Patent ID: 11891991
Assignee: GRACO MINNESOTA INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
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.