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US3589481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake system
Assignee: FRAN STEF Corp A CORP OF NY
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Filing: 1969-06-05
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Granted: 1971-06-29
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Expires: 1989-06-05
Abstract
Abstract An internal chamber is filled with pressure fluid. A plunger has a head which is reciprocable in the chamber towards and away from a wall portion thereof. Two bellows members are telescoped inside each other and define an inner space and a discrete outer annular space surrounding the inner space. One end portion of each of the bellows members is fluid-tightly connected to the plunger and the other fluid-tightly to the aforementioned wall portion. Conduit means leading to the wheel to be braked is provided in form of two conduits one of which communicates with the inner space and the other of which communicates with the outer annular space. Both spaces are filled with fluid. When the plunger is reciprocated towards the wall portion, the fluid is compressed and ejected into the conduit means for activating the brake or brakes associated with the conduit means and with the wheel or wheels which are to be braked.
Inventors
- 👤 Alfons Motsch
- 👤 Gerhard Mohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:20
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/46; B60T13/52; B60T13/565; B60T11/00; B60T11/10; B60T11/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
A brake system, particularly for automotive vehicles, comprising wall means defining a pressure-tight internal chamber; plunger means movable in said chamber toward and away from a wall portion bounding said chamber; a pair of elastically axially compressible tubular members telescoped together and defining an inner space and a discrete annular outer space surrounding said inner space, said tubular members consisting of fluidtight material and each having opposite ends which are respectively fluid-tightly connected to said plunger means and said wall portion; a body of pressure fluid accommodated in each of said spaces; an additional body of pressure fluid accommodated in said chamber; separate conduits connected to said wall portion and communicating therethrough with the respective inner and outer spaces; and actuating means operative for pressurizing said additional body of pressure fluid to thereby displace said plunger means through the intermediary of the pressurized additional body of pressure fluid in said chamber towards said wall portion so as to effect simultaneous axial compression of said tubular members and concomitant simultaneous pressurization of the bodies of pressure fluid in said spaces.
Claim 2
Dependent Claim
179 words
A brake system, particularly for automotive vehicles, comprising wall means defining a pressure-tight internal chamber; plunger means movable in said chamber toward and away from a wall portion bounding said chamber; a pair of elastically axially compressible tubular members telescoped together and defining an inner space and a discrete annular outer space surrounding said inner space, said tubular members consisting of fluidtight material and each having opposite ends which are respectively fluid-tightly connected to said plunger means and said wall portion; a body of pressure fluid accommodated in each of said spaces; an additional body of pressure fluid accommodated in said chamber; separate conduits connected to said wall portion and communicating therethrough with the respective inner and outer spaces; and actuating means operative for pressurizing said additional body of pressure fluid to thereby displace said plunger means through the intermediary of the pressurized additional body of pressure fluid in said chamber towards said wall portion so as to effect simultaneous axial compression of said tubular members and concomitant simultaneous pressurization of the bodies of pressure fluid in said spaces.
Claim 3
Dependent Claim
65 words
A brake system as defined in claim 1, said chamber having an inlet; and said actuating means comprising a fluid-filled bellows member located exteriorly of said chamber and having one end portion fluid-tightly and coaxially connected to said inlet thereof, and a reciprocable member fluid-tightly connected with the other end portion of said bellows member and reciprocable in direction towards and away from said inlet.
Claim 4
Dependent Claim
47 words
A brake system as defined in claim 1, and further comprising at least one user device associated with said conduit means and with a wheel to be braked for effecting braking of the wheel in response to pressurization of said bodies of pressure fluid in said space.
Claim 5
Dependent Claim
138 words
A brake system as defined in claim 3, said user device comprising a pressure chamber having two spaced opposite walls, a plunger member in said pressure chamber and having a head and a shaft extending through an aperture in one of said walls to the exterior of said pressure chamber, a friction member carried by said shaft exteriorly of said chamber, a pair of axially elastically compressible fluid-tight tubular elements one of which surrounds said shaft intermediate said head and said one wall outwardly of said aperture and being fluid-tightly connected to both, and the other of which is located intermediate said head and the other wall fluid-tightly connected to both; and wherein said separate conduits respectively communicate with said pressure chamber exteriorly of both of said tubular elements and with the interior of said other tubular element.
Claim 6
Dependent Claim
18 words
A brake system as defined in claim 4, wherein said tubular members and said tubular elements are bellows-shaped.
Claim 7
Dependent Claim
27 words
A brake system as defined in claim 4; further comprising an annular ball bearing installed in said aperture, and said shaft extending slidably through said ball bearing.
Claim 8
Dependent Claim
24 words
A brake system as defined in claim 4, said actuating means further comprising an actuating pedal for depressing by a foot of an operator.
Claim 9
Dependent Claim
35 words
A brake system as defined in claim 7; and further comprising feedback means associated with said actuating pedal and operative for feeding back to said pedal pressures indicative of the operation of said brake system.
Claim 10
Dependent Claim
121 words
A brake system as defined in claim 8, said feedback means comprising a pair of fluid-tight pressure-fluid containing compartments, a reciprocable member received in each of said compartments and having a head and a stem portion extending through an aperture in a wall to the exterior of the respective compartment, connecting means articulately connecting each such stem portion with said pedal, a bellows member surrounding each reciprocable member in the respective compartment intermediate said head and said aperture radially outwardly of the latter and being fluid-tightly connected to the respective head and wall, and a pair of feedback conduits each connected with one of said separate conduits and each communicating with one of said compartments exteriorly of the respective bellows member.
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 |