Composite piston assembly for automotive air conditioning compre

Details Composite piston assembly for automotive air conditioning compre Composite piston assembly for automotive air conditioning compre

1990-01-08

1991-06-11

Look, Edward K.

Expansible chamber devices

Piston

Nonmetallic portion

29525, 29888047, F16J 900, B23P 1902

Patent

active

050223135

ABSTRACT:
A composite piston for an automotive air conditioning compressor is provided having an aluminum shank or piston rod, a reinforced plastic piston head and a steel ball for engaging a socket plate or the like. The shank has a distal end that has a slight reverse taper and a knurled surface for providing attachment to the plastic head that is molded thereon. The proximal end of the shank has a barrel to which the steel ball is press fitted. The shank is provided with a first collar adjacent the knurled distal end of the shank and a second collar adjacent to and intermediate the first collar and the proximal end of the shank. The first collar provides a seal for the mold cavity into which plastic is injected to form the piston head over the knurled surface of the shank. The second collar provides a support for the press fit operation of the steel ball onto the distal end of the shank.

REFERENCES:
patent: 1748612 (1930-02-01), Muhlfeld
patent: 2387181 (1942-01-01), Procter
patent: 3150570 (1964-09-01), Johnson et al.
patent: 3354791 (1967-11-01), Wahlmark
patent: 4070122 (1978-01-01), Wisner
patent: 4336920 (1982-06-01), Murray
patent: 4348348 (1982-09-01), Bennett et al.
patent: 4453300 (1984-06-01), Klimek et al.
patent: 4551292 (1985-11-01), Fletcher et al.
patent: 4690617 (1987-09-01), Oda et al.
patent: 4794894 (1989-01-01), Gill

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