US3783233A — Welding gun cooling structure and electrode tip r…

Claim 1

Independent Claim 282 words

In a welding gun having a handle portion and a nozzle portion connected to said handle portion by an elongated metal body having an inlet end connected to said handle portion and an outlet end connected to said nozzle portion, said handle portion including means to connect said handle portion to a source of electrical current and a source of shielding gas for supplying electrical current and shielding gas to said nozzle portion through said body, the improvement in said elongated body comprising, a first passage extending longitudinally through said body, means for removably connecting the inlet end of said body to the handle portion to conduct electrical current through the body and conduct shielding gas from said handle portion through the first passage, means at the outlet end of said body to discharge gas and means to conduct electrical current to said nozzle portion, means carried by said body prOviding an outer surface over said body and cooperating therewith to provide at least one second passage between the surface of said body and the means providing the outer surface and extending for a major portion of the length of said body, said at least one second passage being independent of said first passage and having an inner heat transfer surface defined by and forming part of said body, and means providing a first opening at the inlet end of said body and a second opening at the outlet end of said body to define with said at least one second passage a continuous opening to provide cooling of said body and said outer surface by convection air flow through said first and second openings and said at least one second passage.

Claim 2

Dependent Claim 282 words

In a welding gun having a handle portion and a nozzle portion connected to said handle portion by an elongated metal body having an inlet end connected to said handle portion and an outlet end connected to said nozzle portion, said handle portion including means to connect said handle portion to a source of electrical current and a source of shielding gas for supplying electrical current and shielding gas to said nozzle portion through said body, the improvement in said elongated body comprising, a first passage extending longitudinally through said body, means for removably connecting the inlet end of said body to the handle portion to conduct electrical current through the body and conduct shielding gas from said handle portion through the first passage, means at the outlet end of said body to discharge gas and means to conduct electrical current to said nozzle portion, means carried by said body prOviding an outer surface over said body and cooperating therewith to provide at least one second passage between the surface of said body and the means providing the outer surface and extending for a major portion of the length of said body, said at least one second passage being independent of said first passage and having an inner heat transfer surface defined by and forming part of said body, and means providing a first opening at the inlet end of said body and a second opening at the outlet end of said body to define with said at least one second passage a continuous opening to provide cooling of said body and said outer surface by convection air flow through said first and second openings and said at least one second passage.

Claim 3

Dependent Claim 97 words

The gun of claim 1 wherein said at least one second passage comprises a plurality of said second passages between said body and said means providing said outer surface, each of said second passages having said inner heat transfer surface and communicating with the atmosphere through said opening spaced longitudinally of said body to permit air to pass through each of said second passages from one of said openings to the other of said openings in contact with said inner heat transfer surface of said passage to cool said body and said means providing said outer surface.

Claim 4

Dependent Claim 73 words

The gun of claim 2 in which said body is formed with external ribs thereon separated by grooves, and in which said means on said body providing said outer surface of said gun is a tubular member mounted on said body and contacting the outer edges of said ribs, said grooves and said tubular member cooperating to form said second passages, and said inner heat transfer surfaces comprising the surfaces of said grooves.

Claim 5

Dependent Claim 92 words

The gun of claim 1 in which said first passage through said body has internal ribs extending laterally and axially of said body in said passage, and which gun comprises a tubular liner within the space defined by the inner edges of said internal ribs, said liner having a longitudinal opening extending through said liner and providing a third passage through which welding wire may pass in use of said gun, and means for passing said shielding gas through said first passage in the space between said internal ribs and said liner.

Claim 6

Dependent Claim 56 words

The gun of claim 1 wherein said nozzle portion comprises a bushing formed of heat resistant electrically non-conductive material fixed to said outlet end of said body, a shielding sleeve that is demountably held on said bushing, and resilient snap-ring means operating between said bushing and said sleeve to demountably hold said sleeve on said bushing.

Claim 7

Dependent Claim 145 words

A welding gun adapted to be connected to means for supplying gas comprising a rigid elongated body having a passage for gas extending longitudinally through the body, said body having at one end constituting its inlet end means for connecting said body to said means for supplying gas so that gas will pass into and through said passage, said body having at its other end constituting its outlet end a recess in which said passage terminates, a tubular liner in said passage having an end portion of said liner that is spaced from the inner wall of said recess of said body and has radially sprung fingers in said liner end portion, and a welding tip in said recess of said body that is held in place in said recess by press-fit of said radially sprung fingers of said liner outwardly against said welding tip.

Claim 8

Dependent Claim 145 words

A welding gun adapted to be connected to means for supplying gas comprising a rigid elongated body having a passage for gas extending longitudinally through the body, said body having at one end constituting its inlet end means for connecting said body to said means for supplying gas so that gas will pass into and through said passage, said body having at its other end constituting its outlet end a recess in which said passage terminates, a tubular liner in said passage having an end portion of said liner that is spaced from the inner wall of said recess of said body and has radially sprung fingers in said liner end portion, and a welding tip in said recess of said body that is held in place in said recess by press-fit of said radially sprung fingers of said liner outwardly against said welding tip.

Claim 9

Dependent Claim 119 words

The gun of claim 6 in which said liner and said passage are so cross-sectioned that there is a space between the outside of said liner and the inside of said passage through which gas may pass, and in which said welding tip is tubular and said liner extends within said welding tip and is apertured to permit gas to pass from said space in said passage outside of said liner into the inside of said end portion of said liner and from thence into the inside of said welding tip from which it discharges adjacent said outlet end of said body to permit said gas to act as shielding gAs and cooling gas for cooling said welding tip.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-12-31	1977-07-02	1978-01-01	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-12-31	1981-07-02	1982-01-01	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-12-31	1985-07-02	1986-01-01	$7700.00	Window Closed / Lapsed

Welding gun cooling structure and electrode tip retainer

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