Current carrying reciprocable fluid motor

Details Current carrying reciprocable fluid motor Current carrying reciprocable fluid motor

1978-11-29

1981-04-07

Goldberg, Elliot A.

Electric heating

Metal heating

For bonding with pressure

219 89, 339 9R, B23K 1110, H01R 4100

Patent

active

042608686

ABSTRACT:
Means are shown for carrying current within the moving members of a reciprocable fluid motor such as is used to operate a welding gun. The current is transmitted from a cable to the piston rod through a stationary contactor having a portion secured to the cylinder housing and circumferentially arranged leaves held by a spring against the piston rod surface. The seal construction is such as to permit the use of lubricants on the sliding contact surface and at the same time prevent cooling water for entering the lubricating reservoir. The external contactor permits use of a hollow type piston rod allowing cooling water to be carried therethrough if desired. When used for welding gun applications the invention eliminates the need for flexible type shunts and separate electrode holders along with flexible water hoses in the welding area. The invention may also be utilized for lower power applications such as sensing devices.

REFERENCES:
patent: 2004620 (1935-06-01), Tarbox
patent: 2293338 (1942-08-01), Harris
patent: 2318024 (1943-05-01), Strickland, Jr.
patent: 2810893 (1957-10-01), Nijland
patent: 2863983 (1958-12-01), Kane et al.
patent: 2923908 (1960-02-01), Cejka
patent: 2980788 (1961-03-01), Hunter et al.
patent: 3287538 (1966-11-01), Dicks
patent: 3538294 (1970-11-01), Dicks et al.

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