Pusher Having Retractable Dog Patents (Class 144/245.6)
  • Patent number: 6578461
    Abstract: The combination of a rip fence and a workpiece pusher are provided for a table saw or shaper. A preferred workpiece pusher moves along a track having a central portion aligned with the feed direction and having two end portions skewed with respect to the feed direction so that the workpiece pusher retracts into the rip fence at both limits of its travel. This allows a sawyer to retract the workpiece pusher on the infeed side of a table saw and begin a ripping operation in which he or she manually pushes the workpiece into the saw blade until the trailing end of the workpiece is close enough to the saw blade that the workpiece pusher can be moved out of the fence to engage the trailing end of the stock. The pusher can then be used to push the workpiece the rest of the way past the blade. This apparatus also allows a woodworker to operate a table-mounted cutting tool without using a workpiece pusher of the invention that is installed on that table.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: June 17, 2003
    Inventor: Larry Y. S. Loo
  • Patent number: 6463645
    Abstract: An apparatus for mounting a hookplate to a bedrail, including a device that transports bedrails into a hookplate receiving position, a hopper that stores hookplates, a first hookplate pusher sliding under the hopper and pushing a fallen hookplate, a second hookplate pusher clamping onto the hookplate and pushing the hookplate into a hookplate mounting position, a pin supply chamber, pin drivers to determine whether the apertures in the bedrail and hookplate are properly aligned, a holding plate temporarily holding pins, the pin drivers then driving their respective pins into the apertures in the bedrail and hookplate to securely fasten the assembly.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: October 15, 2002
    Assignee: B and H Panel Company
    Inventors: Herbert L. Mitchell, James A. Morton, Joseph Nalevanko
  • Publication number: 20020060132
    Abstract: Anti-jam J-bar structure for handling workpieces, such as lumber, in a workpiece transport system, such as a lumber sorter. Workpieces travel in a single, common flow direction in the system, and are handed-off through a transfer zone between upstream and downstream conveyors, the latter one of which is equipped with the proposed J-bar structure. The J-bars in this structure include spring-biased, pivoted articulation between inner and outer components, and this articulation allows anti-jam yielding and accommodation to occur should a J-bar inadvertently and incorrectly engage a workpiece.
    Type: Application
    Filed: January 7, 2002
    Publication date: May 23, 2002
    Inventors: Michael Richard Kloster, Bernard Martin Brady