US3822046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractor for safety belts especially for motor vehicles
Assignee: Klippan GmbH Hamburg
•
Filing: 1972-08-30
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Granted: 1974-07-02
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Expires: 1992-08-30
Abstract
Abstract A belt retractor for safety belts including, in addition to a conventional latching mechanism, sensing means for sensing small values of belt withdrawal acceleration and operating means for actuating the latching mechanism. A guide disc is movably connected to a plurality of locking members serving merely as release means for actuating sensor arms and detents which block the belt roller. For more positive blocking of the roller, the latching mechanism may include a pair of ratchet wheels operationally coupled to the respective actuating means.
Inventors
- 👤 A Baelder
- 👤 U Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:13
CPC Classifications
B; B60; B60R; B60R22/00; B60R22/34; B60R22/36; B60R22/38
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
222 words
A retractor device for safety belts, especially for motor vehicles, comprising: a casing; a retractor axle rotatably mounted in said casing; a shaft mounted concentrically to said axle and adapted to wind and unwind said safety belt on said shaft; a biasing means connected to said axle, biasing said axle to wind said safety belt on said shaft; a ratchet wheel mounted on said shaft; a latch member rotatably mounted in said casing, said latch member including a locking arm adapted to engage said ratchet wheel when blocking said retractor device; a biasing means connected to said latch member, biasing said latch member away from said ratchet wheel; a guide disc rotatably mounted on said retractor axle, said guide disc being a release means for actuating said latch member; a plurality of locking members rotatably connected to said guide disc, said locking members having tips, the spacing of said tips of said locking members from said retractor axle increasing by inertia when the unwinding of said safety belt is accelerated, said latch member including a sensor arm disposed in the plane of rotation of said locking members, said sensor arm being connected to said latching member and being adapted to sense small amounts of acceleration in the unwinding of said belt and to actuate said locking arm to engage said ratchet wheel.
Claim 2
Dependent Claim
222 words
A retractor device for safety belts, especially for motor vehicles, comprising: a casing; a retractor axle rotatably mounted in said casing; a shaft mounted concentrically to said axle and adapted to wind and unwind said safety belt on said shaft; a biasing means connected to said axle, biasing said axle to wind said safety belt on said shaft; a ratchet wheel mounted on said shaft; a latch member rotatably mounted in said casing, said latch member including a locking arm adapted to engage said ratchet wheel when blocking said retractor device; a biasing means connected to said latch member, biasing said latch member away from said ratchet wheel; a guide disc rotatably mounted on said retractor axle, said guide disc being a release means for actuating said latch member; a plurality of locking members rotatably connected to said guide disc, said locking members having tips, the spacing of said tips of said locking members from said retractor axle increasing by inertia when the unwinding of said safety belt is accelerated, said latch member including a sensor arm disposed in the plane of rotation of said locking members, said sensor arm being connected to said latching member and being adapted to sense small amounts of acceleration in the unwinding of said belt and to actuate said locking arm to engage said ratchet wheel.
Claim 3
Dependent Claim
27 words
A retractor device for safety belts according to claim 1 wherein said plurality of locking members are equally spaced about a peripheral portion of said guide disc.
Claim 4
Dependent Claim
27 words
A retractor device for safety belts according to claim 1 wherein said plurality of locking members comprises four locking members which are connected to said guide disc.
Claim 5
Dependent Claim
34 words
A retractor device for safety belts according to claim 1 wherein said locking members comprise: segments having outer peripheries lying in an approximate circle, said segments having tips which move outward radially during rotation.
Claim 6
Dependent Claim
25 words
A retractor device for safety belts according to claim 4 and further comprises a coil spring coupling said guide disc to one of said segments.
Claim 7
Dependent Claim
34 words
A retractor device for safety belts according to claim 1 wherein said guide disc has bores and said locking members comprise entrainment lugs, said entrainment lugs extending through said bores in said guide disc.
Claim 8
Dependent Claim
31 words
A retractor device for safety belts according to claim 6 and further comprising: an entrainment disc rigidly connected to said retractor axle, said entrainment disc engaging portions of said entrainment lugs.
Claim 9
Dependent Claim
27 words
A retractor device for safety belts according to claim 6 wherein said bores in said guide disc extend substantially in a direction tangential of said retractor axle.
Claim 10
Dependent Claim
24 words
A retractor device for safety belts according to claim 7 and further comprising a return spring coupling said guide disc to said entrainment disc.
Claim 11
Dependent Claim
77 words
A retractor device for safety belts according to claim 1 wherein said locking members are arranged on one side of said casing, said shaft has a second ratchet wheel, one ratchet wheel mounted at one end of said shaft and the second ratchet wheel mounted at the other end of said shaft, and said latch member has a second locking arm, each ratchet wheel being adapted to be engaged by a locking arm of said latch member.
Claim 12
Dependent Claim
32 words
A retractor device according to claim 1 wherein said latch member comprises a yoke and an axle to which said yoke is fixedly secured, said sensor arm being mounted on said axle.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |