Expandable piston motor

Details Expandable piston motor Expandable piston motor

1980-01-16

1982-08-03

Feinberg, Craig R.

Internal-combustion engines

Four-cycle

Variable clearance

123 4138, 123193P, 92220, F02B 7504

Patent

active

043422918

ABSTRACT:
An internal combustion engine comprises a piston having first and second coaxial parts movable axially relative to each other in the direction of reciprocation of the piston and having a chamber therebetween which varies in volume with the relative movement. A conduit for fluid connects the chamber to a lubricant opening on a crank pin of a crankshaft. An inlet rotary valve between the lubricant opening and the chamber permits a flow of pressurized lubricant from the opening to the chamber at a first rotational position of the crankshaft and seals the chamber from the opening at other rotational positions of the crankshaft.

REFERENCES:
patent: 2142175 (1939-01-01), Buttner
patent: 2144449 (1939-01-01), Church
patent: 3136306 (1964-06-01), Kamm
patent: 3200798 (1965-08-01), Mansfield
patent: 3450111 (1969-06-01), Crowstedt
patent: 4241705 (1980-12-01), Karaba et al.

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