US 6,981,512 B2 | ||
Tubular flow conduit with in-line integrated check valve and method of making same | ||
David L. Meyer, Archbold, Ohio (US) | ||
Assigned to Dana Corporation, Toledo, Ohio (US) | ||
Filed on Aug. 19, 2003, as Appl. No. 10/643,705. | ||
Prior Publication US 2005/0039798 A1, Feb. 24, 2005 | ||
Int. Cl. F16K 15/04 (2006.01); B21D 1/24 (2006.01); B21D 39/20 (2006.01); B21D 53/10 (2006.01) |
U.S. Cl. 137—15.22 | 15 Claims |
1. A method of assembling a check valve into a tube of deformable material, which comprises:
(a) expanding an end portion of said tube,
(b) forming a valve seat within said end portion expanded in said step (a) where the expanded end portion joins the remainder
of the tube,
(c) positioning a valve element within said expanded end portion with said element seated against said seat, and
(d) deforming said end portion by reducing the diameter of a portion of said end portion to form a valve casing cavity operable
to capture said valve element within said tube for operably opening and closing against said seat by movement of said valve
element in said cavity.
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