US 11,808,395 B2
Pneumatic plug with sealing layer
Asim Mohammed Syed, Chanhassen, MN (US); and Micah Thomas Olson, Eagan, MN (US)
Assigned to Cherne Industries Incorporated, Minneapolis, MN (US)
Filed by CHERNE INDUSTRIES INCORPORATED, Minneapolis, MN (US)
Filed on Mar. 10, 2020, as Appl. No. 16/814,124.
Claims priority of provisional application 62/825,196, filed on Mar. 28, 2019.
Prior Publication US 2020/0309309 A1, Oct. 1, 2020
Int. Cl. F16L 55/12 (2006.01); B32B 37/16 (2006.01); F16L 55/11 (2006.01); F16L 55/128 (2006.01); B32B 37/06 (2006.01); B29C 53/60 (2006.01); B29C 53/58 (2006.01); B29D 22/02 (2006.01); B32B 1/08 (2006.01); B32B 38/00 (2006.01)
CPC F16L 55/12 (2013.01) [B29C 53/585 (2013.01); B29C 53/602 (2013.01); B29D 22/02 (2013.01); B32B 1/08 (2013.01); B32B 37/06 (2013.01); B32B 37/16 (2013.01); F16L 55/1141 (2013.01); F16L 55/1283 (2013.01); B32B 2038/0076 (2013.01); B32B 2262/0261 (2013.01); B32B 2262/0269 (2013.01); B32B 2305/72 (2013.01); B32B 2317/22 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for manufacturing a pneumatic plug, the method comprising:
disposing a rubber layer about a mandrel, the rubber layer extending in an axial direction from a first end to a second end forming a tubular member; and
positioning an elastomeric band between the first end and the second end of the tubular member on a top surface of the rubber layer,
wherein
the pneumatic plug comprises a first end having a maximum outer diameter positioned at a first terminus of the tubular member, a second end having a maximum outer diameter positioned at an opposing terminus of the tubular member, and the tubular member extending between the first end and the second end, and,
the tubular member comprises an unexpanded state and an expanded state, wherein in the unexpanded state the tubular member has a cylindrical configuration in which an outer diameter of the tubular member about which the elastomeric band is positioned is the same as the maximum outer diameter of first end and the maximum outer diameter of the second end.