Patent ID: 6412525
Filing Date: 2002-07-02
Classification: B60C

Abstract:
A device for filling or deflating a tire, fillable with air and secured to a wheel of a vehicle, such as a tractor, a first connecting port in the wheel rim of the wheel, said device comprising:a housing having a second connecting port with a bore connecting to the first connecting port on the wheel; an inner member supported in the housing such that both the inner member and housing are rotatable relative to each other; a third connecting port connecting to a connection leading to a pressure supply means; a controllable valve connected to the second connecting port; an annular chamber connected to the second connecting port and the third connecting port, said annular chamber formed between the housing and the inner member; and two seals laterally closing off the annular chamber, said seals arranged between the housing and the inner member, said seals fixed on one of the housing or the inner member and contacting in a sealed way and mating faces connected to the other by pressurization of the annular chamber, said seals being formed rotationally symmetrically to a longitudinal axis and each seal having an annular attachment portion with a first outer diameter, a first wall portion starting from said attachment portion, said first wall portion departs from the longitudinal axis to an apex, said apex having a second diameter, said apex being continuous with a second wall portion, said second wall portion being axially distanced from the first wall portion and the attachment portion and extending towards the longitudinal axis, said second wall portion ending in an axially projecting sealing lip, said sealing lip being arranged on a third diameter, said sealing lip abutting the mating face, wherein a relationship applies, such that an annular face between the first diameter and the second diameter is larger than an annular face between the second diameter and the third diameter, and said seals being axially elastic.