Integral mounting system on axial reciprocating pumps

Patent metadata

Field	Value
Publication number	US-10077771-B2
Application number	US-201514984430-A
Country	US
Kind code	B2
Filing date	Dec 30, 2015
Priority date	Dec 30, 2014
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

A displacement pump includes a pump rod having a load concentrating feature extending from the head of the pump rod. The head of the pump rod is received within a slot of a drive link, and the drive link is configured to contact the load concentrating feature. Having the drive link contact the smaller diameter load concentrating feature reduces the misalignment between the driving force and the center of the pump rod and thereby reduces side-loading experienced by the pump rod. The displacement pump is configured to be used in a fluid dispensing system.

First claim

The invention claimed is:

1. A displacement pump comprising:
an intake housing valve having a first intake and a first discharge;
a pump cylinder having an axis, the pump cylinder comprising:
a second intake, a second discharge, and a driving opening, wherein the second intake is secured to the first discharge; and

a clamp disposed about the pump cylinder, the clamp configured to secure the displacement pump to a housing, wherein the clamp comprises:
a static support member disposed on an exterior of the pump cylinder; and
a movable support member disposed about an exterior of the pump cylinder and movable along the axis relative to the exterior of the pump cylinder.

2. The displacement pump of claim 1 , and further comprising:
a pump rod disposed within the pump cylinder and extending through the driving opening, the pump rod comprising:
a shaft having a first end and a second end; and
a head attached to the first end.

3. The displacement pump of claim 2 , wherein the first end of the pump rod further comprises:
a neck extending between and connecting the head and the shaft, wherein a neck width is smaller than a head width.

4. The displacement pump of claim 2 , wherein the pump rod further comprises:
a load concentrating feature projecting from a top of the head, wherein a load concentrating feature area is smaller than a head area.

5. The displacement pump of claim 4 , wherein the load concentrating feature comprises a cylindrical projection.

6. The displacement pump of claim 1 , wherein:
the static support member comprises an axial ring disposed on an exterior of the pump cylinder; and
the movable support member comprises a tightening ring disposed about an exterior of the pump cylinder.

7. The displacement pump of claim 6 , wherein the tightening ring is disposed on the pump cylinder below the axial ring.

8. The displacement pump of claim 6 , wherein the tightening ring includes a plurality of projections extending from an exterior wall of the tightening ring.

9. The displacement pump of claim 6 , wherein an exterior wall of the pump cylinder includes exterior threading and the tightening ring includes interior threading, the interior threading configured to engage the exterior threading such that the tightening ring is rotatable about the pump cylinder.

10. A fluid dispensing system comprising:
a frame;
a motor housing connected to the frame, wherein a motor is mounting within the motor housing;
a drive housing mounted to the motor housing, the drive housing comprising:
an upper portion;
a lower portion integral with the upper portion;
a mounting cavity extending into the lower portion; and
a first U-shaped flange extending from a lower edge of the mounting cavity and into the mounting cavity;
wherein the mounting cavity is open at a front of the lower portion and at a bottom of the lower portion;

a reciprocating drive mounted within the drive housing, the reciprocating drive driven by the motor;
a displacement pump mounted to the drive housing and partially disposed within the mounting cavity; and
a clamp disposed about the displacement pump, wherein the clamp engages the first U-shaped flange to secure the displacement pump within the mounting cavity.

11. The fluid dispensing system of claim 10 , wherein the clamp further comprises:
an axial ring mounted on the displacement pump; and
a tightening ring mounted on the displacement pump, wherein a gap is formed between the axial ring and the tightening ring; and
wherein the first U-shaped flange is received within the gap.

12. The fluid dispensing system of claim 11 , wherein the tightening ring is mounted on the displacement pump below the axial ring, and wherein the tightening ring is disposed below the drive housing and the axial ring is disposed within the mounting cavity when the first U-shaped flange is received within the gap.

13. The fluid dispensing system of claim 11 , wherein the tightening ring includes internal threading and the displacement pump includes external threading such that the tightening ring is rotatable about the displacement pump.

14. The fluid dispensing system of claim 11 , wherein:
the first U-shaped flange includes a first protrusion extending from an exterior edge of the first U-shaped flange; and
the tightening ring further comprises an aligning cone;
wherein the first protrusion is received by the aligning cone to secure the displacement pump to the drive housing.

15. The fluid dispensing system of claim 10 , wherein the displacement pump further comprises:
a pump rod disposed within and extending out of the displacement pump, the pump rod comprising:
a shaft having a first end and a second end; and
a head attached to the first end.

16. The fluid dispensing system of claim 15 , wherein the pump rod further comprises:
a load concentrating feature projecting from a top of the head.

17. The fluid dispensing system of claim 16 , wherein a load concentrating feature area is smaller than a head area.

18. The fluid dispensing system of claim 16 , wherein the load concentrating feature is a cylindrical projection.

19. The fluid dispensing system of claim 15 , wherein the reciprocating drive further comprises:
a connecting rod, the connecting rod disposed within the upper portion of the drive housing and connected to a crank of the motor; and
a drive link attached to and driven by the connecting rod, the drive link extending into the lower portion of the drive housing, wherein the drive link receives the head of the pump rod.

20. The fluid dispensing system of claim 19 , wherein the drive link further comprises:
a body having a top edge and a bottom edge;
a drive opening extending into the top edge, the connecting rod extending into secured within the drive opening;
a drive cavity extending laterally into the bottom edge, wherein the drive cavity comprising:
a forward facing opening;
a lower opening; and
a contact surface disposed opposite the lower opening.

21. The fluid dispensing system of claim 20 , wherein the drive link further comprises:
a second U-shaped flange extending about a lower opening of the drive cavity and extending into the drive cavity.

22. The fluid dispensing system of claim 21 , wherein a top edge of the second U-shaped flange abuts a lower edge of the head.

23. The fluid dispensing system of claim 22 , wherein the second U-shaped flange extends about a neck, the neck extending between and connecting the head and the shaft.

24. The fluid dispensing system of claim 19 , wherein the drive link further comprises:
a load concentrating feature projecting from the contact surface and into the drive cavity, wherein the load concentrating feature is aligned with a centerline of the drive link.

25. A method of installing a displacement pump, the method comprising:
aligning an axial ring with a drive housing cavity;
inserting the displacement pump in the drive housing such that a drive housing flange is disposed within a gap between the axial ring and a tightening ring; and
rotating the tightening ring such that the tightening ring and the axial ring exert a clamping force on the drive housing flange.

26. The method of claim 25 , wherein the step of inserting the displacement pump in the drive housing further comprises:
inserting the axial ring into the drive housing cavity such that the axial ring is disposed withi

Assignees

• Graco Minnesota Inc
• Graco Minnesota Inc

Inventors

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

Classifications

• F04B15/02

  the fluids being viscous or non-homogeneous · CPC title

• F04B53/162

  Adaptations of cylinders · CPC title

• F04B53/144 Primary

  Adaptation of piston-rods · CPC title

• F04B19/22

  of reciprocating-piston type · CPC title

• F04B53/22 Primary

  Arrangements for enabling ready assembly or disassembly · CPC title