B - Operations – Transporting – 27 – B
Patent
B - Operations, Transporting
27
B
B27B 19/02 (2006.01) B23D 51/14 (2006.01)
Patent
CA 2216490
The present invention relates to an improved locking mechanism for blade of coping saw. The free ends of the upper and lower swinging arms of the coping saw is removably disposed with an upper and lower fixing blocks respectively for mounting and bridging a blade therebetween. The blade of general type can be readily bridged and supported between the slits of the upper and lower fixing blocks in usual manner: In assembling, the blade can be suitably disposed between the slit of the upper fixing block and the slit of the lower fixing block. Then a locking screw is suitably passed through the traverse hole of the slit and engaged into the threaded hole. As a result, the upper end of the blade is fixedly attached to the upper fixing block. Similarly, another locking screw is applied and which is passed through the traverse hole of the slit and is finally engaged into the threaded hole. As a result, the lower end of the blade is fixedly attached to the lower fixing block. In case a variant of the blade which has a cross portion at both ends is used, it can be also attached to the upper and lower fixing blocks. In mounting, the upper end of the blade is disposed within the slit such that the cross end is firmly seated onto the upper concave portion. Then a locking screw is applied and which passes through the through hole of the upper block and finally locked into the threaded hole. As a result, the upper end of the variant blade can be suitably supported and locked. Similarly, the lower end of the variant blade is also attached to the lower fixing block in the same manner as the upper end. By this arrangement, the variant blade is fixedly bridged between the upper and lower fixing blocks. By this arrangement, since the variant blade can be fixedly and firmly supported between the upper and lower fixing blocks, the oscillated cutting movement of the variant blade can be more efficiently and smoothly performed without any possibility of removing therefrom. As a result, the existing blades can be suitably disposed and supported between the free ends of the upper and lower ends of the upper and lower swinging arms for cutting movement.
Chen Ruey-Zon
Ridout & Maybee Llp
LandOfFree
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