Patents Assigned to Fraser Sweatman, Inc.
  • Scavenger valve attachment for inhalation sedation system mask
    Patent number: 4219020
    Abstract: A mask mounted scavenging valve attachment to scavenge gas emitting from an inhalation sedation system to the ambient environment.
    Type: Grant
    Filed: August 9, 1978
    Date of Patent: August 26, 1980
    Assignee: Fraser Sweatman, Inc.
    Inventor: Ronald J. Czajka
  • Analgesic apparatus
    Patent number: 4015617
    Abstract: A gas flow control system including a control for varying the flow rate of only one of two gaseous components forming an analgesic mixture to selectively vary the relative proportions thereof up to a pre-established maximum concentration of the one component and a control to vary the total flow rate of these components without varying the relative proportions thereof. Flow meters are provided to measure the relative flow rates and thereby determine the concentration of the gaseous components.
    Type: Grant
    Filed: March 25, 1975
    Date of Patent: April 5, 1977
    Assignee: Fraser Sweatman, Inc.
    Inventor: Edward A. Connolly