Quick connector for hydraulic hose coupling

Patent metadata

Field	Value
Publication number	US-2016273685-A1
Application number	US-201514658932-A
Country	US
Kind code	A1
Filing date	Mar 16, 2015
Priority date	Mar 16, 2015
Publication date	Sep 22, 2016
Grant date	—

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 twist nut surrounding the female fitting, male fitting, and first and second elastomeric seals.

First claim

1 . A hydraulic fluid line coupling system, comprising;
a female fitting comprising: a cylindrical inner wall, a shoulder, a hexagonally shaped flange, a cylindrical extension extending from the hexagonally shaped flange, and a plurality of angled grooves in the cylindrical extension, each angled groove including a longitudinal leg and a lateral leg; a male fitting received in the female fitting, the male fitting comprising: a radially outwardly directed rib having a plurality of circumferentially spaced gaps, a radial groove, and an axial groove; a first elastomeric seal received in the radial groove of the male fitting and positioned between the female fitting and the male fitting, the first elastomeric seal engaging the cylindrical inner wall of the female fitting; a second elastomeric seal received in the axial groove of the male fitting and positioned between the female fitting and the male fitting, the second elastomeric seal engaging the shoulder of the female fitting; and a twist nut securing the female fitting to the male fitting, the twist nut including a hexagonally shaped outer surface and a plurality of radially inwardly directed tabs, wherein the plurality of radially inwardly directed tabs on the twist nut are sized so as to be slidable through the gaps in the male fitting rib and plurality of angled grooves in the female fitting.

2 - 10 . (canceled)

11 . The hydraulic fluid line coupling system of claim 1 , wherein the twist nut further includes a radially inwardly directed shoulder.

12 . The hydraulic fluid line coupling system of claim 11 , wherein the lateral legs hold the second elastomeric seal against the shoulder of the female fitting, and the radially inwardly directed shoulder of the twist nut against the radially outwardly directed rib of the male fitting.

13 . The hydraulic fluid line coupling system of claim 12 , wherein each of the plurality of radially inwardly directed tabs are axially slidable into one of the longitudinal legs of the plurality of angled grooves, and rotationally translatable into one of the lateral legs of the plurality of angled grooves.

14 . The hydraulic fluid line coupling system of claim 13 , further including at least one lock pin extending through the female fitting and twist nut.

15 . A method of sealing a hydraulic fluid line coupling system as described in claim 1 , comprising:
inserting the male fitting into the female fitting; sealing the male fitting to the female fitting using the first and second elastomeric rings there between; and securing the female fitting to the male fitting using the twist nut.

16 . The method of claim 15 , further including positioning the first elastomeric ring radially between the male fitting and the female fitting.

17 . The method of claim 16 , further including positioning the second elastomeric ring axially between the male fitting and the female fitting.

18 . The method of claim 15 , further including and further including axially sliding the plurality of tabs into the plurality of angled grooves, and then rotating the twist nut such that the plurality of tabs rotationally translate within the plurality of angled grooves.

19 . The method of claim 18 , further including locking the twist nut to the female fitting using at least one locking pin.

20 . 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 as recited in claim 1 connecting the plurality of hydraulic fluid tubes together.

21 . (canceled)

22 . The machine of claim 21 , wherein further including at least one locking pin locking the female fitting to the twist nut.

23 . (canceled)

Assignees

• Caterpillar Inc

Inventors

• Considine Patrick E
• Rempert Carl H

Classifications

• F16L21/08

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

• F16L19/00 Primary

  Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts (F16L17/00 takes precedence; if using bolts or equivalent connecting means F16L23/00; connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics F16L47/00 {; specially adapted for pipes of brittle material F16L49/06}) · CPC title

• F16L21/035

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

• F16L37/113 Primary

  the male part having lugs on its periphery penetrating into the corresponding slots provided in the female part · CPC title

• F16L2201/20

  Safety or protective couplings · CPC title