The dashed broken lines in the figures illustrate portions of the vacuum break twist tap that form no part of the claimed design.
The dashed broken lines in the figures illustrate portions of the vacuum break twist tap that form no part of the claimed design.
Number | Name | Date | Kind |
---|---|---|---|
2028101 | Fredrickson | Jan 1936 | A |
3023767 | Woodford | Mar 1962 | A |
3145724 | Pelzer | Aug 1964 | A |
3180352 | Kersten | Apr 1965 | A |
3183924 | Duchin | May 1965 | A |
D223094 | Coleman et al. | Mar 1972 | S |
D278740 | Bolgert | May 1985 | S |
D309173 | Stipe | Jul 1990 | S |
D319866 | Rogers | Sep 1991 | S |
5360029 | Goughneour | Nov 1994 | A |
D426617 | Hansen | Jun 2000 | S |
D500123 | Pelletz | Dec 2004 | S |
D516679 | Tripp | Mar 2006 | S |
D531697 | Hofmann | Nov 2006 | S |
7721755 | Smith | May 2010 | B2 |
8006874 | Smith | Aug 2011 | B2 |
8297299 | Pan | Oct 2012 | B2 |
10227167 | Darby | Mar 2019 | B2 |
Number | Date | Country |
---|---|---|
2011248536 | Mar 2015 | AU |
Entry |
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Aaron Stickley. “Pressure Vacuum Breaker Basics.” The Spruce., May 11, 2019 [online], [retrieved on Jun. 29, 2021]. Retrieved from the Internet <URL: https://www.thespruce.com/pressure-vacuum-breaker-basics-2718896>. |
William Moore. “Best backflow preventer for sprinkler systems.” Lawnista., Sep. 12, 2020 [online], [retrieved on Jun. 29, 2021]. Retrieved from the Internet <URL: https://lawnista.com/best-backflow-preventer-for-sprinkler-systems/>. |
Strivo Technical Datasheet, Rapak-L-300-EN Sep. 2015, © 2015 DS Smith, Plastics Division, Rapak (2 pages). |
TruTap Information Sheet, 495RV-C 525 RV-B WD-L-302-EN Nov. 2016, © 2016 DS Smith, Plastics Division, Worldwide Dispensers (2 pages). |
Creative Dispensing Solutions brochure, © 2018 DS Smith, Plastics Division, Worldwide Dispensers(36 pages). |
Number | Date | Country | |
---|---|---|---|
Parent | 29725090 | Feb 2020 | US |
Child | 29813967 | US |