US3612207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle door lock safety latching systems
Assignee: Renault SA
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Filing: 1970-05-11
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Granted: 1971-10-12
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Expires: 1990-05-11
Abstract
Abstract This latching system comprises a control member with, for each door, a coil movable axially between a pair of ferrite disks, the reversal of current in the coil causing the reversal of the direction of travel thereof, all the coils being connected in parallel to the output terminals of at least one four-pole reversing switch of the transistory action, front-contact type, connected to a source of current, the control member constituting a compact unit independent of the door lock, said reversing switch being adapted to be actuated by means of either an external key for the front door lock or a control member accessible from the interior of the vehicle.
Inventors
- 👤 Alain Cabanes
- 👤 Andre Lefeuvre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:30
CPC Classifications
E; E05; E05B; E05B77/00; E05B77/46; E05B77/48; Y; Y10; Y10T; Y10T70/00; Y10T70/60; Y10T70/625; Y10T70/65
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
250 words
A system for electromagnetically latching and unlatching the locked and unlocked condition of all the doors of a vehicle, at least one of the front doors being adapted to be locked by means of an external key, each door comprising to this end a pivoting latch member for latching the door opening control device, said latch member being connected through a link to a control member comprising a coil adapted to be energized from a current source of the vehicle and movable between a pair of coaxial aligned ferrite disks or permanent magnets having an axial magnetization and so directed that the action exerted by said ferrites or permanent magnets on the coil is additive, the reversal of the current flow through the coil being attended by a reversal of the movement of said coil, this system being characterized in that all the coils are connected in parallel to the pair of output terminals of at least one four-pole reversing switch of the transitory-action, front-contact type, of which the pair of input terminals are connectEd to the two terminals of the source of current of the vehicle said control member constituting a compact unit separate from the lock, said reversing switch being adapted to be actuated on the one hand by means of the external key provided for locking one of the front doors, through the medium of the corresponding latch member, and on the other hand by means of a control member accessible from the interior of the vehicle.
Claim 2
Independent Claim
250 words
A system for electromagnetically latching and unlatching the locked and unlocked condition of all the doors of a vehicle, at least one of the front doors being adapted to be locked by means of an external key, each door comprising to this end a pivoting latch member for latching the door opening control device, said latch member being connected through a link to a control member comprising a coil adapted to be energized from a current source of the vehicle and movable between a pair of coaxial aligned ferrite disks or permanent magnets having an axial magnetization and so directed that the action exerted by said ferrites or permanent magnets on the coil is additive, the reversal of the current flow through the coil being attended by a reversal of the movement of said coil, this system being characterized in that all the coils are connected in parallel to the pair of output terminals of at least one four-pole reversing switch of the transitory-action, front-contact type, of which the pair of input terminals are connectEd to the two terminals of the source of current of the vehicle said control member constituting a compact unit separate from the lock, said reversing switch being adapted to be actuated on the one hand by means of the external key provided for locking one of the front doors, through the medium of the corresponding latch member, and on the other hand by means of a control member accessible from the interior of the vehicle.
Claim 3
Dependent Claim
42 words
Electromagnetic latching system according to claim 1, characterized in that the distance between said ferrite disks is greater than the diameter of said ferrite disks, and that the length of said coil is less than half the distance between said ferrite disks.
Claim 4
Dependent Claim
83 words
Electromagnetic latching system according to claim 1, characterized in that the reversing-switch is of the three-position type, that is, an open, mechanically stable position in which all the coils are deenergized, and a pair of closed positions in which energizing current is supplied to all the coils, said last-named two closed positions being maintained only by a voluntary action of the user, the direction of flow of the energizing current through the coils depending on the selected closed position of said reversing switch.
Claim 5
Dependent Claim
147 words
Electromagnetic latching system according to claim 3, wherein said reversing switch comprises a pivoting control shaft urged by spring means to its inoperative position, characterized in that said control shaft is rigid on the one hand with a lever arm carrying a projection extending into the path of a corresponding heel carried by the latch member actuatable by means of said lock key, and on the other hand with a pair of movable contacts each comprising a metal blade supporting a pair of contacts adapted, in the inoperative position, to lie between two pairs of fixed contact studs, without touching them, said fixed contact studs comprising two current input studs and two current output studs and being connected in parallel to all the coils, said movable contacts being adapted, in either of their transistory contact positions, to interconnect said input contact studs to said output contact studs.
Claim 6
Dependent Claim
26 words
Electromagnetic latching system according to claim 3, characterized in that said control shaft of said reversing switch and said control member are rigid with each other.
Claim 7
Dependent Claim
51 words
Electromagnetic latching system according to claim 1, characterized in that an inertia switch having normally open contacts is connected in parallel to said control coils and adapted to energize said coils with a current flowing in the door unlatching direction in case of crash or severe shock applied to the vehicle.
Claim 8
Dependent Claim
75 words
Electromagnetic latching system according to claim 1, characterized in that said control member incorporates bodies of magnetic material in order to distribute the lines of force of the magnetic field in such a manner as to produce the maximum power in said assembly, said bodies comprising on the one hand the entire yoke or spool of the coil, on the other hand a yoke-forming case adapted to close the magnetic circuits of each ferrite disk.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |