Blade guard arrangement in motor-driven chop saw

Details Blade guard arrangement in motor-driven chop saw Blade guard arrangement in motor-driven chop saw

1988-01-07

1988-10-04

Yost, Frank T.

Cutting

Rotatable disc tool pair or tool and carrier

With guard for tool

83490, 83397, 83DIG1, 30391, 144251R, B23D 1900, B26D 114

Patent

active

047748664

ABSTRACT:
A saw-blade guard arrangement in a motor driven chop saw which includes a new unit pivotally mounted for movement between an upper rest position and a lower operational position. The saw unit is pivotably connected to a hinging member through a pivot shaft, and the unit includes an upper safety guard, a motor casing integral with the upper guard, a saw blade fixed to a drive shaft connected to a motor shaft, and a lower guard rotatable to a first direction for covering a part of the saw blade when the saw unit is in the upper rest position and rotatable to a second direction when the unit is moved to the lower operational position. The blade guard arrangement comprises a first biasing means disposed between the upper safety guard and the hinging member, an operation arm having one end portion pivotally rotatable about the pivot shaft, a link member having one end pivotably connected to the other end of the operation arm and having the other end pivotally connected to the lower guard, a second biasing means disposed between the operation arm and the hinging member, and an adjusting means for controlling orientation of the operation arm.

REFERENCES:
patent: 1711490 (1929-05-01), Drummond
patent: 1900553 (1933-03-01), Hampton
patent: 2737985 (1956-03-01), Utz
patent: 3922785 (1975-12-01), Fushiya
patent: 4002094 (1977-01-01), Erickson et al.
patent: 4028975 (1977-06-01), Bennett
patent: 4176571 (1979-12-01), Batson
patent: 4318324 (1982-03-01), Hall et al.
patent: 4489633 (1984-12-01), van de Wouw
patent: 4581966 (1986-04-01), Kaiser et al.

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