US 12,146,576 B2
Piston for adjustable pressure reducing valve and an adjustable pressure reducing valve
Jeffrey Saunders, Hamilton (CA); and William Palamar, Burlington (CA)
Assigned to PALAMAR INDUSTRIES INC., Burlington (CA)
Filed by PALAMAR INDUSTRIES INC., Burlington (CA)
Filed on May 3, 2023, as Appl. No. 18/311,423.
Claims priority of provisional application 63/339,718, filed on May 9, 2022.
Prior Publication US 2023/0358334 A1, Nov. 9, 2023
Int. Cl. F16K 17/00 (2006.01); F16K 31/122 (2006.01); G05D 16/10 (2006.01); F16K 31/60 (2006.01); F16K 41/16 (2006.01)
CPC F16K 17/00 (2013.01) [F16K 31/1221 (2013.01); F16K 31/1223 (2013.01); G05D 16/103 (2013.01); F16K 31/60 (2013.01); F16K 41/16 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A piston for a pressure-reducing valve, the piston comprising:
a tubular housing having an internal longitudinal bore extending from a first end to a second end;
an exterior circumferential sealing disc positioned along a length of the tubular housing at a distance from the first and the second ends, the sealing disc for sealing engagement with internal walls of a correspondingly shaped internal pressure chamber of the pressure reducing valve, the sealing disc having an upper face and a lower face, the upper and lower face being generally perpendicular to a longitudinal axis of the tubular housing;
one or more first fluid ports extending through the tubular housing and into the longitudinal bore at a position between the sealing disc and the first end; and
one or more second fluid ports extending through the tubular housing and into the longitudinal bore at a position between the sealing disc and the second end,
wherein the longitudinal bore of the tubular housing is dimensioned to receive a piston stem therein, when received within the longitudinal bore the piston stem sealingly engaging an internal surface of the longitudinal bore between the sealing disc and the second end so as to prevent the passage of fluid therebetween, when received within the longitudinal bore the piston stem, together with a portion of the internal surface of the longitudinal bore, forming one or more fluid passageways therebetween, fluidly connecting the one or more first fluid ports with the one or more second fluid ports,
wherein the second fluid ports are inclined relative to the longitudinal axis of the tubular housing and extend through at least a portion of the sealing disc, intersecting at least a portion of the upper face of the sealing disc.