Patent US3920282A successfully refreshed from Google Patents.
US3920282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft automatic braking system
Assignee: Boeing Co
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Filing: 1974-06-07
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Granted: 1975-11-18
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Expires: 1994-06-07
Abstract
Abstract An aircraft automatic braking system utilizing the forward wheels of an aircraft landing gear truck for generating signals representative of wheelspeed for utilization in wheelspeed spinup detector circuits in the system while utilizing the rear wheels of the aircraft landing gear truck for generating signals representative of deceleration further compared with selected deceleration to adjust system pressure. To compensate for varying runway conditions, the velocities of a plurality of rear wheels are averaged in providing the signals representative of deceleration.
Inventors
- 👤 Garrett H Devlieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:47
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/32; B64C25/42; B64C25/426; B60; B60T; B60T8/00; B60T8/17; B60T8/1701; B60T8/1703; B60T8/32; B60T8/321; B60T8/325
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
An aircraft automatic braking system comprising in combination: means for generating a brake pressure control signal; automatic braking pressure modulating valve means responsive to said brake pressure control signal for metering automatic braking pressure to first shuttle valve means for application to the brakes on one side of the aircraft and second shuttle valve means for application to the brakes on the other side of the aircraft; first manually controlled pressure metering valve means coupled to said first shuttle valve means and second manually controlled pressure metering valve means coupled to said second shuttle valve means, each of said first and second shuttle valve means arranged for transmitting the greater of manually or automatically controlled pressures for application to the brakes on the respective sides of the aircraft; and shutoff valve means for transmitting hydraulic power to said automatic braking pressure modulating valve means in response to an aircraft operating parameter.
Claim 2
Dependent Claim
151 words
An aircraft automatic braking system comprising in combination: means for generating a brake pressure control signal; automatic braking pressure modulating valve means responsive to said brake pressure control signal for metering automatic braking pressure to first shuttle valve means for application to the brakes on one side of the aircraft and second shuttle valve means for application to the brakes on the other side of the aircraft; first manually controlled pressure metering valve means coupled to said first shuttle valve means and second manually controlled pressure metering valve means coupled to said second shuttle valve means, each of said first and second shuttle valve means arranged for transmitting the greater of manually or automatically controlled pressures for application to the brakes on the respective sides of the aircraft; and shutoff valve means for transmitting hydraulic power to said automatic braking pressure modulating valve means in response to an aircraft operating parameter.
Claim 3
Dependent Claim
28 words
The combination according to claim 1 further including hydraulic fluid restrictor means disposed in the hydraulic portion of said system for restricting the release of automatic braking pressure.
Claim 4
Dependent Claim
129 words
An aircraft automatic braking system comprising in combination: means for generating a brake pressure control signal; automatic braking pressure modulating valve means responsive to said brake pressure control signal for metering automatic braking pressure to first shuttle valve means for application to the brakes on one side of the aircraft and second shuttle valve means for application to the brakes on the other side of the aircraft; and first manually controlled pressure metering valve means coupled to said first shuttle valve means and second manually controlled pressure metering valve means coupled to said second shuttle valve means, each of said first and second shuttle valve means arranged for transmitting the greater of manually or automatically controlled pressures for application to the brakes on the respective sides of the aircraft.
Claim 5
Dependent Claim
129 words
An aircraft automatic braking system comprising in combination: means for generating a brake pressure control signal; automatic braking pressure modulating valve means responsive to said brake pressure control signal for metering automatic braking pressure to first shuttle valve means for application to the brakes on one side of the aircraft and second shuttle valve means for application to the brakes on the other side of the aircraft; and first manually controlled pressure metering valve means coupled to said first shuttle valve means and second manually controlled pressure metering valve means coupled to said second shuttle valve means, each of said first and second shuttle valve means arranged for transmitting the greater of manually or automatically controlled pressures for application to the brakes on the respective sides of the aircraft.
Claim 6
Dependent Claim
28 words
The combination according to claim 3 further including hydraulic fluid restrictor means disposed in the hydraulic portion of said system for restricting the release of automatic braking pressure.
Claim 7
Dependent Claim
136 words
An aircraft automatic braking system comprising in combination: means for generating a brake pressure control signal; automatic braking pressure modulating valve means responsive to said brake pressure control signal for metering automatic braking pressure to first shuttle valve means for application to the brakes on one side of the aircraft and second shuttle valve means for application to the brakes on the other side of the aircraft; first manually controlled pressure metering valve means coupled to said first shuttle valve means and second manually controlled pressure metering valve means coupled to said second shuttle valve means; and a plurality of first and second anti-skid valves coupled to the respective outputs of said first and second shuttle valve means, said anti-skid valves providing for release of brake pressures in the event of skid control of said aircraft.
Claim 8
Dependent Claim
136 words
An aircraft automatic braking system comprising in combination: means for generating a brake pressure control signal; automatic braking pressure modulating valve means responsive to said brake pressure control signal for metering automatic braking pressure to first shuttle valve means for application to the brakes on one side of the aircraft and second shuttle valve means for application to the brakes on the other side of the aircraft; first manually controlled pressure metering valve means coupled to said first shuttle valve means and second manually controlled pressure metering valve means coupled to said second shuttle valve means; and a plurality of first and second anti-skid valves coupled to the respective outputs of said first and second shuttle valve means, said anti-skid valves providing for release of brake pressures in the event of skid control of said aircraft.
Claim 9
Dependent Claim
34 words
The combination according to claim 5 further including shutoff valve means for controlling the transmission of automatic braking pressure to said first and second shuttle valve means in response to an aircraft operating parameter.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |