Quick change mechanism for diamond arbor circular saw blades and

Details Quick change mechanism for diamond arbor circular saw blades and Quick change mechanism for diamond arbor circular saw blades and

1986-08-28

1988-11-29

Bell, Paul A.

Cutlery

Cutting tools

Saw

403247, 83666, F16B 700

Patent

active

047871474

ABSTRACT:
This quick change mechanism is a single bolt-on attachment for standard hand held power driven circular saws, to thereafter quickly install and remove diamond arbor saw blades without using any tool. A disc with a raised protruding center body is shaped to fit a standard diamond center blade, which when pressed down over this center body, is centered flat against the upper surface of the disc. The blade is then locked in place by expanding opposite undercut sections, which include the two closest points of the diamond. These expanding sections have undercut slots just above the upper disc surface and serve to wedge the blade down when moved radially outward. These resulting two wedging and sliding locks of the undercut sections are integral with radially sliding members, which move in and out in complementary "V" slots cut into the blade holding disc. Two coil springs inset in cavities drilled into the inside edges of the wedging and sliding locks exert constant outward pressure on these wedging and sliding locks. When the drive shaft is rotating, this locking outward pressure is significantly increased by centrifugal force. A spiral lock ring is inset on the outer diameter surface of the blade holder disc, to limit outward travel of these wedging and sliding locks and to provide circumferential support of the whole assembly. Blade removing is started by pinching the two slide locks, moving them inward.

REFERENCES:
patent: 3869795 (1975-03-01), Treace
patent: 4205572 (1980-06-01), Weiner
patent: 4508468 (1985-04-01), Irwin
patent: 4657428 (1987-04-01), Wiley

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