Cutlery – Cutting tools – Saw
Patent
1998-10-23
2000-06-06
Payer, Hwei-Siu
Cutlery
Cutting tools
Saw
30506, 30507, B27B 2102
Patent
active
06070330&
ABSTRACT:
A hacksaw of the type utilizing an elongated blade maintained tension between respective legs of the saw frame includes a cam-actuated blade tensioning mechanism. One leg of the saw frame includes a fixed blade pin for receipt through a mounting hole defined at one end of the elongated blade. The other leg of the saw frame includes a pin carrier having a blade pin for receipt through the mounting hole defined at the other end of the elongated blade. The pin carrier is pivotal between a blade release position and a blade securement position. In presently preferred embodiments, the pin carrier defines a cam follower engaging an elliptically arcuate cam surface defined on a pivotal actuator member. The actuator member may have a lever portion for providing mechanical advantage during its pivotal movement. A releasable lock mechanism is provided to maintain the actuator member, and thus the pin carrier, in the blade securement position during use. Preferably, the releasable lock mechanism is configured to require the simultaneous occurrence of two events in order to permit release of the blade.
REFERENCES:
patent: 1446674 (1923-02-01), Thompson
patent: 1517827 (1924-12-01), De Grado
patent: 3636997 (1972-01-01), Keymer
patent: 5826344 (1998-10-01), Phelon et al.
Jollie John D.
Miller Robert F.
Phelon Russell D.
Payer Hwei-Siu
R.E. Phelon Company, Inc.
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