Patent US3303473A successfully refreshed from Google Patents.
Patent US3706971A successfully refreshed from Google Patents.
US3706971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake control arrangement
Assignee: Sharp Corp
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Filing: 1970-04-02
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Granted: 1972-12-19
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Expires: 1990-04-02
Abstract
Abstract An antiskid hydraulic brake pressure control system comprising a brake pressure reducing controller including a skid sensor; and a safety circuit said system being characterized by the provision of an pseudo-skid signal generator, said pseudo-signal being similar to a regular one generated in and delivered from said skid sensor, said skid pseudo-signal being fed to said sensor.
Inventors
- 👤 Tosiaki Okamoto
- 👤 Koziro Mori
- 👤 Hayao Yamazaki
- 👤 Takao Abu
- 👤 Takefumi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/88; B60T8/885; B60T8/34; B60T8/42; B60T8/4208; B60T8/4225; B60T8/4241; B60T8/425
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
208 words
An antiskid hydraulic brake pressure control system including an electronic safety device, said safety device comprising: a. pseudo skid signal generator means for generating a pseudo signal similar to a normal skid signal, said pseudo skid signal generator including: 1. pulse generator means for generating a trigger pulse upon the actuation of a first switch; 2. monostable multivibrator means, fired by said pulse generator means, and 3. differentiating means coupled to said monostable multivibrator means for producing said pseudo skid signal which is similar to a normal skid signal wherein said differentiating means is coupled to the output of said wheel deceleration sensing means; b. wheel sensing means for sensing the deceleration of a wheel upon application of a brake associated with the wheel and the wheel acceleration upon the release of the brake, and for generating a normal skid signal; c. wheel skid circuit means for receiving the output of said wheel deceleration sensing means and for generating a signal to control the operation of said control system; d. means for applying said pseudo signal to the input of said wheel skid circuit means; and e. testing means for determining if said control system and said wheel skid circuit means respond properly to said pseudo skid signal.
Claim 2
Dependent Claim
208 words
An antiskid hydraulic brake pressure control system including an electronic safety device, said safety device comprising: a. pseudo skid signal generator means for generating a pseudo signal similar to a normal skid signal, said pseudo skid signal generator including: 1. pulse generator means for generating a trigger pulse upon the actuation of a first switch; 2. monostable multivibrator means, fired by said pulse generator means, and 3. differentiating means coupled to said monostable multivibrator means for producing said pseudo skid signal which is similar to a normal skid signal wherein said differentiating means is coupled to the output of said wheel deceleration sensing means; b. wheel sensing means for sensing the deceleration of a wheel upon application of a brake associated with the wheel and the wheel acceleration upon the release of the brake, and for generating a normal skid signal; c. wheel skid circuit means for receiving the output of said wheel deceleration sensing means and for generating a signal to control the operation of said control system; d. means for applying said pseudo signal to the input of said wheel skid circuit means; and e. testing means for determining if said control system and said wheel skid circuit means respond properly to said pseudo skid signal.
Claim 3
Dependent Claim
10 words
monostable multivibrator means, fired by said pulse generator means, and
Claim 4
Dependent Claim
10 words
monostable multivibrator means, fired by said pulse generator means, and
Claim 5
Dependent Claim
24 words
The apparatus of claim 1 wherein said pseudo skid signal represents vehicle deceleration for a predetermined period of time and then represents vehicle acceleration.
Claim 6
Dependent Claim
43 words
indicator means for producing a signal if said system does not respond to said pseudo skid signal in a first predetermined period of time or if said system responds to said pseudo skid signal for less than a second predetermined period of time.
Claim 7
Dependent Claim
43 words
indicator means for producing a signal if said system does not respond to said pseudo skid signal in a first predetermined period of time or if said system responds to said pseudo skid signal for less than a second predetermined period of time.
Claim 8
Dependent Claim
19 words
relay means, for releasing the brake pressure, said relay means being energized by the output of said trigger means.
Claim 9
Dependent Claim
19 words
relay means, for releasing the brake pressure, said relay means being energized by the output of said trigger means.
