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Page des revendications

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Numéro de document de brevet: 2434025

(54) Titre anglais: OUTBOARD MOTOR

(54) Titre français: MOTEUR HORS-BORD

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Revendications:

Nota : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.




What is claimed is:


1. An outboard motor comprising a swivel case axially and steerably
supporting a propulsion unit, a pair of left and right stern brackets disposed
on left
and right sides of the swivel case and supporting the swivel case in a
vertically
tiltable manner via a tilt shaft, and an upper pivot shaft and a lower pivot
shaft that
are parallel to the tilt shaft and are provided in the swivel case and the
left and right
stern brackets respectively, upper and lower end portions of an extendable
part of a
tilt system being mounted on the upper and lower pivot shafts,
wherein the upper pivot shaft is provided with first and second mounting
parts that are offset in mutually opposite left and right directions from a
central
position between the pair of stern brackets, the offset of the second mounting
part
is set smaller than the offset of the first mounting part, and the upper end
portion of
the extendable part of the tilt system is mounted selectively on one of the
first and
second mounting parts according to the type of tilt system.

2. The outboard motor according to Claim 1 wherein the tilt system is of
a power type in which a hydraulic pump and an electric motor are connected to
one
side of a hydraulically operated cylinder, an upper end part of the
hydraulically
operated cylinder is mounted on the first mounting part, and the hydraulic
pump and
the electric motor are disposed on the second mounting part side.

3. The outboard motor according to Claim 1 wherein the tilt system is of
a gas-assist type in which a cylindrical accumulator tank is connected to one
side of
an assist cylinder, an upper end part of the assist cylinder is mounted on the
second mounting part, and the accumulator tank is disposed on the first
mounting
part side.



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4. The outboard motor according to any one of Claims 1 to 3 wherein the
pair of left and right stern brackets are provided with a plurality of sets of
pairs of left
and right adjustment holes arranged in the vertical direction, a stopper pin
that
determines the tilted down position of the propulsion unit by receiving a
stopper
surface formed on a front surface of the swivel case is inserted through and
supported selectively in one pair of the plurality of sets of adjustment holes
so as to
adjust the tilted down position of the propulsion unit in a plurality of
steps, the swivel
case has a second stopper surface formed below the stopper surface, the stern
brackets have formed thereon a stopper wall that defines the lowest tilted
down
position of the propulsion unit by receiving the second stopper surface when
the
stopper pin is detached from the adjustment holes, and these stern brackets
are
provided with retention holes that retain the stopper pin detached from the
adjustment hole.

5. The outboard motor according to Claim 4 wherein, when the second
stopper surface is received by the stopper wall, the swivel case is held
between the
two stern brackets.

6. The outboard motor according to either Claim 4 or 5 wherein, when
the stopper pin is inserted into the adjustment holes or the retention holes,
a
retaining key is axially supported on one end part of the stopper pin so that
the
retaining key can pivot between a dropped down position in which the retaining
key
is coaxial with the stopper pin and can pass through the adjustment holes or
the
retention holes together with the stopper pin, and a raised position in which
the
retaining key abuts against an outer side surface of one of the stern
brackets, and a
spring is fitted to the other end part of the stopper pin, the spring being
compressed
against an outer side surface of the other stern bracket and biasing the
stopper pin
in a direction opposite to the retaining pin.


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