Abstract: An evaporator connection assembly in an automobile refrigerant system interconnects the inlet and outlet pipes or lines of an evaporator to supply and suction lines for connection to the condenser and compressor. The assembly utilizes a connection block comprising two halves, namely a plate and block. The block is fixedly connected to the evaporator pipes and the plate is connected to the supply and suction lines. The two halves are thereafter secured to one another. Planar seal surfaces are provided between the block and plate for receiving a sealing washer.

Abstract: A sealed connector for an automotive air conditioning system compresses a sealing ring between accurately ground, axially opposed sealing surfaces of a pair of mated connector blocks that are bolted together. A steel retainer to which the sealing ring is molded prevents it from being blown out under high pressure, and one of the connector blocks is relieved to accommodate the retainer, thereby preventing interference with the clamping of the blocks. Seal compression is even and complete.

Abstract: A variable flow restrictor valve is disclosed that is adapted to be inserted in a fluid line to provide first and second alternative flow paths therethrough in accordance with the pressure differential between inlet and outlet ends of the valve. The assembly is characterized by use of a moveable orifice tube which defines one of the alternative paths and an intermediate part of a valve housing defines a flow path which forms another alternative flow path having flow therethrough regulated by a stop disk and a valve disk both of which are fixed to the orifice tube on either side of the intermediate part to position the valve disk to either close or open the another alternative flow path in accordance with the aforesaid pressure differential.

Abstract: A telescoping connector for a coupling assembly is disclosed having a first telescoping tubular member connected to a fluid line and a second telescoping tubular member. The second tubular member includes internal threads adapted to engage cooperating external threads on the first tubular member. The first tubular member is integrally attached to the fluid line and the threads of the second telescoping tubular member are threaded over the threads on the first tubular member and run out. The threads on the second tubular member can then axially slide over a limited neck portion of the first tubular member defined by the distance between its threads and a shoulder formed thereon. This telescoping axial movement enhances the connection process of solid wall, stationary fluid lines. A dual O-ring assembly prevents fluid leakage between the telescoping tubular members.

Abstract: A two-stage elastomeric refrigerant seal has a seal body with a primary seal section adapted for low compression and a secondary seal section adapted for high compression. The seal body is secured to a retainer in an arrangement such that the secondary seal provides pressure assisted sealing on the seal body from the sealed gas acting on the primary seal and in addition provides physical shielding of the primary seal from the refrigerant and any contaminants therein.