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US 6,295,910 B1Granted
Clutch assembly for use with a circular saw
AssigneeS-B Power Tool Company
InventorsDaniel K. Childs, Michael Holzer, Jan P. Houben
Life of this patent
Estimating the term…
Abstract
A circular saw includes a clutch assembly to surround the rotating blade shaft of the saw. The blade shaft is rotated by a shaft having a gear at one end. The clutch assembly includes a clutch gear to engage with the rotating pinion. The clutch gear is held to the blade shaft by a shaft washer that has a frictional material laminated to one end. The shaft washer is pressed to the clutch gear by spring washers.
Claims24
A circular saw comprising:
- a rotating shaft having a radially extending pinion at one end;
- a blade shaft to rotate a saw blade, the blade shaft having a first end and a second end wherein the blade is secured to the second end by a fastener, and
- a clutch assembly surrounding the first end of the shaft wherein the clutch assembly includes:
- a clutch gear having a center hole through which the first end of the clutch shaft extends and a gear arrangement around the outer perimeter to engage with the pinion, a first and a second spring means positioned on either side of the clutch gear, and a first and second shaft washer pressed against the clutch gear by the spring means, and
- wherein the pinion rotates the clutch assembly to drive the blade shaft, and the clutch, and the clutch assembly overcomes the torque between the clutch gear and the clutch shaft when the clutch shaft is locked by the blade.
2 more elements
A circular saw comprising:
- a rotating shaft having a radially extending pinion at one end;
- a blade shaft to rotate a saw blade, the blade shaft having a first end and a second end wherein the blade is secured to the second end by a fastener, and
- a multi-surface clutch assembly surrounding the first end of the clutch shaft wherein the clutch assembly includes:
- a clutch gear having a center hole through which the first end of the clutch shaft extends and a gear arrangement around the outer perimeter to engage with the pinion, a laminated washer assembly positioned on one side of the clutch gear having at least one gear washer sandwiched between shaft washers, and a gear washer and a spring means on the other side of the clutch gear, and
- wherein the pinion rotates the clutch assembly to drive the blade shaft, and the clutch assembly, and the clutch assembly overcomes the torque between the clutch gear and the blade shaft when the clutch shaft is locked in position by the blade.
2 more elements
A power tool comprising:
- a rotating shaft;
- a second shaft having a first end and a second end wherein a member is secured to the second end, and
- a clutch assembly positioned between the rotating shaft and the second shaft wherein the rotating shaft rotates the clutch assembly drive the second shaft and the member and wherein the clutch assembly overcomes the torque between the clutch assembly and the second shaft when the member is locked while the rotating shaft rotates.
Dependencies are inferred from the claim text.