Inboard outboard drive and mounting therefor
AssigneeAB Volvo Penta
InventorsLennart Brandt, Heinz Pichl
Life of this patent
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Abstract
An inboard outboard drive is at the housing portion passing through the hull provided for sealing and damped support, with a resilient element with a non-collapsible cross-sectional shape which is subject to a constantly acting compressing force, conveniently generated by the weight of the engine. When cracks occur in the resilient element, the edges of the cracks are pressed together by this compressing force, whereby penetration of water into the hull is prevented or at least rendered more difficult. The invention is suited for application in inboard outboard drives of the S-type as well as of the Z-type.
Claims21
An inboard outboard drive for use in a boat having a hull with an opening therein, comprising an engine mounted inboard in the hull and structural means including a housing which passes through said opening with a peripheral space for free motion, a lower unit located at least partially outboard, a lower angular gear box on the lower portion of said lower unit, a propeller mounted for rotation on the lower portion of said lower unit and power transmission drive train means between the engine and propeller which includes said lower angular gear box for driving said propeller;
- an annular resilient element extending around said housing and the periphery of said opening to seal said peripheral space, mounting means on said hull for supporting said inboard outboard drive on said hull including first engaging means on said housing and second engaging means on said hull engaging opposite end of the height of the profile of said resilient element which has a profile which owing to the relation of its height to the thickness transverse to the height prevents buckling out or collapse, and providing a force on said inboard outboard drive to constantly subject said resilient element to a compressing force to close any crack in said resilient element to prevent or reduce leakage, said housing being a portion of said lower unit having said first engaging means, said annular resilient element having an inner periphery mounted on said first engaging means on said lower unit and an outer periphery more forward in the direction of said compressing force mounted on said second engaging means provided by an annular mounting shield affixed and sealed to said resilient element and fixed and sealed to said hull around the opening.
An inboard outboard drive for use in a boat having a hull with an opening therein, comprising an engine mounted inboard in the hull and structural means including a housing which passes through said opening with a peripheral space for free motion, a lower unit located at least partially outboard, a propeller mounted for rotation on the lower portion of said lower unit and power transmission drive train means between the engine and propeller;
- an annular resilient element extending around said housing and the periphery of said opening to support in a vibration damping manner said housing and to seal said peripheral space, first engaging means on said housing and second engaging means on said hull engaging said resilient element at opposite ends of its cross-section which owing to the relation of its height to the thickness prevents buckling out or collapse upon compression, said housing being a portion of said lower unit having said first engaging means, said annular resilient element having an inner periphery mounted on said first engaging means on said lower unit and an outer periphery more forward in the direction of a compressing force mounted on said second engaging means, said inner and outer peripheries of said resilient element being free to move relative one another in said direction of said compressing force and in a direction reverse thereto.
Dependencies are inferred from the claim text.