Charles A Short

US Patent:

48079111, Feb 28, 1989

Filed:

Jan 25, 1988

Appl. No.:

7/148037

Inventors:

Charles D. Short - Rochester NY

International Classification:

F16L 1900

US Classification:

285323

Abstract:

Two embodiments of a push in tube fitting converter are disclosed. Each includes a nut, a tube gripping member such as a collet or ring, an O-ring, and a sealing retainer. In one embodiment, the interior of the nut includes a threaded portion at one end, a cylindrical seal seat, and a smaller diameter end cylindrical portion, with an internal shoulder between the threaded portion and the seal seat. The gripping member operatively engages the interior of the nut. The O-ring forms the seal between the seal seat of the nut, and tubing inserted through it. The sealing retainer is engaged by the internal threads of the nut to hold the sealing retainer, O-ring, and gripping member in place within the nut. The sealing retainer engages both the internal shoulder of the nut and a fitting body on which the nut is to be threaded, thereby forming the seal between nut and fitting body. The nut is thereby effective to make sealed connection with a fitting body, and to make gripping and sealed connection with tubing inserted into the nut.