Pipe fitting
OwnerNaris Komolrochanaporninventor
Life of this patent
Estimating the term…
Abstract
A pipe fitting in the form of a male coupler and a female coupler both of which have imbedded therein a threaded metallic insert. Both the male coupler and female coupler have a metallic insert that is constructed to define a treacherous path at the surface boundary of the metal insert so as to minimize the possibility of any leakage exteriorly of the coupler from a liquid conducting bore passing through each of the couplers.
Claims14
A pipe fitting for interconnecting a first pipe section which is slightly axially spaced apart from a second pipe section, a male coupling comprising:
- a male coupler constructed principally of plastic having a first series of external threads;
- a first connector integrally joined to said male coupler, a first through bore being internally formed within said male coupler and said first connector, said first connector adapted to be attached to an end of the first pipe section;
- and
- a first metal insert imbedded within said male coupler and said first connector, said first metal insert having a second series of external threads which are of the same diameter and type as said first series of external threads, said second series of external threads being aligned with said first series of external threads, said first series of external threads and said second series of external threads being joined at a first joint which is spaced from said first through bore, said first metal insert having a second joint with said first connector with said second joint connecting with said first through bore, both said first joint and said second joint being annular, whereby any liquid passing through said first bore may tend to enter at said second joint with the leakage path then terminating at said first joint.
In a pipe fitting for interconnecting a first pipe section which is slightly axially spaced apart from a second pipe section, a female coupling comprising:
- a female coupler constructed principally of plastic having a first series of internal threads;
- a connector integrally joined to said female coupler, a through bore being integrally formed within said female coupler and said connector, said connector adapted to be attached to an end of said first pipe section;
- and
- a metal insert imbedded within said female coupler, said metal insert having a second series of internal threads which are of the same diameter and type as said first series of internal threads, said second series of internal threads being aligned with said first series of internal threads, said first series of internal threads and said second series of internal threads being joined at a first joint which connects with said through bore, said metal insert having a second joint created at the boundary between said metal insert and said female coupler with said second joint being spaced from said through bore, both said first joint and said second joint being annular, whereby a firm grip is provided between said female coupler and said metal insert further reducing gap formation due to shrinkage of plastic after injection molding of said female coupler.
In a pipe fitting for interconnecting a first pipe section which is slightly axially spaced apart from a second pipe section, a female coupling comprising:
- a female coupler constructed principally of plastic having a first series of internal threads;
- a connector integrally joined to said female coupler, a through bore being integrally formed within said female coupler and said connector, said connector adapted to be attached to an end of said first pipe section;
- a metal insert imbedded within said female coupler, said metal insert having a second series of internal threads which are of the same diameter and type as said first series of internal threads, said second series of internal threads being aligned with said first series of internal threads, said first series of internal threads and said second series of internal threads being joined at a first joint which connects with said through bore, said metal insert having a second joint created at the boundary between said metal insert and said female coupler with said second joint being spaced from said through bore, both said first joint and said second joint being annular, whereby a firm grip is provided between said female coupler and said metal insert further reducing gap formation due to shrinkage of plastic after injection molding of said female coupler;
- and
- said metal insert includes at least one notch, one protrusion and one ridge which are imbedded within said plastic of said female coupler to provide additional space where the plastic can flow into during injection molding thereby providing extra bonding between said female coupler and said metal insert resulting in increased strength of said female coupler.
In constructing of a pipe fitting, a coupler having a plastic body within which is imbedded a metal insert, there being created a boundary path between said plastic body and said metal insert, said coupler having a through bore for the passage of a liquid, said boundary path terminating in an internal end and an external end, said internal end connecting with said through bore, said external end terminating on an exterior surface of said coupler, said boundary path being of a substantial contorted length created by a series of at least one notch, one ridge and one groove formed in said metal insert.
Dependencies are inferred from the claim text.