Original Publication Date: 1981-May-01
Included in the Prior Art Database: 2005-Feb-11
U.S. Patent 3,801,142 shows (Fig. 4) the structure of a disposable rotary seal. The rotatable fluid coupling includes a seal bearing assembly which is made of a felt ring supported in a housing of metal or other rigid material and acts as a bearing which supports and guides the lower rotating seal element. This article describes a plastic bushing which eliminates the felt ring.