Patent ID: 11927269
Assignee: BLACK & DECKER, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A seal for a butterfly valve assembly comprising:
an end cap;
an inner tubular side wall attached at one end to the end cap; and
an outer tubular side wall attached at the one end to the end cap and which surrounds the inner tubular side wall and extends in a same direction as the inner tubular side wall to provide a first gap between the inner tubular side wall and outer tubular side wall;
wherein at least the inner tubular side wall is made from a resiliently deformable material,
wherein the end cap comprises an annular base and a rim attached to the annular base, and
wherein the inner tubular side wall attaches to the annular base adjacent the inner edge of the annular base to form a tubular passage of uniform circular cross section through the whole length of the inner wall and the annular base.