Displacement pump mounting and retention

Patent metadata

Field	Value
Publication number	US-11927183-B2
Application number	US-202318231610-A
Country	US
Kind code	B2
Filing date	Aug 8, 2023
Priority date	Dec 30, 2014
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

A fluid spraying system includes a displacement pump configured to mount to a drive housing. A reciprocating drive is connectable to a pump rod of the displacement pump and includes a connecting rod and a drive link that receives a head of the pump rod. A tightening ring that includes threading is configured to rotate about a cylinder of the pump and shift axially along the cylinder and engage with a bottom side of the drive housing to secure the displacement pump to the drive housing.

First claim

The invention claimed is:

1. A method of mounting and dismounting a pump from a drive housing and a driving link, the drive housing having a mounting slot with a forward facing opening through a front of the drive housing, the drive housing further having a bottom and a lower opening extending through the bottom of the drive housing, the driving link located within drive housing, the driving link comprising a drive cavity, the pump comprising a pump cylinder having a top end, the pump further comprising a first ring projecting from the pump cylinder and a second ring projecting from the pump cylinder such that a gap is formed between the first ring and the second ring, and the pump further comprising a pump rod that extends out from the top end of the pump cylinder, the pump rod comprising a head connected to a neck, the head wider than the neck, wherein the method comprises:
mounting the pump to the drive housing by inserting the pump into the mounting slot through the forward facing opening of the drive housing such that the drive housing is received within the gap between the first ring and the second ring and that the head slides into the drive cavity of the driving link;
operating the pump while the pump extends from within the mounting slot down through the lower opening and the neck of the pump rod extends down through the driving link while the head is held by the driving link, and the first ring is disposed within the mounting slot to support the pump while the second ring is disposed outside of the mounting slot and in engagement with the bottom of the drive housing;
removing the pump from the drive housing by sliding the pump out from the mounting slot of the drive housing through the forward facing opening such that the drive housing slides out from the gap and the head slides out from the drive cavity.

2. The method of claim 1 , wherein:
mounting the pump to the drive housing comprises inserting the pump into the forward facing opening of the drive housing with a push motion such that the drive housing is received within the gap between the first ring and the second ring and that the head slides into the drive cavity of the driving link via the push motion, and
removing the pump from the drive housing comprises sliding the pump out from the drive housing through the forward facing opening with a pull motion such that the drive housing slides out from the gap and the head slides out from the drive cavity via the pull motion.

3. The method of claim 1 , wherein mounting the pump to the drive housing further comprises shifting the second ring relative to the pump cylinder to engage the bottom of the drive housing with the second ring.

4. The method of claim 1 , wherein mounting the pump to the drive housing comprises inserting the pump into the forward facing opening of the drive housing such that the first ring is inserted into the mounting slot through the forward facing opening while the second ring remains outside of the drive housing.

5. The method of claim 1 , further comprising:
pivoting a guard to a closed state to cover the forward facing opening.

6. The method of claim 5 , wherein removing the pump from the drive housing further comprises:
pivoting the guard to an open state to uncover the forward facing opening to facilitate removing the pump from the drive housing.

7. The method of claim 1 , wherein the driving link includes a bottom opening, a front opening, and opposed flange ridges, and wherein mounting the pump to the drive housing by inserting the pump into the mounting slot through the forward facing opening of the drive housing includes moving the head through the front opening so that the neck extends down through the bottom opening and the head is head by the opposed flange ridges.

8. The method of claim 7 , wherein mounting the pump to the drive housing by inserting the pump into the mounting slot through the forward facing opening of the drive housing includes moving the head through the front opening so that the neck extends down through the bottom opening and the head is head by the opposed flange ridges and moving the head into the front opening of the drive cavity so that the neck extends downward through the bottom opening includes contacting a contact surface of the driving link with a projection extending upwards from the head.

9. The method of claim 1 , wherein mounting the pump to the drive housing by inserting the pump into the mounting slot through the forward facing opening of the drive housing includes inserting the pump into the mounting slot through the forward facing opening of the drive housing such that an upper portion of the pump cylinder is within the mounting slot while a lower portion of the pump cylinder is exposed outside of the drive housing.

10. The method of claim 1 , wherein the drive housing comprises a flange that extends at least partially around the lower opening, the flange received within the gap between the first ring and the second ring when the pump is inserted into the mounting slot.

11. The method of claim 10 , wherein the flange is U-shaped and open at the forward facing opening.

12. The method of claim 1 , wherein a frame supports the drivee housing, the frame including a plurality of legs, and securing the pump to the drive housing comprises mounting the pump such that the plurality of legs extend below the pump.

13. The method of claim 1 , wherein a fluid dispensing hose is connected to the pump.

14. A method of mounting and dismounting a pump from a drive housing and a driving link, the drive housing having a bottom, the drive housing having a lower opening extending through the bottom of the drive housing and open to a cavity in the drive housing, and the drive housing having a forward facing opening open to the cavity, the driving link located within the drive housing, the driving link comprising a drive cavity, the pump comprising a cylinder comprising a top end, the pump further comprising a first ring projecting from the cylinder and a second ring projecting from the cylinder, and the pump further comprising a pump rod that extends out from the top end of the cylinder, the pump rod comprising a head connected to a neck, the head wider than the neck, wherein the method comprises:
securing the pump to the drive housing such that the pump hangs down from the drive housing by:
moving the pump through the forward facing opening and into the cavity such that the pump is at least partially disposed in the cavity and the pump hangs down through the lower opening, and such that the head of the pump rod extends within the drive housing;
sliding the head laterally into the drive cavity so that the neck extends downward through the driving link; and
sliding the pump cylinder laterally such that a flange of the drive housing is received in a gap formed between the first ring and the second ring; and

removing the pump from the drive housing by:
sliding the pump cylinder laterally such that the flange of the drive housing is withdrawn from the gap;
sliding the head laterally out of the drive cavity; and
withdrawing the pump rod from the drive housing.

Assignees

• Graco Minnesota Inc

Inventors

• Thompson David J
• Lins Christopher A
• Kopel Andrew J
• Davidson Glen W
• Taszarek Chad R
• Sydow Chris W
• Blenkush William M
• Wrobel Steve J

Classifications

• F04B53/147

  Mounting or detaching of piston rod · CPC title

• F04B53/144 Primary

  Adaptation of piston-rods · CPC title

• F04B19/22

  of reciprocating-piston type · CPC title

• F04B53/162

  Adaptations of cylinders · CPC title

• F04B53/22 Primary

  Arrangements for enabling ready assembly or disassembly · CPC title