# US 2014/0151427 A1 · Fastener driving device with mechanisms to limit movement of nails > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151427 A1 - Document ID: US20140151427A1 - Status: Published application - Kind: A1 - Application number: 14/175,711 - Filed: 2014-02-07 - Published: 2014-06-05 - Earliest claimed: 2006-10-20 - Assignees: Stanley Fastening Systems, L.P. - Applicants: Stanley Fastening Systems, L.P. - Inventors: Prudencio S. Canlas, JR.; Jeff Peng; Hao Chang; Adam C. Tillinghast - Web page: https://patentgrep.com/patent/US20140151427A1 ## CPC - B25C 1/005: {for rows of contiguous nails} - B25C: HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS (for shoemaking A43D) ## Abstract A fastener driving device includes a housing assembly, a nose assembly connected to the housing assembly, a magazine for carrying a supply of fasteners through a feed channel along a feed direction toward the nose assembly, and a plurality of stop pawls independently movable about a common pivot axis. Each stop pawl has a distal end extending into the feed channel. ## Claims ### Claim 1 A fastener driving device, comprising: a housing assembly; a nose assembly connected to the housing assembly; a magazine for carrying a supply of fasteners through a feed channel along a feed direction toward the nose assembly; and a plurality of stop pawls independently movable about a common pivot axis, wherein each stop pawl has a distal end extending into the feed channel. ### Claim 2 (depends on 1) A fastener driving device according to claim 1, wherein adjacent distal ends are spaced apart from each other along the feed channel. ### Claim 3 (depends on 2) A fastener driving device according to claim 2, wherein the spacing between the adjacent distal ends is less than a shank diameter of the fastener. ### Claim 4 (depends on 1) A fastener driving device according to claim 1, wherein each of the plurality of stop pawls includes a pivot extension protruding from the cover to disengage the distal end from the feed channel. ### Claim 5 (depends on 1) A fastener driving device according to claim 1, wherein the plurality of stop pawls are connected to the nose assembly by a stop pawl pivot. ### Claim 6 (depends on 1) A fastener driving device according to claim 1, wherein the plurality of stop pawls are biased by springs to resist movement of the distal ends out of the feed channel. ### Claim 7 A fastener driving device for providing a fastener into a workpiece, comprising: a housing assembly; a nose assembly connected to the housing assembly, the nose assembly having a drive channel; a magazine for carrying one of a supply of first fasteners and a supply of second fasteners through a feed channel along a feed direction to the nose assembly, the first and second fasteners having different lengths; at least one nail stop provided along an upper portion of the nose assembly to engage the first fasteners; and a movable nail stop having a distal end provided along a lower portion of the nose assembly and extending into the feed channel to engage and prevent the second fasteners from receding into the nose assembly, wherein the distal end of the movable nail stop is positioned for contact by the first fastener. ### Claim 8 (depends on 7) A fastener driving device according to claim 7, wherein the movable nail stop is pivotally mounted to the nose assembly and biased by a spring to retractably provide the distal end into the feed channel. ### Claim 9 (depends on 7) A fastener driving device according to claim 7, wherein the distal end includes a ramp surface to allow the first fasteners to engage and pivot the movable nail stop out of the feed channel. ### Claim 10 (depends on 9) A fastener driving device according to claim 9, wherein the distal end includes an abutment surface engaging a head portion of the second fasteners. ### Claim 11 A fastener driving device for providing first fasteners having a first length and second fasteners having a second length shorter than the first length into a workpiece, comprising: a housing assembly; a nose assembly connected to the housing assembly; a first nail stop provided in the nose assembly for engaging head portions of the first fasteners; and at least one movable nail stop provided in the nose assembly for engaging head portions of the second fasteners, wherein the at least one movable nail stop is adapted to movably extend into a position to prevent the second fasteners from receding into the nose assembly. ### Claim 12 (depends on 11) A fastener driving device according to claim 11, wherein the at least one movable nail stop movably extends between two adjacent first fasteners. ### Claim 13 (depends on 11) A fastener driving device according to claim 11, further including a second nail stop provided in the nose assembly for engaging head portions of the first fasteners, said first nail stop and said second nail stop preventing the first fasteners from receding into the nose assembly. ### Claim 14 (depends on 11) A fastener driving device according to claim 11, wherein the nose assembly includes a drive channel for driving the first and second fasteners, and the at least one movable nail stop is positioned immediately adjacent to the drive channel. ### Claim 15 (depends on 14) A fastener driving device according to claim 14, wherein the movable nail stop extends along a direction parallel to the drive channel. ### Claim 16 (depends on 15) A fastener driving device according to claim 15, wherein the movable nail stop is mounted to the nose assembly by a nail stop pivot that extends along a direction perpendicular to the drive channel. ### Claim 17 (depends on 16) A fastener driving device according to claim 16, wherein the movable nail stop is biased into the feed channel by the nail stop pivot and a spring. ### Claim 18 (depends on 11) A fastener driving device according to claim 11, further comprising a plurality of stop pawls extending into the feed channel at a position below the movable nail stop. ### Claim 19 A system for preventing misalignment of fasteners within a fastener driving device, the fasteners having different first and second lengths, the system comprising: a drive channel to expel the fasteners into a workpiece; a feed channel providing the fasteners to the drive channel along a feed channel direction; a plurality of stop pawls positioned for engagement by each of the fasteners within the feed channel; and a plurality nail stops including a first nail stop positioned for engagement by head portions of the fasteners having the first length, a second nail stop for engagement by head portions of the fasteners having the first length, and a movable nail stop positioned for engagement by head portions of the fasteners having the second length and engagement by shank portions of the fasteners having the first length, wherein the movable nail stop is movably provided within the feed channel between the first nail stop and at least one of the plurality of stop pawls. ### Claim 20 (depends on 19) A system for preventing misalignment according to claim 19, wherein the plurality of stop pawls engage and prevent movement of the fasteners having the different first and second lengths along a direction opposite to feed channel direction, and the plurality of nail stops prevent the fasteners having the different first and second lengths from receding into the drive channel. ### Claim 21 A fastener driving device configured to drive fasteners having different lengths, the fastener driving device comprising: a nose assembly having a drive channel; a magazine for carrying supplies of fasteners having different lengths through a feed channel along a feed channel direction toward the nose assembly; a first stop pawl having a distal end adapted to extend from one side of the feed channel into the feed channel between a first fastener and an adjacent second fastener; and a second stop pawl having a distal end adapted to extend from the one side of the feed channel into the feed channel between the first fastener and the adjacent second fastener, the first stop pawl being positioned closer to the drive channel than the second stop pawl, wherein the first stop pawl and the second stop pawl are configured to engage and prevent movement of fasteners having different lengths along a direction opposite to the feed channel direction.