Brake cartridge for power equipment
First Claim
Patent Images
1. A brake cartridge for use in safety systems for power tools, the cartridge comprising:
- a housing;
a brake pawl associated with the housing and adapted to pivot relative to the housing;
a spring at least partially endosed in the housing and adapted to pivot the brake pawl relative to the housing when the spring expands;
a fuse wire adapted to hold the spring in compression;
circuitry enclosed in the housing and adapted to fuse the fuse wire to release the spring;
a plug associated with the housing and adapted to engage a corresponding plug in the power tool;
an aperture in the housing configured to receive a key; and
a switch enclosed in the housing and adapted to be activated by the key when the cartridge is installed in the power tool, where activation of the switch by the key indicates the cartridge is installed in a power tool.
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Accused Products
Abstract
Safety systems for power equipment, and components and brake cartridges for use in those safety systems, are disclosed. The safety systems, components and brake cartridges are specifically applicable for woodworking equipment such as saws. An exemplary brake cartridge includes a housing, a brake pawl, a spring, a fuse wire, circuitry a plug, an aperture for a key, and a switch activated by the key to indicate the cartridge is installed.
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Citations
16 Claims
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1. A brake cartridge for use in safety systems for power tools, the cartridge comprising:
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a housing; a brake pawl associated with the housing and adapted to pivot relative to the housing; a spring at least partially endosed in the housing and adapted to pivot the brake pawl relative to the housing when the spring expands; a fuse wire adapted to hold the spring in compression; circuitry enclosed in the housing and adapted to fuse the fuse wire to release the spring; a plug associated with the housing and adapted to engage a corresponding plug in the power tool; an aperture in the housing configured to receive a key; and a switch enclosed in the housing and adapted to be activated by the key when the cartridge is installed in the power tool, where activation of the switch by the key indicates the cartridge is installed in a power tool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A brake cartridge for use in safety systems for power tools, the cartridge compnsing:
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a housing; a brake pawl associated with the housing and adapted to pivot relative to the housing; a spring at least partially enclosed in the housing and adapted to pivot the brake pawl relative to the housing when the spring expands; a fuse wire adapted to hold the spring in compression; circuitry enclosed in the housing and adapted to fuse the fuse wire to release the spring; a plug associated with the housing and adapted to engage a corresponding plug in the power tool; an aperture in the housing configured to receive a key; a switch associated with the housing and adapted to be activated by the key when the cartridge is installed in the power tool, where activation of the switch by the key Indicates the cartridge, is installed in a power tool; a rotatable bushing held by the housing and defining at least part of the aperture, where rotation of the key in the a aperture causes the bushin to rotate; and an actuator adjacent the switch and adapted to move when the bushing rotates, where a movement of the actuator activates the switch. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A brake cartridge for use in safety systems for power tools, the cartridge comprising:
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a housing; a brake pawl associated with the housing and adapted to pivot relative to the housing; a spring at least partially enclosed in the housing and adapted to pivot the brake pawl relative to the housing when the spring expands; a fuse wire adapted to hold the spring in compression; circuitry enclosed in the housing and adapted to fuse the fuse wire to release the spring; a plug associated with the housing and adapted to engage a corresponding plug in the power tool; a key; an aperture in the housing configured to receive the key; and a switch enclosed in the housing and adapted to be activated by the key when the cartridge is installed in the power tool, where activation of the switch by the key indicates the cartridge is installed in a power tool. - View Dependent Claims (16)
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Specification