US 12,440,858 B2
Backpack sprayer
Qi Li, Dongguan (CN); Waifa He, Dongguan (CN); Zhengjun Wang, Dongguan (CN); Hunter Brown, Anderson, SC (US); and Spencer Mitchell, Anderson, SC (US)
Assigned to TECHTRONIC CORDLESS GP, Anderson, SC (US)
Appl. No. 18/248,328
Filed by TECHTRONIC CORDLESS GP, Anderson, SC (US)
PCT Filed Oct. 9, 2020, PCT No. PCT/CN2020/119882
§ 371(c)(1), (2) Date Apr. 7, 2023,
PCT Pub. No. WO2022/073170, PCT Pub. Date Apr. 14, 2022.
Prior Publication US 2024/0001384 A1, Jan. 4, 2024
Int. Cl. B05B 9/08 (2006.01); B05B 12/00 (2018.01); F04B 17/06 (2006.01); F04B 23/02 (2006.01)
CPC B05B 9/0861 (2013.01) [B05B 12/0024 (2018.08); F04B 17/06 (2013.01); F04B 23/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A backpack fluid dispenser comprising:
a housing comprising a bottom face and defining:
a fluid container;
a battery compartment for receiving a battery; and
a chamber for receiving a control assembly and a pump assembly, wherein the control assembly comprises a rotatable dial having a cam surface for controlling on and off of the pump assembly; and
a dispensing assembly for dispensing fluid from the fluid container,
wherein:
the pump assembly is configured to pump the fluid from the fluid container to the dispensing assembly;
the control assembly is configured to control the pump assembly based solely on a rotational position of the rotatable dial;
the rotational position of the rotatable dial is detected based on a direct measurement of rotational movement of the rotatable dial independent of any translational motion of a shaft supporting the rotatable dial;
the battery compartment is positioned above the bottom face with a first height therebetween; and
the control assembly is positioned above the bottom face with a second height therebetween.