Check valve

• US 2,662,724 A
• Filed: 12/27/1948
• Issued: 12/15/1953
• Est. Priority Date: 12/27/1948
• Status: Expired due to Term

• Current Assignee: Cut Kravagna
• Original Assignee: Cut Kravagna
• Inventors: CUT KRAVAGNA
• Application Number:
  US03/067,266
• Time in Patent Office: 1,814 Days
• US Class Current: 137/847
• CPC Class Codes: F16K 15/147 the closure elements having specially formed slits or being of an elongated easily collapsible form
• CPC Class Codes: F16K 15/1472 the closure elements being fixed onto an internally extending mount
• CPC Class Codes: Y10T 137/7883 With biasing means

Claims