Quick connect grease gun barrel and method of use

1. A grease gun comprising:

a body having a reservoir connection aperture including an inner portion, an outer portion and a plurality of concentric grooves disposed to receive a retention fastener positioned along the inner portion;

a grease reservoir in communication with the reservoir connection aperture, the grease reservoir having a groove in a portion of an outside surface of the grease reservoir; and

the retention fastener removably received by first and second concentric grooves, the retention fastener in operational engagement with the first groove to engage and disengage the grease reservoir and in operational engagement with the second groove to removably retain the grease reservoir in the grease gun.

2. The grease gun of claim 1 , wherein the retention fastener further comprises a user operable engagement assembly to adjust the retention fastener to engage and disengage the retention fastener with the grease reservoir groove.

3. The grease gun of claim 2 , wherein the user operable engagement assembly includes a handle.

4. The grease gun of claim 3 , further comprising:

the reservoir connection aperture having a first adjustment slot and a second retention aperture;

the retention fastener having a first end and a second end, the first end removably received in the first adjustment slot and the second end in communication with the second retention aperture; and

the handle in communication with the first end of the retention fastener.

5. The grease gun of claim 4 , further comprising:

the reservoir connection aperture having a third adjustment slot and a fourth retention aperture; and

the retention fastener is removable to allow adaptable engagement between the first adjustment slot and second retention aperture and third adjustment slot and fourth retention aperture.

6. The grease gun of claim 2 , wherein the user operable engagement assembly includes a cam assembly.

7. The grease gun of claim 1 , wherein the grease reservoir is a grease barrel.

8. The grease gun of claim 1 , wherein the concentric grooves comprise an upper channel and a lower channel, the upper and lower channels in operational alignment.

9. The grease gun of claim 8 , wherein the upper channel has a greater diameter than the lower channel.

10. The grease gun of claim 9 , wherein the retention fastener engages the lower channel to retain the grease reservoir.

11. The grease gun of claim 10 , wherein the retention fastener engages the upper channel to enable adjustment of the retention fastener to disengage with the grease reservoir groove.

12. The grease gun of claim 1 , wherein the inner portion of the reservoir connection aperture includes a radial sealing assembly for engagement with the grease reservoir.

13. The grease gun of claim 1 , wherein the grease reservoir groove extends about the entire outside circumference of the grease reservoir.

14. The grease gun of claim 1 , wherein the retention fastener is a snap ring.

15. The grease gun of claim 14 , wherein the snap ring has an inward bias.

16. A method of mounting a barrel to a grease gun comprising:

inserting the barrel into a barrel mount in a grease gun body;

aligning a groove on the barrel with a snap ring having a user operable engagement assembly and movably retained within first and second concentric grooves in the barrel mount;

engaging the snap ring with the groove on the barrel and the first concentric groove during insertion of the barrel; and

engaging the snap ring with the groove on the barrel and the second concentric groove during operation of the grease gun, thereby preventing disengagement of the barrel from the grease gun.

17. The method of claim 16 , wherein the inserting step further comprises manually actuating the user operable engagement assembly.

18. The method of claim 16 , further comprising:

actuating the user operable engagement assembly to move the snap ring from the second to the first concentric grooves and expanding the snap ring to a diameter greater than an outer diameter of the barrel, disengaging the snap ring from the groove on the barrel; and

withdrawing the barrel from the barrel mount in the grease gun body.

19. A grease gun comprising:

a body comprising:

a barrel mount having a first adjustment aperture, a second retention aperture and a recess with an inner portion and an outer portion;

a first groove and a second groove in operational alignment and positioned around the circumference of the inner portion of the barrel mount, the first groove having a diameter greater than the second groove;

a snap ring having a first end, a second end and a retention portion, the first end in communication with the first adjustment aperture, the second end in engagement with the second retention aperture and the retention portion movable within and removably received by the first and second grooves; and

a grease barrel having an outer surface and a slot in a portion of the outer surface, the barrel removably received in the recess of the barrel and the snap ring removably engaged with the slot.

20. The grease gun of claim 19 , wherein the inner portion of the barrel mount includes a radial sealing member for removable engagement with the outer surface of the grease barrel.