Seal installation tool

1. A tool for installing a seal in a fitting, said tool comprising:

a sleeve having a first socket sized to receive said seal, and a second socket positioned adjacent to said first socket, said second socket defining an open end of said sleeve and being sized to receive said fitting;

a pusher element movable within said sleeve, said pusher element having a contact surface engageable with said seal for moving said seal out of said first socket and into said fitting when said pusher element is moved relatively to said sleeve, and said pusher element comprises a shaft having said contact surface at one end thereof, wherein said shaft has a conduit therein, and said conduit having an inlet positioned at said one end providing fluid communication with said fitting, and an outlet providing fluid communication with the atmosphere to allow gas to escape from said fitting to the atmosphere when said second socket is engaged with said fitting.

2. A tool according to claim 1 , further comprising a handle attached to said shaft in spaced relation to said sleeve.

3. A tool according to claim 2 , further comprising a biasing element positioned between said sleeve and said handle, said biasing element biasing said sleeve in a direction away from said handle.

4. A tool according to claim 3 , wherein said biasing element comprises a compression spring acting between said sleeve and said handle.

5. A tool according to claim 1 , wherein said outlet is positioned at another end of said shaft.

6. A tool according to claim 1 , further comprising a handle attached to said shaft in spaced relation to said sleeve, said outlet being positioned between said handle and said sleeve.

7. A tool for installing a seal into a fitting of a tank holding a pressurized gas while said gas is flowing through said fitting, said tool comprising:

a sleeve having a first socket sized to coaxially receive and hold said seal, and a second socket positioned adjacent to said first socket and co-axial therewith, said second socket having a larger diameter than said first socket and defining an open end of said of said sleeve, said second socket being sized to coaxially receive said fitting;

a shaft axially movable within said sleeve, said shaft having a contact surface at one end engageable with said seal for moving said seal out of said first socket and into said fitting when said pusher element is moved axially relatively to said sleeve;

a conduit extending through said shaft, said conduit having an inlet positioned at said one end providing fluid communication with said fitting, and an outlet providing fluid communication with the atmosphere, said gas flowing through said conduit to the atmosphere when said second socket is engaged with said fitting.

8. A tool according to claim 7 , wherein said outlet is positioned at another end of said shaft.

9. A tool according to claim 7 , further comprising a handle attached to said shaft in spaced relation away from said sleeve.

10. A tool according to claim 9 , wherein said outlet is positioned on said shaft between said sleeve and said handle.

11. A tool according to claim 9 , further comprising a biasing element positioned between said handle and said sleeve for biasing said sleeve in a direction away from said handle.

12. A method of installing a seal in a fitting through which gas is flowing, said method comprising:

providing a sleeve having a first socket to hold said seal and a second socket, adjacent to said first socket, to receive said fitting;

providing a pusher element movable within said sleeve for pushing said seal from said sleeve into said fitting, said pusher element having a conduit with an inlet

positioned within said sleeve and an outlet in fluid communication with the atmosphere;

positioning a seal within said first socket;

engaging said second socket with said fitting;

moving said pusher element relatively to said sleeve to engage and push said seal from said first socket into said fitting; and

permitting said gas to flow from said fitting through said sleeve, through said conduit, and out to the atmosphere.

13. A tool for installing a seal into a fitting of a tank holding a pressurized gas, said tool comprising:

a sleeve having a first socket sized to coaxially receive and hold said seal, and a second socket positioned adjacent to said first socket and co-axial therewith, said second socket having a larger diameter than said first socket and defining an open end of said sleeve, said second socket being sized to coaxially receive said fitting;

a shaft axially movable within said sleeve, said shaft having a contact surface at one end engageable with said seal for moving said seal out of said first socket and into said fitting when said shaft is moved relatively to said sleeve, wherein said shaft has a conduit therein, and said conduit having an inlet positioned at said one end providing fluid communication with said fitting, and an outlet providing fluid communication with the atmosphere when said second socket is engaged with said fitting to allow said gas to escape from said fitting to the atmosphere;

a handle attached to said shaft in spaced relation away from said sleeve;

a biasing element positioned between said handle and said sleeve for biasing said sleeve in a direction away from said handle.

14. A tool according to claim 13 , wherein said outlet is positioned at another end of said shaft.

15. A tool according to claim 13 , wherein said outlet is positioned on said shaft between said sleeve and said handle.