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Pictures & Descriptions
Array of  Tru-Fit Fittings
Tru-Fit vs. Prior Types
Pushing & Pulling Forces
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Patent No.: US 7,237,808 B2

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Pictures and descriptions demonstrating
the advantages of Tru-Fit fittings




The Tru-Fit fitting has a ball type end versus the previous angled one. The ball or sphere allows the mating flared tube to align from an axis other than straight in. This allows for greater flexibility  and permits greater tolerances of all connecting points. To someone familiar with tube and pipe fittings and their use the difference will be obvious.

    These three pictures display
    a tube with the Tru-Fit design
    flare mated to a male fitting.
    Note the multi-axis capabilities.
    Truly a specialty fitting.


The above four pictures show a male fitting with a cut-away female nut made with the Tru-Fit design. Here you can see how the assembly looks. Note the ball and socket type nature. The tube has a Tru-Fit type inverted flare. A special tube fitting connection using the Tru-Fit specialty fittings.

    The female version of the
    Tru-Fit style fitting.


    The top-left photograph shows
    a cut-away view of the female
    version. The other two photos
    display the multi-axis capability
    using the Tru-Fit method.


    These five pictures show a
    previous design fitting, ferrule,
    tube, and nut combination.
    It does not have the multi-axis
    capabilities of the Tru-Fit design.

    The fitting is a cut-away for clarity.


The above six pictures display the multi-axis rotating ability using a Tru-Fit male fitting, flared tube, and nut.

    These three pictures show
    a 45 degree flare fitting, tube,
    and nut. It doesn't have the
    multi-axis rotating ability.


    These three pictures are of a
    previous design ferrule type
    fitting, nut, and tube. It doesn't
    have the multi-axis rotating


The above four pictures show two off-setting objects being connected with 45 degree flare fittings and tube. The tube must have at least two bends in order to accomplish this. The tube always almost fits!

The tube is always too long, too short, or on the wrong angle. This creates stress between the two objects being connected. There is always a pushing or pulling force which creates tension throughout the connections. By using Tru-Fit fittings this stress may be eliminated.

    Now, using the Tru-Fit design hydraulic
    fittings or air fittings, we will make the
    same type of connection as before.


Bends without bending. By using the Tru-Fit method, the same connection can be made. No bending of the tube is required using these specialty tube fittings. Before tightening the fittings, it is very flexible. After tightening the fittings in the positions required, the connection is very rigid. With the Tru-Fit design one may create a stress-free rigid connection with flexibility.


The same connections can be made using the Tru-Fit ferrule and female fitting design. Bending tubes without bending.

    Using the Tru-Fit female fitting
    and ferrule, the only tool required
    is a simple hand tube and pipe
    cutter. This makes it nice for
    in-the-field repairs!


Here we have a cut-away view of
a telescoping tube using the Tru-Fit
design tube fittings. The larger tube has
a double flare while the smaller tube
has a ferrule.

Note the design of the fitting and
nut. Both the large and small tube
have multi-axis capabilities.


With the ferrule at the end of the small tube there is 20 degrees of axis movement in both tubes.

    These nine pictures display
    the increase in tolerance and
    flexibility by using the Tru-Fit
     Alignment Solutions
     This picture displays a 1/2 inch dia. tube
     with a standard 45 degree flare and a
     standard 1/2 45 degree inverted flare
     fitting used in a typical application. Note
     the tube has to be directly in line and
     has no radial axis capability.
    The part on the right is a cut-away view
     of a standard 1/2 inch 45 degree
     inverted flare fitting. The part on the
     left is a standard 1/2 inch 45 degree
     inverted flare fitting modified per the
     Tru-Fit design.
    This picture shows an inverted flare
    fitting and tube of the Tru-Fit design.
    Note the tube doesn't have to be
    directly in line as with the use of the
    standard 45 degree inverted flare fitting.
    Note the tube doesn't have to be
    directly in line as with the use of the
    standard 45 degree inverted flare fitting.

Click here to see an array of Tru-Fit fittings.

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