GB1016738A - Fluid seal - Google Patents

Abstract

1,016,738. Shaft seals. VICTOR MANUFACTURING & GASKET CO. July 30, 1963, No. 30187/63. Heading F2B. In a shaft seal comprising an elastomer ring 6 secured in a casing and having a lip 7 urged radially inwards by a garter spring 8, the lip and the spring are shielded from the sealed fluid by a sleeve 12 which is fixed to the casing and has a portion 14 disposed between the lip 7 and the shaft 15. The ring 6 is bonded to an inner shell 4, 5 telescoped in an outer shell 1, 3 that is a fluid-tight fit in the shaft housing 2 and the sleeve 12 is clamped between an L-ring 11 and a washer 16; the assembly being clamped together by a flange 17 on the outer shell. The ring 6 may be of Buna N or Neoprene and the sleeve 12 may be of p.t.f.e., Nylon or Adiprene. In a modification, Fig. 2 (not shown), the ring 6 has a further lip that engages the shaft on the side of the seal remote from the sealed fluid to prevent ingress of grit &c. In a further modification, Fig. 3 (not shown), for a double seal the ring 6 has two lips, each urged inwardly by a garter spring and protected by a sleeve secured to adjacent ends of the casing. In a still further modification, Fig. 5 (not shown), the sleeves 38, 39 engage a cylinder 35 which is enclosed in the seal casing to form a unitary seal and is secured on the shaft 36 by an elastomer wall 37.