Patent ID: 8549766
Filing Date: 2013-10-08
Classification: F16H

Abstract:
1. In a rack extension jig device which is used to add a rack or racks when aligning a plurality of racks straight along lengthwise directions of said racks so as to drive a pinion along said racks, said rack extension jib device comprising: a hand grip body having at least two tooth projections including a front tooth projection and a rear tooth projection, said front tooth projection engaging with a tooth surface of one rack and said rear tooth projection engaging with a tooth surface of another rack among two neighboring racks; said tooth projections being directed in a coplanar relationship with each elevational direction of said racks when aligned lengthwise straight, said tooth projections engaging with the respective racks so as to determine a pitch interval among said two neighboring racks; and said hand grip body having an adjustment side plate which engages with respective elevational sides of said neighboring racks at the contact portion between said neighboring racks when aligned straight.