| 主权项 |
1. A power miter saw, comprising:
a saw base having a center pivot axis and an arcuate recess having a pair of opposing arcuate surfaces formed in said base, said recess being generally concentric with and spaced from said center pivot axis; a table rotatably connected to said saw base about said center pivot axis; a saw blade and motor assembly operatively connected to said table; and a miter arm assembly for angularly positioning said table relative to said saw base, said assembly comprising a locking mechanism for locking said table relative to said saw base at any angular position along its range of angular movement, and an actuating mechanism operatively connected to said locking mechanism for operating said locking mechanism, said actuating mechanism including a rotatable control knob provided at a distal end of an elongated arm for controlling said operation of said locking mechanism, wherein said locking mechanism applies forces to said pair of opposing arcuate surfaces of said arcuate recess of said saw base to lock said table to said saw base without applying any appreciable forces to said center pivot axis, wherein said locking mechanism further comprises two clamping surfaces, each of which engage one of said arcuate surfaces when said locking mechanism locks said table to said base, wherein said clamping surfaces apply substantially equal magnitude clamping forces to said arcuate surfaces in opposite directions and thereby fail to transfer forces to said center pivot axis, and wherein said locking mechanism further comprises a first jaw including a first clamping surface of the two clamping surfaces and a second jaw including a second clamping surface of the two clamping surfaces, said first and second jaws being free to move at least a minimal amount in a generally radial direction relative to said arcuate surfaces and said center pivot axis to thereby balance said oppositely directed clamping forces. |
