Non-terminating double containment fitting
AssigneeFit-Line, Inc.
InventorFrank F. Hayes, JR.
Life of this patent
Estimating the term…
Abstract
A double containment fitting for connection to a double containment tubing system with an outer, secondary containment tubing surrounding an inner, primary tubing. The fitting includes a fitting body defining a central passageway, the fitting body having a center portion disposed between opposed first and second body ports. The fitting body is configured to receive the tubing system into the first body port. The central passageway has a diameter in the first port selected to allow the secondary tubing into the first body port. A connection system mechanically secures the secondary tubing to the first body port.
Claims17
A double containment fitting for connection to a double containment tubing system with an outer, secondary containment tubing surrounding an inner, primary tubing, with an annular space between the inner and outer tubing, the fitting comprising:
- a fitting body defining a central passageway, the fitting body having a center portion disposed between opposed first and second body ports;
- the fitting body configured to receive the tubing system within the first body port;
- the central passageway having a first diameter in the first port selected to allow the secondary tubing into the first body port;
- a connection system for mechanically securing the secondary tubing to the first body port, the system comprising:
- a first external threaded surface on a first portion of the first body port;
- a tapered portion of the first body portion extending from the first portion and surrounding the central passageway, the tapered portion having a first thickness which tapers from a first thickness adjacent the first external threaded surface to a reduced thickness adjacent a tip of the first port;
- a threaded nut having internal threads and configured to engage the external threaded surface on the first body port;
- a sleeve configured to fit within the threaded nut and over the tapered portion, and to apply a compression force on the tapered portion of the first body port as the nut is threaded onto the external threaded surface to compress the tapered portion onto the secondary tubing to form a mechanical connection between an internal surface of the tapered portion and the outer, secondary tubing of the tubing system to fix the outer tubing in place within the fitting body;
- wherein the nut is made of a material which is harder than the material or materials from which the sleeve, the fitting body and the tubing are fabricated;
- and
- wherein the second port includes an externally threaded surface configured to engage a nut for attachment of the fitting to a wall or bulkhead.
A double containment fitting for connection to a double containment tubing system with an outer, secondary containment tubing surrounding an inner, primary tubing, with an annular space between the inner and outer tubing, the fitting comprising:
- a fitting body defining a central passageway, the fitting body having a center portion disposed between opposed first and second body ports;
- the fitting body configured to receive the tubing system through the central passageway and the first and second body ports;
- the central passageway having a first diameter in the first port selected to allow the secondary tubing into the first body port, the central passageway having a second diameter in the second port, the first diameter larger than the second diameter;
- a connection system for mechanically securing the secondary tubing to the second body port, the connection system comprising:
- a first external threaded surface on a first portion of the second body port;
- a tapered portion extending from the first portion and surrounding the central passageway;
- a threaded nut having internal threads and configured to engage the external threaded surface on the second body port;
- a sleeve configured to fit within the threaded nut and over the tapered portion, and to apply a compression force on the tapered portion of the second body port as the nut is threaded onto the external threaded surface to compress the tapered portion onto the secondary tubing.
Dependencies are inferred from the claim text.