Patent US3609680A successfully refreshed from Google Patents.
US3609680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake fluid reservoir
Assignee: Continental Teves AG and Co OHG
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Filing: 1968-05-03
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Granted: 1971-09-28
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Expires: 1988-05-03
Abstract
Abstract A brake fluid reservoir with an alarm switch for signaling an insufficient fluid level in its interior. The mechanism is mounted in an insert in one neck of a filler opening of the reservoir, the connections between the alarm and the switch mechanism being led laterally out through a projection of the insert passing through the side of the neck; the insert is provided with a hole through which brake fluid can be poured.
Inventors
- 👤 Juan Belart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:27
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/26; B60T17/00; B60T17/18; B60T17/22; B60T17/225; G; G01; G01F; G01F23/00; G01F23/30; G01F23/56
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
161 words
A brake fluid reservoir for a vehicular brake system having a master cylinder and an alarm device for indicating a brake fluid level in said reservoir, said reservoir comprising: a housing forming a chamber connectable with said master cylinder and having a top wall provided with a tubular neck forming filler opening communicating with said chamber; an insert received in said neck and provided with at least one bore opening into said chamber; a removable cap adapted to cover said filler opening, said neck and said cap being provided with interlocking formations effective upon rotation of said cap to enable said cap to be removed from said neck while said insert remains in place therein, said housing being provided with a lateral passage in said neck below said cap; and switch means in said chamber movably mounted on said neck and responsive to said brake fluid level while being connectable through said lateral passage to said alarm device for operating same.
Claim 2
Dependent Claim
161 words
A brake fluid reservoir for a vehicular brake system having a master cylinder and an alarm device for indicating a brake fluid level in said reservoir, said reservoir comprising: a housing forming a chamber connectable with said master cylinder and having a top wall provided with a tubular neck forming filler opening communicating with said chamber; an insert received in said neck and provided with at least one bore opening into said chamber; a removable cap adapted to cover said filler opening, said neck and said cap being provided with interlocking formations effective upon rotation of said cap to enable said cap to be removed from said neck while said insert remains in place therein, said housing being provided with a lateral passage in said neck below said cap; and switch means in said chamber movably mounted on said neck and responsive to said brake fluid level while being connectable through said lateral passage to said alarm device for operating same.
Claim 3
Dependent Claim
54 words
A reservoir as defined in claim 1 wherein said neck is generally upright and said insert has a body formed with a substantially cylindrical peripheral wall generally coextensive with said neck, with a boss spaced inwardly from a portion of said peripheral wall, and with a web connecting said boss to said peripheral wall.
Claim 4
Dependent Claim
60 words
A reservoir as defined in claim 2 whereiN said housing includes an annular ledge within and near the bottom of said neck, a circular rib on said cap extending downwardly toward said insert, a first annular gasket between said peripheral wall and said cap surrounding said circular rib, and a second annular gasket between said peripheral wall and said ledge.
Claim 5
Dependent Claim
51 words
A reservoir as defined in claim 2 wherein a first portion of said web is higher than a second portion of said web, said second portion of said web being formed with said bore in the form of a throughgoing hole opening into said chamber for filling same with brake fluid.
Claim 6
Dependent Claim
60 words
A reservoir as defined in claim 2 wherein said boss is provided with a vertical second bore, said switch means comprising a pin slidably mounted in said vertical second bore, and actuating float on the lower end of said pin, a conducting member on the upper end of said pin, and at least one contact engageable with said conducting member.
Claim 7
Dependent Claim
29 words
A reservoir as defined in claim 5 wherein said cap defines an upper limit of travel of said pin and said insert defines a lower limit of travel thereof.
Claim 8
Dependent Claim
38 words
A reservoir as defined in claim 5 wherein said insert further includes a lateral projection fitting said lateral passage, said switch means including at least one lead connected to said alarm device and passing through said lateral projection.
Claim 9
Dependent Claim
86 words
A reservoir as defined in claim 7 wherein said lead comprises a plug embedded in said lateral projection, a conductor connecting said pin to said contact, said pin extending outwardly from said neck; said switch means comprising snap rings engaging said pin for holding said conducting element on said pin; said peripheral wall, said web, defining a compartment in said neck open upwardly upon removal of said cap, said compartment communicating with said chamber through said throughgoing hole and containing said contact and said conducting element.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |