Quick connector for hydraulic hose coupling

Patent metadata

Field	Value
Publication number	US-9791079-B2
Application number	US-201514659033-A
Country	US
Kind code	B2
Filing date	Mar 16, 2015
Priority date	Mar 16, 2015
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A hydraulic fluid line coupling system is disclosed. The coupling may include a female fitting, a male fitting, first and second elastomeric seals between the female fitting and male fitting, and a clamp surrounding the female fitting, male fitting, and first and second elastomeric seals.

First claim

What is claimed is:

1. A hydraulic fluid line coupling system, comprising;
a female fitting having a proximal end comprising a recess configured to circumferentially engage an outer circumference of a second fluid line, the female fitting comprising a radially inwardly directed internal shoulder;
a male fitting received with the female fitting having a hose end comprising a recess configured to circumferentially engage an outer circumference of a first fluid line, the male fitting having a tapered rim positioned at a distal end comprising an axial groove configured to receive a face elastomeric seal, the axial groove positioned equidistant between an inner radius and an outer radius of the tapered rim, the face elastomeric seal configured to sealingly compress into the radially inwardly directed internal shoulder; and
a clamp surrounding the female fitting, male fitting, a first elastomeric seal and a second elastomeric seal, wherein the clamp includes first and second clam shell halves hinged together.

2. The hydraulic fluid line coupling system of claim 1 , further including a fastener securing the first and second clam shell halves together.

3. The hydraulic fluid line coupling system of claim 2 , wherein the first and second clam shell halves include first and second radially inwardly directed ribs, the first rib engaging a groove in the male fitting, the second rib engaging a groove in the female fitting.

4. The hydraulic fluid line coupling system of claim 3 , wherein the distal end of the male fitting further includes a circumferential groove receiving a radial elastomeric seal configured to sealingly compress into a sealing end of the female fitting.

5. The hydraulic fluid line coupling system of claim 4 , wherein the clamp forces the face elastomeric seal into compression against the radially inwardly directed internal shoulder of the female fitting.

6. A method of sealing a hydraulic fluid line coupling, comprising:
inserting a male fitting having a hose end comprising a recess configured to circumferentially engage an outer circumference of a first fluid line into a female fitting having a proximal end comprising a recess configured to circumferentially engage an outer circumference of a second fluid line;
sealing the male fitting to the female fitting using first and second elastomeric rings;
securing the male fitting to the female fitting using a clamp; and
further including positioning a first clam shell half of the clamp around the male and female fitting, and then positioning a second clam shell half around the male and female fitting.

7. The method of claim 6 , further including positioning the first elastomeric ring radially between the male fitting and female fitting.

8. The method of claim 7 , further including positioning the second elastomeric ring axially between the male fitting and the female fitting.

9. The method of claim 6 , further including connecting the first and second clam shell halves around the male and female fittings using a hinge and a fastener.

10. The method of claim 9 , further including providing the fastener in the form of a threaded bolt.

11. The method of claim 6 , further including radially inwardly extending ribs from a first clam shell halve and a second clam shell halve, and inserting the ribs into grooves in the male fitting and female fittings.

12. The method of claim 9 , further including drawing the male fitting into the female fitting by tapering a distal end of the male fitting.

13. A machine, comprising;
a chassis;
an engine mounted on the chassis;
a hydraulic fluid pump powered by the engine;
a hydraulic cylinder in fluid communication with the hydraulic fluid pump;
a plurality of hydraulic fluid tubes connecting the hydraulic fluid pump and the hydraulic cylinder; and
a hydraulic fluid line coupling system connecting the plurality of hydraulic fluid tubes together, each hydraulic fluid line coupling system including a male fitting having a hose end comprising a recess configured to circumferentially engage an outer circumference of a first fluid line, the male fitting having a tapered rim, the tapered rim comprising an axial groove configured to receive a face elastomeric seal, the face elastomeric seal configured to sealingly compress into a radially inwardly directed internal shoulder of a female fitting, the distal end comprising a circumferential groove configured to receive a radial elastomeric seal, the radial elastomeric seal configured to sealingly compress into a sealing end of the female fitting, the female fitting having a proximal end comprising a recess configured to circumferentially engage an outer circumference of a second fluid line,
and a hinged clamp securing the female fitting, male fitting, the face elastomeric seal, and the radial elastomeric seal together.

14. The machine of claim 13 , wherein the clamp includes first and second clam shell halves hinged together and secured with a threaded bolt.

Assignees

• Caterpillar Inc

Inventors

• Considine Jr Patrick E
• Rempert Carl H

Classifications

• F16L21/08 Primary

  with additional locking means (F16L21/06 takes precedence; couplings of the quick-acting type F16L37/00) · CPC title

• F16L21/035 Primary

  placed around the spigot end before connection ({F16L21/022,} F16L21/025 take precedence) · CPC title

• F16L21/065

  tightened by tangentially-arranged threaded pins · CPC title