US 3,961,550 AGranted

Band saw

OwnerEverett O. Oliver, John T. Millweeinventors

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Abstract

There is disclosed a band saw which can be utilized as a stationary or as a portable tool. The saw is principally designed for portable use with its table in a saw-supporting position, resting on the work, although it can also be utilized in combination with a bench support as a stationary band saw with its table in a work-supporting position. The weight and bulk of the saw are minimal, as necessary for its portable uses, by utilization of a universal adjustment mechanism providing fixed adjustability of the tension and tracking of the saw blade. The saw frame and table are preferably of cast metal to permit simple assembly into a rigid, lightweight tool that is free of frequent maintenance and adjustment. The saw is preferably provided in combination with a bench support for mounting the saw on a work table to provide a stationary band saw.

Claims14

Dependent claims

In a band saw having a frame supporting distal blade wheels including driven and idler blade wheels pivotally mounted thereon, a band saw blade extending between and about said blade wheels, prime mover means coupled in driving relationship to said driven blade wheel, the improved mounting means for the idler blade wheel which comprises:

distal channel means open at one end of said frame;
elongated slot means transverse to said channel means, also open at said distal end of said frame;
slide means in the form of an elongated plate having a tapered inner end and bearing, at its opposite end, threaded shaft means;
boss means on said elongated plate for tracking in said elongated slot and bearing a central bore receiving a blade wheel support shaft projecting therefrom for journalled support of said idler saw wheel;
tension adjustment means comprising a hand wheel threaded on said threaded shaft means and resilient means biased between said hand wheel and said frame whereby the tension load on said saw blade can be fixedly adjusted;
and
tilt adjustment means comprising screw means threadably carried by said frame and projecting into said channel and bearing the tapered end of said slide means whereby the tilt of said idler blade wheel can be fixedly adjusted.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/552,300Filed 24 Feb 1975
Granted: 8 Jun 1976
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B27B 13/00
Band or strap sawing machines
B23D 53/12
Machines or devices for sawing with strap saw-blades which are effectively endless in use, e.g. for contour cutting: hand-held or hand-operated…
B23D 55/02
Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts: of frames; of…
Y10T 83/7245
With means to vary distance between pulley or sprocket axes: and angular relationship of axes