US3889819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overhead ropeway crab for conveying loads
Assignee: Individual
•
Filing: 1973-11-15
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Granted: 1975-06-17
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Expires: 1993-11-15
Abstract
Abstract An overhead ropeway crab assembly uses a fixed guide cable and a endless cable moving adjacent the guide cable. A crab is selectively coupled to one cable or the other by clamping jaws. The endless cable includes a connector from which the crab is spaced and a line extends from the connector through the crab and includes a hook or the like for engaging a load. The line is lowered or raised by adjusting the position of the crab.
Inventors
- 👤 Josef Koller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:31
CPC Classifications
B; B66; B66C; B66C21/00; B66C2700/00; B66C2700/01; B66C2700/011
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
182 words
Load hauling apparatus comprising a substantially stationary cable, a displaceable cable separate from and displaceable along said stationary cable, a crab, coupling means to clamp said crab selectively to said stationary cable or to said displaceable cable whereby said crab is affixed to said cable or displaceable with said displaceable cable, a load lifter displaceable with the displaceable cable and extending through said crab by an amount corresponding to relative displacement between the crab and load lifter, the displaceable cable including ends, further means connecting said ends and thereby connecting the displaceable cable in a loop, means slidably supporting said further means on said stationary cable and preventing twisting of said cables, the load lifter extending through said crab and including an end connected to said further means, said further means holding the said end of the load lifter in spaced relation relative to the ends of the displaceable cable to promote the avoiding of engagement between the load lifter and displaceable cable, said load lifter including a free end, and load engaging means on the free end of the load lifter.
Claim 2
Dependent Claim
182 words
Load hauling apparatus comprising a substantially stationary cable, a displaceable cable separate from and displaceable along said stationary cable, a crab, coupling means to clamp said crab selectively to said stationary cable or to said displaceable cable whereby said crab is affixed to said cable or displaceable with said displaceable cable, a load lifter displaceable with the displaceable cable and extending through said crab by an amount corresponding to relative displacement between the crab and load lifter, the displaceable cable including ends, further means connecting said ends and thereby connecting the displaceable cable in a loop, means slidably supporting said further means on said stationary cable and preventing twisting of said cables, the load lifter extending through said crab and including an end connected to said further means, said further means holding the said end of the load lifter in spaced relation relative to the ends of the displaceable cable to promote the avoiding of engagement between the load lifter and displaceable cable, said load lifter including a free end, and load engaging means on the free end of the load lifter.
Claim 3
Dependent Claim
14 words
Apparatus as claimed in claim 1 wherein said further means is a rigid bar.
Claim 4
Dependent Claim
17 words
Apparatus as claimed in claim 2 wherein the means slidably supporting said further means is a pulley.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |