B - Operations – Transporting – 27 – B
Patent
B - Operations, Transporting
27
B
143/44
B27B 19/00 (2006.01)
Patent
CA 1126134
CAM MECHANISM FOR IMPARTING ORBITAL MOVEMENT TO THE BLADE OF A RECIPROCATING SAW Abstract Of The Disclosure The jigsaw has a drive gear carrying an eccentrically mounted drive pin forming part of a Scotch-yoke mechanism for reciprocating the blade holder along a first path. Upper and lower bearing assemblies mount the blade holder for reciprocating movement along the first path and for pivoting movement; the lower bearing assembly is mounted for reciprocating movement along a second path transverse to the first path thereby to impart corresponding movement to the lower portion of the blade holder. The drive gear has an annular concentric cam surface arranged for engagement with the lower bearing assembly. A resilient member engages the blade holder for urging the lower bearing assembly against the cam surface to cause reciprocation of such bearing assembly along the second path whereby a saw blade attached to the blade holder will trace out an enclosed path. An adjustment cam is provided to vary the stroke of movement of the lower bearing thereby to vary the shape of the path of movement of the blade.
340120
Sim & Mcburney
Skil Canada Ltd.
LandOfFree
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