US3745705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated linear door operator
Assignee: Vapor Corp
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Filing: 1972-04-24
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Granted: 1973-07-17
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Expires: 1992-04-24
Abstract
Abstract A door operator for driving a track guided door through opening and closing cycles, including a rotating shaft and drive member movable therealong in response to rotation wherein the drive member is resiliently coupled to a door. A locking mechanism is provided for locking the door in closed position and an emergency device enables opening of the door when power is not available.
Inventors
- 👤 R Reddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:03
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/632; E05F15/655; E05F15/657; E05F11/00; E05F11/54; E05F15/40; E05F15/41; E05F15/652; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/21; E05Y2201/214; E05Y2201/216; E05Y2201/218; E05Y2201/22; E05Y2201/23; E05Y2201/232; E05Y2201/234; E05Y2201/244; E05Y2201/246; E05Y2201/40; E05Y2201/43; E05Y2201/434; E05Y2201/47; E05Y2201/60; E05Y2201/622; E05Y2201/676; E05Y2201/68; E05Y2201/696; E05Y2201/702; E05Y2400/00; E05Y2400/10; E05Y2400/30; E05Y2400/3013; E05Y2400/3014; E05Y2400/31; E05Y2400/32; E05Y2400/35; E05Y2400/354; E05Y2400/50; E05Y2400/51; E05Y2400/52; E05Y2400/53; E05Y2400/54; E05Y2400/55; E05Y2400/552; E05Y2600/00; E05Y2600/10; E05Y2600/13; E05Y2800/00; E05Y2800/25; E05Y2800/252; E05Y2900/00; E05Y2900/50; E05Y2900/51
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
205 words
A linear door operator for driving a track guided door between open and closed positions, said operator comprising an elongated screw-threaded shaft rotatably mounted on a support, a reversible motor connected to said shaft to rotate same, a nut on said shaft, means resiliently coupling the nut to the door, said shaft and nut drive having an efficiency such that pressure on the door capable of being exerted manually will cause rotation of the screw without power to move the nut and allow sliding of the door, means for locking the door in closed position including a lock wheel mounted on and rotatable with the shaft at least during its rotation for the opening cycle and a lock pawl carried by said support coacting with the lock wheel, means mounting said lock pawl for movement between a first position in engagement with the wheel to lock the shaft against rotation for the opening cycle and a second position to unlock the shaft so it is free to rotate, means for moving the lock pawl into said second position at the beginning of an opening cycle, and means holding the lock pawl in said second position through the opening cycle and substantially the entire closing cycle.
Claim 2
Dependent Claim
205 words
A linear door operator for driving a track guided door between open and closed positions, said operator comprising an elongated screw-threaded shaft rotatably mounted on a support, a reversible motor connected to said shaft to rotate same, a nut on said shaft, means resiliently coupling the nut to the door, said shaft and nut drive having an efficiency such that pressure on the door capable of being exerted manually will cause rotation of the screw without power to move the nut and allow sliding of the door, means for locking the door in closed position including a lock wheel mounted on and rotatable with the shaft at least during its rotation for the opening cycle and a lock pawl carried by said support coacting with the lock wheel, means mounting said lock pawl for movement between a first position in engagement with the wheel to lock the shaft against rotation for the opening cycle and a second position to unlock the shaft so it is free to rotate, means for moving the lock pawl into said second position at the beginning of an opening cycle, and means holding the lock pawl in said second position through the opening cycle and substantially the entire closing cycle.
Claim 3
Dependent Claim
27 words
A linear door operator as defined in claim 1, and a one-way clutch between the shaft and lock wheel permitting overrunning by the shaft during closing roTation.
Claim 4
Dependent Claim
33 words
A linear door operator as defined in claim 1, wherein said resilient coupling means includes a bracket assembly secured to the door and resilient means interposed between the bracket assembly and the nut.
Claim 5
Dependent Claim
42 words
A linear door operator as defined in claim 1, wherein said resilient coupling means includes a pair of spaced apart arms attached to the door, one arranged on each side of the nut, and a spring between the nut and each arm.
Claim 6
Dependent Claim
21 words
A linear door operator as defined in claim 1, wherein said lock wheel includes a plurality of circumferentially spaced pawl notches.
Claim 7
Dependent Claim
34 words
A linear door operator as defined in claim 1, wherein said lock pawl moving means includes a solenoid having a plunger engaging the lock pawl when energized to move it into said second position.
Claim 8
Dependent Claim
52 words
A linear door operator as defined in claim 1, wherein said lock pawl holding means inludes a latch spring biased to engage and hold the lock pawl in said second position, and means on said coupling means engaging the latch to release the lock pawl as the door returns to closed position.
Claim 9
Dependent Claim
39 words
A linear door operator as defined in claim 1, and an emergency lever mounted on said support movable between a first position at rest and a second position which causes the lock pawl to move into said second position.
Claim 10
Dependent Claim
25 words
A linear door operator as defined in claim 8, wherein said emergency lever includes an arm engaging the door to move it toward open position.
Claim 11
Dependent Claim
18 words
A linear door operator as defined in claim 1, and a limit switch actuator driven by said shaft.
Claim 12
Dependent Claim
35 words
A linear door operator as defined in claim 10, wherein said limit switch actuator includes a worm on said shaft and a worm wheel in engagement with said worm and rotatably mounted on said support.
Claim 13
Dependent Claim
20 words
A linear door operator as defined in claim 1, and an obstruction sensing means responsive to said resilient coupling means.
Claim 14
Dependent Claim
29 words
A linear door operator as defined in claim 1, wherein the motor is connected directly to the screw-threaded shaft to drive same at the same speed as the motor.
Claim 15
Dependent Claim
57 words
A linear door operator as defined in claim 1, and manual operable locking means for locking the doors in closed position including a bolt movable and coacting with means on the doors, and a cutout switch operable upon actuation of the locking means to remove the operator from the door train line when the doors are locked.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |