Metal tools and implements – making – Saw-making or furbishing device or machine – Sharpening and gumming
Patent
1989-04-03
1990-02-20
Parker, Roscoe V.
Metal tools and implements, making
Saw-making or furbishing device or machine
Sharpening and gumming
B63D 6314
Patent
active
049016040
ABSTRACT:
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.
REFERENCES:
patent: 4366728 (1983-01-01), Beck et al.
patent: 4750387 (1988-06-01), Singer
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