# US 2014/0197220 A1 · Reversion trigger for combustion-powered fastener-driving tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197220 A1 - Document ID: US20140197220A1 - Status: Published application - Kind: A1 - Application number: 13/741,533 - Filed: 2013-01-15 - Published: 2014-07-17 - Earliest claimed: 2013-01-15 - Assignees: Illinois Tool Works Inc. - Applicants: Illinois Tool Works Inc. - Inventors: Daniel J. Birk - Web page: https://patentgrep.com/patent/US20140197220A1 ## CPC - B25C 1/08: operated by combustion pressure - B25C 1/008: {Safety devices} - B25C: HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS (for shoemaking A43D) ## Abstract A fastener-driving tool has a housing including a combustion chamber, where the combustion chamber generates combustion for driving a fastener, and a processor associated with the housing and in communication with the combustion chamber. The processor is configured to cause an initial combustion in the combustion chamber and cause a fastener to be driven when a first actuation event and a second actuation event occur, and is configured to cause at least one subsequent combustion in the combustion chamber and cause at least one additional fastener to be driven when only the first actuation event occurs. ## Claims ### Claim 1 A fastener-driving tool comprising: a housing including a combustion chamber; and a processor associated with said housing and in communication with said combustion chamber, said processor configured to cause an initial combustion in said combustion chamber and cause a fastener to be driven when a first actuation event and a second actuation event occur, and said processor configured to cause at least one subsequent combustion in said combustion chamber and cause at least one additional fastener to be driven when only said first actuation event occurs. ### Claim 2 (depends on 1) The tool of claim 1, further comprising a workpiece contact element movably connected to said housing, said workpiece contact element being actuated when it is pressed against a workpiece, wherein said first actuation event includes an actuation of said workpiece contact element. ### Claim 3 (depends on 2) The tool of claim 2, further comprising a trigger movably connected to said housing, said trigger being actuated when a user presses said trigger and moves said trigger from a rest position to an actuated position, wherein said second actuation event includes an actuation of said trigger. ### Claim 4 (depends on 2) The tool of claim 2, further comprising a trigger movably connected to said housing and an actuation lever movably connected to said trigger, wherein each actuation of said workpiece contact element actuates said actuation lever. ### Claim 5 (depends on 1) The tool of claim 1, wherein said processor is configured to cause at least one subsequent combustion in said chamber to drive at least one additional fastener each time said first actuation event occurs until said first actuation event has not occurred for a designated period of time. ### Claim 6 A fastener-driving tool including a trigger control mechanism operable in a sequential actuation mode and a contact actuation mode, said tool comprising: a housing; a workpiece contact element movably connected to said housing, said workpiece contact element being movable between a rest position and an activated position; a trigger movably connected to said housing; an actuation lever movably connected to said trigger; a trigger assembly including a stem, said stem being movable between a rest position and an activated position; and a processor associated with said housing, wherein said processor is configured to cause the tool to operate in the sequential actuation mode to cause a fastener to be driven into a first location on the workpiece when said workpiece contact element is pressed against the workpiece thereby moving said workpiece contact element to said activated position, and said trigger is moved to a pressed position causing said actuation lever to move said stem to said activated position; and wherein said processor is configured to cause the tool to operate in the contact actuation mode to drive at least one additional fastener into a second location on the workpiece when said trigger is held in said pressed position and said workpiece contact element is pressed against the workpiece causing said actuation lever to contact and move said stem to said activated position. ### Claim 7 (depends on 6) The tool of claim 6, wherein upon occurrence of a designated event, the tool switches from the contact actuation mode to the sequential actuation mode. ### Claim 8 (depends on 7) The tool of claim 7, wherein the designated event includes at least one of: the trigger being released and the stem not moving to said activated position for a designated period of time. ### Claim 9 (depends on 8) The tool of claim 8, wherein said designated period of time is 1 to 3 seconds. ### Claim 10 (depends on 6) The tool of claim 6, further comprising a sleeve positioned adjacent to said workpiece contact element and movably connected to said combustion chamber, wherein said sleeve is movable between a first position, wherein said combustion chamber is open, and a second position, wherein said combustion chamber is closed. ### Claim 11 (depends on 10) The tool of claim 10, further comprising a lockout device associated with said housing, said lockout device configured to temporarily hold said sleeve in said second position for a designated period of time. ### Claim 12 (depends on 11) The tool of claim 11, wherein said designated period of time is 100 msec. ### Claim 13 (depends on 6) The tool of claim 6, wherein the first and second locations are different. ### Claim 14 A fastener-driving tool comprising: a housing; a combustion chamber in said housing; a workpiece contact element movably connected to said housing and movable between a rest position and an activated position; a trigger movably connected to said housing; and an actuation lever movably connected to said trigger; wherein in a sequential actuation mode, combustion is generated in said combustion chamber to drive a fastener into a workpiece each time said workpiece contact element and said trigger are each moved from said rest position to said activated position in a designated sequence, and wherein in a contact actuation mode, said trigger remains in said activated position and combustion is generated in said combustion chamber to drive at least one additional fastener into the workpiece each time said workpiece contact element is moved to an activated position by depressing said workpiece contact element on the workpiece. ### Claim 15 (depends on 14) The tool of claim 14, wherein said actuation lever includes a bias member configured to bias said actuation lever. ### Claim 16 (depends on 14) The tool of claim 14, further comprising a sleeve associated with said workpiece contact element, said sleeve configured to move between a closed position wherein said sleeve closes said combustion chamber, and an open position wherein said sleeve does not close said combustion chamber. ### Claim 17 (depends on 16) The tool of claim 16, further comprising a lockout device configured to temporarily hold said sleeve in said closed position for a designated period of time. ### Claim 18 (depends on 17) The tool of claim 17, wherein said designated period of time is 100 msec.