Patent ID: 6916022

Claim:
A sealing assembly comprising: a casing; a housing fixed to the casing; a sealing element; a rotary sealing part mounted coaxially with the sealing element and forming therewith a contactless seal between opposed faces of the sealing element and rotary sealing part; a pusher sleeve disposed between the housing and the sealing element and extending coaxially, and in contact, with the sealing element; an auxiliary sleeve mounted coaxially with the pusher sleeve and extending between the pusher sleeve and the housing; biasing means extending between the auxiliary sleeve and the pusher sleeve and urging the pusher sleeve, and therefore the sealing element, axially towards the rotary sealing part; a first sealing member disposed in a channel in the pusher sleeve and engaging the auxiliary sleeve to provide a seal; and a second sealing member extending between the auxiliary sleeve and the housing to provide a seal.