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US 7,743,897 B2Granted
Rod assembly weld
AssigneeTenneco Automotive Operating Company Inc.
InventorLuc Knevels
Life of this patent
Estimating the term…
Abstract
A shock absorber includes a welded piston rod assembly. The piston rod assembly comprises an upper piston rod portion welded to a lower piston rod portion and a dirt shield welded to both of the upper piston rod portion and the lower piston rod portion using a single weld.
Claims20
A shock absorber comprising:
- a pressure tube defining a working chamber;
- a piston assembly disposed within said working chamber, said piston assembly dividing said working chamber into an upper working chamber and a lower working chamber;
- a piston rod assembly attached to said piston assembly, said piston rod assembly extending from said piston assembly through one end of said pressure tube, said piston rod assembly comprising:
- an upper piston rod portion;
- a lower piston rod portion attached to said upper piston rod portion;
- a dirt shield attached to said upper piston rod portion and said lower piston rod portion;
- a first weld attaching only said upper piston rod portion to said lower piston rod portion;
- and
- a second single weld covering the first weld and simultaneously attaching said dirt shield to both said upper piston rod portion and said lower piston rod portion and attaching said upper piston rod portion to said lower piston rod portion.
6 more elements
A method for manufacturing a piston rod assembly comprising:
- creating a first weld by welding only an upper piston rod to a lower piston rod a first time;
- assembling a dirt shield to the upper piston rod and the lower piston rod after creating the first weld;
- creating a second weld covering said first weld and simultaneously welding the dirt shield to said upper piston rod and said lower piston rod and welding said upper piston rod to said lower piston rod a second time.
Dependencies are inferred from the claim text.