Breakaway hub for saw
First Claim
1. A saw blade assembly comprising:
- an arbor;
a first blade collar mounted to the arbor;
a saw blade having an aperture receiving the arbor;
a first washer interposed between the first blade collar and the blade; and
at least one shear pin coupling the first washer to the first blade collar, wherein upon a sudden blade stop the shear pin fractures to de-couple the first washer from the first blade collar.
1 Assignment
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Accused Products
Abstract
A blade assembly for a saw having a blade that rotates about an arbor includes a blade collar, first washer, saw blade, second washer, and arbor nut mounted onto the arbor. The first washer has integral shear pins that engage voids of the blade collar, coupling the blade collar to the first washer. To electrically isolate the saw blade, the first washer is made of an electrically insulating material, and also includes a hub that extends into the aperture of the blade, electrically insulating the blade from the arbor. The arbor nut secures the blade assembly to the arbor. Upon an emergency brake being applied to the blade, the shear pins shear, de-coupling the blade collar from the first washer, minimizing damage to the drive system and allowing for a rapid stop of the blade.
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Citations
47 Claims
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1. A saw blade assembly comprising:
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an arbor;
a first blade collar mounted to the arbor;
a saw blade having an aperture receiving the arbor;
a first washer interposed between the first blade collar and the blade; and
at least one shear pin coupling the first washer to the first blade collar,wherein upon a sudden blade stop the shear pin fractures to de-couple the first washer from the first blade collar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A saw blade assembly comprising:
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an arbor having a reduced diameter portion;
an electrically insulating sleeve surrounding at least the reduced diameter portion of the arbor;
a first blade collar mounted to the arbor;
a saw blade having an aperture receiving the arbor, the saw blade mounted onto the electrically insulated reduced diameter portion of the arbor;
a first washer interposed between the first blade collar and the blade, the first washer being made of an electrically insulating material;
at least one shear pin coupling the first washer to the first blade collar; and
a fastener securing the saw blade to the arbor, wherein upon a sudden blade stop the shear pin fractures to de-couple the first washer from the first blade collar. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A saw blade assembly comprising:
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an arbor;
a saw blade having an aperture receiving the arbor, the saw blade having at least one void; and
a first blade collar mounted to the arbor, the first blade collar juxtaposed the saw blade, the side of the first blade collar juxtaposed the saw blade having at least one void; and
at least one shear pin placed within the saw blade void extending into the first blade collar void, coupling the blade to the first blade collar, wherein upon a sudden blade stop the shear pin fractures to de-couple the blade from the first blade collar. - View Dependent Claims (45, 46, 47)
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Specification