US3909074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake force distributor
Assignee: TDK Micronas GmbH
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Filing: 1974-09-09
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Granted: 1975-09-30
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Expires: 1994-09-09
Abstract
Abstract A brake force distributor includes a cylinder and a stepped piston disposed in the cylinder and biassed toward one end position of the piston by a control force. The piston is provided with a pressure medium passage internally of the piston to connect the input to the output of the distributor under control of a valve disposed in the passage, the control of the valve being in accordance with the magnitude of the control force. To ensure full brake pressure at the output of the distributor when the control force fails, the piston is moved to the other end position of the piston and provides a direct connection between the input and output of the distributor along the periphery of the piston.
Inventors
- 👤 Hermann Seip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:12
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/18; B60T8/1812; B60T8/1831
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
301 words
A brake force distributor comprising: a cylinder having a longitudinal axis; a stepped piston disposed coaxial of said axis in a slidably sealed relation with the interior surface of said cylinder; a first pressure chamber within said cylinder; a second pressure chamber within said cylinder; said first and second pressure chambers being separated by said piston; a pressure medium input connected to said first chamber; a pressure medium output connected to said second chamber; a pressure medium passage within said piston coaxial of said axis connecting said first and second chambers; first means to provide a control force to bias said piston toward said second chamber; a valve disposed in said passage to control the passage of pressure medium from said input to said output in accordance with the magnitude of said control force; and second means included as a part of said cylinder to directly connect said first and second chambers upon failure of said control force; said cylinder including a first portion having a first given inner diameter adjacent said output, a second portion having a second given inner diameter adjacent said input greater than said first given diameter and a third portion interconnecting said first and second portions, and said piston including a first portion having a third given outer diameter less than said first given inner diameter to provide said second chamber and a second portion having a fourth given outer diameter equal to said first given inner diameter, said piston being maintained in said first portion of said cylinder during the presence of said control force and moved to said second given portion of said cylinder upon failure of said control force to connect said first and second chambers along the outer periphery of said piston, said second portion of said cylinder providing said second means.
Claim 2
Dependent Claim
301 words
A brake force distributor comprising: a cylinder having a longitudinal axis; a stepped piston disposed coaxial of said axis in a slidably sealed relation with the interior surface of said cylinder; a first pressure chamber within said cylinder; a second pressure chamber within said cylinder; said first and second pressure chambers being separated by said piston; a pressure medium input connected to said first chamber; a pressure medium output connected to said second chamber; a pressure medium passage within said piston coaxial of said axis connecting said first and second chambers; first means to provide a control force to bias said piston toward said second chamber; a valve disposed in said passage to control the passage of pressure medium from said input to said output in accordance with the magnitude of said control force; and second means included as a part of said cylinder to directly connect said first and second chambers upon failure of said control force; said cylinder including a first portion having a first given inner diameter adjacent said output, a second portion having a second given inner diameter adjacent said input greater than said first given diameter and a third portion interconnecting said first and second portions, and said piston including a first portion having a third given outer diameter less than said first given inner diameter to provide said second chamber and a second portion having a fourth given outer diameter equal to said first given inner diameter, said piston being maintained in said first portion of said cylinder during the presence of said control force and moved to said second given portion of said cylinder upon failure of said control force to connect said first and second chambers along the outer periphery of said piston, said second portion of said cylinder providing said second means.
References Cited (Backward Citations)
US3762776A
Cited
US3841713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |