End cap assembly for air spring

Spring devices – Vehicle – Comprising compressible fluid

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Details

267122, F16F 904

Patent

active

048528617

ABSTRACT:
An air spring is formed by an axially spaced end cap and a piston member and has an intervening elastomeric flexible sleeve extending therebetween which forms a fluid pressure chamber. An annular clamp ring having a recess on the inner diameter thereof coacts with a corresponding annular projection formed on the end cap to positionally locate the ring on the end cap. A pair of clamping surfaces are located on opposite sides of the projection and are separated therefrom by expansion grooves. The annular projection and clamping surfaces form a series of pinch areas with the intervening sleeve, which sealingly clamp the sleeve therebetween. The expansion grooves receive portions of the sleeve and change the direction of reinforcing cords within the sleeve. The clamp ring abuts against a radially extending surface of the end cap to reduce axial movement of the ring during operation of the air spring. An annular groove which is formed in the end cap traps and conceals the uncompressed end of the sleeve which extends beyond the clamp ring to increase the holding power of the clamp ring.

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patent: 4787608 (1988-11-01), Elliott

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