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US 5,211,254 AGranted
Motorized wheelbarrow with multiple speed transmission
AssigneeE-Z Haul Corporation
InventorsIsaac E. Harris, III, Douglas O. Deal
Life of this patent
Estimating the term…
Abstract
A motorized wheelbarrow employing a lightweight and small displacement engine and multi-speed transmission to drive the wheel of the wheelbarrow. The multi-speed transmission permits use of a lightweight and small displacement engine which has been set to operate at a constant predetermined peak power RPM so as to provide power to the wheelbarrow at both low and relatively high rates of speed.
Claims14
A motorized wheelbarrow for transporting a load comprising:
- a frame including a pair of spaced-apart handles each having a proximal and distal end and a pair of downwardly depending support legs;
- a wheel secured to the distal ends of said spaced-apart handles for bearing the load of said wheelbarrow when the proximal ends of said handles are lifted;
- mounting means secured to said frame for supporting a drive engine, said mounting means comprising a platform secured at each of the opposing sides thereof to a respective one of said pair of handles;
- drive means secured to said mounting means for driving said wheel and comprising:
- a gasoline engine having a displacement between about 15 and 60 cubic centimeters and adapted to operate at a substantially constant predetermined speed mounted to one side of said platform;
- a multiple speed transmission mounted to said one side of said platform;
- speed reduction means mounted on the other side of said platform operatively connecting said engine and said transmission to facilitate a selective change in linear speed of said wheelbarrow while said engine maintains said substantially constant speed;
- and means connecting said transmission and said wheel for driving said wheel;
- and
- a load bed attached to said frame.
7 more elements
A motorized wheelbarrow for transporting a load comprising;
- a frame including a pair of spaced-apart handles each having a proximal and distal end and a pair of downwardly depending support legs;
- a wheel secured to the distal ends of said spaced-apart handles for bearing the load of said wheelbarrow when the proximal ends of said handles are lifted;
- mounting means secured to said frame for supporting a drive engine, said mounting means comprising a platform secured at each of the opposing sides thereof to a respective one of said pair of handles;
- drive means secured to said mounting means for driving said wheel and comprising:
- a gasoline engine having a displacement between about 15 and 60 cubic centimeters and adapted to operate at a substantially constant predetermined speed;
- a multiple speed manual transmission and operatively connected shifter lever to facilitate a selective change in linear speed of said wheelbarrow while said engine maintains said substantially constant speed;
- a manually actuated clutch actuated by a slidably movable hand control mounted on the proximal end of one of said pair of handles operatively connected to said transmission;
- speed reduction means operatively connecting said engine and said transmission;
- and means connecting said transmission and said wheel for driving said wheel, wherein said engine and transmission are mounted to one side of said platform and said speed reduction means are mounted on the other side of said platform;
- and
- a load bed attached to said frame.
8 more elements
Dependencies are inferred from the claim text.