Patent US3921930A successfully refreshed from Google Patents.
US3921930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Winding-up device with automatic lock initiated by friction for a safety belt
Assignee: Individual
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Filing: 1973-03-22
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Granted: 1975-11-25
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Expires: 1993-03-22
Abstract
Abstract A winding-up device for a safety belt in which a winding shaft connected to one end of the belt is normally freely rotatable in both pay-out and take-up direction in a housing. A locking arrangement is provided for locking the shaft to the housing and is operated in response to acceleration of the shaft in pay-out direction. Further means can be provided to operate the locking device in response to acceleration of the housing or of the vehicle in which the housing is mounted.
Inventors
- 👤 Artur Fohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:17
CPC Classifications
B; B60; B60R; B60R22/00; B60R22/34; B60R22/36; B60R22/405; G; G01; G01T; G01T1/00; G01T1/02; G01T1/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
197 words
In combination on a winding-up device for a safety belt; a housing, a winding-up shaft normally freely rotatable in the housing uniformly in both pay-out and take-up directions and connected to one end of a safety belt, a return spring biasing said shaft in take-up direction, locking means responsive to rotary acceleration of said shaft in pay-out direction for locking said shaft to said housing against rotation therein in pay-out direction, said locking means comprising a toothed member on said shaft, a pawl member tiltable in said housing and engageable with said toothed member, a release element carried by said shaft and engaging said pawl member and normally holding the pawl member spaced from said toothed member in pay-out direction and movable from the normal position to enable said pawl member to move into engagement with said toothed member, an inertia body centrically journalled coaxial with said shaft and normally rotatable therewith, said inertia body rotating relative to said shaft in one direction when said shaft is accelerated in pay-out direction, and coupling means operated by movement of said inertia body relative to said shaft in said one direction to couple said shaft to said release element.
Claim 2
Dependent Claim
197 words
In combination on a winding-up device for a safety belt; a housing, a winding-up shaft normally freely rotatable in the housing uniformly in both pay-out and take-up directions and connected to one end of a safety belt, a return spring biasing said shaft in take-up direction, locking means responsive to rotary acceleration of said shaft in pay-out direction for locking said shaft to said housing against rotation therein in pay-out direction, said locking means comprising a toothed member on said shaft, a pawl member tiltable in said housing and engageable with said toothed member, a release element carried by said shaft and engaging said pawl member and normally holding the pawl member spaced from said toothed member in pay-out direction and movable from the normal position to enable said pawl member to move into engagement with said toothed member, an inertia body centrically journalled coaxial with said shaft and normally rotatable therewith, said inertia body rotating relative to said shaft in one direction when said shaft is accelerated in pay-out direction, and coupling means operated by movement of said inertia body relative to said shaft in said one direction to couple said shaft to said release element.
Claim 3
Dependent Claim
27 words
A device in combination according to claim 1 which includes a circumferential surface on said shaft, said release element having a hub portion engaging said circumferential surface.
Claim 4
Dependent Claim
39 words
A device in combination according to claim 1 in which said release element has a free end and concave recess in the free end which engages said pawl member to hold the pawl member spaced from said toothed member.
Claim 5
Dependent Claim
42 words
A device in combination according to claim 1 in which said toothed member is a disc coaxial with said shaft and having teeth with substantially radial leading faces and trailing faces which make angles of less than 90* with the leading faces.
Claim 6
Dependent Claim
60 words
A device in combination according to claim 1 in which said release element has a free end and Concave recess in the free end which engages said pawl member to hold the pawl member spaced from said toothed member, said pawl member having a roller thereon for engagement with said concave recess in the free end of said release element.
Claim 7
Dependent Claim
112 words
A device in combination according to claim 1 in which said release element has an internally toothed hollow hub portion coaxial with said shaft, a pawl pivoted at one end to an eccentric location on said shaft and engageable at the free end with the teeth in said hub portion, a spring biasing the free end of said pawl away from said teeth, and means on said inertia body engaging said pawl and operable when said inertia body moves in said one direction relative to said shaft upon acceleration of said shaft in pay-out direction to move the free end of said pawl into engagement with the teeth in said hub portion.
