B - Operations – Transporting – 27 – F
Patent
B - Operations, Transporting
27
F
B27F 7/02 (2006.01) B25C 1/08 (2006.01) B25C 1/18 (2006.01)
Patent
CA 2110952
In a fastener-driving tool comprising a housing structure defining an axis and a nosepiece extending from the housing structure, a primary actuating structure is movable between a tool-disabling position And a tool-enabling position, and a secondary actuating structure is coactive with the primary actuating structure for moving the primary actuating structure to the tool-enabling position when the secondary actuating structure is pressed firmly against a workpiece. The primary actuating structure is biased to the tool- disabling position by a primary spring or springs. The secondary actuating structure is biased away from the primary actuating structure by secondary springs. When the secondary actuating structure is pressed firmly against a workpiece, the primary spring or springs exhibit a biasing force less than the biasing force exhibited by the secondary springs. The secondary actuating structure may be also biased away from the housing structure by a tertiary spring.
Berry Robert J.
Howard Frank C.
Finlayson & Singlehurst
Illinois Tool Works Inc.
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