Liquid purification or separation – With repair or assembling means
Reexamination Certificate
1998-11-09
2001-08-28
Walker, W. L. (Department: 1723)
Liquid purification or separation
With repair or assembling means
C210S243000, C210S272000, C210S273000, C210S275000, C210S459000, C210S460000, C210S502100, C285S008000
Reexamination Certificate
active
06280619
ABSTRACT:
TECHNICAL FIELD
The invention relates generally to filters and more particularly to inline filters having a swivel fitting on at least one end.
BACKGROUND ART
Filters are commonly used to purify liquids such as water. Inline filters, which have an inlet at one end out an outlet at the other, are convenient for many different filter applications.
An inline filter, in its simplest form, is merely a hollow vessel holding a filtration medium that has an inlet port at one end and an outlet port at the other end. Typically, associated with the inlet and output ports are fittings for connecting supply and drain tubing.
A common fitting is a “right-angle” fitting that allows the supply and drain tubing to connect to the inlet and outlet ports at right angles to the axis of the tubing, facilitating a compact or convenient tubing arrangement in certain applications. Prior filters have included right angle fittings integral to their ports. Unfortunately, constructing an inline filter with right-angle fittings as integral with the ports fixes their coupling angles.
If such a filter has a circular cross section, then it may be possible for the entire filter to be rotated within its mounting to adjust the coupling angles of the fittings. However, rotating the filter causes both fittings rotate the same angle. There is no way to adjust the radial coupling angles of the fittings with respect to each other.
What is needed is a filter construction that allows for independent adjustment of the radial angles of right-angle fittings for inline filters.
DISCLOSURE OF THE INVENTION
It is therefore an object of the present invention to provide an inline filter that has right-angle fittings that can rotate independently of each other and independently of the filter body.
According to the present invention, the foregoing and other objects and advantages are attained by a filter design and right-angle fitting design which enables the right-angle fittings to rotate with respect to the filter body while maintaining a leak-proof seal.
As an advantage of the present invention, maximum flexibility and adjustability in the routing of source and drain tubing is achieved.
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Baird Michael T.
Lacy Charles R.
Fleming Michael A.
Jester Michael H.
Sta-Rite Industries
Walker W. L.
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