Gas line pierce valve

A valve structure for a refrigerating pipe line comprising a body having a pipe receiving groove on a face thereof, a clamp plate having a face fitting against said body face having a complementary pipe receiving groove, means for clamping said faces together thereby embracing said pipe line in said grooves and securing said valve structure on said pipe line, a stem projecting from said body having a bore therein with its axis transverse to the axis of said body groove, a nipple projecting from said body having a bore with its axis transverse to and intersecting with the stem bore within said body forming a continuous fluid passageway, a screw valve axially movable within the bore of said stem, said screw valve having a pierce point at the inner end which can be moved through an aperture through the body between said fluid passageway and said body groove, said valve having a conical valve surface adjacent said pierce point for engaging a valve seat surrounding said aperture, said valve having external threads extending outwardly from said valve surface and engaging internal threads within said body, an enlarged head at the outer end of said valve with a circumferential groove, an O-ring in said circumferential groove of a size to fit within said bore while squeezed between the end shoulders of said groove thereby forming a seal with said body during axial adjustment of said screw valve in which said clamp plate has on a face fitting against said body, a pair of upwardly projecting ridges forming between them a rounded semi-circular groove, the radius of said groove being smaller than the radius of said body groove and said ridges extending for a substantial distance into said body groove to thereby rigidly clamp between said body and said plate a tube of the size of the groove between said ridges in which said clamp plate has two parallel flat faces, one of said faces having the aforesaid ridges and the opposite face being free from ridges but having a groove with its axis at right angles to the axis of the groove formed by said ridges, whereby said clamping plate may be used for securing two different size tubes by alternately clamping the one or the other face of the plate to said body.

A valve structure for a refrigerating pipe line comprising a body having a pipe receiving groove on a face thereof, a clamp plate having a face fitting against said body face having a complementary pipe receiving groove, means for clamping said faces together thereby embracing said pipe line in said grooves and securing said valve structure on said pipe line, a stem projecting from said body having a bore therein with its axis transverse to the axis of said body groove, a nipple projecting from said body having a bore with its axis transverse to and intersecting with the stem bore within said body forming a continuous fluid passageway, a screw valve axially movable within the bore of said stem, said screw valve having a pierce point at the inner end which can be moved through an aperture through the body between said fluid passageway and said body groove, said valve having a conical valve surface adjacent said pierce point for engaging a valve seat surrounding said aperture, said valve having external threads extending outwardly from said valve surface and engaging internal threads within said body, an enlarged head at the outer end of said valve with a circumferential groove, and an O-ring in said circumferential groove of a size to fit within said bore while squeezed between the end shoulders of said groove thereby forming a seal with said body during axial adjustment of said screw valve in which said clamp plate has on a face fitting against said body, a pair of upwardly projecting ridges forming between them a rounded semi-circular groove, the radius of which is smaller than the radius of said body groove and said ridges extending into said body groove and said clamp plate has a second face parallel to said first face having a groove therein at right angles to the groove on said first face, said second face being free from ridges, said two faces being alternatively clamped to said body by said cap screws whereby two different size tubes may be secured to the valve structure.