Patent US3877755A successfully refreshed from Google Patents.
US3877755A
Expired / Lapsed
US
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Latching gate for adaptive braking system
Assignee: Bendix Corp
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Filing: 1972-07-14
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Granted: 1975-04-15
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Expires: 1992-07-14
Abstract
Abstract In an adaptive braking system for trucks, automobiles and the like a latching gate is provided to block a control channel generated control signal from activating a brake pressure modulator until there is present simultaneously at the gate input a signal indicating that a control wheel is exceeding a first deceleration reference level and that the deceleration history of the control wheel as compared to wheel rotational velocity has satisfied proper criteria.
Inventors
- 👤 Ralph W Carp
- 👤 Frederick O Miesterfeld
- 👤 George B Hickner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:27
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/58; B60T8/17; B60T8/176; B60T8/1763; B60T8/17633
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
141 words
In a wheeled vehicle having a wheel braking system whereby said vehicle wheels are braked by a braking force, an adaptive braking system control channel comprising: means for generating a first electrical signal correlated to the speed of at least one vehicle wheel; means for generating a second electrical signal correlated to the acceleration of at least one vehicle wheel; means for generating a reference electrical signal level corresponding to negative acceleration of a vehicle wheel; means for generating a third electrical signal while said second signal exceeds said reference level; means triggered by said third signal and responsive to subsequent changes in said first and second signals for generating an output signal; means responsive to an error signal for reducing said braking force; and, means for generating said error signal while said output signal and said third signal are generated.
Claim 2
Dependent Claim
141 words
In a wheeled vehicle having a wheel braking system whereby said vehicle wheels are braked by a braking force, an adaptive braking system control channel comprising: means for generating a first electrical signal correlated to the speed of at least one vehicle wheel; means for generating a second electrical signal correlated to the acceleration of at least one vehicle wheel; means for generating a reference electrical signal level corresponding to negative acceleration of a vehicle wheel; means for generating a third electrical signal while said second signal exceeds said reference level; means triggered by said third signal and responsive to subsequent changes in said first and second signals for generating an output signal; means responsive to an error signal for reducing said braking force; and, means for generating said error signal while said output signal and said third signal are generated.
Claim 3
Dependent Claim
45 words
An adaptive braking system control channel as recited in claim 1 wherein said means for generating a reference electrical signal level includes means responsive to said error signal for varying said reference electrical signal level in a direction corresponding to a more positive wheel acceleration.
Claim 4
Dependent Claim
68 words
An adaptive braking system as recited in claim 2 wherein said means for generating a reference electrical signal level comprises a source of voltage and a voltage dividing network connected thereacross, said means for varying said reference electrical signal level comprising means responsive to said error signal for varying the voltage division characteristics of said voltage dividing network, said reference signal being tapped from said voltage dividing network.
Claim 5
Dependent Claim
56 words
An adaptive braking system as recited in claim 3 wherein said means for varying the voltage division characteristics of said voltage dividing network comprises an electrical network shunting at least a portion of said voltage dividing network and including semiconductor means biased from a first conductive state to a second conductive state by said error signal.
References Cited (Backward Citations)
US3275384A
Cited
US3556610A
Cited
US3494671A
Cited
US3524685A
Cited
US3578819A
Cited
US3574417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |