US 12,241,462 B2
Bypass and demand pump and valve system for bypass and demand pump
Logan Cipala, Ellsworth, WI (US); Matt Johnson, Champlin, MN (US); and David Beaudry, Minneapolis, MN (US)
Assigned to Delavan AG Pumps, Inc., Minneapolis, MN (US)
Filed by Delavan AG Pumps, Inc., Minneapolis, MN (US)
Filed on Jun. 28, 2024, as Appl. No. 18/759,318.
Application 18/759,318 is a continuation of application No. 18/344,596, filed on Jun. 29, 2023, abandoned.
Application 18/344,596 is a continuation of application No. 16/460,729, filed on Jul. 2, 2019, abandoned.
Claims priority of provisional application 62/693,781, filed on Jul. 3, 2018.
Prior Publication US 2025/0003401 A1, Jan. 2, 2025
Int. Cl. F04B 43/02 (2006.01); F04B 43/00 (2006.01); F04B 43/12 (2006.01); F04B 49/24 (2006.01); F04B 53/16 (2006.01); F16K 1/30 (2006.01); F16K 27/00 (2006.01)
CPC F04B 43/02 (2013.01) [F04B 49/24 (2013.01); F04B 53/16 (2013.01); F16K 1/301 (2013.01); F16K 27/003 (2013.01); F04B 43/0045 (2013.01); F04B 43/1207 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A diaphragm pump comprising:
a head comprising an inlet port and an outlet port and defining an inlet side including a plurality of inlet chambers; a diaphragm; and an outlet side having a center outlet chamber intermediate the plurality of inlet chambers;
a plurality of inlet valves, wherein each of the plurality of inlet chambers includes an associated inlet valve of the plurality of inlet valves, and the diaphragm is sequentially engaged by each of the inlet valves of the plurality of inlet valves;
a single shutoff check valve controlling fluid flow from the center outlet chamber, the single shutoff check valve comprising a plunger in the center outlet chamber movable between a fully closed position and an open position;
a single bypass valve within the center outlet chamber and in fluid communication with the center outlet chamber and each of the plurality of inlet chambers, the center outlet chamber intersecting each of the plurality of inlet chambers;
a single shutoff switch, the single shutoff check valve being actuated by the single shutoff switch.