Patent ID: 7530885
Filing Date: 2009-05-12
Classification: B24B,B25F

Abstract:
1. A pneumatic grinder with improved handle structure, said grinder comprising a driving portion, a grinding portion and a connecting portion provided therebetween, wherein the connecting portion includes an improved handle structure that comprises: a handle fixing portion, which is provided at one side of the connecting portion which has an accommodating space, and a slot provided on a top surface thereof; a packing element, comprising a first packing surface on a top surface thereof, and having a bottom surface thereof for engaging the top surface of the handle fixing portion, and said packing element further including a through hole; a handle, which has a second packing surface at one end that closely fits the first packing surface on top of the packing element wherein the second packing surface includes a first threaded portion; and a pivot element, which is deposited in the accommodating space of the handle fixing portion and having a second threaded portion at an end corresponding to the slot of the handle fixing portion wherein the handle fixing portion is formed by two homologous shells fastened oppositely and has a curviform top surface and two plate sidewalls relatively located at two sides of the curviform top surface wherein the two flat sidewalls are respectively closely fitted by two flat sidewalls located at opposite sides of the packing element such that tightening the handle into the pivot element causes the two flat sidewalls of the packing element to tighten against the two flat sidewalls of the handle fixing portion.