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Patent US3593271A successfully refreshed from Google Patents.
US3593271A
Expired / Lapsed
US
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Brake-fluid-level alarm for a two-compartment master-cylinder reservoir
Assignee: Continental Teves AG and Co OHG
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Filing: 1968-09-17
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Granted: 1971-07-13
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Expires: 1988-09-17
Abstract
Abstract A brake-fluid reservoir for a two-compartment master cylinder has an upper and a lower portion. The lower portion is divided by an upright partition wall. A float is movable in the upper portion to close a switch when the brake fluid in the reservoir drops below a predetermined lower limit. The upper portion is of restricted diameter in comparison to the lower portion and the float is only movable in the upper portion directly above the wall which terminates short of the top of the reservoir.
Inventors
- 👤 Gert Schrader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:20
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/26; B60T17/00; B60T17/18; B60T17/22; B60T17/225
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
114 words
A brake-fluid reservoir for a dual brake system having a dual master cylinder with two fluid compartments, and an alarm device for indicating a brake-fluid level in said reservoir, said reservoir comprising: a housing having an upper and a lower portion and formed with an upright partition wall dividing said lower portion into two chambers, each of said chambers communicating with a respective one of said master-cylinder compartments, and a neck extending upwardly above said wall; a cap threaded onto said neck for closing same; and switch means on said cap above said upright wall and in said neck responsive to said brake-fluid level therein and connectable to said alarm device for operating same.
Claim 2
Dependent Claim
114 words
A brake-fluid reservoir for a dual brake system having a dual master cylinder with two fluid compartments, and an alarm device for indicating a brake-fluid level in said reservoir, said reservoir comprising: a housing having an upper and a lower portion and formed with an upright partition wall dividing said lower portion into two chambers, each of said chambers communicating with a respective one of said master-cylinder compartments, and a neck extending upwardly above said wall; a cap threaded onto said neck for closing same; and switch means on said cap above said upright wall and in said neck responsive to said brake-fluid level therein and connectable to said alarm device for operating same.
Claim 3
Dependent Claim
17 words
The reservoir defined in claim 3 wherein said upper portion is narrow compared to said lower portion.
Claim 4
Dependent Claim
116 words
A brake-fluid reservoir fora dual brakesystem having a dual master cylinder with two fluid compartments, and an an alarm device for indicating a brake-fluid level in said reservoir, said reservoir comprising: a housing having an upper and a lower portion and formed with an upright partition wall dividing said lower portion into two chambers, each of said chambers communicating with a respective one of said master-cylinder compartments; and switch means above said upright wall and in said upper portion responsive to said brake-fluid level therein and connectable to said alarm device for operating same, said switch means comprising a float in said upper portion and contact means actuatable by said float for operating said alarm device.
Claim 5
Dependent Claim
116 words
A brake-fluid reservoir fora dual brakesystem having a dual master cylinder with two fluid compartments, and an an alarm device for indicating a brake-fluid level in said reservoir, said reservoir comprising: a housing having an upper and a lower portion and formed with an upright partition wall dividing said lower portion into two chambers, each of said chambers communicating with a respective one of said master-cylinder compartments; and switch means above said upright wall and in said upper portion responsive to said brake-fluid level therein and connectable to said alarm device for operating same, said switch means comprising a float in said upper portion and contact means actuatable by said float for operating said alarm device.
Claim 6
Dependent Claim
75 words
The reserVoir defined in claim 3 wherein said switch means further comprises a vertically movable upright rod, said float being mounted at one end of said pin, said contact means including a conductive member mounted at the other end of said pin, and at least one contact on said upper portion engageable by said conductive member on downward displacement of said float, thereby forming a closed path of conduction therewith for operating said alarm device.
Claim 7
Dependent Claim
29 words
The reservoir defined in claim 3 wherein, upon engagement of said contact with said conductive member, said float lies just above said partition, at a position of closest approach.
Claim 8
Dependent Claim
36 words
The reservoir defined in claim 3 wherein said upper portion is formed with an upwardly open mouth, said reservoir further comprising a filler-opening cap releasably closing said mouth, said switch means being mounted on said cap.
References Cited (Backward Citations)
US3384885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |