Patents Examined by Stan L. Stack, Jr.
  • Pump for spray dispenser and the like
    Patent number: 3997086
    Abstract: Pump for spray dispenser has spring-pressed annular piston serving as an accumulator and controlling flow through the pump discharge so that no discharge passes unless and until pressure within the pump housing is sufficiently high.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: December 14, 1976
    Assignee: Summit Packaging Systems, Inc.
    Inventor: Joseph John Shay