Patent US3220511A successfully refreshed from Google Patents.
US3220511A
Expired / Lapsed
US
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Liquid-cooled descent control device
Assignee: HIMMELRICH LH
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Filing: 1963-05-31
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Granted: 1965-11-30
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Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
- 👤 Edgar E Holkesvick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:32
CPC Classifications
A; A62; A62B; A62B1/00; A62B1/06; B; B64; B64D; B64D17/00; B64D17/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A DESCENT CONTROL DEVICE FOR FRICTIONAL SLIDING ENGAGEMENT WITH A LENGTH OF ROPE, COMPRISING: A BODY MEMBER OF HEAT-CONDUCTING MATERIAL HAVING AN ELONGATED SHAFT PORTION WITH AN OUTER SURFACE OF A LENGTH TO RECEIVE VARYING TURNS OF ROPE THEREABOUT; A HUB PORTION ADJACENT EACH END OF THE SHAFT PORTION; AT LEAST ONE GENERALLY AXIALLY EXTENDING PASSAGEWAY WITH AN INNER SURFACE IN EACH HUB PORTION, SAID PASSAGEWAY BEING OF A SIZE TO SLIDABLY RECEIVE THE LENGTH OF ROPE; ATTACHMENT MEANS CONNECTED TO THE BODY MEMBER; CONTAINER MEANS FOR RECEIVING A BODY OF FLUID HAVING A PREDETERMINED VAPORIZATION TEMPERATURE POSITIONED IN HEAT-RECEIVING RELATIONSHIP WITH SAID BODY MEMBER TO RECEIVE THEREFROM HEAT PRODUCED THEREIN BY THE SLIDING FRICTIONAL ENGAGEMENT OF A ROPE WITH THE BODY MEMBER; AND MEANS IN COMMUNICATION WITH THE INTERIOR OF THE CONTAINER MEANS FOR VENTING TO THE ATMOSPHERE ANY VAPOR PRODUCED FROM SAID FLUID BY THE HEAT OF FRICTION GENERATED IN THE BODY MEMBER BY THE SLIDING ROPE.
Claim 2
Dependent Claim
159 words
A DESCENT CONTROL DEVICE FOR FRICTIONAL SLIDING ENGAGEMENT WITH A LENGTH OF ROPE, COMPRISING: A BODY MEMBER OF HEAT-CONDUCTING MATERIAL HAVING AN ELONGATED SHAFT PORTION WITH AN OUTER SURFACE OF A LENGTH TO RECEIVE VARYING TURNS OF ROPE THEREABOUT; A HUB PORTION ADJACENT EACH END OF THE SHAFT PORTION; AT LEAST ONE GENERALLY AXIALLY EXTENDING PASSAGEWAY WITH AN INNER SURFACE IN EACH HUB PORTION, SAID PASSAGEWAY BEING OF A SIZE TO SLIDABLY RECEIVE THE LENGTH OF ROPE; ATTACHMENT MEANS CONNECTED TO THE BODY MEMBER; CONTAINER MEANS FOR RECEIVING A BODY OF FLUID HAVING A PREDETERMINED VAPORIZATION TEMPERATURE POSITIONED IN HEAT-RECEIVING RELATIONSHIP WITH SAID BODY MEMBER TO RECEIVE THEREFROM HEAT PRODUCED THEREIN BY THE SLIDING FRICTIONAL ENGAGEMENT OF A ROPE WITH THE BODY MEMBER; AND MEANS IN COMMUNICATION WITH THE INTERIOR OF THE CONTAINER MEANS FOR VENTING TO THE ATMOSPHERE ANY VAPOR PRODUCED FROM SAID FLUID BY THE HEAT OF FRICTION GENERATED IN THE BODY MEMBER BY THE SLIDING ROPE.
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |