Manufacture of pistons incorporating a thermal barrier

Details Manufacture of pistons incorporating a thermal barrier Manufacture of pistons incorporating a thermal barrier

1977-05-26

1978-10-17

Mehr, Milton S.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

295275, 123 4116, 123 4135, 123193CP, 92176, 164 75, 164DIG8, B23P 1510

Patent

active

041200810

ABSTRACT:
A piston incorporating a thermal barrier is produced by first making an annular piston ring carrier insert from steel. The insert comprises an annular body to the upper and lower radially-inner edges of which are secured the upper and lower edges of an annular element which is channel shaped in radial cross-section and the channel in which faces radially outward. The element is soldered or welded to the insert body so that an enclosed annular space is defined between the element and body. The insert thus formed is then heated in molten aluminium to "alfinize" its external surface. The treated insert is subsequently placed in a piston mold and the piston is molded about it from aluminium.

REFERENCES:
patent: 1390193 (1921-09-01), Bowmar
patent: 2865348 (1958-12-01), Kramer
patent: 2893083 (1959-07-01), Ladd
patent: 3616729 (1971-11-01), Fischer
patent: 3628511 (1971-12-01), Fischer

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