Patent US3863973A successfully refreshed from Google Patents.
US3863973A
Expired / Lapsed
US
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Pole trailer lifting attachment
Assignee: Individual
•
Filing: 1973-10-19
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Granted: 1975-02-04
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Expires: 1993-10-19
Abstract
Abstract An attachment for a pole trailer for facilitating loading of the trailer on the bed of a truck which includes a length of wire rope bent to a U-shape and maintained so by a bridging piece connecting its free ends. The rope is secured to the pole trailer by means of clamps which engages the rope bight and maintains the rope in a normal upright position with the bridging piece extending above the bunk. Inherent springiness of the rope enables the latter to deflect to a position below the bunk when the pole trailer is loaded and to return to its normal position when the trailer is unloaded.
Inventors
- 👤 Dennis Roger Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:43
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/40; B66; B66C; B66C1/00; B66C1/10; B66C1/12; B66C1/20; Y; Y10; Y10S; Y10S294/00; Y10S294/904
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
138 words
A lifting attaChment for pole trailers having a transverse load bearing bunk including: a. a length of springy wire rope bent into a U-shape configuration so as to have a bight and straight parallel legs, b. an elongated rigid bridging piece rigidly connected at its ends to the free ends of the legs, for restraining the length of rope in said U-shaped configuration, c. means engageable with the rope bight for securing the rope to the trailer near the center of gravity of the latter, and below the bunk, in a normal upright position with the bridging piece uppermost, d. length of the legs being such that the bridging piece extends above the trailer bunk when the rope is in its normal upright position so as to enable the bridging piece to be engaged by a lifting device.
Claim 2
Dependent Claim
138 words
A lifting attaChment for pole trailers having a transverse load bearing bunk including: a. a length of springy wire rope bent into a U-shape configuration so as to have a bight and straight parallel legs, b. an elongated rigid bridging piece rigidly connected at its ends to the free ends of the legs, for restraining the length of rope in said U-shaped configuration, c. means engageable with the rope bight for securing the rope to the trailer near the center of gravity of the latter, and below the bunk, in a normal upright position with the bridging piece uppermost, d. length of the legs being such that the bridging piece extends above the trailer bunk when the rope is in its normal upright position so as to enable the bridging piece to be engaged by a lifting device.
Claim 3
Dependent Claim
33 words
A lifting attachment as claimed in claim 1 in which the bridging piece has elongated sleeves at opposite ends for fitted receiving ends of the wire rope, the sleeves terminating in tapered sockets.
Claim 4
Dependent Claim
86 words
A lifting attachment as claimed in claim 1 in which the means for attaching the rope to the trailer includes: a. an attachment plate secured in a fore and aft position to the bunk and the pole of the pole trailer, the attachment plate having a saddle-shaped upper edge for fittedly seating the rope bight, b. longitudinally spaced clamps secured to the attachment plate and engageable with the rope bight for drawing the rope into frictional engagement with the saddle shaped upper edge of the plate.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |