US3744837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe sling
Assignee: CRC Evans Pipeline International Inc
•
Filing: 1971-03-26
•
Granted: 1973-07-10
•
Expires: 1991-03-26
Abstract
Abstract A load supporting sling or cradle including an elongated support element with a plurality of load-engaging members mounted on the support element in preselected positions and adapted to be in rolling engagement of the load.
Inventors
- 👤 R Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:47
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/12; B66C1/122
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
A pipe sling, comprising a first continuous flexible connector, a plurality of pipe supporting members mounted on said connector, said members being rotatable about an axis parallel to said connector, means for securing said members in preselected positions along said connectors, the exterior of said members being resilient for engaging the exterior of pipe without damaging the pipe, said connector including two supporting lengths on each of which a plurality of pipe supporting members are rotationally mounted, a second flexible connector having two supporting lengths on each of which a plurality of pipe supporting members are rotationally mounted whereby the load supported by said sling is divided between the four supporting lengths of said connections, and means for engaging the ends of said first and second flexible connectors whereby said supporting lengths all coact in the lifting of pipe when said engaging means is lifted.
Claim 2
Dependent Claim
145 words
A pipe sling, comprising a first continuous flexible connector, a plurality of pipe supporting members mounted on said connector, said members being rotatable about an axis parallel to said connector, means for securing said members in preselected positions along said connectors, the exterior of said members being resilient for engaging the exterior of pipe without damaging the pipe, said connector including two supporting lengths on each of which a plurality of pipe supporting members are rotationally mounted, a second flexible connector having two supporting lengths on each of which a plurality of pipe supporting members are rotationally mounted whereby the load supported by said sling is divided between the four supporting lengths of said connections, and means for engaging the ends of said first and second flexible connectors whereby said supporting lengths all coact in the lifting of pipe when said engaging means is lifted.
Claim 3
Dependent Claim
34 words
A pipe sling according to claim 1 wherein said pipe supporting members are rollers and include, a tubular mandrel, a rim surrounding said mandrel, and bearing means rotatively mounting said rim on said mandrel.
Claim 4
Dependent Claim
20 words
A pipe sling according to claim 1 wherein, said pipe supporting members include a resilient outer surface for engaging pipes.
References Cited (Backward Citations)
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US2215460A
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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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |