US 12,448,957 B2
Dual motor pump assembly
Shawn Kahan, Dorval (CA); Sun Weiguo, Ningbo (CN); Zhang Shikun, Ningbo (CN); Dong Qianqin, Ningbo (CN); Yan Fengjie, Ningbo (CN); and Yang Chuan, Ningbo (CN)
Assigned to Shawn Kahan, Dorval (CA)
Filed by Shawn Kahan, Dorval (CA)
Filed on Oct. 23, 2023, as Appl. No. 18/491,933.
Prior Publication US 2025/0129774 A1, Apr. 24, 2025
Int. Cl. F04B 23/06 (2006.01); B08B 3/02 (2006.01); F04B 17/03 (2006.01); F04B 53/10 (2006.01)
CPC F04B 23/06 (2013.01) [B08B 3/026 (2013.01); F04B 17/03 (2013.01); F04B 53/10 (2013.01); B08B 2203/0223 (2013.01); B08B 2203/0247 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A pressure washer pump assembly comprising,
first and second pump assemblies each having an associated pump chamber and being adapted to pressurize fluid therein, a conduit assembly for receiving a pressurized fluid flow therethrough, and first and second valve assemblies,
the conduit assembly comprising a fluid inlet conduit, an intermediate conduit and a fluid outlet conduit,
the fluid inlet conduit comprising:
an inlet end adapted for fluid communication with a water source, providing a fluid flow at an input pressure, and
an output end fluidically communicating with the first valve assembly, the first valve assembly including a first valve chamber and a first valve member, the actuation of the first valve member in the first valve chamber selectively communicating the output end of the inlet conduit and an inlet end intermediate conduit either directly, wherein the fluid flow is received in the intermediate conduit substantially at the input pressure, or via the first pump chamber whereby the activation of the first pump assembly pressurizes the fluid flow received in the intermediate conduit to a first pressure higher than the input pressure,
an output end of the intermediate conduit fluidically communicating with the second valve assembly,
the second valve assembly including a second valve chamber and a second valve member, the actuation of the second valve member in the second valve chamber selectively communicating the output end of the intermediate conduit and an inlet end of the fluid outlet conduit either directly, wherein the fluid flow is received in the fluid outlet conduit at substantially the same pressure as in the fluid flow in intermediate conduit, or via the second pump chamber whereby activation of the second pump assembly pressurizes the fluid flow received in the fluid outlet conduit to a second pressure higher than the pressure of the fluid flow in the intermediate conduit, and
a controller, the controller operable to concurrently activate the first pump assembly when the first valve member is actuated to fluidically communicate the output end of the inlet conduit with the first pump chamber.