US 12,442,364 B2
Two-stage pump and method of operation
Kevin Ciocia, Burlingame, CA (US)
Assigned to Aperia Technologies, Inc., Hayward, CA (US)
Filed by Aperia Technologies, Inc., Hayward, CA (US)
Filed on Dec. 11, 2023, as Appl. No. 18/535,939.
Prior Publication US 2025/0188915 A1, Jun. 12, 2025
Int. Cl. F04B 35/01 (2006.01); B60C 23/12 (2006.01); F04B 5/02 (2006.01); F04B 39/00 (2006.01); F04B 39/06 (2006.01); F04B 53/08 (2006.01); F04B 53/12 (2006.01)
CPC F04B 35/01 (2013.01) [B60C 23/121 (2020.05); B60C 23/126 (2020.05); B60C 23/127 (2020.05); B60C 23/133 (2020.05); B60C 23/137 (2020.05); F04B 5/02 (2013.01); F04B 39/0016 (2013.01); F04B 39/06 (2013.01); F04B 53/08 (2013.01); F04B 53/12 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A pump, comprising:
a cylinder comprising a cylinder first end and a cylinder second end;
a piston housed within the cylinder and comprising a piston front face, piston back face, and a piston rod extending through the cylinder second end, wherein the cylinder and piston cooperatively define:
a first stage between the cylinder first end and the piston front face; and
a second stage between the cylinder second end and the piston back face;
wherein the piston is operable between:
a forward stroke, during which the piston pressurizes working fluid within the first stage to a first pressure and forces the working fluid from the first stage into the second stage; and
a backward stroke, during which the piston pressurizes working fluid from the first pressure to a second pressure within the second stage and forces the working fluid from the second stage out of the pump;
a set of cylinder cooling channels thermally connected to and extending alongside the cylinder; and
a set of cooling heads mounted to the piston and complementarily nested within the cylinder cooling channels;
wherein actuation of the piston relative to the cylinder actuates the cooling heads within the cylinder cooling channels to convect heat from the cylinder.