Patents by Inventor Mark M. McCracken

Mark M. McCracken 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).

  • Dental handpiece control apparatus
    Patent number: 4118866
    Abstract: A dental air-water handpiece control system for operating a plurality of handpieces and an air-water syringe including a plurality of control pedals equal in number to the number of handpieces and each having a needle valve responding to the distance the pedal moves when operated. Replaceable control modules are also included, with each module servicing a single handpiece and having a main control valve regulating air-water flow to the handpiece it services. Diaphragms control the operation of the main control valves and a laminated base plate defines channels for air and water flow through the unit.A water pressure regulator and an air gauge are also provided in the system.
    Type: Grant
    Filed: August 16, 1976
    Date of Patent: October 10, 1978
    Assignee: Parkell Products, Inc.
    Inventors: Robert G. Ross, Mark M. McCracken