Patent US3767069A successfully refreshed from Google Patents.
US3767069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer lifting device
Assignee: Capacity Bio Inc
•
Filing: 1972-01-12
•
Granted: 1973-10-23
•
Expires: 1992-01-12
Abstract
Abstract A trailer lifting device for use with spotting tractors having motor driven, vertically adjustable fifth wheels for changing the orientation of the fifth wheel on the spotting tractor. The lifting device includes an upright member terminating in a base provided with a connection element for receipt in the fifth wheel of the spotting tractor with which it is used. A flexible attaching element is connected to the upright and is provided with a connector for securing the attaching element to a trailer whereby the one end of the trailer may be raised to changing the vertical position of the fifth wheel on the spotting tractor.
Inventors
- 👤 J White
- 👤 L Molby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:11
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0807; B62D53/0821; B62D49/00; B62D49/005; B62D49/007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
249 words
For use with a spotting tractor having a wheeled frame, a fifth wheel for connection to a trailer movably mounted on the frame, and a selectively operable motor for changing the vertical position of the fifth wheel on the frame, a trailer lifting device comprising: a. an upright member; b. a base on the lower end of said upright member; c. means on said base for receipt by a fifth wheel for releasable connection thereto; d. a flexible attaching element connected to said upright above said base; e. trailer connecting means on the end of said flexible attaching element remote from said upright for releasable connection to a trailer; f. means for effectively varying the length of said flexible attaching element including an elongated, relatively rigid, extensible member interconnecting said flexible element and said upright; g. means pivotally securing one end of said extensible member to said upright; h. a brace of fixed length; i. means pivotally connecting one end of said brace to the other end of said extensible member; and j. means pivotally connecting the other end of said brace to said upright between said base and the point of connection of said extensible member thereto; k. whereby when said lifting device is secured to a spotting tractor fifth wheel, one end of a trailer may be selectively elevated for subsequent connection to a tractor by securing said trailer connecting means to the trailer and operating the motor to elevate the fifth wheel and thus the trailer.
Claim 2
Dependent Claim
249 words
For use with a spotting tractor having a wheeled frame, a fifth wheel for connection to a trailer movably mounted on the frame, and a selectively operable motor for changing the vertical position of the fifth wheel on the frame, a trailer lifting device comprising: a. an upright member; b. a base on the lower end of said upright member; c. means on said base for receipt by a fifth wheel for releasable connection thereto; d. a flexible attaching element connected to said upright above said base; e. trailer connecting means on the end of said flexible attaching element remote from said upright for releasable connection to a trailer; f. means for effectively varying the length of said flexible attaching element including an elongated, relatively rigid, extensible member interconnecting said flexible element and said upright; g. means pivotally securing one end of said extensible member to said upright; h. a brace of fixed length; i. means pivotally connecting one end of said brace to the other end of said extensible member; and j. means pivotally connecting the other end of said brace to said upright between said base and the point of connection of said extensible member thereto; k. whereby when said lifting device is secured to a spotting tractor fifth wheel, one end of a trailer may be selectively elevated for subsequent connection to a tractor by securing said trailer connecting means to the trailer and operating the motor to elevate the fifth wheel and thus the trailer.
Claim 3
Dependent Claim
13 words
The lifting device of claim 1 wherein said extensible member comprises a turnbuckle.
Claim 4
Dependent Claim
60 words
The lifting device of claim 1 in combination with a spotting tractor having said wheeled frame, said fifth wheel thereon and said motor for changing the vertical position of said fifth wheel thereon, said spotting tractor further including a subframe pivotally secured to said frame and mounting said fifth wheel; and bracing means extending from said upright to said subframe.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |