US3872622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic drive for sliding doors
Assignee: Eaton Corp
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Filing: 1973-02-26
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Granted: 1975-03-25
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Expires: 1993-02-26
Abstract
Abstract A drive for a pair of sliding doors including a linear motor having its stator fixed relative to the frame of the doors and its armature connected to a pulley and rope assembly which is movable therewith to effect opening of the doors. Means are provided for adjusting the axis of rotation of the pulleys in three planes to adjust the tension on the rope and adjust the alignment of the pulleys.
Inventors
- 👤 Kurt Berk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:38
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
237 words
A drive for at least a pair of sliding doors comprising an electrical linear motor having a fixed stator and a movable armature, first and second pulleys mounted adjacent to the sliding door, flexible means attached to opposite ends of said armature member and extending around said first and second pulleys, said flexible means when attached to said armature and extending around said first and second pulleys having first and second portions which move in opposite directions upon energization of said linear motor, said armature when moved in a first direction upon energization of said linear motor effecting movement of said first portion of said flexible means in said first direction and effecting movement of said second portion of said flexible means in a second direction opposite said first direction, first connecting means connecting one of said sliding doors to said first portion of said flexible means, second connecting means connecting another of said sliding doors to said second portion of said flexible means to enable movement of said armature in said first direction to effect movement of said one door in said first direction and movement of said other door in said second direction to effect opening of the doors, and means for adjusting each of said first and second pulleys in three planes to control the tension on said flexible means and control the alIgnment of said first and second pulleys relative to each other.
Claim 2
Dependent Claim
237 words
A drive for at least a pair of sliding doors comprising an electrical linear motor having a fixed stator and a movable armature, first and second pulleys mounted adjacent to the sliding door, flexible means attached to opposite ends of said armature member and extending around said first and second pulleys, said flexible means when attached to said armature and extending around said first and second pulleys having first and second portions which move in opposite directions upon energization of said linear motor, said armature when moved in a first direction upon energization of said linear motor effecting movement of said first portion of said flexible means in said first direction and effecting movement of said second portion of said flexible means in a second direction opposite said first direction, first connecting means connecting one of said sliding doors to said first portion of said flexible means, second connecting means connecting another of said sliding doors to said second portion of said flexible means to enable movement of said armature in said first direction to effect movement of said one door in said first direction and movement of said other door in said second direction to effect opening of the doors, and means for adjusting each of said first and second pulleys in three planes to control the tension on said flexible means and control the alIgnment of said first and second pulleys relative to each other.
Claim 3
Dependent Claim
97 words
A drive for sliding doors as defined in claim 1 wherein said means for adjusting said pulleys include a first bracket for rotatably supporting one of said pulleys, a second bracket attached to a support, an adjustable bracket supported by said second bracket and adjustable in a plane perpendicular to the movement of said armature, said first bracket being connected to said adjustable bracket and being movable relative to said adjustable bracket in a direction parallel to the direction of movement of said armature and in a direction skewed from the direction of movement of said armature.
Claim 4
Dependent Claim
49 words
A drive for sliding doors as defined in claim 2 further including a plurality of set screws interconnecting said adjustable bracket and said second bracket, said set screws being adjustable to control movement of said adjustable bracket in a plate perpendicular to the direction of movement of said armature.
Claim 5
Dependent Claim
52 words
A drive for sliding doors as defined in claim 3 further including ball and socket means for connecting said first bracket to said adjustable bracket and providing for movement of said first bracket relative to said adjustable bracket in a direction about the axis of rotation of said ball and socket means.
Claim 6
Dependent Claim
43 words
A drive for sliding doors as defined in claim 4 further including adjusting screws for interconnecting said first bracket and said adjustable bracket and providing for movement of said first bracket in a direction parallel to the direction of movement of said armature.
Claim 7
Dependent Claim
130 words
A drive for sliding doors comprising a drive motor having a movable output member, a pulley mounted in the vicinity of one of said sliding doors, rope means for sliding said one of said doors in response to movement of said output member of said drive motor, and alignment means for orienting said pulley with respect to said output member of said drive motor, said alignment means including individual adjustment means for establishing a particular direction of orientation between said pulley and said output member, said alignment means further including a bracket for rotatably mounting said pulley and a plate mounted to a rigidly fixed structure in the vicinity of said one of said sliding doors, said bracket being adjustable with respect to said plate by said individual adjustment means.
Claim 8
Dependent Claim
130 words
A drive for sliding doors comprising a drive motor having a movable output member, a pulley mounted in the vicinity of one of said sliding doors, rope means for sliding said one of said doors in response to movement of said output member of said drive motor, and alignment means for orienting said pulley with respect to said output member of said drive motor, said alignment means including individual adjustment means for establishing a particular direction of orientation between said pulley and said output member, said alignment means further including a bracket for rotatably mounting said pulley and a plate mounted to a rigidly fixed structure in the vicinity of said one of said sliding doors, said bracket being adjustable with respect to said plate by said individual adjustment means.
Claim 9
Dependent Claim
42 words
A drive for sliding doors as set forth in claim 6 wherein said individual adjustment means includes adjustment screws mounted to said rigidly fixed structure to move said plate and said bracket in a direction substantially parallel to said rigidly fixed structure.
Claim 10
Dependent Claim
41 words
A drive for sliding doors as set forth in claim 6 wherein said individual adjustment means includes a ball and socket connection between said bracket and said plate to allow an angular orientation of said bracket with respect to said plate.
Claim 11
Dependent Claim
37 words
A drive for sliding doors as set forth in claim 6 wherein said individual adjustment means includes a pair of adjustable screws mounted to said bracket to maintain a predetermined space between said bracket and said plate.
Claim 12
Dependent Claim
48 words
A drive for sliding doors as set forth in claim 6 wherein said drive motor includes an electrical linear motor having a fixed stator and said movable output member includes a movable armature alignable with respect to said stator by said individual adjustment means of said alignment means.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |