Manufacture of pistons

Details Manufacture of pistons Manufacture of pistons

1984-09-06

1988-06-28

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29558, 92237, 92239, 123193P, B23P 1510

Patent

active

047529954

ABSTRACT:
A method is disclosed of manufacturing a piston having a skirt on which are formed a plurality of bearing surfaces, each bearing surface being at a predetermined axial position on the skirt, being spaced outwardly of the skirt to a required radial dimension and extending around the skirt with a required circumferential dimension. The method comprises forming the bearing surfaces in at least two stages. First a plurality of projections are formed on a skirt of the piston with each projection being at an axial position in which a bearing surface or surfaces are to be located. The radial and/or axial dimension of the projection exceeds the required corresponding dimension or dimensions of the bearing surfaces. A second step then forms bearing surfaces of the required dimensions. A second form of piston is formed with cylindrical portions which are alternately offset to one side or other of the piston axis to form, one each side of the piston, alternate projecting bearing surfaces and recessed skirt portions.

REFERENCES:
patent: 2344416 (1944-03-01), Scheibe
patent: 3438789 (1969-04-01), Weiss et al.
patent: 3621617 (1971-11-01), Muller
patent: 3654692 (1972-04-01), Goetz
patent: 3732759 (1973-05-01), Federenko et al.
patent: 4048975 (1977-09-01), Urquhart
patent: 4075934 (1978-02-01), Wecker et al.
patent: 4535682 (1985-08-01), Collyear et al.
Federal Republic of Germany, Patenanmeldung M-27434-IB/49l, (Jun. 18, 1955).

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