Hydraulically actuated marine transmission

Details Hydraulically actuated marine transmission Hydraulically actuated marine transmission

2011-08-16

2011-08-16

Bonck, Rodney (Department: 3655)

192 clutches and power-stop control

Clutches

Plural clutch-assemblage

C192S048612, C192S051000, C192S085500, C440S075000

Reexamination Certificate

active

07997398

ABSTRACT:
A marine transmission provides a cylindrical spool valve that is disposed within the gear case of the transmission and has a movable portion that is axially movable in a vertical direction to select forward, neutral, and reverse gear positions of the transmission. A piston assembly provides a primary piston and two auxiliary pistons which cooperate with each other to provide appropriate hydraulic forces which move a dog clutch into engagement with forward or reverse gears or toward a location in non-engagement with neither the forward nor reverse gears. The spool valve is generally cylindrical and disposed within a narrow column portion of the gear case of a marine propulsion system.

REFERENCES:
patent: 3623583 (1971-11-01), Shimanckas
patent: 3752281 (1973-08-01), Arnold
patent: 3919964 (1975-11-01), Hagen
patent: 3944035 (1976-03-01), McRay
patent: 4698035 (1987-10-01), Ferguson
patent: RE36342 (1999-10-01), McFadyen
patent: 6062926 (2000-05-01), Alexander et al.
patent: 6755703 (2004-06-01), Erickson
patent: 6884131 (2005-04-01), Katayama
patent: 7162946 (2007-01-01), Jeon
patent: 7291048 (2007-11-01), Phillips et al.
U.S. Appl. No. 11/893,746, Phillips et al.

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