B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
77/15
B23B 45/00 (2006.01) B25D 17/00 (2006.01) B25D 17/24 (2006.01)
Patent
CA 1164688
Abstract There is disclosed a combination rotary and percussive portable tool driven by an electric motor. The percussive means includes a reciprocating cylinder having embodied therein a reciprocatable piston striker. The cylinder is mounted in a guide tube which is spring loaded by a spring positioned between an internal wall in the housing and a cap removably mounted over an opening of the housing. The opening provides access to the housing in order to remove the guide tube and spring. With guide tube resiliently mounted in the housing, the guide tube and its interface with the housing is much less affected by the vibration and thermal conditions developed during operation of the tool. In addition, the tolerances required to mount the guide tube in the housing do not have to be kept as tight as they would have to be is a conventional mounting arrangement using welds or other rigid fastening means were used.
359251
Black & Decker Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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