US 11,815,086 B1
Displacement pump mounting and retention
David J. Thompson, Oak Grove, MN (US); Christopher A. Lins, Waverly, MN (US); Andrew J. Kopel, Stanchfield, MN (US); Glen W. Davidson, Roseville, MN (US); Chad R. Taszarek, Albertville, MN (US); Chris W. Sydow, Becker, MN (US); William M. Blenkush, Becker, MN (US); and Steve J. Wrobel, Roger, MN (US)
Assigned to Graco Minnesota Inc., Minneapolis, MN (US)
Filed by Graco Minnesota Inc., Minneapolis, MN (US)
Filed on Jun. 28, 2023, as Appl. No. 18/215,374.
Application 18/215,374 is a continuation of application No. 17/989,250, filed on Nov. 17, 2022, granted, now 11,732,708.
Application 17/989,250 is a continuation of application No. 17/861,864, filed on Jul. 11, 2022, granted, now 11,530,697, issued on Dec. 20, 2022.
Application 17/861,864 is a continuation of application No. 17/688,360, filed on Mar. 7, 2022, granted, now 11,396,871, issued on Jul. 26, 2022.
Application 17/688,360 is a continuation of application No. 17/325,684, filed on May 20, 2021, granted, now 11,286,926, issued on Mar. 29, 2022.
Application 17/325,684 is a continuation of application No. 16/696,255, filed on Nov. 26, 2019, granted, now 11,035,359, issued on Jun. 15, 2021.
Application 16/696,255 is a continuation of application No. 14/984,212, filed on Dec. 30, 2015, granted, now 10,502,206, issued on Dec. 10, 2019.
Claims priority of provisional application 62/097,806, filed on Dec. 30, 2014.
Claims priority of provisional application 62/097,804, filed on Dec. 30, 2014.
Claims priority of provisional application 62/097,800, filed on Dec. 30, 2014.
Claims priority of provisional application 62/097,791, filed on Dec. 30, 2014.
Int. Cl. F04B 53/14 (2006.01); F04B 53/22 (2006.01); F04B 19/22 (2006.01); F04B 53/16 (2006.01); F15B 15/14 (2006.01); F04B 15/02 (2006.01)
CPC F04B 53/144 (2013.01) [F04B 19/22 (2013.01); F04B 53/147 (2013.01); F04B 53/162 (2013.01); F04B 53/22 (2013.01); F15B 15/1438 (2013.01); F04B 15/02 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A fluid spraying system comprising:
a displacement pump comprising:
a cylinder;
a pump rod at least partially disposed in the cylinder, the pump rod configured to reciprocate within the cylinder along a pump axis to cause the displacement pump to pump fluid;
a drive housing configured to support the displacement pump, wherein the drive housing includes a mounting cavity having a first housing opening open through a bottom side of the drive housing;
a reciprocating drive connectable to the pump rod, the reciprocating drive including:
a connecting rod configured to interface with an eccentric;
a drive link connected to the connecting rod to be reciprocated by the connecting rod, wherein a drive cavity of the drive link receives a head of the pump rod to drive reciprocation of the pump rod, wherein the head of the pump rod interfaces with the drive link within the drive housing;
a tightening ring disposed about the cylinder, the tightening ring including threading, wherein the tightening ring is rotatable about the pump axis and movable axially relative to the pump axis to alternately threadingly tighten and loosen the tightening ring on the drive housing, the tightening ring configured to engage the bottom side of the drive housing to secure the displacement pump to the drive housing; and
wherein the pump rod extends from within the mounting cavity and through the first housing opening of the drive housing with the displacement pump mounted to the drive housing.
 
16. A fluid spraying system comprising:
a displacement pump comprising:
a cylinder;
a pump rod at least partially disposed in the cylinder, the pump rod configured to reciprocate within the cylinder along a pump axis to cause the displacement pump to pump fluid, the pump rod including:
a piston shaft extending out of the cylinder; and
a neck extending from an end of the piston shaft disposed outside of the cylinder; and
a head disposed at an end of the neck opposite the piston shaft, wherein the head is wider than the neck;
a first valve configured to regulate flow of paint into the cylinder;
a second valve supported by the pump rod;
a pump inlet oriented along the pump axis; and
a pump outlet oriented radially relative to the pump axis and formed though the cylinder;
a drive housing configured to support the displacement pump, wherein the drive housing includes a mounting cavity having a first housing opening open through a bottom side of the drive housing;
a reciprocating drive connectable to the pump rod, the reciprocating drive including:
a connecting rod configured to interface with an eccentric and receive a rotational output from the eccentric;
a drive link connected to the connecting rod to be reciprocated by the connecting rod, wherein a drive cavity of the drive link receives the head of the pump rod to drive reciprocation of the pump rod, wherein the head of the pump rod interfaces with the drive link within the drive housing;
a tightening ring disposed about the cylinder, the tightening ring including threading and rotatable about the pump axis and the cylinder and movable axially relative to the cylinder along the pump axis to alternately threadingly tighten and loosen the tightening ring on the drive housing, the tightening ring configured to engage the bottom side of the drive housing to secure the displacement pump to the drive housing;
wherein the pump rod extends from within the mounting cavity and through the first housing opening of the drive housing with the displacement pump mounted to the drive housing;
wherein the displacement pump is configured to mount to the reciprocating drive and is configured to dismount from the reciprocating drive by radial movement of the displacement pump relative to the pump axis; and
wherein the tightening ring is configured to thread into engagement with the drive housing with the head disposed within the drive cavity and the tightening ring is configured to thread out of engagement with the drive housing with the head disposed within the drive cavity.