Floating seal
AssigneeKomatsu Ltd.
InventorYukio Kometani
Life of this patent
Estimating the term…
Abstract
To prevent premature wear and damage of elastic rings caused by fine grained soil, floating rings 22, 24 are supported by corresponding housings 20, 21 through associated elastic rings 23, 25. The elasticity of the elastic rings causes the floating rings 22, 24 to contact each other. When the housings rotate relative to each other, the floating rings 22, 24 slide with respect to each other. An elastic layer 28, 29 is arranged on a contact surface of a portion of a contact surface of each floating ring 22, 24 or a contact surface of each housing 20, 21 with respect to the corresponding elastic ring located closer to an opposing portion 22a, 24a of the floating ring 22, 24.
Claims9
A floating seal comprising a pair of housings, which are relatively rotatable on a common axis, wherein each housing supports a floating ring with an elastic ring in between, the floating rings being slidably sealed together by the elasticity of the elastic rings,
- the floating seal further comprising, at a contact portion between each floating ring and the corresponding elastic ring and at least at a portion of each floating ring that is located closer to a sealing side, tight contact means is arranged in at least one of the floating ring and the elastic ring, the tight contact means maintaining the contact portion in a tight contact state, wherein a rough surface is formed on each of a contact surface of the floating ring that faces the elastic ring and a contact surface of the housing that faces elastic ring.
Dependencies are inferred from the claim text.