US3653518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized reeving for cranes
Assignee: Alliance Machine Co
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Filing: 1970-01-12
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Granted: 1972-04-04
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Expires: 1990-01-12
Abstract
Abstract A stabilized reeving system is provided for crane loading and unloading wherein the load suspended from the crane may be trimmed or stabilized for tilt or list.
Inventors
- 👤 Karl L Polen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:13
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/04; B66C13/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
A stabilized reeving system for overhead cranes comprising a cable drum mounted for rotation on said crane, at least one pair of cables having one end fixed to said drum and the other ends depending therefrom, a lift beam spaced below said crane, a pair of sheaves spaced on either side of said cable drum on said crane and substantially equidistant from the base line of the depending cables, a pair of spaced apart sheaves on the beam geared together to rotate only in opposite directions, the other ends of said cables passing from the cable drum around one of the sheaves on the beam then around a sheave on the crane and being dead ended on the beam intermediate the axes of the sheaves on the beam and trim actuator means for adjusting the length of the cable acting on one of the cable dead ends and the crane mounted sheaves whereby the beam angle is adjusted.
Claim 2
Dependent Claim
158 words
A stabilized reeving system for overhead cranes comprising a cable drum mounted for rotation on said crane, at least one pair of cables having one end fixed to said drum and the other ends depending therefrom, a lift beam spaced below said crane, a pair of sheaves spaced on either side of said cable drum on said crane and substantially equidistant from the base line of the depending cables, a pair of spaced apart sheaves on the beam geared together to rotate only in opposite directions, the other ends of said cables passing from the cable drum around one of the sheaves on the beam then around a sheave on the crane and being dead ended on the beam intermediate the axes of the sheaves on the beam and trim actuator means for adjusting the length of the cable acting on one of the cable dead ends and the crane mounted sheaves whereby the beam angle is adjusted.
Claim 3
Dependent Claim
28 words
A stabilized reeving system as claimed in claim 1 wherein the trim actuator means is connected between the cable dead ends and the center point of the beam.
Claim 4
Dependent Claim
33 words
A stabilized reeving system as claimed in claim 1 wherein the trim actuator means is mounted on the axes of the crane sheaves to move the sheaves vertically with respect to the crane.
Claim 5
Dependent Claim
35 words
A stabilized reeving system for overhead cranes as claimed in claim 1 wherein the crane sheaves are mounted for movement toward and away from each other and means are provided for simultaneously moving said sheaves.
Claim 6
Dependent Claim
49 words
A stabilized reeving system as claimed in claim 4 wherein the means for simultAneously moving said sheaves in a shaft having opposite threads at its two ends threaded through a carrier for said sheaves whereby rotation of the shaft moves the sheaves simultaneously toward or away from each other.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |