Patents by Inventor Karl F. Putman

Karl F. Putman 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).

  • Bushing-less stem guided control valve
    Patent number: 5791629
    Abstract: A fluid control valve in which the usual metal stem guide bushings have been eliminated. A fluid control valve includes a valve bonnet and a packing nut threadably engaging the valve bonnet. A valve stem passes through the valve bonnet and the packing nut in a clearance fit so that there is no engagement therebetween. Two packing sets of V-type PTFE packing are included with each set having a middle virgin PTFE sealing ring, a carbon or glass filled PTFE male packing ring on one side and a carbon or glass filled PTFE female ring on the other side. Belleville disk springs are provided intermediate the packing nut and the two packing sets, for supplying live loading to the packing. In an unloaded condition, initially the packing sets both are in a clearance fit with the valve stem.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: August 11, 1998
    Assignee: Fisher Controls International, Inc.
    Inventors: William E. Wears, Charles W. Wood, Karl F. Putman