Patents by Inventor R. John Clark

R. John Clark has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7389605
    Abstract: A self clearing single and/or multiple spent shell catcher for use on autoloading guns comprising a plurality of pivoting spring loaded jaws with cam features which are released by a jaw trigger means and thereby catch an ejected shell. Caught shells are automatically cleared from said jaws by a reciprocating parking handle which actuates said jaws into shell catching and shell holding/stabilizing positions and places caught shells in a retention area in preparation for catching a subsequent ejected shell. The spent shell catcher removably straddles the guns ejection port by means of a plurality of dovetail like connections which are adhesively or mechanically attached to the gun and automatically position the device in proper relation to the ejection port.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: June 24, 2008
    Inventor: R. John Clark
  • Patent number: 5470038
    Abstract: A portable, self-stabilizing folding seat support for use on ground conditions of various consistencies comprising a rigid main shaft, a plurality of pivoting stabilizer feet and stabilizer feet brackets attached to the base of the main shaft, and an adjustable stabilizer shaft which can be extended beyond the base of the main shaft and pivoting stabilizer feet to various positions. A removable stabilizer shaft cross bolt is used to fix the adjustable stabilizer shaft in various degrees of extension in relation to the main shaft and stabilizer feet, and a retention leash flexibly attaches the stabilizer shaft cross bolt to the main shaft and prevents its loss. The seat support may be used to provide a self-stabilizing seating platform on soft unstable ground conditions by vertically thrusting the extended stabilizer shaft into the soft ground or mud so that the extended stabilizer feet engage the soft surface.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: November 28, 1995
    Inventor: R. John Clark