Motors: expansible chamber type – Working member position responsive motive fluid control – Venting expanding chamber
Patent
1974-03-12
1976-06-15
Cohen, Irwin C.
Motors: expansible chamber type
Working member position responsive motive fluid control
Venting expanding chamber
92113, F15B 1522
Patent
active
039629554
ABSTRACT:
Disclosed herein is a marine propulsion device comprising a tilt hydraulic cylinder-piston assembly connected between a first member adapted to be attached to a boat and a second member connected to the first member for vertical swinging movement relative to the boat, and a trim hydraulic cylinder-piston assembly connected to the first and second members. Also provided is a hydraulic system connected to the tilt and trim hydraulic cylinder-piston assemblies for pressurization thereof.
In one embodiment, the trim assembly includes a cylinder, a piston assembly located in the cylinder and having a first piston with a port therein and a second piston spaced axially from and fixedly connected to the first piston, together with a piston rod, means connecting the piston assembly to the piston rod for limited relative movement therebetween, valve means normally closing the port, and means for operating the valve means to open the port upon movement of the piston assembly to a predetermined position.
In another embodiment, the trim assembly includes a cylinder, a piston assembly located in the cylinder, together with a piston rod, and means connecting the piston assembly to the piston rod for limited relative movement therebetween.
REFERENCES:
patent: 2902007 (1959-09-01), Rockwell
patent: 2993474 (1961-07-01), Ladd
patent: 3004524 (1961-10-01), McCay et al.
patent: 3450006 (1969-06-01), White
patent: 3572215 (1971-03-01), Harris
Borst Gaylord M.
Meyer Martin H.
Cohen Irwin C.
Outboard Marine Corporation
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