Fastening tool
A fastening tool includes an actuation device configured to actuate a drive engine of the tool to initiate a drive stroke. The actuation device includes a contact trip assembly operatively connected to the movable portion of the nose assembly. The contact trip assembly a lower contact arm connected to the movable portion of the nose assembly biased in the retracted position and movable to the extended position with the moveable portion of the nose assembly, and an upper contact arm operatively connected to the lower contact arm. The actuation device includes a trigger assembly that includes a trigger, a trigger arm pivotally supported by the trigger and configured to interact with the upper contact arm, and a check pawl configured to engage an opening in the upper contact arm when the upper contact arm moves downward to prevent the tool from being operated in a contact trip mode.
1. A fastening tool comprising:
a housing having an engine receiving portion;
a drive engine located in the engine receiving portion, the drive engine comprising a cylinder and a piston reciprocally mounted within the cylinder, the piston comprising a driver configured to move along a drive axis to drive a fastener during a drive stroke;
a nose assembly carried by the housing, the nose assembly comprising a fastener drive track configured to receive the driver, and a movable portion biased in a retracted position towards the housing and movable to an extended position away from the housing;
a magazine assembly constructed and arranged to feed successively leading fasteners from a supply of fasteners contained therein into the drive track; and
an actuation device configured to actuate the drive engine to initiate the drive stroke, the actuation device comprising
a contact trip assembly operatively connected to the movable portion of the nose assembly, the contact trip assembly comprising
a lower contact arm connected to the movable portion of the nose assembly biased in the retracted position and movable to the extended position with the moveable portion of the nose assembly, and
an upper contact arm operatively connected to the lower contact arm; and
a trigger assembly comprising
a trigger,
a trigger arm pivotally supported by the trigger and configured to interact with the upper contact arm, and
a check pawl configured to engage an opening in the upper contact arm when the upper contact arm moves downward to prevent the tool from being operated in a contact trip mode.
2. The fastening tool according to claim 1 , wherein the actuation device further comprises a mode selector configured to lock the check pawl in a contact trip mode position to prevent the check pawl from engaging the opening in the upper contact arm when the upper contact arm moves downward.
3. The fastening tool according to claim 2 , wherein the mode selector is configured to position the check pawl in a sequential mode position to allow the check pawl to engage the opening in the upper contact arm when the upper contact arm moves downward.
4. The fastening tool according to claim 1 , wherein the trigger is pivotally mounted to the housing.
5. The fastening tool according to claim 1 , further comprising a trigger guide supported by the magazine assembly, wherein the trigger is supported by the trigger guide and is configured to slide linearly relative to the trigger guide.
6. The fastening tool according to claim 1 , further comprising a dry fire lockout configured to prevent initiation of the drive stroke when a predetermined number of fasteners are in the magazine assembly.
7. The fastening tool according to claim 6 , wherein the dry fire lockout is configured to prevent movement of the trigger.
8. The fastening tool according to claim 7 , wherein the dry fire lockout comprises a first portion configured to extend into the magazine assembly and a second portion supported by the first portion and configured to interact with the trigger.
9. The fastening tool according to claim 8 , wherein the magazine assembly comprises a pusher, and wherein when the first portion of the dry fire lockout is engaged with the pusher, movement of the trigger is prevented.
10. The fastening tool according to claim 6 , wherein the magazine assembly comprises a pusher, and wherein the dry fire lockout includes a protrusion extending from the pusher towards the nose assembly, a lever positioned in the magazine assembly, and a pin connected to the lever, the pin being configured to connect the lower contact arm and the upper contact arm when more than the predetermined number of fasteners are in the magazine assembly and to disconnect the lower contact arm from the upper contact arm when the protrusion moves the lever when the predetermined number of fasteners are in the magazine assembly.
11. The fastening tool according to claim 10 , wherein the predetermined number of fasteners is zero.
12. An actuation device for a fastening tool comprising a drive engine, the actuation device configured to actuate the drive engine to initiate a drive stroke, the actuation device comprising:
a contact trip assembly operatively connected to a movable portion of a nose assembly of the fastening tool, and biased in the retracted position and movable to the extended position with the moveable portion of the nose assembly, the contact trip assembly comprising
a lower contact arm connected to the movable portion of the nose assembly, and
an upper contact arm operatively connected to the lower contact arm; and
a trigger assembly comprising
a trigger,
a trigger arm pivotally supported by the trigger and configured to interact with the upper contact arm, and
a check pawl configured to engage an opening in the upper contact arm when the upper contact arm moves downward to prevent the tool from being operated in a contact trip mode.
13. The actuation device according to claim 12 , further comprising a mode selector configured to lock the check pawl in a contact trip mode position to prevent the check pawl from engaging the opening in the upper contact arm when the upper contact arm moves downward.
14. The actuation device according to claim 13 , wherein the mode selector is configured to position the check pawl in a sequential mode position to allow the check pawl to engage the opening in the upper contact arm when the upper contact arm moves downward.
15. The actuation device according to claim 13 , wherein the trigger is configured to be pivotally mounted to a housing of the fastening tool.
16. The actuation device according to claim 13 , further comprising a trigger guide configured to be supported by a magazine assembly of the fastening tool, wherein the trigger is supported by the trigger guide and is configured to slide linearly relative to the trigger guide.
17. A fastening tool comprising:
a housing having an engine receiving portion;
a drive engine located in the engine receiving portion, the drive engine comprising a cylinder and a piston reciprocally mounted within the cylinder, the piston comprising a driver configured to move along a drive axis to drive a fastener during a drive stroke;
a nose assembly carried by the housing, the nose assembly comprising a fastener drive track configured to receive the driver, and a movable portion biased in a retracted position towards the housing and movable to an extended position away from the housing;
a magazine assembly constructed and arranged to feed successively leading fasteners from a supply of fasteners contained therein into the drive track; and
an actuation device configured to actuate the drive engine to initiate the drive stroke, the actuation device comprising
a contact trip assembly operatively connected to the movable portion of the nose assembly, the contact trip assembly comprising
a lower contact arm connected to the movable portion of the nose assembly biased in the retracted position and movable to the extended position with the moveable portion of the nose assembly, and
an upper contact arm operatively connected to the lower contact arm; and
a trigger assembly comprising
a trigger,
a trigger arm pivotally supported by the trigger and configured to interact with the upper contact arm, and
a dry fire lockout configured to prevent initiation of the drive stroke when a predetermined number of fasteners are in the magazine assembly.
18. The fastening tool according to claim 17 , wherein the dry fire lockout is configured to prevent movement of the trigger.
19. The fastening tool according to claim 18 , wherein the dry fire lockout comprises a first portion configured to extend into the magazine assembly and a second portion supported by the first portion and configured to interact with the trigger.
20. The fastening tool according to claim 19 , wherein the magazine assembly comprises a pusher, and wherein when the first portion of the dry fire lockout is engaged with the pusher, movement of the trigger is prevented.
21. The fastening tool according to claim 17 , wherein the magazine assembly comprises a pusher, and wherein the dry fire lockout includes a protrusion extending from the pusher towards the nose assembly, a lever positioned in the magazine assembly, and a pin connected to the lever, the pin being configured to connect the lower contact arm and the upper contact arm when more than the predetermined number of fasteners are in the magazine assembly and to disconnect the lower contact arm from the upper contact arm when the protrusion moves the lever when the predetermined number of fasteners are in the magazine assembly.
22. The fastening tool according to claim 21 , wherein the predetermined number of fasteners is zero.