Claim 10
Dependent Claim
57 words
The apparatus as set forth in claim 1 wherein: a. said wheel sensing means includes a signal generator means for generating a deceleration signal during brake application and for generating an acceleration signal during the non-application of the brakes, and amplifying means for amplifying said deceleration and acceleration signals; and b. said wheel skid circuit means comprises:
Claim 11
Dependent Claim
141 words
differentiating means coupled to said monostable multivibrator means for producing said pseudo skid signal which is similar to a normal skid signal wherein said differentiating means is coupled to the output of said wheel deceleration sensing means; b. wheel sensing means for sensing the deceleration of a wheel upon application of a brake associated with the wheel and the wheel acceleration upon the release of the brake, and for generating a normal skid signal; c. wheel skid circuit means for receiving the output of said wheel deceleration sensing means and for generating a signal to control the operation of said control system; d. means for applying said pseudo signal to the input of said wheel skid circuit means; and e. testing means for determining if said control system and said wheel skid circuit means respond properly to said pseudo skid signal.
Claim 12
Dependent Claim
141 words
differentiating means coupled to said monostable multivibrator means for producing said pseudo skid signal which is similar to a normal skid signal wherein said differentiating means is coupled to the output of said wheel deceleration sensing means; b. wheel sensing means for sensing the deceleration of a wheel upon application of a brake associated with the wheel and the wheel acceleration upon the release of the brake, and for generating a normal skid signal; c. wheel skid circuit means for receiving the output of said wheel deceleration sensing means and for generating a signal to control the operation of said control system; d. means for applying said pseudo signal to the input of said wheel skid circuit means; and e. testing means for determining if said control system and said wheel skid circuit means respond properly to said pseudo skid signal.
Claim 13
Dependent Claim
39 words
The apparatus as set forth in claim 3 further including circuit means responsive to said wheel acceleration signal for switching said third transistor between its conducting and non-conducting state and thereby controlling the fast discharge of said third capacitor.
Claim 14
Dependent Claim
141 words
An anti-skid hydraulic brake pressure control system including an electronic safety device, said safety device comprising: a. pseudo skid signal generator means for generating a pseudo signal similar to a normal skid signal; b. wheel sensing means for sensing the deceleration of a wheel upon application of a brake associated with the wheel and the wheel acceleration upon the release of the brake, and for generating a normal skid signal; c. wheel skid circuit means for receiving the output of said wheel deceleration sensing means and for generating a signal to control the operation of said control system; d. means for applying said pseudo signal to the input of said wheel skid circuit means; and e. testing means for determining if said control system and said wheel skid circuit means respond properly to said pseudo skid signal said testing means including:
Claim 15
Dependent Claim
141 words
An anti-skid hydraulic brake pressure control system including an electronic safety device, said safety device comprising: a. pseudo skid signal generator means for generating a pseudo signal similar to a normal skid signal; b. wheel sensing means for sensing the deceleration of a wheel upon application of a brake associated with the wheel and the wheel acceleration upon the release of the brake, and for generating a normal skid signal; c. wheel skid circuit means for receiving the output of said wheel deceleration sensing means and for generating a signal to control the operation of said control system; d. means for applying said pseudo signal to the input of said wheel skid circuit means; and e. testing means for determining if said control system and said wheel skid circuit means respond properly to said pseudo skid signal said testing means including:
Claim 16
Dependent Claim
111 words
The apparatus as set forth in claim 5 wherein said measuring means includes: a. a pressure reducing period circuit comprising a first transistor and a first capacitor, said first capacitor charging in response to said pseudo signal, wherein said first transistor is switched between its conducting and non-conducting states in response to the charge on said first capacitor; b. a detecting circuit comprising a switch which is switched in response to the action of said system; and c. comparator means for comparing the conducting state of said first transistor and the state of said switch whereby the output of said comparator circuit produces an indication of the performance of said system.
Claim 17
Dependent Claim
30 words
The apparatus as set forth in claim 5 wherein said indicator means includes means for disabling said system if said system does not respond properly to said pseudo skid signal.
Claim 18
Dependent Claim
50 words
The apparatus as set forth in claim 6 wherein said measuring means further includes a second transistor and a second capacitor coupled to said comparator, said capacitor being charged in response to the output of said comparator means, wherein said second transistor becomes conductive when said second capacitor becomes charged.
References Cited (Backward Citations)
US3275384A
Cited
US3516715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |