Piston having asymmetrical pin bore slot placement

Details Piston having asymmetrical pin bore slot placement Piston having asymmetrical pin bore slot placement

2007-07-24

2007-07-24

Lazo, Thomas E. (Department: 3745)

Expansible chamber devices

Piston

With separable means for pivotally mounting connecting rod...

C403S150000

Reexamination Certificate

active

11263178

ABSTRACT:
A piston, having a first side subject to major thrust loading and a second side subject to minor thrust loading, is provided. The piston has a crown portion and a first and second pin boss portion depending therefrom. An axially extending pin bore is provided within the first and second pin boss portions. A first axially extending slot is provided within the piston pin bore on the first side. Additionally, a second axially extending slot is provided within the piston pin bore on the second side of the piston. The second axially extending slot is positioned closer to the crown portion than the first axially extending slot. The first and second axially extending slots are generally concave in shape.

REFERENCES:
patent: 3626815 (1971-12-01), Fingeroot et al.
patent: 4534274 (1985-08-01), Ripberger et al.
patent: 4683808 (1987-08-01), Wacker et al.
patent: 4730547 (1988-03-01), Murray
patent: 5331932 (1994-07-01), Watanabe et al.
patent: 6279456 (2001-08-01), Ueshima et al.
patent: 6513477 (2003-02-01), Gaiser et al.
patent: 11200945 (1999-07-01), None

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