Patent ID: 9352942
Filing Date: 2016-05-31
CPC Classification: B66F

Claim Text:
1. An axle jack, comprising: a base plate having an upper surface, a lower surface, a forward edge and a rearward edge; a support column mounted to the base plate upper surface near the base plate rearward edge, distal from the base plate forward edge; an axle plate mounted to the support column distal from the base plate; a plurality of treads configured for removable assembly to the base plate lower surface, each of the treads having a width, a length, and a depth configured to securingly conform to a width, a length and a depth of the base plate, each of the treads comprising: wherein the plurality of treads comprising a first tread, a second tread, and a third tread; wherein the exterior surface of the first tread comprises a center portion centrally disposed between the rear wall, the front edge, the right wall, and the left wall, the center portion comprising a plurality of obround humps arranged in a pair of rows, the humps of one of the rows being off-set from the humps in the other row; wherein the exterior surface of the second tread comprises a plurality of V-shaped protuberances, wherein substantially all of the protuberances have an apex, wherein the apices are centrally aligned from the front edge to the rear wall, wherein the protuberances are disposed on the entire exterior surface of the second tread; and wherein the exterior surface of the third tread comprising a plurality of triangular bumps disposed on the entire exterior surface, wherein the bumps are arranged in alternating configuration of a pair of the bumps alternating with a single one of the bumps from the front edge to the rear wall.