Patent US3770225A successfully refreshed from Google Patents.
US3770225A
Expired / Lapsed
US
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Safety seat-belt and shoulder-belt retractors including a program metering electrical switch
Assignee: Safety Systems Inc
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Filing: 1971-10-07
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Granted: 1973-11-06
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Expires: 1991-10-07
Abstract
Abstract Safety seat-belt retractors are made with roller pawl means having the free-run direction in the belt retracting direction of the retractor and means biasing the rollers of the pawl means against movement into the no-run position, e.g., where the rollers are moved outwardly by a cam for the no-run position, a coiled spring ring biases the rollers inwardly against their outward movement into the no-run or locking position. With such a retractor, the seat-belt may be slowly moved either in or out for any distance of its length, e.g., when the occupant of the vehicle wishes to adjust position upon the vehicle seat, but the belt is instantly locked against extension (unrolling) if a quick pull is exerted upon it, e.g., where sudden deceleration of the vehicle would tend to throw the occupant of the seat forward. Such retractors provide emergency-locking and automatic unlocking and relocking. They may include electric switch elements that meter extraction length of the belt and signal proper belt fastening.
Inventors
- 👤 O Boblitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:08
CPC Classifications
B; B60; B60R; B60R22/00; B60R22/34; B60R22/36; B60R22/38; B60R22/48; B60R2022/4808; B60R2022/4825
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
263 words
In a safety seat-belt retractor device having a frame member by which the retractor may be mounted in a vehicle, a shaft which is rotated to cause a section of belt to wind up for retraction and spring means urging the shaft to turn in a belt retracting direction, an emergency-locking automatic-unlocking and relocking unit which comprises roller pawl means comprising a cam member fixed to said shaft, a circular roller cage member that encircles said cam member, the cage member having a plurality of slots therein, a roller carried in each of said slots to engage a face of said cam member, a resilient ring which encircles said cage member adjacent one end thereof and contacts said rollers through said slots urging the rollers toward said cam member, a circular housing fixed to said frame member that encircles a portion of said cage member and said rollers not encircled by said resilient ring, the inside diameter of said circular housing being larger than the outside diameter of said cage member but smaller than the radial extremity to which said rollers may be moved by said cam member through said slots and friction means between said frame member and said cage member for permitting said cage member to rotate freely upon slow rotation of said cam member by said shaft but resist rotation of the cage member upon rapid rotation of said cam member, whereby said rollers are moved by said cam member through said slots into engagement with said circular housing upon relative rotation of said cam member and said cage member.
Claim 2
Dependent Claim
263 words
In a safety seat-belt retractor device having a frame member by which the retractor may be mounted in a vehicle, a shaft which is rotated to cause a section of belt to wind up for retraction and spring means urging the shaft to turn in a belt retracting direction, an emergency-locking automatic-unlocking and relocking unit which comprises roller pawl means comprising a cam member fixed to said shaft, a circular roller cage member that encircles said cam member, the cage member having a plurality of slots therein, a roller carried in each of said slots to engage a face of said cam member, a resilient ring which encircles said cage member adjacent one end thereof and contacts said rollers through said slots urging the rollers toward said cam member, a circular housing fixed to said frame member that encircles a portion of said cage member and said rollers not encircled by said resilient ring, the inside diameter of said circular housing being larger than the outside diameter of said cage member but smaller than the radial extremity to which said rollers may be moved by said cam member through said slots and friction means between said frame member and said cage member for permitting said cage member to rotate freely upon slow rotation of said cam member by said shaft but resist rotation of the cage member upon rapid rotation of said cam member, whereby said rollers are moved by said cam member through said slots into engagement with said circular housing upon relative rotation of said cam member and said cage member.
Claim 3
Dependent Claim
32 words
The seat-belt retractor of claim 1 wherein said resilient ring is a coiled spring ring and said friction means comprises a washer having a face engaging a portion of the cage member.
Claim 4
Dependent Claim
33 words
A seat-belt retractor as claimed in claim 1 having a programmed metering electrical switch operatively engaged with said shaft to perform a switching operation upon a predetermined extension of belt from the retractor.
References Cited (Backward Citations)
US3506305A
Cited
US3442467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |