Including Screw Drive Patents (Class 254/204)
  • Patent number: 4394004
    Abstract: Disclosed are carpet stretching tools comprising a pair of laterally extending and parallel barbed bars including a lead-bar and a trail-bar, guide means permitting longitudinal movement between the barbed bars while maintaining them in parallelism, and force application means to forceably controllably move the carpet engageable barbed bars into proximity. Preferably, the guide means takes the form of slidably engaged collar and shank, and the force application means includes a longitudinally extending threaded stud firmly attached to one barbed bar and movably surrounded by the other barbed bar, and further includes a controllable handle. Loftily disposed guide shank and force application threaded stud might provide the sole connection between barbed bars to permit ancillary manual operations to be performed therebelow. The barbed bars might be of selectable lateral length appropriate to certain carpet stretching tasks.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: July 19, 1983
    Inventors: James R. Allen, John D. Allen, Robert A. Knigge