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US3712134A Expired / Lapsed US ⏱️ 0.0 years remaining

Variable area flowmeter

Assignee: Fischer and Porter Co
•
Filing: 1971-03-09
•
Granted: 1973-01-23
•
Expires: 1991-03-09
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Abstract

Abstract A variable-area flowmeter in which the meter tube is removably supported on a lower inlet fitting and an upper outlet fitting projecting forwardly from a mounting plate. The meter tube is provided with lateral openings adjacent the lower and upper ends thereof, which openings register respectively with the inlet and outlet fittings and are dimensioned to snugly accommodate these fittings. Extending longitudinally within the tube between the lateral openings is a tapered bore having a float therein. The inlet end of the bore is aligned with a port in the inlet fitting leading to an inlet passage, whereas the outlet end of the bore is aligned with a port in the outlet fitting leading to an outlet passage, whereby fluid introduced through the inlet fitting and passing through the bore into the outlet fitting causes the float to rise to a level determined by fluid flow rate. The meter tube may be removed simply by sliding it off the fittings, which are provided with O-rings sealably to engage the walls of the lateral openings.

Inventors

  • 👤 H Dettmer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 05:36
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/22

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 149 words
A variable-area flowmeter comprising: A. a meter tube having lower and upper lateral openings adjacent the ends thereof and a tapered bore extending longitudinally between the openings, said bore having a float therein, and B. upper and lower fittings, the axes of said fittings being disposed in parallel relation and lying in a common vertical plane, said fittings registering with said openings, the front portions of said fittings having substantially the same crosssectional dimensions as the related openings to render said tube slidable onto the front portions of said fittings, whereby said tube is removably supported thereby, said fittings each having an internal fluid passage leading to a port in alignment with the related end of the meter-tube bore whereby fluid admitted into the bore through the inlet fitting and passing out of the outlet fitting causes the float to rise to a level determined by fluid flow rate.
Claim 2
Dependent Claim 149 words
A variable-area flowmeter comprising: A. a meter tube having lower and upper lateral openings adjacent the ends thereof and a tapered bore extending longitudinally between the openings, said bore having a float therein, and B. upper and lower fittings, the axes of said fittings being disposed in parallel relation and lying in a common vertical plane, said fittings registering with said openings, the front portions of said fittings having substantially the same crosssectional dimensions as the related openings to render said tube slidable onto the front portions of said fittings, whereby said tube is removably supported thereby, said fittings each having an internal fluid passage leading to a port in alignment with the related end of the meter-tube bore whereby fluid admitted into the bore through the inlet fitting and passing out of the outlet fitting causes the float to rise to a level determined by fluid flow rate.
Claim 3
Dependent Claim 30 words
A flowmeter as set forth in claim 1, further including O-rings mounted on the front portions of said fittings to engage the surface of said openings to seal said tube.
Claim 4
Dependent Claim 55 words
A flowmeter as set forth in claim 1, wherein one of said fittings further includes a needle valve whose control knob protrudes forwardly from the front portion thereof and has a diameter which is no greater than that of the front portion of the associated fitting, whereby said knob is admissible through the related opening.
Claim 5
Dependent Claim 29 words
A flowmeter as set forth in claim 1, wherein said fittings are supported on a mounting plate, and the front portions of the fittings project forwardly from the plate.
Claim 6
Dependent Claim 25 words
A flowmeter as set forth in claim 4, wherein said tube has a rectangular cross-section, the rear of the tube lying against the mounting plate.
Claim 7
Dependent Claim 31 words
A flowmeter as set forth in claim 1, wHerein said tube includes a fixed stop at the lower end of the bore and a removable stop at the upper end thereof.

References Cited (Backward Citations)

US3232107A Cited
US3342068A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-01-23 1976-07-24 1977-01-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-01-23 1980-07-24 1981-01-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-01-23 1984-07-24 1985-01-23 $7700.00 Window Closed / Lapsed

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