| US 7,455,301 B2 | ||
| Seamless corrugated insert gasket and method of forming the same | ||
| Tyler Hamilton Ragsdale, Dinwiddie, Va. (US); Robert Adam Riggs, Chesterfield, Va. (US); and Alfred F. Waterland, III, Chesterfield, Va. (US) | ||
| Assigned to Virginia Sealing Products, Inc., Hopewell, Va. (US) | ||
| Filed on Mar. 02, 2006, as Appl. No. 11/366,288. | ||
| Prior Publication US 2007/0205566 A1, Sep. 06, 2007 | ||
| Int. Cl. F16J 15/08 (2006.01); F16J 15/02 (2006.01); F16J 15/10 (2006.01) | ||
| U.S. Cl. 277—627 [277/639; 277/644; 277/650; 277/651; 277/652] | 8 Claims |
| 1. A seamless corrugated insert gasket comprising:
first and second annular rings comprising a polymer selected from the group consisting of PTFE, porous PTFE, expanded PTFE,
filled PTFE and microcellular PTFE, the first and second rings having an inside diameter and an outside diameter, wherein
the width of the first and second rings is the radial distance from the inside diameter to the outside diameter;
an insert comprising a third annular ring of corrugated metal, the insert having an inside diameter greater than the inside
diameter of the first and second rings and an outside diameter less than the outside diameter of the first and second rings;
wherein the insert is sandwiched between the first and second rings, and further wherein the first and second rings are unified
around the insert to form a unitary polymer construction that fully encases the insert in a seamless fashion and wherein the
density of the unitary polymer construction of the finished gasket is between about 0.5 and 2.0 gm/cc;
whereby the gasket is seamless including a seamless inside diameter and a seamless outside diameter.
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