Stern drive for boats
OwnerHarry L. Schoellinventor
Life of this patent
Estimating the term…
Abstract
A stern drive for an inboard engine mounted in a boat, the stern drive having all of the sensitive bearings inboard of the boat to protect them from water damage, and a screw type trim system mounted on the inside of the boat transom for raising and lowering the stern drive to adjustably trim the surface of the drive unit.
Claims12
A stern drive unit mountable on a boat transom to submerge a propeller and a rudder below a water surface, comprising:
- a pivotal arm, extending generally perpendicularly to said boat transom when mounted thereon, having a propeller shaft support means and a rudder support means on a first end portion of said pivotal arm and a second end portion pivotally mountable to said boat transom;
- a propeller shaft rotatably mounted in said propeller shaft support means having a first end with a propeller mounted thereon and having a second end with a universal joint connectible to an engine-transmission assembly to rotate said shaft;
- a through transom fitting mountable in the transom and having an opening for receiving said propeller shaft;
- a stuffing box means mounted between said propeller shaft and said through transom fitting for sealing said transom against leaking;
- a rudder for steering said boat mounted on said rudder support means;
- means for rotating said rudder;
- and
- means for raising and lowering said pivotal arm to adjust the angle of the pivotal arm relative to the transom when attached thereto.
In a boat having a transom and a motor and transmission assembly, an improved stern drive unit mounted on the transom to submerge a propeller and a rudder below a water surface, the improved stern drive comprising:
- a pivotal arm, extending generally perpendicularly to said boat transom, having a propeller shaft support means and a rudder support means on a first end portion of said pivotal arm and a second end portion pivotally mounted to said boat transom;
- a propeller shaft, rotatably mounted in said propeller shaft support means, having a first end with a propeller mounted thereon and a second end pivotally connected to an engine-transmission means by a universal joint to rotate said shaft;
- a through transom fitting mounted in the transom and having an opening for receiving said propeller shaft;
- a stuffing box means mounted between said propeller shaft and said through transom fitting for sealing said transom against leaking;
- a rudder for steering said boat mounted on said rudder support means;
- means for rotating said rudder;
- and
- means for raising and lowering said pivotal arm to adjust the angle of the pivotal arm relative to the transom.
Dependencies are inferred from the claim text.