Method for forming a long-life thermal crack resistant trap

Details Method for forming a long-life thermal crack resistant trap Method for forming a long-life thermal crack resistant trap

1976-12-17

1978-03-14

Lanham, C.W.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29DIG26, B23P 1300, B23P 1500

Patent

active

040782891

ABSTRACT:
A method for forming a long-life gas trap comprises basically (a) machining an elongated solid element in a cruciform cross-sectional shape from mill stock for forming a housing with four arms, (b) machining each arm to a square cross-section with four flat surfaces thereon, (c) boring a hole centrally and longitudinally of the housing for forming an elongated chamber having a longitudinal axis, (d) boring a hole parallel to the elongated chamber in each of the four arms of the cruciform shaped housing contiguous to the elongated chamber for forming four tubes contiguous with the four sides of the elongated chamber, and (e) bending the ends of at least four of the tubes with a bending fixture having a roller to a position normal to the longitudinal axis for forming a gas trap that has longer life because of the high resistance to cracking due to continuously alternating between thermal expansion and contraction.

REFERENCES:
patent: 2210744 (1940-08-01), Winder
patent: 2309666 (1943-02-01), Parker
patent: 2324707 (1943-07-01), Johnson
patent: 2755506 (1956-07-01), Weber
patent: 2778609 (1957-01-01), Peeps
patent: 3243873 (1966-04-01), Steel
patent: 3264803 (1966-08-01), Read
patent: 3476869 (1969-11-01), Hawkins
patent: 3626671 (1971-12-01), Ebeling, Jr.
patent: 3734293 (1973-05-01), Biskis
patent: 3886638 (1975-06-01), Hayman et al.

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