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US 4,901,604 AGranted
Adjustable automatic dual side grinder with quick retract cam
OwnerJames Emterinventor
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OwnerJames Emterinventor
Estimating the term…
An automatic dual side grinding machine includes a pair of rotary spindles mounted for reciprocating movement with respect to a frame for grinding the teeth of a circular saw from the side. The reciprocating movement is provided by a rotary cam member which provides a program of movement for the spindles in a longitudinal direction wherein the grinding wheels move forward at a first rate of speed for a grinding stroke and move rearward at a second rate of speed for a retraction stroke, the retraction stroke being faster than the forward grinding stroke. The grinding wheels are driven in a rotary fashion by motors affixed to the frame which have output belts looped over pulleys mounted on the ends of the spindles. The pulleys have recessed portions for accommodating the belts and raised beveled edges to prevent the belts from slipping off as the spindles move in forward and reverse motion. A radial angle adjustment feature is provided by a lever arm and a linkage which simultaneously rotates support plates bearing each of the spindles about vertical axes. An improved tangential angle adjustment permits the height of the grinding wheels relative to the saw blade teeth to be adjusted.
A regrinding apparatus for a circular saw comprising:
A regrinding apparatus for a circular saw comprising:
A regrinding apparatus for a circular saw blade comprising:
In a dual side grinding machine for resharpening the teeth of a circular saw blade, wherein said saw blade is held on a rotatable mounting for advancing the teeth of the saw blade one by one into engagement with an index finger, said index finger rotatably mounted about a pivot axis for holding each tooth to be reground in a predetermined vertical position relative to a pair of grinding wheels, the improvement comprising tangential angle adjustment means comprising lever bar means rotatably mounted about a pin and bearing against said index finger, said lever bar means having biasing spring means urging said lever bar means against push rod means.
Dependencies are inferred from the claim text.