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US 5,467,656 AGranted
Measurement system for hand tools
AssigneeLiberty Mutual Insurance Company
InventorsPeter R. Teare, Patrice L. Murphy, George E. Brogmus
Life of this patent
Estimating the term…
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AssigneeLiberty Mutual Insurance Company
InventorsPeter R. Teare, Patrice L. Murphy, George E. Brogmus
Estimating the term…
A measurement system for measuring hand tools includes a number of instrumented tools and a data collector. The data collector has a processor which can operate in a task analysis mode in which data is received, stored, and processed over a user-determined period of time. A number of different tools with different adaptor configurations can be coupled to a receptacle on the housing of the data collector. The collector has recognition circuitry for determining which type of tool is plugged into the receptacle, and, in response, the processor retrieves parameters needed to process the data and which are related to the recognized tool. The instrumented tools are designed to simulate actual tools used in the work place, and thus have substantially the same size, shape, weight, weight distribution, and feel of actual working models of the tools. The sensors can include strain gages for measuring force and torque, position detectors for measuring hand position, sensors for measuring grip, accelerometers for measuring acceleration of the tools and sensors for measuring an angle of rotation of a tool.
A system comprising:
An apparatus comprising:
An apparatus comprising:
An apparatus comprising:
An apparatus including an instrumented tool which simulates a working tool used by a worker, the instrumented tool having a sensor for detecting a force exerted by the instrumented tool and for providing a signal indicating the detected force and a cable for carrying the signal, the instrumented tool having about the same weight, weight distribution, size, shape, and feel as the working tool, wherein the instrumented tool includes at least one handle that has approximately the same size, shape and feel as a handle of the working tool.
An apparatus including:
A method for measuring forces exerted by a hand tool when the hand tool is used, the tool having a sensor which provides an input signal relating to the exerted force during a selected time period, the tool being used for a plurality of repetitions, the method comprising the steps of:
A method for measuring forces exerted by a hand tool when the hand tool is used, the tool having a sensor which provides a force signal relating to the exerted force and a position sensor coupling to one of a user's hand or the tool for providing a position signal indicating a position of one of the user's hand or the tool, the method comprising the steps of:
A method for measuring forces exerted by a hand tool when used by a user, the method including the computer implemented steps of:
The hand tool measurement kit including:
An apparatus comprising:
Dependencies are inferred from the claim text.