US 4,094,102 AGranted

Oscillating cut-off saw

OwnerRobert Lavern Lauze, deceased, by Vicki Suzanne Brown, administratorinventors

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Abstract

A grinding wheel is rotatably mounted on the end of the boom which pivots about a horizontal shaft on its other end. The shaft is suitably mounted on a frame which is disposed thereunder which is, in turn, mounted on a pair of stationary horizontal tracks to enable the frame to move perpendicularly to the shaft. An elevation control hydraulic piston and cylinder assembly is coupled between the boom and frame to rotate the boom upward. A horizontal control piston and cylinder assembly is coupled to the frame and an anchor to move the frame along the tracks. A hydraulic pump provides pressurized liquid to both cylinders through a valving arrangement. The valving arrangement has an automatic timer that alternately supplies pressurized fluid to the head end and to the rod end of the horizontal control cylinder while this cylinder progressively causes the frame to advance along the tracks.

Claims7

Dependent claims

A power saw comprising:

a stationary bed having four upright posts, two of which are disposed at the two rear corners of a rectangle and the other two at the forward corners;
a pair of parallel and horizontal disposed rods, each of which is mounted by its ends near the top of two of said posts so that said rods extend fore and aft;
a relatively narrow frame having a top edge and a pair of opposing and alligned beams extending outwardly from said frame at said top edge thereof;
a pair of bearing means, each of which is fixed to one of said beams and make sliding 360.degree. bearing contact around and with a respective one of said rods so that said frame depends from and between said rods;
a horizontally disposed axle mounted on the top edge of said frame and disposed perpendicularly to said rods;
a boom mounted on and disposed to rotate about said axle so that one end of said boom extends forward of said axle and the other end extends rearwardly of said axle;
a rotatable saw, rotatably mounted on the forward end of said boom;
a motor mounted on the rear end of said boom and having means for coupling energy to said saw to rotate said saw;
a first fluid piston and cylinder assembly, horizontally disposed and having one end directly engaging said frame and the other end fixed to said stationary bed for moving said frame along said rods;
and
a second fluid piston and cylinder assembly having one end coupled to said boom and the other end coupled to said frame near the lowest portion thereof for maximum vertical movement of said saw by maximum stroke of said second assembly.

8 more elements

Dependencies are inferred from the claim text.