Patents Assigned to Progessive Machine Products, Inc.
  • Pinch valve syringe
    Patent number: 4108178
    Abstract: A syringe is provided which is particularly useful in dental work for emitting a stream of water and air under high pressure into the patient's mouth. The syringe of the invention is simplified as compared with the prior art syringes in that it uses pinch valves to perform its intended functions.
    Type: Grant
    Filed: April 28, 1977
    Date of Patent: August 22, 1978
    Assignee: Progessive Machine Products, Inc.
    Inventor: Frank A. Betush