US 11,913,439 B2
Multi-fluid precision calibration pressure source
Amir Gnessin, Woodland Hills, CA (US); and Robert T. Welther, Woodland Hills, CA (US)
Assigned to King Nutronics, LLC, Woodland Hills, CA (US)
Filed by King Nutronics Corporation, Woodland Hills, CA (US)
Filed on Aug. 19, 2019, as Appl. No. 16/544,777.
Application 16/544,777 is a division of application No. 15/094,104, filed on Apr. 8, 2016, granted, now 10,385,835.
Application 15/094,104 is a division of application No. 13/771,006, filed on Feb. 19, 2013, granted, now 9,309,898, issued on Apr. 12, 2016.
Claims priority of provisional application 61/601,872, filed on Feb. 22, 2012.
Prior Publication US 2020/0141397 A1, May 7, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. F04B 37/12 (2006.01); F16K 11/07 (2006.01); F16K 31/528 (2006.01); F16K 17/04 (2006.01); F16K 15/02 (2006.01); F04B 37/14 (2006.01); F04B 7/02 (2006.01); F04F 1/00 (2006.01); G01L 27/00 (2006.01)
CPC F04B 37/12 (2013.01) [F04B 37/14 (2013.01); F04F 1/00 (2013.01); F16K 11/0704 (2013.01); F16K 15/026 (2013.01); F16K 17/04 (2013.01); F16K 31/528 (2013.01); G01L 27/005 (2013.01); F04B 7/02 (2013.01); Y10T 137/86083 (2015.04)] 15 Claims
OG exemplary drawing
 
1. A portable calibration pressure device for calibrating pressurized systems, said calibration pressure device comprising:
a pump having an inlet and an outlet;
a manifold fluidly connected to the pump;
a reservoir fluidly connected to the pump; and
a pressure relief valve comprising:
a pressure relief valve housing comprising a first port in fluid communication with the manifold, a second port in fluid communication with the reservoir, and a channel connecting the first port and the second port;
a plunger positioned within the housing;
a sealing tip attached to a first end of the plunger, the sealing tip comprising a central lumen;
a spring element positioned proximate a second end of the plunger, the spring element configured to bias the plunger toward a first position in which the plunger pushes a sealing surface of the sealing tip against an opening to the channel, blocking fluid communication between the first port and the second port;
a bleed valve needle extending through the plunger, the bleed valve needle having a distal tip configured to seal within the central lumen of the sealing tip; and
a handle assembly comprising a handle, the handle assembly configured to attach to a proximal end of the bleed valve needle, wherein rotating the handle in a first direction moves the distal tip of the bleed valve needle into the central lumen of the sealing tip to seal the central lumen and rotating the handle in a second direction moves the distal tip of the bleed valve needle away from the central lumen of the sealing tip.