US3589776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal generator
Assignee: Robert Bosch GmbH
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Filing: 1969-06-03
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Granted: 1971-06-29
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Expires: 1989-06-03
Abstract
Abstract A vehicle brake system is provided with mechanism to prevent locking of the vehicle wheels during brake application so that not only will the directional stability of the vehicle be retained but also the braking effort will be more efficient. The wheel-associated signal generators are of the small size and may be directly attached to the vehicle wheels and incorporate freely rotatable inertial masses employing inductive or capacitive elements which allow acceleration and deceleration forces to be detected without the utilization of electrical contacts. The freely rotatable inertial mass is damped in accord and as a function of the rotational speed of the wheel. The spacing between the pulses emitted by the signal generator is detected by a control arrangement which produces a control signal to actuate the pressure control means of the break system if the spacing between adjacent pulses is shorter than a predetermined minimum value.
Inventors
- 👤 Heinz Wehde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:58
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/172; B60T8/171; B60T8/32; B60T8/72; B60T8/74
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
206 words
In a pressure-actuated vehicle brake system of the type including an operator-controlled master cylinder, a vehicle wheel, a wheel cylinder connected to said master cylinder, and pressure control means interposed between said master cylinder and said wheel cylinder for controlling the braking pressure in said wheel cylinder to prevent locking of the associated vehicle wheel, signal generator means for sensing acceleration forces which may be acting upon said vehicle wheel, said signal generator means comprising in combination: a. a housing connected to said vehicle wheel for rotation therewith; b. an inertial mass mounted within said housing for unrestricted rotation any spring restraint) in response to acceleration forces acting upon said vehicle wheel; c. damping means for damping said mass, the damping effect being a function of the relative rotational speed of said mass with respect to the rotational speed of said wheel; d. pickup means fixed to said housing and to said mass for producing a pulse output in response to said relative rotational speed; e. control output producing means, measuring the time intervals between the pulses of said pulse output and producing a control output for actuating said pressure control means, if at least one of said intervals is shorter than a certain minimum time.
Claim 2
Dependent Claim
206 words
In a pressure-actuated vehicle brake system of the type including an operator-controlled master cylinder, a vehicle wheel, a wheel cylinder connected to said master cylinder, and pressure control means interposed between said master cylinder and said wheel cylinder for controlling the braking pressure in said wheel cylinder to prevent locking of the associated vehicle wheel, signal generator means for sensing acceleration forces which may be acting upon said vehicle wheel, said signal generator means comprising in combination: a. a housing connected to said vehicle wheel for rotation therewith; b. an inertial mass mounted within said housing for unrestricted rotation any spring restraint) in response to acceleration forces acting upon said vehicle wheel; c. damping means for damping said mass, the damping effect being a function of the relative rotational speed of said mass with respect to the rotational speed of said wheel; d. pickup means fixed to said housing and to said mass for producing a pulse output in response to said relative rotational speed; e. control output producing means, measuring the time intervals between the pulses of said pulse output and producing a control output for actuating said pressure control means, if at least one of said intervals is shorter than a certain minimum time.
Claim 3
Dependent Claim
18 words
The combination defined in claim 1 whereby said damping effect is substantively proportional to said relative rotational speed.
Claim 4
Dependent Claim
43 words
The combination defined in claim 1 and comprising means for impeding said actuating of said pressure control means until a certain number of pulses of said pulse output has appeared, this number calculating from anew after each actuation of said pressure control means.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |