US4428242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeter using twisting torque
Assignee: Henry Pratt Co LLC
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Filing: 1982-03-11
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Granted: 1984-01-31
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Expires: 2002-03-11
Abstract
Abstract The invention relates to a flow rate measuring device in a liquid flow including a torque detecting member having its longitudinal plane fixedly mounted at an acute angle relative to the direction of liquid flow. Energy from the liquid flow provides a torsional stress on the mounting means. A torque detecting device is provided to detect the torsional stress and converts such measured torque into a flow rate of the liquid flow.
Inventors
- 👤 John R. Holstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:59
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A flow rate measuring device comprising: a cylindrical conduit adapted for fluid flow therethrough along longitudinal axis thereof, a torque detecting member of a disc shape, a rod shaped attachment means fixedly attached to and passing through the center of said torque detecting means, said attachment means having one end fixedly attached to said conduit so as to support said torque detecting member in a predetermined acute angle to said longitudinal axis of said conduit, strain gauge type torque measuring means affixed to said attachment means and display means operatively connected to said torque measuring means, said torque detecting member adapted to transmit directly to said attachment means the force of a fluid flowing through said conduit in the form of a torque, said torque measuring means utilizing said torque to transmit a signal to said display means whereby said signal will be converted to a visual display in units of rate of flow of fluid through said conduit.
Claim 2
Dependent Claim
159 words
A flow rate measuring device comprising: a cylindrical conduit adapted for fluid flow therethrough along longitudinal axis thereof, a torque detecting member of a disc shape, a rod shaped attachment means fixedly attached to and passing through the center of said torque detecting means, said attachment means having one end fixedly attached to said conduit so as to support said torque detecting member in a predetermined acute angle to said longitudinal axis of said conduit, strain gauge type torque measuring means affixed to said attachment means and display means operatively connected to said torque measuring means, said torque detecting member adapted to transmit directly to said attachment means the force of a fluid flowing through said conduit in the form of a torque, said torque measuring means utilizing said torque to transmit a signal to said display means whereby said signal will be converted to a visual display in units of rate of flow of fluid through said conduit.
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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) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |