U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Catamaran boat dollies

Patent 4235450 Issued on November 25, 1980. Estimated Expiration Date: Icon_subject February 10, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3271798

3436774

Inventor

Application

No. 05/876643 filed on 02/10/1978

US Classes:

280/47.32, Single wheel vehicle114/344, With wheeled buoyant landing or launching aid280/47.331Boat carrier

Examiners

Primary: Pekar, John A.

Attorney, Agent or Firm

International Class

B63C 13/00 (20060101)

Abstract

Catamaran boat dollies are provided, one for each of the hulls of a catamaran, for moving the catamaran along a beach or other supporting surface. Each dolly has a cradle mounted on a single wheel, the axis of the wheel axle declining outwardly from the cradle to define an included angle with the vertical of approximately 75°. Longitudinal bars of the cradle embrace opposite sides of the associated hull, and the disposition of the wheel and its axle results in a bending or rotational moment which causes the cradle to clampingly engage the hull. Because of the shape of a fourteen or sixteen foot "Hobie" type hull, the catamaran will remain in satisfactory engagement with the dollies as it is moved across the surface, but is preferably provided with a tie-down band for retaining the dolly in place as the catamaran is moved into or out of the water. For a "Sizzler" or "Prindle" type hull the cradle has opposed bars which engage opposite sides of a metal keel, and a tie-down band is provided for preventing the hulls from bouncing from between these bars. A protective coating such as polyvinyl-chloride preferably covers the cradle and other parts of the dolly to protect metal of the dolly and to protect the hulls from abrasion.

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