Patent US3622718A successfully refreshed from Google Patents.
US3622718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety devices for starter motors of internal-combustion engines
Assignee: Valeo Neiman SA
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Filing: 1970-01-29
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Granted: 1971-11-23
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Expires: 1990-01-29
Abstract
Abstract Safety device for preventing the actuation of an electric starter motor of an internal-combustion engine already running and providing a source of low pressure, this device comprising a key-operated safety-lock body, with or without a disc-shaped cam member for controlling an antitheft device and rigid with a member controlling the rotor of a rotary switch provided with terminal pins for connecting said switch to electric circuits to be controlled, including the energizing switch of said starter motor, wherein said lock body has formed therein a chamber connected to said source of low pressure of the engine and a member movable in said chamber and responsive on the one hand to the action of said low pressure and on the other hand to that of a resilient reaction member, said movable member being associated with said lock with a view to prevent said switch from closing the energizing circuit of said starter motor when the engine is running, and to permit the action of said switch with respect to said starter motor when the engine is inoperative.
Inventors
- 👤 Paul Lipschutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:03
CPC Classifications
H; H01; H01H; H01H27/00; H01H27/06; H01H27/063; F; F01; F01L; F01L1/00; F01L2710/00; F01L2710/006; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5889; Y10T70/5956
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
A safety device for preventing energization of an electric starter motor of an internal-combustion engine which is already running and providing a source of low pressure, the device comprising a body, a key-operated safety-lock member rotatably mounted in said body, switch means having a rotor adapted to close at least one electric circuit including an energizing circuit for said starter motor, said switch means being mounted in said body and connected to be rotated by said safety-lock member, a chamber in said body connected to said source of low pressure, a piston member mounted in said chamber for movement in one direction when the engine is operating and in response to said low pressure and in the opposite direction when the engine is stopped, spring means biasing said piston member in said opposite direction, and means on said piston member to prevent rotation of said rotor when said piston member is moved in said one direction thereby preventing closure of the circuit of said starter motor when the engine is running.
Claim 2
Dependent Claim
171 words
A safety device for preventing energization of an electric starter motor of an internal-combustion engine which is already running and providing a source of low pressure, the device comprising a body, a key-operated safety-lock member rotatably mounted in said body, switch means having a rotor adapted to close at least one electric circuit including an energizing circuit for said starter motor, said switch means being mounted in said body and connected to be rotated by said safety-lock member, a chamber in said body connected to said source of low pressure, a piston member mounted in said chamber for movement in one direction when the engine is operating and in response to said low pressure and in the opposite direction when the engine is stopped, spring means biasing said piston member in said opposite direction, and means on said piston member to prevent rotation of said rotor when said piston member is moved in said one direction thereby preventing closure of the circuit of said starter motor when the engine is running.
Claim 3
Dependent Claim
85 words
A safety device according to claim 1, further comprising a cam integral with said safety-lock member having a groove formed therein, said means on said piston comprising a stud adapted to move parallel with the axis of rotation of said switch rotor and to drop in said groove when the piston moves in said one direction, said groove having a limiting contour against which said stud abuts to prevent said switch rotor from being rotated to a position in which the starter motor is energized.
Claim 4
Dependent Claim
117 words
A safety device according to claim 1, wherein said piston has its axis disposed at right angles to the axis of rotation of said switch rotor, said piston being formed with two cylindrical end portions and a notched portion therebetween, further comprising a cam integral with said safety-lock member and having therein a toroidal groove engaged by one of the ends of said piston when the latter is moved by the engine in said one direction so as to positively lock said cam against movement to a starter motor-energization position when the engine is running, said notched piston portion being aligned with the cam when the engine is not operating thereby permitting free rotation of said rotor.
Claim 5
Dependent Claim
122 words
A safety device according to claim 1, further comprising a cam integral with said safety-lock member and having an arcuate groove therein, said piston having its axis disposed at right angles to and convergent with the axis of rotation of said switch rotor, said means on said piston comprising a finger rigid with said piston and adapted to engage said arcuate groove in said cam, an external notch in said groove so disposed that said finger engages into said notch when said engine moves said piston in said one direction and locks said cam against rotation to a position for energizing said starter motor, said finger being released from said notch when the engine stops to permit rotation of said switCh rotor.
Claim 6
Dependent Claim
100 words
A safety device according to claim 1, wherein said piston has its axis parallel to the axis of rotation of said switch rotor and has a notch therein, a pivotally mounted bell-crank lever having a first arm engaged in said notch to be driven by said piston during the movement thereof, and a second pivoting arm connected with a movable contact of said switch relied to the starter motor energizing circuit, said movable contact being positively held out of contact with said switch rotor when the engine moves said piston in said one direction thereby opening the starter motor circuit.
Claim 7
Dependent Claim
66 words
A safety device according to claim 1, further comprising a case having a chamber therein, a diaphragm mounted in said chamber, conduit means connecting said chamber to said internal-combustion engine so that said diaphragm is displaced in response to the running of said engine, and means connecting said diaphragm to said piston whereby said piston is moved in said one direction when said engine is running.
Claim 8
Dependent Claim
23 words
A safety device according to claim 1, further comprising an antitheft device and means on said safety-lock member to control said antitheft device.
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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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |