US 11,891,991 B2
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.
Prior Publication US 2023/0340955 A1, Oct. 26, 2023
Int. Cl. F04B 53/14 (2006.01); F04B 53/22 (2006.01); F04B 19/22 (2006.01); F15B 15/14 (2006.01); F04B 53/16 (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)] 17 Claims
OG exemplary drawing
 
1. A fluid spraying system comprising:
a displacement pump comprising:
a cylinder; and
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, the displacement pump mountable to the drive housing and dismountable from the drive housing, wherein the drive housing includes a mounting cavity having a first housing opening open on a bottom of the drive housing, the first housing opening downward facing;
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, the drive link located within the mounting cavity, 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 on and around the cylinder, the tightening ring rotatable relative to the cylinder, the tightening ring including threading, wherein the tightening ring is rotatable about the cylinder to alternately threadingly tighten and loosen the tightening ring on the drive housing, the tightening ring configured to engage the bottom of the drive housing to secure the displacement pump to the drive housing;
wherein engagement of the tightening ring with the drive housing by rotation of the tightening ring prevents the head from sliding out of the drive cavity while the displacement pump is mounted to the drive housing, and disengagement of the tightening ring from the drive housing releases the head to slide out of the drive cavity for dismounting of the displacement pump from the drive housing; and
wherein the pump rod extends within the mounting cavity and the cylinder extends through the first housing opening of the drive housing while the displacement pump is 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;
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, the displacement pump mountable to the drive housing and dismountable from the drive housing, wherein the drive housing includes a mounting cavity having a first housing opening open on a bottom of the drive housing, the first housing opening downward facing;
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; and
a drive link connected to the connecting rod to be reciprocated by the connecting rod, the drive link including a drive link flange, wherein a drive cavity of the drive link includes a front opening through which the drive link receives the head of the pump rod into the drive cavity so that the drive link flange abuts a lower surface of the head to drive movement of the pump rod along the pump axis, wherein the head of the pump rod interfaces with the drive link within the drive housing; and
a tightening ring disposed on and around the cylinder, the tightening ring including threading, the tightening ring rotatable about the pump axis and the cylinder to alternately threadingly tighten and loosen the tightening ring to the drive housing, the tightening ring configured to engage the drive housing to secure the displacement pump to the drive housing;
wherein the pump rod extends within the mounting cavity and the cylinder extends into the first housing opening of the drive housing while the displacement pump is mounted to the drive housing;
wherein the pump rod is configured to mount to the reciprocating drive by radial movement of the pump rod relative to the pump axis such that the head slides into the front opening of the drive cavity and is configured to dismount from the reciprocating drive by radial movement of the pump rod relative to the pump axis such that the head slides out of the front opening of the drive cavity;
wherein the tightening ring is configured to engage the drive housing while the head is disposed within the drive cavity and the neck extends downward from the head within driving link, and the tightening ring is configured to disengage from the drive housing while the head is disposed within the drive cavity and the neck extends downward from the head within the drive link; and
wherein engagement of the tightening ring with the drive housing by rotation of the tightening ring prevents the head from sliding out of the drive cavity while the displacement pump is mounted to the drive housing, and disengagement of the tightening ring from the drive housing releases the head to slide out of the drive cavity for dismounting of the displacement pump from the drive housing.