Joints and connections – Including ancillary means blocking disconnection of joint – Blocker for assembled joint retainer
Patent
1986-08-04
1988-03-15
Kundrat, Andrew V.
Joints and connections
Including ancillary means blocking disconnection of joint
Blocker for assembled joint retainer
403349, 403359, 30388, 83665, B25G 300, F16B 700
Patent
active
047309520
ABSTRACT:
To eliminate the need for using a hand wrench or another hand tool to remove lock nuts, screws, or other fasteners, to be able thereafter to remove a circular saw blade from a powered hand or table saw, this quick change mechanism is installed on the shaft or arbor of the powered saw. There is a preassembly of: a splined and grooved circular saw blade holder; a complementary splined slide lock with upwardly extending spline finger, for axially sliding on the blade holder; an installation bolt passable down through this blade holder and this slide lock, having an axial spring receiving cavity in a tapered head, also having an allen wrench receiving cavity; a coiled spring to be received in this cavity; and a release button with depending spring legs terminating in feet for passing about this coiled spring and down alongside the blade holder, via grooves formed in the spline recesses of this blade holder. These spring legs also pass inside the slide lock's upwardly extending spline fingers, until the feet thereof radially extend, under the spring force of these legs, to enter respective slots formed on the inside of these upwardly extending spline fingers, until the feet thereof radially extend, under the spring force of these legs, to enter respective slots formed on the inside of these upwardly extending spline fingers to complete this preassembly of the essential components of this quick change mechanism for circular saw blades.
REFERENCES:
patent: 1792363 (1931-02-01), Dehuff
patent: 1818261 (1931-08-01), Koch et al.
patent: 4205572 (1980-06-01), Weiner
patent: 4657428 (1987-04-01), Wiley
Kundrat Andrew V.
Mattern Jr. Roy E.
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