Abstract: A portable tie-down device detachably mounted to a recessed anchor having a plurality of crossbars. The tie-down device includes a stationary stabilizer plate having a like plurality of depending torque lugs engaging the sides of the crossbars and a body member rotatable between two positions and having a like plurality of engaging dogs alignable with the torque lugs in one position and engageable with the anchor crossbars in the other position for detachably securing the tie-down device to the anchor. A manually operable locking bolt carried by the body member and selectively engageable with a locking groove in the stabilizer mechanically locks the rotatable body member to the stabilizer on the one position, thereby locking the tie-down device to the anchor.

Abstract: A coupling for closed fluid systems, such as refrigeration systems, wherein components of the refrigeration system may be precharged with refrigerant, and upon interconnection of the couplings communication between the components is established. The couplings include male and female members each having a passage sealed by a frangible diaphragm. The male member includes a tubular extension having an outer end sealed by a diaphragm whose periphery is axially slidably mounted upon the extension and interconnection of the coupling members engages the male member diaphragm with an abutment surface on the female member, preferably the female diaphragm, restraining the male diaphragm from axial displacement as the members are interconnected. The male extension passes through the diaphragms upon both members piercing and folding the ruptured diaphragms upon the exterior surface of the extension completely clearing the passage defined between the coupling members.