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US 5,705,784 AGranted
Electrode for electric resistance welding
OwnerYoshitaka Aoyama, Shoji Aoyamainventors
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OwnerYoshitaka Aoyama, Shoji Aoyamainventors
Estimating the term…
An electrode for electric resistance welding comprises a guide hole of a circular cross-section composed of a small-diameter hole and a large-diameter hole, a guide pin composed of a small-diameter portion and a large-diameter portion, the small-diameter portion and larger-diameter portion of the guide pin being fitted into the small-diameter hole and large-diameter hole of the guide hole, respectively, so that when the guide pin is pushed down, compressed air is allowed to jet out of a gap between the small-diameter hole and the small-diameter portion. The large-diameter portion of the guide pin is firmly fitted into the guide hole, with an air passage formed in the outer circumference of the large-diameter portion and the end surface of the large-diameter portion seated on the inner end surface of the large-diameter hole.
An electrode for electric resistance welding, comprising a guide hole of a circular cross-section composed of a small-diameter hole and a large-diameter hole, a guide pin composed of a small-diameter portion and a large-diameter portion, the small-diameter portion and larger-diameter portion of the guide pin being fitted into the small-diameter hole and large-diameter hole of the guide hole, respectively, so that when the guide pin is displaced relative to the guide hole, compressed air introduced from a port formed in the electrode is allowed to jet out of a gap between the small-diameter hole and the small-diameter portion, wherein the large-diameter portion of the guide pin is firmly fitted into the large-diameter hole to form a guide portion, an end surface of the guide portion and an inner end surface of the large-diameter hole coming in contact with each other, and wherein an air passage is formed in the guide portion in the axial direction of the guide pin.
A welding electrode for fusion-welding a part to a mating plate-form part, having a guide pin retained in a guide hole formed therein, said guide pin comprising a metal-made guide member adapted to pass through an opening in the plate form part and a non-metallic seal member integral with the guide member, wherein the seal member is composed of a cylindrical protective part larger in diameter than the guide member, a cylindrical base part larger in diameter than the protective part, and a conical part connecting the protecting part and the base part, ventilation gaps being formed between the protective part and the guide hole and between the base part and the guide hole, respectively.
Dependencies are inferred from the claim text.