Piston for tilt and trim unit of outboard drive of marine propulsion unit
AssigneeSoqi Kabushiki Kaisha
InventorHideaki Saito
Life of this patent
Estimating the term…
Abstract
A very effective unit for adjusting the condition of a marine propulsion device that is constructed in such a way to protect the various components from wear caused by foreign particles that may be formed during its life by trapping the particles in a cavity formed in an upper surface of an actuating piston.
Claims14
A position adjusting arrangement for an outboard drive supported for pivotal movement about an axis on a watercraft hull, said arrangement comprising a first unit fixed for pivotal movement relative to the hull and a second unit adapted to be connected to the outboard drive, one of said units comprising a body defining a cylinder bore, the other of said units comprising a piston reciprocating in said cylinder bore and dividing said cylinder bore into two axially spaced chambers and a piston rod fixed to said piston and extending through one of said chambers for connection to the respective of the outboard drive and the hull, and a cavity formed in an uppermost surface of said piston spaced inwardly of its engagement with said cylinder bore for receiving foreign particles and precluding their entry to the mating surfaces of said piston and said cylinder bore, and an annular sealing ring positioned at the uppermost surface of the piston above said cavity.
A position adjusting arrangement for an outboard drive supported for pivotal movement about an axis on a watercraft hull, said arrangement comprising a first unit fixed for pivotal movement relative to the hull and a second unit adapted to be connected to the outboard drive, one of said units comprising a body defining a cylinder bore, the other of said units comprising a piston reciprocating in said cylinder bore and dividing said cylinder bore into two axially spaced chambers and a piston rod fixed to said piston and extending through one of said chambers for connection to the respective of the outboard drive and the hull, and a closed bottom cavity formed in an uppermost surface of said piston spaced inwardly of its engagement with said cylinder bore for receiving and entrapping foreign particles and precluding their entry to the mating surfaces of said piston and said cylinder bore.
Dependencies are inferred from the claim text.