Two cycle engine for small boat

Details Two cycle engine for small boat Two cycle engine for small boat

1991-05-17

1992-12-01

Cross, E. Rollins

Internal-combustion engines

Lubricators

Crankcase, pressure control

123196R, F01M 1102

Patent

active

051672073

ABSTRACT:
A number of embodiments of lubricating systems for small watercraft that might become inverted and wherein a lubricant reservoir supplies lubricant under gravity to a lubricant pump when the water pump is operating in a normal upright condition. An air return line extends from the lubricant pump back to the reservoir to pump air which may enter the lubricant pump back to the reservoir. Arrangements are provided for insuring that air cannot flow from the lubricant reservoir to the lubricant pump through the supply line when the watercraft is inverted and also for precluding lubricant pressure in the air return line from acting to force air back to the lubricant pump when the watercraft is inverted.

REFERENCES:
patent: 2531319 (1950-11-01), Briggs
patent: 2543828 (1951-03-01), Brown
patent: 2575315 (1951-11-01), Edwards
patent: 3181473 (1965-05-01), Duron
patent: 3554322 (1971-01-01), Deutschmann
patent: 3670850 (1972-06-01), Swearingen
patent: 4681189 (1987-07-01), Krisiloff
patent: 4787832 (1988-11-01), Fukasawa et al.
patent: 4971532 (1990-11-01), Slattery

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