Patent ID: 6510678
Filing Date: 2003-01-28
Classification: A01D,B60B,B60G,Y10S

Abstract:
A method of compensating for load change in a lawnmower having independent suspension, the method comprising:providing a main frame having first and second wheels coupled to the main frame and to respective independent suspensions, each independent suspension having a spring and a load compensation adjuster, the spring having a range of compression between an uncompressed state and fully compressed state; providing a seat coupled to the main frame; applying a downward force upon the seat; moving the seat downward in response to the downward force; moving the main frame downward with respect to the first wheel independently of movement of the second wheel; compressing the spring in response to movement of the main frame to a position within the range of compression between the uncompressed state and the fully compressed state; exerting a first force from the spring to the main frame in response to compressing the spring; compressing the load compensation adjuster in response to movement of the main frame; exerting a second force from the load compensation adjuster to the main frame in response to compressing the load compensation adjuster; and limiting compression of the spring to less than full compression by exerting the second force from the load compensation adjuster to the main frame.