US3610703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for delaying effective control of vehicle braking by an adaptive braking system until certain wheel velocity conditions have been satisfied
Assignee: Bendix Corp
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Filing: 1969-10-20
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Granted: 1971-10-05
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Expires: 1989-10-20
Abstract
Abstract Means for delaying effective control of vehicle braking by the control channel of an adaptive braking system includes a memory which is activated when a controlling vehicle wheel after being manually braked attains a certain deceleration. At that time a first signal proportional to a percentage of instantaneous wheel speed is memorized and thereafter continually compared to a second signal proportional to actual wheel speed. If within a predetermined time period the second signal drops to the level of the first signal an output is generated which latches open a gate to allow the control channel error signal to proceed to a brake pressure modulator to thereby control vehicle braking.
Inventors
- 👤 Michael Slavin
- 👤 Ralph W Carp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:43
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1764; B60T8/32; B60T8/58
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
125 words
In an antiskid system for wheeled vehicles having at least one control channel for controlling braking of at least one wheel in response to dynamic conditions of at least one wheel and including first means for reducing braking force on a vehicle wheel in response to said dynamic conditions achieving a predetermined threshold, means for delaying the response of said first means comprising: means for generating a first signal proportional to wheel velocity; means responsive to said dynamic conditions achieving said predetermined threshold for generating a memorization signal; means responsive to said memorization signal for Memorizing a predetermined percentage portion of said first signal; and, means comparing said memorized portion with said first signal for allowing said first means to respond to said dynamic conditions.
Claim 2
Dependent Claim
125 words
In an antiskid system for wheeled vehicles having at least one control channel for controlling braking of at least one wheel in response to dynamic conditions of at least one wheel and including first means for reducing braking force on a vehicle wheel in response to said dynamic conditions achieving a predetermined threshold, means for delaying the response of said first means comprising: means for generating a first signal proportional to wheel velocity; means responsive to said dynamic conditions achieving said predetermined threshold for generating a memorization signal; means responsive to said memorization signal for Memorizing a predetermined percentage portion of said first signal; and, means comparing said memorized portion with said first signal for allowing said first means to respond to said dynamic conditions.
Claim 3
Dependent Claim
17 words
An antiskid system as recited in claim 1 wherein said memorization signal generating means comprises a one-shot.
Claim 4
Dependent Claim
126 words
An antiskid system as recited in claim 1 wherein said means for generating a first signal comprises electrical means for generating a first electrical signal proportional to wheel velocity, said first electrical signal being referred to a first voltage level and said memorizing means and said comparing means include: charge storage means having first and second ports, said first port being connected to receive said first electrical signal; means for attenuating said first electrical signal; normally conductive means for applying said attenuated first electrical signal to said second port when conductive and responsive to said memorization signal for becoming nonconductive; means for monitoring voltage across said charge storage means; and, means responsive to said voltage for allowing said first means to respond to said dynamic conditions.
Claim 5
Dependent Claim
53 words
An antiskid system as recited in claim 3, wherein said charge storage means comprises a capacitor and said normally conductive means comprises a transistor normally biased conductive and having its collector-emitter circuit connected to apply said attenuated first electrical signal to said second port, said transistor being biased nonconductive by said memorization signal.
Claim 6
Dependent Claim
65 words
An antiskid system as recited in claim 3, wherein said means for monitoring such charge storage voltage comprises a field effect transistor having a gate electrode connected to said first port, and a drain-source circuit; and, means for biasing said field effect transistor so as to effect an electrical change in said drain-source circuit when said gate electrode passes through a first predetermined voltage level.
Claim 7
Dependent Claim
16 words
An antiskid system as recited in claim 5, wherein said attenuating means comprises a voltage divider.
Claim 8
Dependent Claim
18 words
An antiskid system as recited in claim 5, wherein said attenuating means comprises a fixed resistor voltage divider.
Claim 9
Dependent Claim
145 words
In an antiskid system for wheeled vehicles having at least one control channel for controlling braking of at least one wheel in response to dynamic conditions of at least one wheel, means for delaying control of said at least one wheel by said at least one control channel comprising: means for generating a first signal proportional to wheel velocity; means responsive to a dynamic condition of said at least one wheel for generating a memorization signal; and, means responsive to said memorization signal for memorizing the instantaneous value of said first signal and thereafter comparing said memorized signal with said first signal, and for generating a control signal upon said first signal attaining a value which is a predetermined percentage of said memorized signal; and, means responsive to said control signal for releasing braking force from a vehicle wheel whereby said vehicle braking is controlled.
Claim 10
Dependent Claim
145 words
In an antiskid system for wheeled vehicles having at least one control channel for controlling braking of at least one wheel in response to dynamic conditions of at least one wheel, means for delaying control of said at least one wheel by said at least one control channel comprising: means for generating a first signal proportional to wheel velocity; means responsive to a dynamic condition of said at least one wheel for generating a memorization signal; and, means responsive to said memorization signal for memorizing the instantaneous value of said first signal and thereafter comparing said memorized signal with said first signal, and for generating a control signal upon said first signal attaining a value which is a predetermined percentage of said memorized signal; and, means responsive to said control signal for releasing braking force from a vehicle wheel whereby said vehicle braking is controlled.
Claim 11
Dependent Claim
111 words
An antiskid system for wheeled vehicles having a braking system for applying braking force to at least a vehicle wheel, said antiskid system comprising: first means for generating a first signal when the rotational deceleration of a vehicle wheel exceeds a predetermined threshold; second means for generating a second signal proportional to velocity of a vehicle wheel; third means responsive to said first signal for reducing braking force on said vehicle wheel; and, means for delaying response of said third means to said first signal until the instantaneous value of said second signal has decreased by a predetermined percentage of said second signal at the time said first signal was generated.
Claim 12
Dependent Claim
111 words
An antiskid system for wheeled vehicles having a braking system for applying braking force to at least a vehicle wheel, said antiskid system comprising: first means for generating a first signal when the rotational deceleration of a vehicle wheel exceeds a predetermined threshold; second means for generating a second signal proportional to velocity of a vehicle wheel; third means responsive to said first signal for reducing braking force on said vehicle wheel; and, means for delaying response of said third means to said first signal until the instantaneous value of said second signal has decreased by a predetermined percentage of said second signal at the time said first signal was generated.
Claim 13
Dependent Claim
74 words
An antiskid system as recited in claim 9 wherein said means for delaying comprises: means responsive to said first Signal for memorizing a predetermined percentage of said second signal; means comparing the memorized signal with subsequently generated instantaneous values of said second signal for generating a control signal upon said subsequently generated second signal attaining the value of the memorized signal, said third means being responsive to said control signal for reducing braking force.
Claim 14
Dependent Claim
80 words
An antiskid system as recited in claim 9 wherein said means for delaying comprises means comparing the value of said second signal at the time said first signal is initially generated with said second signal subsequently generated for generating a control signal upon said second signal attaining a predetermined percentage of the second signal at the time said first signal was initially generated, said third means being responsive to said control signal for reducing braking force on said vehicle wheel.
Claim 15
Dependent Claim
29 words
An antiskid system as recited in claim 11 with additionally timing means for enabling said comparing means for only a predetermined time period after said first signal is generated.
Claim 16
Dependent Claim
44 words
An antiskid system as recited in claim 11 wherein said third means comprises: means responsive to said first signal for reducing said braking force; and, gate means opened by said control signal for passing said first signal to said means for reducing braking force.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |