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US 4,823,649 AGranted
Automatic dual side grinder
OwnerJames Emterinventor
Life of this patent
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OwnerJames Emterinventor
Estimating the term…
An automatic dual sidegrinder for a circular saw includes precision adjustments for the tangential grinding angle, the radial grinding angle, and provides a high speed automatic regrinding operation. The tangential angle adjustment is made by a torsion bar that presses against a rotatable index finger stop. The torsion bar is moved by a screw bearing against it mounted in a fixture attached to the frame. The radial angle adjustment is made by turning cams mounted on bolts bored into a frame which are situated in slots cut into movable plates which support rotary grinding spindles. The cams rotate the plates, changing slightly the radial angle of attack of the grinding wheels. The speed of the saw is doubled by indexing the saw on the completion of both a forward and rearward longitudinal stroke of the grinding wheels. The drive motor for the longitudinal motion of the wheels has an output cam shaft with oppositely opposed flats. A switch having an input plunger responds to the flats when the shaft rotates so as to trigger an indexing mechanism which advances the saw one increment of rotation.
In a dual side grinder for resharpening the teeth of a circular saw blade, said dual side grinder comprising a frame supporting a pair of movable plates and having a pair of grinding wheels mounted thereon for grinding the teeth of said circular saw blade from either side thereof, the improvement comprising:
In a dual side grinder for resharpening the teeth of a circular saw blade, wherein said saw blade is held by a rotating spindle for advancing said teeth one by one into engagement with an indexing finger rotatably mounted about a pivot axis for holding each tooth to be resharpened in a predetermined vertical position relative to a pair of grinding wheels, the improvement comprising:
In a regrinding apparatus for a circular saw comprising a frame supporting a pair of spindles, a rotary grinding wheel connected to each of said spindles for engaging the teeth of said circular saw and having tie rod means driven by a motorized cam for driving said spindles in reciprocating fashion along their respective longitudinal axes, said regrinding apparatus further including indexing means for rotating said saw blade about a mounting axis to bring the teeth of said saw blade into position for a regrinding operation one by one, the improvement comprising:
Dependencies are inferred from the claim text.