ApplicationNo. 629648 filed on 11/06/1975
US Classes:72/38, WITH EXPOSURE OF WORK TO GAS, VAPOR, MIST, OR MODIFIED ATMOSPHERE72/302, Substantially direct approach or recession (e.g., stretching)72/342.5, And heating of work72/378By application of tensile forces
ExaminersPrimary: Larson, Lowell A.
Attorney, Agent or Firm
AbstractA process of manufacture to produce low cost pressure vessels from a length of metal tubing by use of localized heat and/or axial tensile force to shrink the diameter of the tubing at selected locations of a predetermined starting length approximately one diameter long and many diameters apart to permit subsequent separation to form open-ended pressure vessels. Subsequent conventional swaging operations could thicken and reduce the end diameters so they can be threaded.