초록 ▼

The present dolly for catamarans has soft-walled, inflatable tires which expand axially under load to keep the load pressure on each tire not more than 2 psi where the tire tread engages the ground. Self-lubricating needle bearings are engaged between each ground wheel and a hollow axle. The axle is

The present dolly for catamarans has soft-walled, inflatable tires which expand axially under load to keep the load pressure on each tire not more than 2 psi where the tire tread engages the ground. Self-lubricating needle bearings are engaged between each ground wheel and a hollow axle. The axle is covered by rubber sleeves axially outboard of the tires. Annular hull chocks are attached to the opposite ends of the axle, and each chock has a convex inboard face which is covered with outdoor carpeting. A flexible line extends through the axle and beyond the axle at each end for releasable attachment to the catamaran hulls.

대표청구항 ▼

In a dolly for a catamaran, said dolly having an axle and a pair of ground wheels having rims spaced apart along said axle, the improvement wherein: each of said ground wheels has an inflatable, soft-walled, low pressure tire which under the weight of the catamaran is expandable axially at its groun

In a dolly for a catamaran, said dolly having an axle and a pair of ground wheels having rims spaced apart along said axle, the improvement wherein: each of said ground wheels has an inflatable, soft-walled, low pressure tire which under the weight of the catamaran is expandable axially at its ground-engaging tread to maintain a load of less than about 2 pounds per square inch on the tire thereat; and further comprising plastic anti-friction bearings engaged between the axle and each wheel to permit rotation of the axle within the wheels; and wherein said anti-friction bearings have metal races comprised of the axle and the rims and are needle bearings of self-lubricating plastic material due to wear and accumulation of plastic on said races.