Resistance welding machine
Patent 4393293 Issued on July 12, 1983. Estimated Expiration Date: 
April 24, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 24, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 460232 1339084 1600961 1807166 2539782 3285680 InventorsAssigneeApplicationNo. 06/257171 filed on 04/24/1981US Classes:219/90, Plier or tong type384/276Specified sleeve or linerExaminersPrimary: Goldberg, Elliot A.Attorney, Agent or FirmInternational ClassB23K 11/36 (20060101)Foreign Application Priority Data1980-05-13 JPAbstractThe resistance welding machine of this invention has an arm carrying a movable electrode and provided with a supporting bore, a power receiving bushing fitted in the supporting bore, and a power feeding shaft mounted on the main body of the welding machine on which a second electrode, is also mounted. The power feeding shaft is received by the bore of the power receiving bush to support the arm while supplying electric power to the movable electrode. A plurality of grooves are formed in the inner peripheral surface of the power receiving bushing to receive powders generated as a result of local wear due to sliding contact between the power feeding shaft and the power receiving bushing. The grooves are filled with grease which adsorbs and holds the powders. | |
