Patent US3677360A successfully refreshed from Google Patents.
US3677360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat removal system for brakes
Assignee: United States Department of the Air Force
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Filing: 1971-02-23
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Granted: 1972-07-18
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Expires: 1991-02-23
Abstract
Abstract A braking system for an air cushion landing system having inflatable braking pillows with a fluid provided near the wall adjacent the braking surface which, when evaporated by heat generated at the braking surface, rises and contacts a condenser surface which transfers heat to air passing through the trunk of the air cushion landing system.
Inventors
- 👤 Kennerly H Digges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:33
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/04; B60V1/043
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
114 words
In combination with a vehicle braking system having an expandable tubular member with means to supply air under pressure to said tubular member to engage the braking surfaces to thereby provide braking for the vehicle; a system for increasing the rate of removal of thermal energy from the braking surface of the braking system, comprising: means for supplying a vaporizable liquid to the expandable tubular member whereby the heat energy generated at the friction surface evaporates the liquid so that the vapor rises in the tubular member toward a cooling wall with heat radiating elements thereon whereby the liquid is condensed so that it may be returned to the bottom of the tubular member.
Claim 2
Dependent Claim
114 words
In combination with a vehicle braking system having an expandable tubular member with means to supply air under pressure to said tubular member to engage the braking surfaces to thereby provide braking for the vehicle; a system for increasing the rate of removal of thermal energy from the braking surface of the braking system, comprising: means for supplying a vaporizable liquid to the expandable tubular member whereby the heat energy generated at the friction surface evaporates the liquid so that the vapor rises in the tubular member toward a cooling wall with heat radiating elements thereon whereby the liquid is condensed so that it may be returned to the bottom of the tubular member.
Claim 3
Dependent Claim
148 words
In combination with an air cushion support system for a vehicle having an inflatable bag like trunk device carried by said vehicle with means to supply a flow of air through the inflatable trunk device and braking pillows on the trunk device with means to increase the pressure in the braking pillows above the pressure in the trunk device to thereby provide braking for the vehicle; a system for increasing the rate of removal of thermal energy from the braking surface of the braking pillows, comprising: means for supplying a vaporizable liquid to the pillows whereby the heat energy generated at the friction surface evaporates the liquid so that the vapor rises in the pillows; means including the air flow through said trunk for cooling the top wall of the pillows whereby the liquid is condensed so that it may be returned to the bottom of said pillows.
Claim 4
Dependent Claim
148 words
In combination with an air cushion support system for a vehicle having an inflatable bag like trunk device carried by said vehicle with means to supply a flow of air through the inflatable trunk device and braking pillows on the trunk device with means to increase the pressure in the braking pillows above the pressure in the trunk device to thereby provide braking for the vehicle; a system for increasing the rate of removal of thermal energy from the braking surface of the braking pillows, comprising: means for supplying a vaporizable liquid to the pillows whereby the heat energy generated at the friction surface evaporates the liquid so that the vapor rises in the pillows; means including the air flow through said trunk for cooling the top wall of the pillows whereby the liquid is condensed so that it may be returned to the bottom of said pillows.
Claim 5
Dependent Claim
32 words
The device as recited in claim 2 wherein said means for cooling the top wall of the pillows include radiating elements connected to the top wall and extending into the air flow.
Claim 6
Dependent Claim
33 words
The device as recited in claim 2 including baffles connected to the wall of the pillows adjacent the friction surface whereby the liquid is held in contact with the pillow wall during deceleration.
Claim 7
Dependent Claim
32 words
The device as recited in claim 4 wherein said means for cooling the top wall of the pillows include radiating elements connected to the top wall and extending into the air flow.
Claim 8
Dependent Claim
16 words
The device as recited in claim 5 wherein said vaporizable liquid is a water-ethelene glycol mixture.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |