US4050191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knockdown apparatus for supporting and driving overhung doors
Assignee: YKK Corp
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Filing: 1975-10-20
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Granted: 1977-09-27
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Expires: 1995-10-20
Abstract
Abstract A drive assembly, driven assembly and track assembly are provided separately for ready installation on a doorframe to support and drive a pair of overhung doors. The drive assembly comprises a pulley and its drive mechanism which are mounted on a common bracket to be fastened to one of the jambs of the doorframe, whereas the driven assembly includes an idler pulley mounted on another bracket to be fastened to the other jamb. The track assembly comprises a rail bolted at both ends to the two brackets, and two pairs of door hangers in rolling engagement with the rail for suspending the respective doors therefrom. The door hangers are attached to an endless wire rope extending around the pulleys.
Inventors
- 👤 Akira Azuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:06
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/06; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/632; E05F15/643; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
187 words
A door support apparatus for installation between a pair of side jambs of a doorframe to support and drive a suspended door, said apparatus comprising, in combination: a. a drive assembly comprising, 1. a first bracket adapted to be removably fastened to one of said side jambs; 2. a drive wheel rotatably mounted on said first bracket; and 3. a drive mechanism mounted on said first bracket and drivably connected to impart rotation to said drive wheel; b. a driven assembly comprising, 1. a second bracket adapted to be removably fastened to the other of said side jambs; and 2. an idler wheel rotatably mounted on said second bracket; c. An endless flexible member interconnecting said wheels; and d. a track assembly comprising, 2. a rail removably fastened at both ends to and supported by said first and second brackets to provide an overhead track for the door; and 2. at least a pair of door hangers in rolling engagement with said rail and adapted to suspend the door therefrom, said door hangers being attached to said endless, flexible member for moving the door along said track.
Claim 2
Dependent Claim
187 words
A door support apparatus for installation between a pair of side jambs of a doorframe to support and drive a suspended door, said apparatus comprising, in combination: a. a drive assembly comprising, 1. a first bracket adapted to be removably fastened to one of said side jambs; 2. a drive wheel rotatably mounted on said first bracket; and 3. a drive mechanism mounted on said first bracket and drivably connected to impart rotation to said drive wheel; b. a driven assembly comprising, 1. a second bracket adapted to be removably fastened to the other of said side jambs; and 2. an idler wheel rotatably mounted on said second bracket; c. An endless flexible member interconnecting said wheels; and d. a track assembly comprising, 2. a rail removably fastened at both ends to and supported by said first and second brackets to provide an overhead track for the door; and 2. at least a pair of door hangers in rolling engagement with said rail and adapted to suspend the door therefrom, said door hangers being attached to said endless, flexible member for moving the door along said track.
Claim 3
Dependent Claim
39 words
A door-support apparatus as claimed in claim 1, wherein each of said first and second brackets includes a mounting plate having holes therethrough for insertion of fasteners for use in removably fastening said brackets to the vertical side jambs.
Claim 4
Dependent Claim
47 words
A door-support apparatus as claimed in claim 1, wherein each of said first and second brackets includes a portion having holes therethrough for reception of fasteners by which said brackets are detachably secured to said rail, said rail including a web having holes therethrough receiving such fasteners.
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |