US 12,092,500 B2
Fluid flow detection device
Thomas P Driscoll, Crozet, VA (US)
Filed by Thomas P Driscoll, Crozet, VA (US)
Filed on Apr. 10, 2022, as Appl. No. 17/717,100.
Prior Publication US 2023/0324206 A1, Oct. 12, 2023
Int. Cl. G01F 1/075 (2006.01)
CPC G01F 1/075 (2013.01) 18 Claims
OG exemplary drawing
 
17. A fluid flow sensing device comprising:
a stem portion;
a paddle portion;
a pivot disposed between the stem portion and the paddle portion;
a magnetic opener configured to bias the paddle portion away from the stem portion into an “off” position;
a sensing device associated with the stem portion and the paddle portion which, upon a sufficient pressure impending on the paddle portion by a flowing fluid to overcome the magnetic opener causing the paddle portion to pivot to an “on” position towards the stem portion, creates an electronic signal indicating detection of fluid flow above a predetermined flow rate threshold, and
an adjustable portion to increase or decrease a biasing force of the magnetic opener, thereby allowing adjustment of the predetermined flow rate threshold.