Shaft seal

• US 4,108,447 A
• Filed: 08/12/1977
• Issued: 08/22/1978
• Est. Priority Date: 08/12/1977
• Status: Expired due to Term

• Current Assignee: Harold W. Scholin
• Original Assignee: Harold W. Scholin
• Inventors: Scholin, Harold W.
• Primary Examiner(s): Ward, Jr., Robert S.
• Application Number:
  US05/823,999
• Time in Patent Office: 375 Days
• Field of Search: 277/9, 277/9.5, 277/10, 277/11, 277/47-50, 277/149, 277/152, 277/153, 277/157, 277/163, 277/164, 277/165, 277/206 R, 277/212 R, 277/212 C, 277/212 F , 277/212 FB, 277/216
• US Class Current: 277/553
• CPC Class Codes: F16J 15/3268 Mounting of sealing rings
• CPC Class Codes: F16J 15/3276 with additional static sealing between the sealing, or its casing or support, and the surface on which it is mounted

Abstract

A shaft seal adapted to be inserted into the bore of a housing and around a shaft therein is disclosed, wherein an annular elastomeric sealing ring is molded to provide an annular sealing lip around the inner diameter thereof, and an annular groove extending inwardly from one surface thereof in an axial direction. A separate and removable spring ring in the groove expands the seal outwardly against the wall of the bore, and a garter spring in the groove compresses the sealing lip against the shaft. If desired, a reinforcing ring may also be positioned in the groove between the bottom thereof and an end of the spring ring.

Claims

1. A shaft seal assembly adapted to be inserted into the bore of a housing and around a shaft therein comprising,

(a) an annular molded elastomeric sealing member having an annular sealing lip on the inner diameter thereof adapted to be in sealing engagement with a shaft in said bore,

(b) the surface of the outer diameter of said sealing member being in engagement with the inner surface of the bore in which it is located,

(c) an annular recess in said sealing member extending inwardly in an axial direction from one side of said member,

(d) spring means in said recess adapted to yieldingly urge said sealing lip into sealing engagement with the shaft,

(e) a separate and removable reinforcing ring member having the surfaces thereof extending in a radial direction and positioned against the bottom of said annular recess in unsecured relation to said sealing member, and

(f) a separate and removable split spring ring member, substantially rectangular in cross-section, positioned in said annular recess outwardly of said reinforcing ring member, and adapted to yieldingly urge the surface of the outer diameter of said sealing member into sealing engagement with the inner surface of the bore, the inner surface of said split spring ring member bearing against said reinforcing ring to hold said reinforcing ring in place and prevent outward movement thereof.