US3675900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion compensating hoist
Assignee: Jackson Memorial Hospital
•
Filing: 1970-03-16
•
Granted: 1972-07-11
•
Expires: 1990-03-16
Abstract
Abstract A motion compensating hoist for moving a load between relatively vertically movable points, in which a cable from a tensioning hoist is interconnected between the two points, and the cable from a load hoist is connected to the load, and the tensioning hoist and the load hoist are cooperable to establish movement of the load corresponding to the relative movement between the two points and to cause further movement of the load between the two points.
Inventors
- 👤 Charles D Barron
- 👤 Earl A Peterson
- 👤 Gary K Stark
- 👤 Carl A Wilms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:18
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/28; B66D1/40; B66D1/48; B66D2700/00; B66D2700/01; B66D2700/0108; Y; Y10; Y10S; Y10S254/00; Y10S254/90; Y10S254/903
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
134 words
A motion compensating hoist including hoist means for moving a load between relatively vertically movable locations comprising: load hoist means mounted at one of said Locations and having a load line connectable to a load, tensioning hoist means mounted at one of said locations and having a tension line connectable at the other of said locations, a source of power, slip clutch means for connecting said source of power to said hoist means to apply tension to said tension line, motion compensating drive means for connecting said load hoist means to said tensioning hoist means for moving said load line and said tension line synchronously with the relative movement between said locations, and means for superimposing on said synchronous movement further movement of said load line to move said load relative to said locations.
Claim 2
Dependent Claim
134 words
A motion compensating hoist including hoist means for moving a load between relatively vertically movable locations comprising: load hoist means mounted at one of said Locations and having a load line connectable to a load, tensioning hoist means mounted at one of said locations and having a tension line connectable at the other of said locations, a source of power, slip clutch means for connecting said source of power to said hoist means to apply tension to said tension line, motion compensating drive means for connecting said load hoist means to said tensioning hoist means for moving said load line and said tension line synchronously with the relative movement between said locations, and means for superimposing on said synchronous movement further movement of said load line to move said load relative to said locations.
Claim 3
Dependent Claim
44 words
A motion compensating hoist as defined in claim 1, including releasable drive means in said motion compensating drive means, and a separate source of power for said load hoist means operable when said releasable drive means is released to drive said load hoist means.
Claim 4
Dependent Claim
38 words
A motion compensating hoist as defined in claim 2, wherein said separate source of power is also operable when said releasable drive means is engaged to superimpose said further movement of said load line on said synchronous movement.
Claim 5
Dependent Claim
44 words
A motion compensating hoist as defined in claim 1, wherein said slip clutch means is operable by fluid pressure to transmit torque at a value which varies with the applied fluid pressure, and including means for supplying pressure fluid to said slip clutch means.
Claim 6
Dependent Claim
52 words
A motion compensating hoist as defined in claim 4, wherein said means for supplying pressure fluid to said slip clutch means includes tension responsive means operable by said tension line for varying the pressure applied to said fluid pressure operated means to vary the torque transmitting capacity of said slip clutch means.
Claim 7
Dependent Claim
97 words
A motion compensating hoist as defined in claim 4, wherein said means for supplying pressure fluid to said slip clutch means includes tension responsive means operable by said tension line for varying the pressure applied to said fluid pressure operated means to vary the torque transmitting capacity of said slip clutch means, said tension responsive means including a hydraulic load cell operable by said tension line, and pressure controller means connected to said load cell and responsive to changes in load on the latter to vary the pressure of pressure fluid supplied to said slip clutch means.
Claim 8
Dependent Claim
100 words
A motion compensating hoist as defined in claim 4, wherein said means for supplying pressure fluid to said slip clutch means includes means for supplying a selected pressure proportionate to the load to be moved, and means responsive to tension on said tension line to vary the pressure supplied to said slip clutch means, whereby the tension on said tension line remains substantially constant when said load hoist line is supporting said load and said motion compensating drive means connects said tensioning hoist means to said load hoist means and releases said tensioning hoist means from said load hoist means.
Claim 9
Dependent Claim
44 words
A motion compensating hoist as defined in claim 4, wherein said means for supplying pressure fluid to said slip clutch means includes pressure control means for applying pressure to said slip clutch means at a value determined by the tension on said tension line.
Claim 10
Dependent Claim
47 words
A motion compensating hoist as defined in claim 1, wherein said load hoist means includes a drive shaft drivable by said motion compensating drive means, and a drum revolvable about said shaft, and including a separate source of power for driving said drum relative to said shaft.
Claim 11
Dependent Claim
84 words
A motion compensating hoist as defined in claim 1, wherein said load hoist means includes a drive shaft drivable by said motion compensating drive means, a drum revolvable about said shaft, and including a separate source of power for driving said drum relative to said shaft, and releasable means normally connecting said drum to said shaft for rotation as a unit, and means for releasing said releasable means upon operation of said separate source of power to drive sAid drum relative to said shaft.
Claim 12
Dependent Claim
42 words
A motion compensating hoist as defined in claim 1, wherein said load hoist means includes a drive shaft, said motion compensating drive means including a clutch interposed between said tensioning hoist and said shaft, and actuator means for engaging said last-mentioned clutch.
Claim 13
Dependent Claim
60 words
A motion compensating hoist as defined in claim 1, wherein said load hoist means includes a drive shaft, said motion compensating drive means including a clutch interposed between said tensioning hoist and said shaft, actuator means for engaging said last-mentioned clutch, brake means for said shaft, and actuator means for releasing said brake means when said last-mentioned clutch is engaged.
Claim 14
Dependent Claim
86 words
A motion compensating hoist as defined in claim 1, wherein said load hoist means includes a drive shaft drivable by said motion compensating drive means, a drum revolvable about said shaft, and including a motor for driving said drum relative to said shaft, said motion compensating drive means including a clutch interposed between said tensioning hoist and said shaft, actuator means for engaging said last-mentioned clutch means, brake means for said shaft, and actuator means for releasing said brake means when said last-mentioned clutch is engaged.
Claim 15
Dependent Claim
89 words
Drum apparatus for a load line comprising: a drum shaft, a drum revolvably mounted on said shaft for relative rotation, a support fixed on said shaft for rotation therewith, reversible motor means carried by said support and engaged with said drum to rotate the latter in either direction, releasable means carried by said support and engageable with said drum to lock said drum to said shaft, means for driving said motor in either direction and releasing said releasable means, and drive means for rotating said shaft in either direction.
Claim 16
Dependent Claim
89 words
Drum apparatus for a load line comprising: a drum shaft, a drum revolvably mounted on said shaft for relative rotation, a support fixed on said shaft for rotation therewith, reversible motor means carried by said support and engaged with said drum to rotate the latter in either direction, releasable means carried by said support and engageable with said drum to lock said drum to said shaft, means for driving said motor in either direction and releasing said releasable means, and drive means for rotating said shaft in either direction.
Claim 17
Dependent Claim
30 words
Drum apparatus as defined in claim 14, including brake means for said shaft, and means for releasing said brake means when said drive means is operative to rotate said shaft.
Claim 18
Dependent Claim
31 words
Drum apparatus as defined in claim 14, wherein said drive means includes slip clutch means having a pressure responsive actuator for varying the torque transmitting capacity of said slip clutch means.
Claim 19
Dependent Claim
71 words
Drum apparatus as defined in claim 14, wherein said drive means includes another drum and shaft connected for rotation with one another and having a line, releasable means driven by said another drum and shaft and connectable to said shaft of the first-mentioned drum to drive both of said drums in unison, and variable slip clutch means for driving said another drum and shaft to apply tension to the line thereon.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |