A fluid coupling having an outer housing with an internal bore, an O-ring fitted within the bore, a spacer bushing fitted against the O-ring, a gripper ring fitted against the axially outer side of the spacer ring, the gripper ring having axially and radially inwardly protruding circumferentially sp
A fluid coupling having an outer housing with an internal bore, an O-ring fitted within the bore, a spacer bushing fitted against the O-ring, a gripper ring fitted against the axially outer side of the spacer ring, the gripper ring having axially and radially inwardly protruding circumferentially spaced gripping teeth, the teeth arranged for providing a twist when subjected to simultaneous rearward axial and rotational forces, and an end bushing holding the gripper ring, spacer bushing, and O-ring within the outer housing. A fluid coupling having an outer housing with an internal bore, an O-ring seal fitted within the bore, a spacer bushing fitted against the seal, a first gripper ring fitted against the axially outer side of the spacer ring, a second gripper ring fitted against the O-ring seal, the gripper rings having axially and radially inwardly protruding circumferentially spaced gripping teeth, in one embodiment the teeth arranged for providing a twist when subjected to simultaneous rearward axial and rotational forces, and an end bushing holding the gripper rings, spacer bushing, and O-ring within the outer housing.
대표청구항▼
1. A fluid conduit coupling for removably holding therein a tube having a compression ring thereon without removing the compression ring comprising:an outer housing having an internal bore with a circumferential side wall, a seal support surface in said bore, a seal engaged in said support surface,
1. A fluid conduit coupling for removably holding therein a tube having a compression ring thereon without removing the compression ring comprising:an outer housing having an internal bore with a circumferential side wall, a seal support surface in said bore, a seal engaged in said support surface, at least one spacer bushing retaining said seal in said support surface, said spacer bushing having an axially inner side and an axially outer side, a gripper ring having radially and axially inwardly protruding circumferentially spaced gripper teeth having inner edges protruding inwardly into said internal bore, said gripper ring lying axially outward from said seal, and an end bushing attached to said outer housing to secure said spacer bushing in said internal bore, said end bushing having an axially outward recess sized to receive the compression ring therein. 2. The coupling of claim 1, said gripper ring lying against the axially inner side of the spacer bushing and against the seal.3. The coupling of claim 1 including a second gripping ring lying against the axially outer side of said spacer brushing.4. The coupling of claim 1 wherein said end bushing is welded to said outer housing.5. The coupling of claim 1, wherein said recess of said end bushing has a inwardly tapering surface, whereby the compression ring is left intact on the tube and the tube is pushed into the coupling until the tube passes said seal and the compression ring abuts the inwardly tapering surface of said end bushing.6. A fluid conduit coupling comprising:an outer housing having an internal bore with a circumferential side wall, a seal in said bore, a spacer bushing having an axially inner side and an axially outer side, a first gripper ring having radially and axially inwardly protruding circumferentially spaced gripper teeth having inner edges protruding inwardly into said internal bore, said first gripper ring lying adjacent said axially inner side of said spacer bushing, said teeth protruding into said bore for holding a tube against axial movement, said first gripper ring mounted against rotation, a second gripper ring having radially and axially inwardly protruding circumferentially spaced gripper teeth having inner edges protruding inwardly into said internal bore, said second gripper ring lying adjacent said axially outer side of said spacer bushing, said teeth protruding into said bore for holding the tube against axial movement, said second gripper ring mounted against rotation, and said spacer bushing and first and second gripper rings being held in said internal bore. 7. The coupling of claim 6, further including another spacer bushing axially positioned between said seal and said first gripper ring, and retaining said seal in said internal bore.8. A conduit coupling for removably holding a tube therein comprising:an outer housing having an internal bore with a circumferential side wall; a spacer bushing in said internal bore and having an axially inner side and an axially outer side; and a first gripper ring in said internal bore and having radially and axially inwardly protruding circumferentially spaced gripper teeth having inner edges protruding inwardly into said internal bore, said first gripper ring lying adjacent said axially outer side of said spacer bushing, said first gripper ring held in said outer housing to preclude rotational movement of said first gripper ring, said spacer bushing having circumferentially spaced grooves and said gripper teeth of said first gripper ring being aligned and fitted within said grooves. 