Abstract: An apparatus is provided for crimping fittings to hose assemblies. A pair of drive rollers are used for rotating a fitting. A pair of deflector rollers are positioned opposite of the drive rollers. A fitting and hose assembly is placed between the drive rollers and the deflector rollers. The deflector rollers and the drive rollers include a raised portion for producing a crimp in the fitting, thereby expeditiously securing the fitting to the hose and providing a leakproof connection.

Abstract: A coupler for connecting the service port of a refrigeration fluid-containing system to an exit conduit has a stem threadably for axial movement within the coupling body between a first open position when fully advanced and a second closed position when fully retracted. A plunger axially extends from sealing means in the stem into a service port collar and unseats spring biased sealing means, permitting passage of refrigeration fluid, when the stem is in a substantially fully advanced position and the service port of a refrigeration fluid-containing system is positioned in a service port collar. When the stem is threadably retracted from a substantially fully advanced position, the plunger assumes a retracted position insufficient to unseat the spring biased sealing means and thereby prevents passage of refrigeration fluid.

Abstract: A coupler for a refrigeration system easily snaps and locks in position over a service port and securely seals the coupler with respect thereto. A tubular outer body includes a first set of cavities which captures a first set of rotatable spherical balls A tubular inner body is located within the outer body and includes a second set of cavities for capturing second set of rotatable, spherical balls. The inner body includes a recess therein for selectively receiving the first set of balls from said outer body. The inner surface of the inner body defines an interior which includes a spring-loaded plunger. When the coupler is placed over a service port, the barrel of the service port enters the interior of the inner body and the plunger means contacts a spring-loaded ball valve causing it to open. At the same time, the first set of balls drops into a recess in the service port and the inner body moves forward with the service port against the biasing of an inner body spring.