Patent US914489A successfully refreshed from Google Patents.
Patent US3845969A successfully refreshed from Google Patents.
US3845969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door dolly
Assignee: Individual
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Filing: 1973-07-31
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Granted: 1974-11-05
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Expires: 1993-07-31
Abstract
Abstract A dolly is provided by attaching upright angle brackets to the leaves of a butt type hinge. Two wheels are mounted to the lower flanges of the angle brackets and the weight of the door causes the upright flanges of the angle brackets to be urged toward one another by pivoting about the hinge pivot axis. A clamp on the underside of the hinge also holds the door to be transported on the dolly.
Inventors
- 👤 J Nadeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:07
CPC Classifications
B; B62; B62B; B62B5/00; B62B5/0083; B62B1/00; B62B1/26; B62B1/268
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
A dolly for transporting large flat objects comprising; a. a butt hinge having two horizontally extending leaves pivotally connected to one another by a hinge pin, b. two L-shaped brackets, each of which has a base leg attached to the upper face of one of said hinge leaves, and said bracket having upstanding legs for receiving an object edgewise therebetween, c. a clamping cross arm one end of which is attached to the lower face of one of said hinge leaves, and the other end of which defines a threaded opening oriented normally to the lower face of the other of said hinge leaves, d. a clamping screw threadably received in said cross arm opening for engaging said other hinge leaf to urge said upstanding legs toward one another, and e. stub shafts extending horizontally outwardly from said base legs, and said shafts rotatably supporting wheels thereon.
Claim 2
Dependent Claim
147 words
A dolly for transporting large flat objects comprising; a. a butt hinge having two horizontally extending leaves pivotally connected to one another by a hinge pin, b. two L-shaped brackets, each of which has a base leg attached to the upper face of one of said hinge leaves, and said bracket having upstanding legs for receiving an object edgewise therebetween, c. a clamping cross arm one end of which is attached to the lower face of one of said hinge leaves, and the other end of which defines a threaded opening oriented normally to the lower face of the other of said hinge leaves, d. a clamping screw threadably received in said cross arm opening for engaging said other hinge leaf to urge said upstanding legs toward one another, and e. stub shafts extending horizontally outwardly from said base legs, and said shafts rotatably supporting wheels thereon.
Claim 3
Dependent Claim
34 words
The device as set forth in claim 1 wherein said base leg of at least one of said L-shaped brackets is adjustably attached to its associated hinge leaf to accommodate objects of varying widths.
Claim 4
Dependent Claim
28 words
The device as set forth in claim 2 wherein said upstanding legs of both L-shaped brackets are padded to prevent damage to an object clamped in the 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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |