US3872304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow measuring sensor
Assignee: United States Department of the Army
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Filing: 1974-01-25
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Granted: 1975-03-18
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Expires: 1994-01-25
Abstract
Abstract The device of the present invention involves the use of a circular track with a ball mounted therein. The flow to be measured is introduced tangently into the track and the velocity of the ball circling the track is measured by the interruption of a light beam each time the ball makes a revolution.
Inventors
- 👤 Little J Little
- 👤 Joseph A Oddo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:35
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/02; G01F; G01F1/00; G01F1/05; G01F1/056
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A fluid flow measuring sensor comprising a housing a circular track formed in said housing, an inlet passageway in said housing entering said track tangentially adjacent the outer wall of said track, a slit extending completely around the inner wall of said track and communicating with a discharge passageway in said housing, a ball in said circular track, means for detecting movement of said ball around said circular track, said movement detecting means comprises a light source in said housing adjacent said circular track, and a photo sensing device in said housing adjacent said circular track and opposite said light source.
Claim 2
Dependent Claim
101 words
A fluid flow measuring sensor comprising a housing a circular track formed in said housing, an inlet passageway in said housing entering said track tangentially adjacent the outer wall of said track, a slit extending completely around the inner wall of said track and communicating with a discharge passageway in said housing, a ball in said circular track, means for detecting movement of said ball around said circular track, said movement detecting means comprises a light source in said housing adjacent said circular track, and a photo sensing device in said housing adjacent said circular track and opposite said light source.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |