Trolling attachment for boats
OwnerRobert J. Diffely, Sr.inventor
Life of this patent
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Abstract
A trolling attachment for motor boats comprises pivotal trolling flaps for securement to the transom of a boat so that the flaps may be lowered into and raised from the water as required. The flap are carried on a rectangular box-section tube with leaf springs disposed against the tube to provide resilient frictional resistance to movement of the flaps and positive location and retention of the flaps in the raised and lowered positions by engagement of the springs against adjacent surfaces of the tube respectively.
Claims15
A trolling attachment for a motorboat comprising a trolling flap connected with a shaft, journal means for rotatably mounting the shaft on a transom of a boat so that rotation of the shaft enables the flap to be lowered into and raised from water in which the boat operates, a collar on the shaft having an outer surface with adjacent angularly displaced outer surface portions, an elongate leaf spring, and means for securing an upper end of the leaf spring to the transom with the lower end of the spring extending over the outside of and bearing against the outer surface of said collar to provide frictional resistance to rotation of the shaft between positions in which the spring engages respective ones of said surface portions, the flap being in raised position out of the water when the spring is in engagement with one of said surface portions and being in lowered position in the water when the spring is in engagement with the other of said surface portions, and the spring positively engaging one or other of said surface portions to provide positive location and retention of the flap in one or other of said positions, said collar comprising a rectangular box-section tube having one surface to which the flap is secured, and the spring is adapted to engage adjacent surfaces of the tube to locate the flap in the respective raised and lowered positions which are separated by 90.degree. of shaft rotation.
A trolling attachment for a motorboat comprising a trolling flap connected with a shaft, journal means for rotatably mounting the shaft on a transom of a boat so that rotation of the shaft enables the flap to be lowered into and raised from water in which the boat operates, a collar on the shaft having an outer surface with adjacent angularly displaced outer surface portions, an elongate leaf spring, and means for securing the leaf spring to the transom with one end of the spring bearing against the outer surface of said collar to provide frictional resistance to rotation of the shaft between positions in which the spring engages respective ones of said surface portions, the flap being in raised position out of the water when the spring is in engagement with one of said surface portions and being in lowered position in the water when the spring is in engagement with the other of said surface portions, and the spring positively engaging one or other of said surface portions to provide positive location and retention of the flap in one or other of said positions, means for varying the tension with which the spring engages the outer surface of said collar so as to adjust the force required to move the flap between the raised and lowered positions, the means for securing the leaf spring to the transom including a protruding bolt extending through an opening in the spring and a nut engaging the free end of the bolt, the nut providing said means for varying the tension of the spring.
A trolling attachment on a transom of a motorboat comprising shaft means, a pair of trolling flap assemblies on the shaft means each comprising a trolling flap connected to a rectangular section tube coaxially mounted on the shaft means, the trolling flap assemblies being spaced apart to accommodate the boat's motor therebetween, elongate brackets at respective ends of the shaft means rotatably attaching the shaft means to the transom and respective elongate leaf springs having upper ends attached to the transom above the shaft means and lower ends engaged over the outsides of the respective rectangular section tubes, the leaf springs resiliently engaging respective surface portions of the tubes for positively locating the flap assemblies in raised and lowered positions of the flaps determined by rotation of the shaft means.
Dependencies are inferred from the claim text.