Vehicle lifting jack

Claim 1

A vehicle jack comprising: a leg formed with a straight shank having an upper end, a foot angled from and formed on a lower end of said .[.shanks.]. .Iadd.shank.Iaddend., a nonslip rib on the underside of said foot extending substantially over the entire width thereof, said foot having an extended locating surface extending forwardly of said rib and provided with projections, and a contact surface rearwardly of said rib .Iadd.and rigid with said foot.Iaddend., the upper end of said leg being formed with a notch .Iadd.and being free from any ground-engaging support between said foot and said notch, said contact surface being at least twice as long as said locating surface.Iaddend.; an elongated carrier arm having one end pivotally connected to said shank and another end .[.another end.]. formed with a vehicle-engaging head; a nut pivotally mounted in said notch at said upper end of said leg; a .[.thread.]. .Iadd.threaded .Iaddend.elongated spindle received in said nut at an intermediate portion along its length; a thrust bearing pivotally mounted on said arm at an intermediate location between the ends thereof and engaging one end of said spindle; and a crank on the other end of said spindle for rotating same to thread said spindle along said nut and raise and lower said head .Iadd.said nut being formed with a pair of oppositely extending journal pins, said leg being of U-cross section having side limbs formed with slots constituting said notch, said pins being received in said slots, said thrust bearing comprising a roller bearing and a counterbearing ring, receiving said roller bearing, said arm being of U-cross section and having side limbs formed with slots receiving pins of said counterbearing ring. .Iaddend.