Patent ID: 7597524

Claim:
A wheel dolly comprising: two support arms for engaging a wheel, the support arms being spaced a horizontal distance from each other, wherein each support arm comprises a four bar linkage including a lower linkage and an upper linkage, each four bar linkage being configured to permit the upper linkage of each support arm to move upwardly in relation to the lower linkage; a base arm having two ends, each end being connected to one of the support arms; wherein, the base arm includes: a first member configured to have an adjustable length and extending along a first axis; a second member configured to have an adjustable length and extending along a second axis, the second member being configured to be movable in relation to the first member such that the second axis moves apart from the first axis; a first rotatable threaded rod extending within the first member, the first threaded rod configured, when rotated, to adjust the length of the first member and also to adjust the length of the second member; two lifting arms each having first and second ends, each lifting arm being pin connected at the first end to the second member of the base arm, and pin connected at the second end to one of the upper linkages; and a second rotatable threaded rod configured, when rotated, to move the second member in relation to the first member, whereby the second axis is moved apart from the first axis and each lifting arm is lifted, thereby lifting each upper linkage.