Scissors jack which has improved formed gear teeth

  • US 5,110,091 A
  • Filed: 07/29/1991
  • Issued: 05/05/1992
  • Est. Priority Date: 07/29/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. A scissors type jack comprising, a base, a pair of lower links which have first ends pivotally attached to said base, a support member, a pair of upper links which have first ends pivotally attached to said support member, a threaded collar with opposite ends pivotally attached to second ends of first ones of said pair of upper and lower links, a block member formed with a central opening and with opposite ends pivotally attached to second ends of second ones of said pair of upper and lower links, a threaded shaft which extends through said central opening of said block member and threadedly received in said threaded collar, flanges formed on said pair of lower links and meshing gear teeth formed on said first ends on said flanges, flanges formed on said pair of upper links and meshing gear teeth formed on said first ends on said flanges, and the flanges and meshing teeth of said lower links extending in a direction which is opposite to the direction of the flanges and teeth of said upper links.

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