Patent US2916838A successfully refreshed from Google Patents.
Patent US3894356A successfully refreshed from Google Patents.
US3894356A
Expired / Lapsed
US
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Door coordinator
Assignee: LEIGH PRODUCTS Inc
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Filing: 1974-03-28
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Granted: 1975-07-15
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Expires: 1994-03-28
Abstract
Abstract A door coordinator for pairs of swinging doors comprising a pair of arms on a common hub pivotally mounted in a bracket on the door frame, a longer arm adapted to move vertically into and out of the path of an active door and a shorter arm provided with a cam surface supplemented or constituted by a roller so located that the inactive door engages the cam surface and/or the roller for controlling the vertical movement of the shorter arm relative to the inactive door and the simultaneous vertical movement of the longer arm into and out of the path of the active door.
Inventors
- 👤 William B Imhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:40
CPC Classifications
E; E05; E05F; E05F5/00; E05F5/12; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/606; E05Y2201/62; E05Y2201/622; E05Y2201/624; E05Y2201/706; E05Y2600/00; E05Y2600/10; E05Y2600/30; E05Y2600/32; E05Y2600/322; E05Y2800/00; E05Y2800/20; E05Y2800/22; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10T; Y10T292/00; Y10T292/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
202 words
A door coordinator adapted to control the closing of a pair of swinging doors constituted by an active door and an inactive door hung to swing into and out of closed position beneath a head frame, the coordinator comprising a hub, means mounting the hub on the head frame for rotation about a horizontal axis higher than the top edges of the doors, a pair of arms of unequal length fixed to and projecting from the hub and having their axes in a plane containing the axis of the hub, means limiting the downward swinging movement of said arms, the longer arm being angled with respect to the hub to cause its free end to lie, when below horizontal, in the swinging path of the active door, the shorter arm having a downwardly facing substantially straight elongated cam surface, the cam surface terminating at a bottom edge lying substantially parallel to said plane, and a roller mounted on said shorter arm with its periphery projecting beyond said bottom edge adjacent to the point of termination of the cam surface, said cam surface, in the lower position of the arms, lying in the swinging path of the upper edge of the inactive door.
Claim 2
Dependent Claim
202 words
A door coordinator adapted to control the closing of a pair of swinging doors constituted by an active door and an inactive door hung to swing into and out of closed position beneath a head frame, the coordinator comprising a hub, means mounting the hub on the head frame for rotation about a horizontal axis higher than the top edges of the doors, a pair of arms of unequal length fixed to and projecting from the hub and having their axes in a plane containing the axis of the hub, means limiting the downward swinging movement of said arms, the longer arm being angled with respect to the hub to cause its free end to lie, when below horizontal, in the swinging path of the active door, the shorter arm having a downwardly facing substantially straight elongated cam surface, the cam surface terminating at a bottom edge lying substantially parallel to said plane, and a roller mounted on said shorter arm with its periphery projecting beyond said bottom edge adjacent to the point of termination of the cam surface, said cam surface, in the lower position of the arms, lying in the swinging path of the upper edge of the inactive door.
Claim 3
Dependent Claim
26 words
A door coordinator according to claim 1 wherein the downward swinging movement of said arms is limited to an angle of approximately 15* below the horizontal.
Claim 4
Dependent Claim
30 words
A door coordinator according to claim 1 wherein said straight elongated cam surface is disposed at an angle of approximately 30* to said plane containing the axis of the hub.
Claim 5
Dependent Claim
30 words
A door coordinator according to claim 2 wherein said straight elongated cam surface is disposed at an angle of approximately 30* to said plane containing the axis of the hub.
Claim 6
Dependent Claim
69 words
A door coordinator according to claim 1 wherein the shorter arm has an upwardly facing substantially straight elongated cam surface and upper edge, symmetrical with the downwardly facing cam surface and bottom edge, above and below said plane containing the axis of the hub, and which includes means for mounting a roller on said shorter arm with its periphery projecting beyond said upper edge, whereby said coordinator is reversible.
References Cited (Backward Citations)
US2015996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |