US3683619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Booster system
Assignee: TDK Micronas GmbH
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Filing: 1971-01-11
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Granted: 1972-08-15
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Expires: 1991-01-11
Abstract
Abstract A pressure master cylinder and a booster device are interconnected by pressure medium lines. The master cylinder includes an actuating piston having internally thereof a pressure medium cylinder and a control piston actuated by a brake pedal. When the brake pedal is depressed the control piston applies pressure to the pressure medium cylinder which in turn actuates the actuating piston. The pressure medium of the pressure medium cylinder actuates the booster device which in turn applies further actuating pressure to the actuating piston. The control piston is constructed so that failure in the booster device or the interconnecting pressure medium lines will enable the control piston to displace the actuating piston by physical contact to apply braking pressure to the one or more braking circuits connected to the master cylinder.
Inventors
- 👤 Juan Belart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:32
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/14; B60T13/142; B60T13/143; B60T13/144
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
164 words
A booster system for brake systems in vehicles comprising: a brake pedal; a pressure master cylinder; a booster device having at least one output; at least one pressure medium line interconnecting said master cylinder and said booster device; and at least one brake circuit coupled to said master cylinder; said master cylinder including an actuating piston having internally thereof a pressure medium cylinder, and a control piston coupled to said brake pedal, said actuating piston having pressure applied thereto by at least said output of said booster device in a given direction and simultaneously said control piston is moved by said brake pedal against the pressure medium of said pressure medium cylinder in said given direction to actuate said brake circuit, the pressure medium of said pressure medium cylinder being coupled by said one pressure medium line for actuation of said booster device, said control piston coming into direct contact with said actuating piston for actuation thereof when at least said booster device fails.
Claim 2
Dependent Claim
164 words
A booster system for brake systems in vehicles comprising: a brake pedal; a pressure master cylinder; a booster device having at least one output; at least one pressure medium line interconnecting said master cylinder and said booster device; and at least one brake circuit coupled to said master cylinder; said master cylinder including an actuating piston having internally thereof a pressure medium cylinder, and a control piston coupled to said brake pedal, said actuating piston having pressure applied thereto by at least said output of said booster device in a given direction and simultaneously said control piston is moved by said brake pedal against the pressure medium of said pressure medium cylinder in said given direction to actuate said brake circuit, the pressure medium of said pressure medium cylinder being coupled by said one pressure medium line for actuation of said booster device, said control piston coming into direct contact with said actuating piston for actuation thereof when at least said booster device fails.
Claim 3
Dependent Claim
23 words
A system according to claim 1, wherein said master cylinder further includes a spring disposed between said control piston and said actuating piston.
Claim 4
Dependent Claim
61 words
A system according to claim 1, wherein said control piston includes a small diameter portion extending into said pressure medium cylinder, a large diameter portion coupled to said brake pedal, and a shoulder interconnecting said small portion and said large portion, said shoulder normally being spaced from said actuating piston, but engaging said actuating piston when at least said booster fails.
Claim 5
Dependent Claim
52 words
A system according to claim 1, further including a first pressure medium supply tank, an annular duct disposed between said actuating piston and the housing of said master cylinder coupled to said supply tank, and a compensating bore in said actuating piston extending between said pressure medium cylinder and said annular duct.
Claim 6
Dependent Claim
151 words
A system according to claim 1, further including a first pressure medium supply tank, a radial port contained in said actuating piston in communication with said pressure medium cylinder and said first supply tank, an axial bore contained in said control piston having one end thereof in communication with said pressure medium cylinder, a radial bore contained in said control piston having one end thereof in communication with the other end of said axial bore, and an annular chamber disposed between said control piston and the housing of said master cylinder in communication with the other end of said radial bore and said one pressure medium line, the closing of said radial port by said control piston enables the pressure medium of said pressure medium cylinder to build up pressure and activate said booster device through said axial bore, said radial bore, said annular chamber and said one pressure medium line.
Claim 7
Dependent Claim
33 words
A system according to claim 1, wherein said pressure applied to said actuating piston from said booster device is also applied in a direction opposite to said given direction to said control piston.
Claim 8
Dependent Claim
70 words
A system according to claim 1, wherein said control piston includes a first portion extending into said pressure medium cylinder, a second portion coupled to said brake pedal and normally spaced from said first portion, and a spring disposed intermediate said first and second portions, said first portion including a flange thereon normally spaced from said actuating piston, but engaging said actuating piston when at least said booster device fails.
Claim 9
Dependent Claim
64 words
A system according to claim 7, further including an axial bore contained in said first portion having one end thereof in communication with said pressure medium cylinder and the other end thereof in communication with said pressure medium cylinder and the other end thereof in communication with said output of said booster device when said first and second portions are separated from each other.
Claim 10
Dependent Claim
59 words
A system according to claim 8, further includes a radial bore contained in said actuating piston having one end thereof in communication with said pressure medium cylinder, and an annular chamber disposed between said actuating piston and the housing of said master cylinder in communication with the other end of said radial bore and said one pressure medium line.
Claim 11
Dependent Claim
30 words
A system according to claim 1, further including a second pressure medium supply tank, and wherein said pressure applied to said actuating piston is supplied by said second supply tank.
Claim 12
Dependent Claim
15 words
A system according to claim 1, wherein said master cylinder is a tandem master cylinder.
Claim 13
Dependent Claim
15 words
A system according to claim 1, wherein said master cylinder is a single-circuit master cylinder.
Claim 14
Dependent Claim
20 words
A system according to claim 1, wherein said pressure medium of said pressure medium cylinder is a hydraulic pressure medium.
Claim 15
Dependent Claim
20 words
A system according to claim 1, wherein said pressure medium of said pressure medium cylinder is a pneumatic pressure medium.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |