Improvements in or relating to seal assemblies
1,170,069. Centrifugal pumps. QUICKFIT & QUARTZ Ltd. and R.A. BUTTERY. Jan.11, 1967 [Jan. 17, 1966], No.57689/66. Heading F1C. [Also in Division F2] A pump impeller shaft 11 is sealed by means comprising a sleeve 17 having a first end portion 18 and a second end portion 19 joined by an axially compressible central portion 20, the portion 18 being a fluid tight fit on the shaft 11 and a surface 21 on the portion 19 being urged by a spring 22 into sliding sealing engagement with a surface on the pump housing 1, the portion 19 being drivably connected to the pump shaft driving means. The pump is driven by an electric motor 27 and used for pumping corrosive liquids, the housing 1, impeller 12 and shaft 11 being of glass and the latter being reinforced by an internal metal shaft 13. A gasket 168 is clamped between a flange 16a and an end 14 of the housing 1. The shaft 13 is coupled to the motor shaft 26 by a driving member 25 having clamped thereto one end of a metal casing 28, the other end of which has pins 32 engaged in slots in the portion 19. The spring 22 is compressed between a flange 24 of the member 25 and a retaining member-23 abutting the portion 19 and thereby urging the surface 21 against the gasket 168. The sleeve 17 is formed of a synthetic resin material, the surface 21 preferably being reinforced with glass. A carrying handle 40 is provided.