9. The coupling of claim 8 further including a seal in said internal bore, said seal positioned axially inward of said spacer bushing.10. The coupling of claim 9 wherein said axially inner side of said spacer bushing engages said seal.11. The coupling of claim 9 further including a second gripper ring in said internal bore positioned axially inward of said spacer bushing and axially outward of said seal, said second gripper ring having radially inwardly protruding circumferentially spaced gripper teeth having inner edges protruding inwardly into said internal bore.12. The coupling of claim 11, said second gripper ring lying against said axially inner side of said spacer bushing and adjacent said seal.13. The coupling of claim 8 further including a second gripper ring in said internal bore lying adjacent said axially inner side of said spacer bushing, said second gripper ring having radially inwardly protruding circumferentially spaced gripper teeth having inner edges protruding inwardly into said internal bore.14. The coupling of claim 8 further including a second gripper ring in said internal bore positioned axially inward of said first gripper ring, said first and second gripper rings having said spacer bushing therebetween, said second gripper ring having radially inwardly protruding circumferentially spaced gripper teeth having inner edges protruding inwardly into said internal bore.15. The coupling of claim 8 further including a second gripper ring in said internal bore positioned axially outward of said first gripper ring with another spacer bushing therebetween, said second gripper ring having radially inwardly protruding circumferentially spaced gripper teeth having inner edges protruding inwardly into said internal bore.16. The coupling of claim 15 wherein said another spacer bushing has circumferentially spaced grooves, and said gripper teeth of said second gripper ring are aligned and fitted within said grooves of said another spacer bushing.17. The coupling of claim 15 further including a spacer positioned axially outward of said second gripper ring.18. The coupling of claim 15 further including a third gripper ring in said internal bore positioned axially inward of said first gripper ring, said first and third gripper rings being separated by said spacer bushing, said third gripper ring having radially inwardly protruding circumferentially spaced gripper teeth having inner edges protruding inwardly into said internal bore.19. The coupling of claim 18 further including a seal in said internal bore, said seal positioned axially inward of said third gripper ring.20. The coupling of claim 8 further including an end bushing attached to said outer housing to secure said spacer bushing in said internal bore.21. The coupling of claim 20 wherein said internal bore has circumferentially spaced inner ribs, and said end bushing has circumferentially spaced tube guide ribs.22. The coupling of claim 20 wherein said end bushing is attached to said outer housing by a weld.23. The coupling of claim 8 wherein said first gripper ring has a flat on its circumference, said spacer bushing has a flat on its circumference, and said flats engage a mating flat protrusion in said internal bore of said outer housing.24. The coupling of claim 8 wherein said gripper teeth of said first gripper ring are sufficiently flexible to twist when subjected to simultaneous axial outward directed and rotational force to allow the unscrewing and removal of the tube inserted into the coupling.25. The coupling of claim 8 wherein said gripper teeth of said first gripper ring have a permanent twist to allow the unscrewing and removal of the tube inserted into the coupling.26. The coupling of claim 8 wherein said grooves cause friction on one edge of said gripper teeth allowing said gripper teeth to twist and the tube inserted into the coupling to be unscrewed and removed from the coupling.27. The coupling of claim 8 for use with a tube having a compression ring thereon without removing the compression ring, further including an end bushing attached to said outer housing to secure said spacer bushing in said internal bore, said end bushing having an axially outward recess sized to receive the compression ring therein.28. The coupling of claim 27 said recess of said end bushing has an inwardly tapered surface.29. The coupling of claim 27 further including a seal in said internal bore, said seal positioned axially inward of said spacer bushing.30. The coupling of claim 29 further including a second gripper ring in said internal bore positioned axially inward of said spacer bushing and axially outward of said seal, said second gripper ring having radially inwardly protruding circumferentially spaced gripper teeth having inner edges protruding inwardly into said internal bore.31. The coupling of claim 30, said second gripper ring lying against said axially inner side of said spacer bushing and adjacent said seal.32. The coupling of claim 8 wherein said teeth having a twist when subjected to an axial outwardly directed and rotational force for allowing the unscrewing and removal of a tube inserted in said coupling.33. The coupling of claim 8 wherein said spacer bushing is held in said outer housing to preclude rotational movement of said spacer bushing.
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