stop limit portion of said slot comprising stop means to conjunctively stop rotation of said spool and prevent further unwinding of said belt therefrom.
Claim 2
Dependent Claim
278 words
In a self-locking retractor mechanism, the combination of a supporting frame, a spool rotatably mounted on said frame, said spool including a projecting segment, a flexible belt for winding and unwinding with respect to said spool, a spring biased to normally wind the belt upon said spool, said frame having lock means, a pawl having a body portion including an extended portion positioned for cooperation with said lock means, said body portion of said pawl including a shaped slot having stop limit portions, and a pivot Pin attached to one end of said spool, said pawl being pivotally mounted on said pivot pin with said segment of said spool movably interfitting within said shaped slot of said pawl for interengagement therewith, said pawl being dynamically balanced about said pivot pin for normal rotation as a system with said spool about the axis of rotation of said spool, said pivot pin being disposed eccentric of the axis of rotation of said spool so that angular acceleration of said spool on unwinding of said belt therefrom imposes a tangential force on said pawl and displaces said pawl from normal rotation with said spool, interengagement of said segment with said shaped slot comprising guide means for regulating displacement of said pawl with respect to said spool and guiding said pawl to a position whereby said extended portion of said pawl engages said lock means, engagement of said extended portion of said pawl with said lock means stopping rotation of said pawl, interengagement of said segment with said stop limit portion of said slot comprising stop means to conjunctively stop rotation of said spool and prevent further unwinding of said belt therefrom.
Claim 3
Dependent Claim
42 words
A self locking retractor mechanism as specified in claim 1 wherein said segment comprises a segment of a cross section of said spool and spring means is provided to bias said pawl for normal rotation thereof as a system with said spool.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |