US3761657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow switch vane with apertures covering substantially the entire surface area to minimize turbulence
Assignee: Individual
•
Filing: 1972-04-14
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Granted: 1973-09-25
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Expires: 1992-04-14
Abstract
Abstract A sensing device for a switch activated by fluid flow through a pipe. The flowing fluid exerts a force on the device which in turn activates the switch. The device in its preferred form includes a paddle with symmetrically placed apertures which cover substantially the entire effective surface and to allow flow through the body of the paddle to prevent cavitation and turbulence in the fluid. Reduction or elimination of these flow disturbances extends the service life of the paddle and its connection to the flow switch.
Inventors
- 👤 L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:03
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
34 words
A flow switch having a means for sensing flow in a pipe, wherein said sensing means is pervious to fluids, said pervious sensing means comprising a brush having bristles and a thin rigid base.
Claim 2
Dependent Claim
34 words
A flow switch having a means for sensing flow in a pipe, wherein said sensing means is pervious to fluids, said pervious sensing means comprising a brush having bristles and a thin rigid base.
Claim 3
Dependent Claim
48 words
A flow switch device for sensing flow in a pipe, said device having a sensor member extending into the path of the flow to be sensed, said sensor member having symmetrically placed apertures which cover substantially the entire effective surface of said member in order to minimize turbulence.
Claim 4
Dependent Claim
48 words
A flow switch device for sensing flow in a pipe, said device having a sensor member extending into the path of the flow to be sensed, said sensor member having symmetrically placed apertures which cover substantially the entire effective surface of said member in order to minimize turbulence.
Claim 5
Dependent Claim
14 words
The device of claim 2 in which the sensor member comprises a rigid screen.
Claim 6
Dependent Claim
16 words
The device of claim 2 wherein the sensor member is curved transversely to enhance structural rigidity.
Claim 7
Dependent Claim
39 words
The device of claim 2 wherein the sensor member comprises a plurality of apertured plates, one of the plates being movable relative to another of the plates to vary the degree of alignment of the apertures in the plates.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |