Patent ID: 6834893
Filing Date: 2004-12-28
Classification: B60H,F16L

Abstract:
A block fitting for a CO2 air conditioning system comprising:a male block including a first aperture having a first end and a second end, the first end of the first aperture of said male block adapted to receive a tube end therein, said male block including a female annular bore surrounding the first aperture to form a channel having a generally u-shaped cross-section; a female block including a first aperture having a first end and a second end, the first end of the first aperture of said female block adapted to receive a tube end therein, said female block including an annular collar surrounding the first aperture of said female block and adapted to be inserted into the channel formed by the female annular bore of said male block, at least one of an inner surface of the annular collar and an inner surface of the channel having an annular groove formed therein, the first aperture of said male block and the first aperture of said female block being substantially concentrically aligned; a primary seal disposed adjacent and surrounding the second end of the first aperture of said male block and adjacent and surrounding the second end of the first aperture of said female block; a secondary seal disposed in the annular groove of the annular collar of said female block, said secondary seal comprising a material with low permeation to CO2; and a fastener adapted to engage said male block and said female block to sealingly engage the female annular bore of said male block and the annular collar of said female block.