Lubricating means for pin connected relatively rotatable engine

Details Lubricating means for pin connected relatively rotatable engine Lubricating means for pin connected relatively rotatable engine

1989-11-29

1991-01-15

Cross, E. Rollins

Internal-combustion engines

Transmission mechanism from piston

Including clutch

92159, 384381, 184 68, 74605, 74587, 123196R, F02B 7532

Patent

active

049845446

ABSTRACT:
A lubricating system is provided at a junction of relatively rotatable members of an engine in an environment where oil comes into contact with the external surface of the rotatable members. The junction includes a relatively rotatable member provided with a bore and pin extending through the bore. The pin is snugly received in the bore so that rotation between the pin and relatively rotatable member may occur. An example of such a system is provided by the wrist pin connection to a piston. According to the invention, within the bore are recesses spaced inwardly and separated from both ends of the bore and arranged diametrically opposed to each other on a line transverse to the principal linear movement of the wrist pin. A pocket for oil is provided by each of the recesses between the bore of the rotatable member and the pin for accumulation of oil to lubricate between the surfaces of the pin and bore. The recesses may also be connected to an oil-splattered surface by a duct sufficiently small to inhibit pressure within the recess from forcing oil outward, but capable of sucking oil inward from the oil-splattered outer surface.

REFERENCES:
patent: 4450797 (1984-05-01), Moser et al.
patent: 4915067 (1990-04-01), Imajo

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