Patent US5675650A successfully refreshed from Google Patents.
Patent US3579909A successfully refreshed from Google Patents.
US3579909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced door
Assignee: SCHACHT ASSOCIATES Inc
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Filing: 1969-07-16
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Granted: 1971-05-25
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Expires: 1989-07-16
Abstract
Abstract A balanced door, namely, a door which swings on upper and lower arms which are connected thereto and to a pivotally movably vertical torque rod, is provided with a door check and closer device, the arrangement being such that the door check and closer device can be readily installed through the top of the door and readily removed through the top of the door, when the door is opened and tilted in its own plane in a direction away from the torque rod, thereby making it unnecessary to remove the door from the door frame to install or remove the door check and closer device. The connections between the door and said arms are within the door thus eliminating the pivot projections referred to in the art as ''''blisters'''' or knuckles.
Inventors
- 👤 Ralph Turner
- 👤 Louis L Schacht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:52
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
155 words
A balanced door, comprising top and bottom swinging arms on which said door is mounted for movement to open and close the door, a door check device within said door, means for mounting said device within and near the top of the door in position under said top arm, means releasably connecting said top arm to said device, a stationary guide track for the door positioned above said top arm, and means secured to the door carrying a bearing movably guided by said track and thereby causing said arms to swing when the door is moved to open or close it, said bottom arm having a pivot for the bottom of the door, said pivot being disposed between the opposite sides of the door, and a movable clearance member which is positioned at the bottom and is engageable by the pivot end of said bottom arm and is thereby movable to clear said pivot end.
Claim 2
Dependent Claim
155 words
A balanced door, comprising top and bottom swinging arms on which said door is mounted for movement to open and close the door, a door check device within said door, means for mounting said device within and near the top of the door in position under said top arm, means releasably connecting said top arm to said device, a stationary guide track for the door positioned above said top arm, and means secured to the door carrying a bearing movably guided by said track and thereby causing said arms to swing when the door is moved to open or close it, said bottom arm having a pivot for the bottom of the door, said pivot being disposed between the opposite sides of the door, and a movable clearance member which is positioned at the bottom and is engageable by the pivot end of said bottom arm and is thereby movable to clear said pivot end.
Claim 3
Dependent Claim
32 words
A balanced door according to claim 1, wherein the frame structure in which the door is mountEd has an upper horizontal part which overlies and conceals the front of the top arm.
Claim 4
Dependent Claim
76 words
A balanced door according to claim 1, wherein said door check device comprises a vertical spindle having a noncircular peripheral part, and wherein said means releasably connecting said top arm to said device comprises a member secured to said top arm at its underside by fastening means accessible from above said top arm and having a noncircular opening in which said noncircular part of said spindle fits for releasably connecting said top arm to said device.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |