×

Low volume vacuum toilet assembly

  • US 6,148,860 A
  • Filed: 11/27/1996
  • Issued: 11/21/2000
  • Est. Priority Date: 09/09/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A duckbill valve having an integral body of elastomeric material with a Type A durometer between 40-70, and having a tubular inlet portion at a first end with a diameter of less than 2 inches, and side walls tapering down to sealing edges at a second end opposite the first end, the side walls and sealing edges having predetermined thicknesses;

  • and wherein the ratio of wall thickness to sealing edge thickness is about 1;

    1.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×