Detection systems for power equipment
First Claim
1. A method for acquiring data related to the triggering of a system designed to detect a dangerous condition between a human and a dangerous portion of a woodworking machine and to trigger some action to mitigate the dangerous condition, where the woodworking machine includes a memory device configured to be removable by a user of the woodworking machine, the method including:
- providing a plurality of such systems;
at least one of such systems detecting a dangerous condition between a human and a dangerous portion of its woodworking machine and triggering some action to mitigate the dangerous condition;
storing data associated with the triggering in the memory device associated with the triggered system;
removing the memory device associated with the triggered system from its woodworking machine; and
reading the stored data from the removed memory device.
2 Assignments
0 Petitions
Accused Products
Abstract
Improved methods to detect when a human body contacts a predetermined portion of a machine are disclosed. The methods distinguish contact with a person from contact with other materials. The methods are particularly applicable in woodworking equipment such as table saws to distinguish contact between a person and the blade of the saw from contact between the blade and wet or green wood.
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Citations
19 Claims
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1. A method for acquiring data related to the triggering of a system designed to detect a dangerous condition between a human and a dangerous portion of a woodworking machine and to trigger some action to mitigate the dangerous condition, where the woodworking machine includes a memory device configured to be removable by a user of the woodworking machine, the method including:
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providing a plurality of such systems; at least one of such systems detecting a dangerous condition between a human and a dangerous portion of its woodworking machine and triggering some action to mitigate the dangerous condition; storing data associated with the triggering in the memory device associated with the triggered system; removing the memory device associated with the triggered system from its woodworking machine; and reading the stored data from the removed memory device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for acquiring data related to the triggering of a system designed to detect a dangerous condition between a human and a dangerous portion of a woodworking machine and to take some action to mitigate the dangerous condition, where the system includes a memory device configured to be removable from a woodworking machine equipped with the system, the method including:
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providing a plurality of woodworking machines equipped with such systems; the system in at least one such woodworking machine detecting a dangerous condition between a human and a dangerous portion of the woodworking machine, taking some action to mitigate the dangerous condition, and storing data associated with taking the action in that system'"'"'s memory device; having a person remove a memory device having stored data from its associated woodworking machine; collecting the removed memory device; and reading the stored data from the collected memory device. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for acquiring data related to the triggering of a detection system designed to detect a dangerous condition between a human and a dangerous portion of a woodworking machine, wherein the detection is based on the response of at least one detection scheme that has a response level that crosses a first threshold level when a dangerous condition is present, and wherein some events other than a dangerous condition can cause a response level in the detection scheme spanning the first threshold level for a dangerous condition, whereby such other events may cause the detection system to falsely detect a dangerous condition when no such dangerous condition is present, the method including:
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providing a plurality of woodworking machines, each equipped with such a detection system; providing each such woodworking machine with a response system configured to react to the detection of a dangerous condition, where the reaction involves emergency activation of a danger mitigation device; monitoring the response level while operating the machine; stopping the machine without emergency activation of the danger mitigation device if the monitored response level crosses a second threshold that lies between a nominal response level of the detection system when no dangerous condition or other response level affecting events are present and the first threshold level; triggering the emergency activation of the danger mitigation device if the monitored response level crosses the first threshold level; storing data associated with the triggering in a memory device associated with the detection system; accessing the stored data; and reading the stored data from the memory device.
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Specification