Abstract: The invention relates to a measurement coupling for fluid systems, for taking working pressures or temperatures of the fluid media, consisting of a coupling bushing which is under duct pressure in the built-in state, and in the bore of which is arranged a spring-loaded and mechanically actuatable check valve, the check valve being constructed as a valve body provided with a cylindrical bore and a closed bottom face, the end of the coupling bushing facing the fluid system being prolonged beyond the valve body. A radial transverse bore or a radial slot is located in the wall of the valve body. In a further embodiment of the invention, the radial transverse bore or the transverse slot is formed in the wall of the guide part of the valve body and a flow slot channel is formed between the valve body and the coupling bushing as far as the radial transverse bore or transverse slot.

Abstract: A hose coupling device for multiple hose connections having a tightly fitted hose fitting comprises a plug portion, hose fitting means hose fitting pins and a socket portion consisting of a flange adaptor section and a spacer section. The flange adaptor section comprises a flange adaptor means having a plurality of bores, a releasable plate means connected to the flange adaptor means with a clamping bolt having a central bore receiving a guide pin means. The spacer section comprises a shell means with a plurality of bores for registering with the flange adaptor section bores and means connecting the spacer section bores to the releasable plate means.

Abstract: A safety retainer for threaded coupling elements of a valved bush includes a deformable friction locking ring for a threaded safety cap or tube coupling nut adapted to be secured to the bush; a flexible retainer for the cap connected to the locking ring; a special cap nipple insertable into the bore of the bush; a sealing ring in the bore of the bush for engaging the cap nipple; and a tapered tube connector sealing nipple arrangement that engages the sealing ring in the bush in a special manner to preserve the life of the seal. The cap or coupling nut is threaded on the bush and is forced over the locking ring which elastically deforms to hold the cap or nut against unintentional loosening. The cap is held captive by the retainer when it is loosened and removed, and the tube coupling sealing nipple cooperates with the valve in the bush in a desired manner while it does not damage the seal ring in the tube connector side of the bore of the bush. Specific forms of locking rings are disclosed.