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US 3,981,216 AGranted
Low noise, high speed saw blade
AssigneeLemmon & Snoap Co.
InventorKenneth R. Lemmon
Life of this patent
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AssigneeLemmon & Snoap Co.
InventorKenneth R. Lemmon
Estimating the term…
A high speed circular saw blade exhibiting low operating noise characteristics comprises a plurality of narrow expansion slots up to about 3/32 inches wide formed in the outer edge of the blade at a negative angle of about 5.degree.-15.degree. with respect to a line extending radially from the center of the blade to the slots. Two to five slots are provided in each blade, with the depth of each slot being between about 3/4 to 21/2 inches, depending on the diameter of the blade. Expansion holes are provided at the bottom of each slot, and a further reduction in noise level is achieved by plugging these holes with a resilient material such as solder or the like. With regularly spaced teeth the saw blade functions principally as a "cut-off" saw blade, but by removing every sixth tooth and placing the slots at the forward edges of the elongated spaces or deep gullets left by the missing teeth, the saw blade may be used as a combination cut-off and rip saw blade, with a substantial reduction in noise being achieved in both operations.
In a high speed circular saw blade comprising a plurality of teeth spaced about the outer periphery of the blade, an improvement comprising a plurality of expansion slots formed in the outer edge of the blade at a negative angle of about 5.degree.-15.degree. with respect to lines extending radially from the center of the blade to the outer ends of the expansion slots, said expansion slots being greater than 0 inches and up to about three-thirty seconds (3/32) inches wide.
In a high speed saw blade designed for operation at rotation speeds in excess of 2600 r.p.m. comprising a plurality of teeth spaced about the periphery of the blade, an improvement comprising:
In a saw blade comprising a plurality of carbide tipped teeth spaced about the periphery of the blade, an improvement comprising a plurality of expansion slots formed in the outer periphery of the blade, each expansion slot being formed at a negative angle of about 10.degree.-12.degree., the width of each slot being greater than zero and up to about 3/32 inches, and the length of each slot being at least about 1/16 to 1/8 of the diameter of the blade, each expansion slot having an expansion hole formed at the bottom thereof, with the expansion hole being plugged with a resilient material.
Dependencies are inferred from the claim text.