US3736483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motorized overhead door opener
Assignee: Individual
•
Filing: 1971-03-23
•
Granted: 1973-05-29
•
Expires: 1991-03-23
Abstract
Abstract The output shaft of a motor is connected directly to a worm shaft which moves a traveler connected to the door. The motor includes a second centrifugal switch in the relay coil circuit whereby the motor will stop upon the door engaging stops in either direction. The worm shaft includes a length of spiral wire locked in place on thin wall tubing rectangular in cross section. The method of producing the worm shaft includes placing the length of spiral wire on a length of cylindrical tubing and then applying pressure to the tubing between adjacent coils causing corners to be formed which lockingly engage the wire coils. A predetermined axial force in either direction on the motor will cause the motor to move relative to the traveler and actuate an interrupter switch and a reversing switch thereby stopping the motor. Upon the relay coil being reactivated the motor will then move in the opposite direction to the end of the cycle where it will then shut off and be ready to repeat the cycle.
Inventors
- 👤 G Conlee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:44
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/665; E05F15/668; E05F15/673; E05F15/40; E05F15/41; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/23; E05Y2201/232; E05Y2201/242; E05Y2400/00; E05Y2400/10; E05Y2400/52; E05Y2400/53; E05Y2400/54; E05Y2400/56; E05Y2400/562; E05Y2900/00; E05Y2900/10; E05Y2900/106
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
111 words
A motorized overhead door opener comprising, an electric motor having its output shaft axially aligned and connected directly to a worm shaft, a traveler assembly engaging said worm shaft for movement therealong upon said worm shaft being rotated, a door assembly being operatively connected to said traveler assembly, an actuator means operatively connected to an electrical control system including said motor, said actuator means being responsive to the predetermined load being placed on said motor whereby said motor is stopped, and said motor being yieldably supported and upon a predetermined axial force being applied to said motor said motor is moved axially operatively causing said actuator means to deactivate said motor.
Claim 2
Dependent Claim
111 words
A motorized overhead door opener comprising, an electric motor having its output shaft axially aligned and connected directly to a worm shaft, a traveler assembly engaging said worm shaft for movement therealong upon said worm shaft being rotated, a door assembly being operatively connected to said traveler assembly, an actuator means operatively connected to an electrical control system including said motor, said actuator means being responsive to the predetermined load being placed on said motor whereby said motor is stopped, and said motor being yieldably supported and upon a predetermined axial force being applied to said motor said motor is moved axially operatively causing said actuator means to deactivate said motor.
Claim 3
Dependent Claim
30 words
The structure of claim 1 wherein an overload is placed on said motor by stops being positioned in the path of said traveler at opposite ends of its linear travel.
Claim 4
Dependent Claim
18 words
The structure of claim 1 wherein brake means is provided for varying the motor resistance to axial movement.
Claim 5
Dependent Claim
35 words
The structure of claim 1 wherein said electrical control system includes an interrupter switch and a reversing switch operatively actuated by said actuator means upon said motor moving in response to said predetermined axial load.
Claim 6
Dependent Claim
68 words
The structure of claim 4 wherein said electrical control system includes a relay switch in one circuit and a coil for said relay in a second circuit, said second circuit including the windings of said motor and said first circuit including a normally open signal input switch and said interrupter switch whereby upon said interrupter switch being opened said relay switch is opened and said motor is deactivated.
Claim 7
Dependent Claim
21 words
The structure of claim 5 wherein said second circuit includes a centrifugal switch adapted to open at a predetermined motor speed.
Claim 8
Dependent Claim
29 words
The structure of claim 5 wherein said actuator means engages said interrupter switch to activate it for an initial portion only of the time said motor is moving axially.
Claim 9
Dependent Claim
20 words
The structure of claim 7 wherein said actuator means engages said reversing switch only after disengagement with said interrupter switch.
Claim 10
Dependent Claim
35 words
The structure of claim 8 wherein said actuator means includes rotatable cams responsive to axial movement of said motor for operative movement into and out of engagement with said interrupter switch and said reversing switch.
Claim 11
Dependent Claim
51 words
The structure of claim 9 wherein a spring is connected to each of said cams for rotating said cams upon said interrupter switch being actuated whereby said one cam moves out of engagement with said interrupter switch stopping said motor and said other cam moves into engagement with said reversing switch.
Claim 12
Dependent Claim
39 words
The structure of claim 10 wherein said control assembly includes a lost motion connection between said motor and said cams whereby upon said spring operating to rotate said cams said motor does not resist rotational movement of said cams.
Claim 13
Dependent Claim
132 words
A motorized overhead door opener comprising, an electric motor having its output shaft axially aligned and connected directly to a worm shaft, a traveler assembly engaging said worm shaft for movement therealong upon said worm shaft being rotated, a door assembly being operatively connected to said traveler assembly, an actuator means operatively connected to an electrical control system including said motor, said actuator means being responsive to the predetermined load being placed on said motor whereby said motor is stopped, and said worm shaft including a substantially square in cross section core member, a length of spiraled wire embracing said core member, said core member engaging said length of spiraled wire at the corners of said core member to limit relative movement between said core member and said length of spiraled wire.
Claim 14
Dependent Claim
132 words
A motorized overhead door opener comprising, an electric motor having its output shaft axially aligned and connected directly to a worm shaft, a traveler assembly engaging said worm shaft for movement therealong upon said worm shaft being rotated, a door assembly being operatively connected to said traveler assembly, an actuator means operatively connected to an electrical control system including said motor, said actuator means being responsive to the predetermined load being placed on said motor whereby said motor is stopped, and said worm shaft including a substantially square in cross section core member, a length of spiraled wire embracing said core member, said core member engaging said length of spiraled wire at the corners of said core member to limit relative movement between said core member and said length of spiraled wire.
Claim 15
Dependent Claim
13 words
The structure of claim 12 wherein said core member is a hollow tube.
Claim 16
Dependent Claim
25 words
The structure of claim 13 wherein Said hollow tube extends beyond the ends of said length of spiraled wire and is circular in cross section.
Claim 17
Dependent Claim
28 words
The structure of claim 14 wherein the outer diameter of said ends is less than the width of said core member measured on a diagonal through opposite corners.
Claim 18
Dependent Claim
80 words
An electric motor having start and run winding and a centrifugal switch connected in series with said start winding, the improvement comprising, a second centrifugal switch in a circuit with a power source, signal input switch, and relay coil, and said relay being in a circuit with said power source, first centrifugal relay coil switch, and said start and run windings, and each of said centrifugal switches being normally closed, and an interrupter switch in series with said relay coil.
Claim 19
Dependent Claim
80 words
An electric motor having start and run winding and a centrifugal switch connected in series with said start winding, the improvement comprising, a second centrifugal switch in a circuit with a power source, signal input switch, and relay coil, and said relay being in a circuit with said power source, first centrifugal relay coil switch, and said start and run windings, and each of said centrifugal switches being normally closed, and an interrupter switch in series with said relay coil.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |