US 12,264,669 B2
Self-priming transfer pump with quick pump attachment/detachment
Justin Peterson, Floyd, IA (US); Ron Renkel, Floyd, IA (US); Ryan Bergman, Memphis, TN (US); and Harley Thordson, Floyd, IA (US)
Assigned to FARMCHEM CORP, Floyd, IA (US)
Filed by FARMCHEM CORP, Floyd, IA (US)
Filed on Mar. 22, 2022, as Appl. No. 17/655,871.
Claims priority of provisional application 63/200,719, filed on Mar. 24, 2021.
Prior Publication US 2022/0307517 A1, Sep. 29, 2022
Int. Cl. F04B 53/22 (2006.01); F04B 43/02 (2006.01); F04B 43/04 (2006.01)
CPC F04B 53/22 (2013.01) [F04B 43/026 (2013.01); F04B 43/04 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An interchangeable pump section for use in a self-priming transfer pump, the interchangeable pump section comprising:
a pump housing, comprises:
an inlet,
an outlet, and
a series of notches and protrusions symmetrically arrayed about an internal peripheral surface of the pump housing, each protrusion of said series of protrusions comprising a ramp at one end and a tooth at the other end;
a pump cartridge permanently affixed to the pump housing to eliminate user exposure and need for tools when replacing or changing out the pump cartridge, said pump cartridge comprising therewithin:
a diaphragm;
a wobble plate; and
a valve plate with valves; and
an external locking mechanism to prevent the interchangeable pump section from rotating and disengaging from a motor section, wherein the external locking mechanism includes:
a locking tab and a head screw;
legs in parallel relation to one another, each of the legs extending away from a body of the external locking mechanism;
a peg extending inwardly from each of the legs; and
a slot in each of the legs.