US3724503A — Flow measurement and control

Claim 1

Independent Claim 206 words

A fluid flow control and measuring device comprising: a housing having a rectangular fluid flow passage therethrough, said housing having first and second lateral apertures therethrough for communication of the passage with fluid pressure measurement means, said apertures being spaced along the passage in the direction of fluid flow and said second lateral aperture being disposed centrally of the housing, a pair of control members disposed within the housing passage and each comprising a flexible plate slidably secured to the housing at the plate ends and disposed on opposite sides of the housing passage at said second housing aperture, said members having substantially the same width as said passage, and control means engaging said members and extending exteriorly of said housing in threaded engagement with the plates for moving said members laterally of said passage on opposite sides of said second aperture to thereby vary the effective passage size thereat whereby said control members comprise a venturi of adjustable opening therethrough so that same may be adjusted to establish a desired pressure differential between said first and second apertures for measuring fluid flow under widely varying conditions of flow and, furthermore, said control members are applicable for controlling the flow of fluid through the housing passage.

Claim 2

Dependent Claim 206 words

A fluid flow control and measuring device comprising: a housing having a rectangular fluid flow passage therethrough, said housing having first and second lateral apertures therethrough for communication of the passage with fluid pressure measurement means, said apertures being spaced along the passage in the direction of fluid flow and said second lateral aperture being disposed centrally of the housing, a pair of control members disposed within the housing passage and each comprising a flexible plate slidably secured to the housing at the plate ends and disposed on opposite sides of the housing passage at said second housing aperture, said members having substantially the same width as said passage, and control means engaging said members and extending exteriorly of said housing in threaded engagement with the plates for moving said members laterally of said passage on opposite sides of said second aperture to thereby vary the effective passage size thereat whereby said control members comprise a venturi of adjustable opening therethrough so that same may be adjusted to establish a desired pressure differential between said first and second apertures for measuring fluid flow under widely varying conditions of flow and, furthermore, said control members are applicable for controlling the flow of fluid through the housing passage.

Claim 3

Dependent Claim 59 words

A variable flow device for controlling fluid flow in accordance with measured flow comprising: a housing having a rectangular fluid flow passage therethrough with a pair of lateral apertures through the housing and spaced apart along the passage, said apertures being adapted for connection to differential pressure measuring and indicating means, said housing having top, bottom and side walls.

Claim 4

Dependent Claim 59 words

A variable flow device for controlling fluid flow in accordance with measured flow comprising: a housing having a rectangular fluid flow passage therethrough with a pair of lateral apertures through the housing and spaced apart along the passage, said apertures being adapted for connection to differential pressure measuring and indicating means, said housing having top, bottom and side walls.

Claim 5

Dependent Claim 123 words

The device of claim 2 further defined by said control means comprising a shaft extending from the outside of said housing completely through said housing and plates at the center of the plates and normal to the plates, said shaft being secured against longitudinal movement and being mounted for rotation in said housing, said shaft having a first end threaded in one direction and the other end threaded in the opposite direction, and means rigidly affixed to said plates about said shaft in threaded engagement with opposite ends of the shaft whereby rotation of said shaft moves the center of said plates toward or away from each other to vary the throat area of a venturi formed by the plates in said housing.

Claim 6

Dependent Claim 120 words

The device of claim 2 further defined by said control means comprising first and second axially aligned shafts extending into said housing from the exterior thereof at the center of said plates and normal thereto, the first shaft being secured to a first Of said plates and being slidably mounted in said housing with locking means for setting the shaft position whereby the position of the center of said first plate is adjustable, said second shaft being rotatably mounted in said housing and engaging said second plate whereby the position of the center of said second plate may be precisely adjusted to thus establish a controlled spacing between said plates substantially centered at the middle of said fluid flow passage.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-04-02	1976-10-02	1977-04-03	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-04-02	1980-10-02	1981-04-03	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-04-02	1984-10-02	1985-04-03	$7700.00	Window Closed / Lapsed

Flow measurement and control

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag