Abstract: A tube fitting with either single or double ferrule swage design common in one system, in one ISO 8434-1 system, being made up of connecting bodies, swaging ferrules and driving nuts, and being a single ferrule design when using one swaging ferrule and being a double ferrule design when using a sealing ferrule and a holding ferrule as the swaging ferrule. The single ferrule tube fitting provides at first a sole smooth-swaged joint for sealing by a sealing cantilever of the ferrule head wedge, and then a depression-swaged joint for fastening by an inner edge of the ferrule head wedge, an operation stopping feel for installation by a ferrule tail wedge, and an isolation of the ferrule head from the tail overdriven motion by an automatic radial outward warp of the middle of the ferrule, resulting in being able both to deliver a definite installation-stopping feel and tolerate any overdrive installation.

Abstract: A trapezoid-sectional annular sealing arrangement, including a trapezoid-sectional annular cavity and gasket or packing used to realize the sealing connection of two fluid-containing members connected by fastening threads or bolts, wherein the said annular gasket or packing is enclosed in the said annular cavity formed by the said two fluid-containing members as joined together by fastening threads or bolts, the said trapezoid is disposed to converge radially and inward, the annular gasket or packing has a sectional area slightly bigger than the sectional area of the annular cavity, and the annular cavity is preferably designed to completely sink into one face of the two end faces to be joined. The sectional area and gyro-radius of the annular gasket with a material thermal expansion coefficient different from the annular cavity will either increase or decrease in response to temperature changes at the same time relative to the annular cavity to enhance or retain the original sealing connection.

Abstract: A stem seal used either a triangle-sectional bushing as stem cylinder seals or a ball wedge/spherical seat mating as stem shoulder seals can individually withstand the same pressure as the burst pressure of bodies without failure. The sectional triangle of the triangle-sectional bushing is truncated to provide a wearing and compressing allowance for the bushing, but will be again a full triangle or an untruncated triangle when the bushing is fully worn. The ball wedge/spherical seat mating is a mating which uses ball wedges as a stop shoulder of stems and the spherical seat as a stop seat at stem exits.

Abstract: A set of eccentric dowel pins and a pin-adjusted structure can move interlocking features of a hole type modular tooling system directly and continuously along axes without rigging and indicating, and thus provide full flexibility to such a hole type modular tooling system.

Abstract: A modular method and system for setting fixed angles or revolving triads of interlocking holes of a hole type modular tooling system which are critically embodied in seven fixed-angle setting disks in each of which there are a few triads of holes that form certain angles. Selective use of not more than two of four disks can set up any fixed angles in 0.5.degree. increments, or selective use of not more than four of the seven disks can set up all the fixed angles in 30" increments. This modular system offers full angular adjustability, and permits precise and fast setups of small and compact constructions with good rigidity and stability.