Claim 8
Dependent Claim
22 words
A device in combination according to claim 1 which includes a spring biasing said pawl member toward engagement with said toothed member.
Claim 9
Dependent Claim
24 words
A device in combination according to claim 1, in which a tension spring is mounted directly between said pawl member and said release element.
Claim 10
Dependent Claim
183 words
In combination on a winding-up device for a safety belt; a housing, a winding-up shaft rotatable in the housing in both pay-out and take-up directions and connected to one end of a safety belt, a return spring biasing said shaft in take-up direction, and locking means responsive to rotary acceleration of said shaft in the pay-out direction for locking said shaft against rotation in the pay-out direction, said locking means comprising a toothed member on said shaft, a pawl member tiltable in said housing and engageable with said toothed member for locking said shaft against rotation in the pay-out direction, a release element carried by said shaft and engaging said pawl member and normally holding the pawl member spaced from said toothed member, means for disengaging said release member from said pawl member in response to a predetermined rate of belt acceleration, and spring means operable to cause said pawl member to move into engagement with said toothed member when said release element is disengaged from said pawl member, said spring means being connected directly between said pawl member and said release element.
Claim 11
Dependent Claim
183 words
In combination on a winding-up device for a safety belt; a housing, a winding-up shaft rotatable in the housing in both pay-out and take-up directions and connected to one end of a safety belt, a return spring biasing said shaft in take-up direction, and locking means responsive to rotary acceleration of said shaft in the pay-out direction for locking said shaft against rotation in the pay-out direction, said locking means comprising a toothed member on said shaft, a pawl member tiltable in said housing and engageable with said toothed member for locking said shaft against rotation in the pay-out direction, a release element carried by said shaft and engaging said pawl member and normally holding the pawl member spaced from said toothed member, means for disengaging said release member from said pawl member in response to a predetermined rate of belt acceleration, and spring means operable to cause said pawl member to move into engagement with said toothed member when said release element is disengaged from said pawl member, said spring means being connected directly between said pawl member and said release element.
Claim 12
Dependent Claim
208 words
A winding-up device for a safety belt, comprising a housing, a winding-up shaft rotatable in the housing in both pay-out and take-up directions and connected to one end of a safety belt, a return spring biasing said shaft in take-up direction, and locking means responsive to rotary acceleration of said shaft in the pay-out direction for locking said shaft against rotation in the pay-out direction, said locking means comprising a toothed member on said shaft, an inertia member adapted for rotation both with and relative to the belt reel, an abutment carried by the inertia member, a clutch member carried by a member rotatable with the reel and which rotates in a path in which the abutment is located, so that on relative rotation of the abutment and the reel due to lagging of the inertia member the abutment can engage the clutch member, an actuating member which is adapted to be coupled to the clutch member when the clutch member is engaged by the abutment, the actuating member being adapted for rotation with the reel when it is coupled to the clutch member, and means actuated by rotational movement of the actuating member to cause the locking member to engage the toothed member to lock the reel.
Claim 13
Dependent Claim
208 words
A winding-up device for a safety belt, comprising a housing, a winding-up shaft rotatable in the housing in both pay-out and take-up directions and connected to one end of a safety belt, a return spring biasing said shaft in take-up direction, and locking means responsive to rotary acceleration of said shaft in the pay-out direction for locking said shaft against rotation in the pay-out direction, said locking means comprising a toothed member on said shaft, an inertia member adapted for rotation both with and relative to the belt reel, an abutment carried by the inertia member, a clutch member carried by a member rotatable with the reel and which rotates in a path in which the abutment is located, so that on relative rotation of the abutment and the reel due to lagging of the inertia member the abutment can engage the clutch member, an actuating member which is adapted to be coupled to the clutch member when the clutch member is engaged by the abutment, the actuating member being adapted for rotation with the reel when it is coupled to the clutch member, and means actuated by rotational movement of the actuating member to cause the locking member to engage the toothed member to lock the reel.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |