Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent
1988-07-26
1989-06-20
Massie, IV, Jerome W.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Floor-working
125 14, E21C 4700
Patent
active
048404314
ABSTRACT:
A portable rotary power saw comprising a housing having mounted at its aft end a pair of rear wheels and a handlebar assembly. Mounted at the fore end of the housing a rotary cutting blade and a vertically adjustable axle having a pair of front wheels. Located between the rear and front wheels within the housing is a stationary axle mounted upon a pair of bearings which permit the axle to pivot. The saw includes a height adjustment mechanism comprising a segment, a latch, and a cable and lever assembly for operating the latch. One leg of the segment is supported by the stationary axle and connected to the adjustable axle by a pair of arms. The other leg of the segment includes a plurality of notches spaced along its length and it extends through the top of the housing. The latch is located on top of the housing immediately adjacent the notched leg and is capable of pivoting in and out of engagement with the notches. The segment is biased such that when a user squeezes the lver and exerts a vertically downward force upon the handlebar assembly, the adjustable axle extends vertically downward relative to the housing. Alternatively, when the user discontinues squeezing the lever, the latch engages one of the notches of the segment thereby locking the segment and the adjustable axle into a predetermined position.
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Materials concerning Christensen Concrete & Asphalt Saw C--84, (1983).
Diamond Products, Inc.
Massie IV Jerome W.
Spahn Gay Ann
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