US3751614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid level indicating devices with pull to test feature
Assignee: Girling Ltd
•
Filing: 1972-05-24
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Granted: 1973-08-07
•
Expires: 1992-05-24
Abstract
Abstract A fluid indicating switch is provided with a test feature. A closure cap assembly having magnetically actuated switch means and a magnetic fluid level responsive means is attached to a fluid reservoir. The fluid level responsive magnetic means will actuate the switch in response to changes in the reservoir fluid level or by manual pull upon the cap assembly.
Inventors
- 👤 P Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:32
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/22; B60T17/225; G; G01; G01F; G01F23/00; G01F23/30; G01F23/64; G01F23/72; G01F23/74
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
141 words
In or for a closure cap assembly having a main cap part for attachment to a fluid reservoir, a fluid level indicating device comprising a main housing, a level responsive member, a housing member contained, at least in part, within the main housing, magnetic means mounted on one of said members, and magnetically operable switch means mounted on the other of said members, the switch means being operable in response to movement of the magnetic means relative thereto, means for effecting automatic movement of said magnetic means relative to said switch means by movement of the level responsive member in response to changes in the reservoir fluid level, and alternative means for effecting the relative movement between said magnetic means and said switch means by relative manual movement between the level responsive member and the housing member to test the device.
Claim 2
Dependent Claim
141 words
In or for a closure cap assembly having a main cap part for attachment to a fluid reservoir, a fluid level indicating device comprising a main housing, a level responsive member, a housing member contained, at least in part, within the main housing, magnetic means mounted on one of said members, and magnetically operable switch means mounted on the other of said members, the switch means being operable in response to movement of the magnetic means relative thereto, means for effecting automatic movement of said magnetic means relative to said switch means by movement of the level responsive member in response to changes in the reservoir fluid level, and alternative means for effecting the relative movement between said magnetic means and said switch means by relative manual movement between the level responsive member and the housing member to test the device.
Claim 3
Dependent Claim
32 words
A device according to claim 1, wherein the switch means is mounted on the housing member and the magnetic means is mounted on the level responsive member, which surrounds the housing member.
Claim 4
Dependent Claim
36 words
A device according to claim 1, wherein the said relative movement between the level responsive member and the housing member is in response to manual relative axial movement between the housing member and the main housing.
Claim 5
Dependent Claim
65 words
A device according to claim 1, wherein the main housing extends through the main cap part and is secured thereto, and further comprising a manually grippable cap means fast with the housing member, which cap means encloses one end of the main housing and is movable relative thereto to cause relative movement between the housing member and the level responsive member, to test the device.
Claim 6
Dependent Claim
59 words
A device according to claim 4, including means for limiting relative movement between the housing member and the main housing, said means comprising a retaining member surrounding the said one end of the main housing and securing the main housing to the main cap part, and stop means formed on the retaining member for engagement by the cap means.
Claim 7
Dependent Claim
51 words
A device according to claim 4, including means for limiting relative movement between the housing member and the main housing, said means comprising a radially outwardly extending stop means carried by the housing member at one end thereof remote from the cap means, and arranged to abut the level responsive member.
Claim 8
Dependent Claim
37 words
A device according to claim 1, wherein the closure cap assembly comprises an extended passage means extending, in use, between the outside of the main cap part and a reservoir space above the fluid in the reservoir.
Claim 9
Dependent Claim
54 words
A device according to claim 7, wherein the cap assembly comprises a cover enclosing the main cap part, and the extended passage means comprises at least one passageway formed between the main cap part and the cover and a vent hole presented by the main cap part and communicating with the or each passageway.
Claim 10
Dependent Claim
117 words
A device according to claim 8, further comprising a radially extending shoulder fast with the main housing, a radially extending flange carried by the main housing, and an axially extending projecting means formed on said flange, wherein the main cap part and the cover are clamped between the shoulder and the flange and the projecting means engages the cover to ensure sealing engagement between the cover and the main cap part in the vicinity of the projecting means. 10. A device according to claim 7, wherein the extended passage means comprises at least one passageway between the cap means and the main housing and at least one communicating passageway between the housing member and the main housing.
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US3488464A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |