Patent US3825205A successfully refreshed from Google Patents.
US3825205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor vehicle safety devices
Assignee: Takata Kogyo Co Ltd
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Filing: 1972-06-08
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Granted: 1974-07-23
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Expires: 1992-06-08
Abstract
Abstract A vehicle safety belt system includes a spring rewind belt retractor reel provided with a solenoid actuated brake and a network controlled by an inertia switch to brake the reel by the energization or deenergization of the solenoid and to maintain the reel in a braked condition an adjustable time interval following the deactuation of the inertia switch. The network includes a solid state Darlington switch having across its input a memory capacitor which is charged by the actuation of the inertia switch and a relay across its output which controls the brake solenoid.
Inventors
- 👤 T Takada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:40
CPC Classifications
B; B60; B60R; B60R22/00; B60R22/34; B60R22/343; B60R22/12; B60R22/16; B60R19/00; B60R19/52; B60R2019/525; B60R2019/527; B60R22/48; B60R2022/4808; B60R2022/4816; B60R2022/4825; B60R2022/4858
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
201 words
An automatic locking safety belt retraction mechanism in a vehicle, comprising a safety belt movable between withdrawn and retracted positions, means normally urging said belt toward its retracted position, braking means for alternatively releasing or locking said safety belt against withdrawal, an inertia switch mounted on said vehicle for movement therewith and including a pair of stationary first and second contacts and a movable contact normally engaging said first contact and switch actuating means responsive to a predetermined change in vehicle motion for transferring said movable contact from its deactuated position in engagement with said first stationary contact through an intermediate position neutral position out of engagement with both said stationary contacts to an actuated position in engagement with said second stationary contact, means responsive to the transfer of said movable contact from said deactuated position and independent of the transfer of said movable contact to said actuated position for activating said braking means to a safety belt locking condition and timing means actuated in response to the transfer of said movable contact to said actuated position for maintaining said braking means in a locking condition a predetermined time interval following the transfer of said movable contact from said actuated position.
Claim 2
Dependent Claim
201 words
An automatic locking safety belt retraction mechanism in a vehicle, comprising a safety belt movable between withdrawn and retracted positions, means normally urging said belt toward its retracted position, braking means for alternatively releasing or locking said safety belt against withdrawal, an inertia switch mounted on said vehicle for movement therewith and including a pair of stationary first and second contacts and a movable contact normally engaging said first contact and switch actuating means responsive to a predetermined change in vehicle motion for transferring said movable contact from its deactuated position in engagement with said first stationary contact through an intermediate position neutral position out of engagement with both said stationary contacts to an actuated position in engagement with said second stationary contact, means responsive to the transfer of said movable contact from said deactuated position and independent of the transfer of said movable contact to said actuated position for activating said braking means to a safety belt locking condition and timing means actuated in response to the transfer of said movable contact to said actuated position for maintaining said braking means in a locking condition a predetermined time interval following the transfer of said movable contact from said actuated position.
Claim 3
Dependent Claim
90 words
The mechanism of claim 1 wherein said belt retraction means comprises a reel upon which said belt is wound and spring means urging said reel in a belt winding direction and said braking means comprises a ratchet rotatable with said reel and a pawl movable into and out of engagement with said ratchet and said brake activating means comprises a solenoid and means responsive to the position of said movable contact for controlling the energization of said solenoid and an armature actuated by said solenoid and coupled to said pawl.
Claim 4
Dependent Claim
34 words
The mechanIsm of claim 2 including means for normally urging said pawl toward engagement with said ratchet, said pawl being movable to a ratchet disengage position in response to the energization of said solenoid.
Claim 5
Dependent Claim
23 words
The mechanism of claim 1 wherein said activating means comprises a pendulum, said movable contact being responsive to the position of said pendulum.
Claim 6
Dependent Claim
63 words
The mechanism of claim 1 wherein said brake activating mechanism comprises a source of current, a solid state switch, a solenoid, means responsive to the output of said solid state switch for connecting said solenoid across said source of current and means responsive to the position of said movable contact for applying a control signal to the input of said solid state switch.
Claim 7
Dependent Claim
22 words
The mechanism of claim 5 wherein said timing means comprises a timing capacitor connected to the input of said solid state switch.
Claim 8
Dependent Claim
13 words
The mechanism of claim 6 including a variable resistor connected across said capacitor.
Claim 9
Dependent Claim
16 words
The mechanism of claim 6 wherein said solid state switch comprises a Darlington connected transistor amplifier.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |