Patent US3673587A successfully refreshed from Google Patents.
US3673587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level indicator having an adjustable float
Assignee: Individual
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Filing: 1970-05-11
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Granted: 1972-06-27
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Expires: 1990-05-11
Abstract
Abstract A device for indicating a low level in the reservoir of an automobile windshield washer system comprises a warning light on the vehicle''s dashboard and a float-controlled switch that operates the warning light when the float drops to a predetermined level. At its lower end, the float has a series of end-to-end elements that are joined together by flangible connections so that one or more of the sections can be removed to shorten the float and allow it to be used in reservoirs of different depths.
Inventors
- 👤 John J Baruch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:57
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/56; G01F23/60; G01F23/76
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
192 words
A depletion indicator for indicating the need for refill of windshield washing liquid in a reservoir in an automobile, said indicator comprising: a housing, means for mounting the housing on a reservoir of windshield washing liquid in an automobile, the housing having an opening that opens into the reservoir, and the housing making a fluidtight fit with the reservoir, a float extending from the housing through the opeNing thereof that opens into the reservoir and movable in response to changes in liquid level in the reservoir, an electric circuit including signalling means for signalling depletion of windshield washing liquid in said reservoir, said circuit being controlled by cooperating electric switch contacts that are in the housing and controlled by the float, and means whereby the length of the float may be varied to accommodate the indicator to reservoirs of various depths, said last means comprising a series of elements any number of which may be separated from the remainder of the structure constituting the float, each element being connected to the preceding element of the float structure by a frangible bridge that is ruptured to separate the element from the float structure.
Claim 2
Dependent Claim
192 words
A depletion indicator for indicating the need for refill of windshield washing liquid in a reservoir in an automobile, said indicator comprising: a housing, means for mounting the housing on a reservoir of windshield washing liquid in an automobile, the housing having an opening that opens into the reservoir, and the housing making a fluidtight fit with the reservoir, a float extending from the housing through the opeNing thereof that opens into the reservoir and movable in response to changes in liquid level in the reservoir, an electric circuit including signalling means for signalling depletion of windshield washing liquid in said reservoir, said circuit being controlled by cooperating electric switch contacts that are in the housing and controlled by the float, and means whereby the length of the float may be varied to accommodate the indicator to reservoirs of various depths, said last means comprising a series of elements any number of which may be separated from the remainder of the structure constituting the float, each element being connected to the preceding element of the float structure by a frangible bridge that is ruptured to separate the element from the float structure.
Claim 3
Dependent Claim
35 words
A liquid level indicator according to claim 1 in which the elements are joined in end-to-end relationship by frangible bridges are so that successive removal of elements successively shortens the length of the float structure.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |