Tube fitting with sealant
AssigneeSwagelok Company
InventorPeter C. Williams
Life of this patent
Estimating the term…
Abstract
A tube fitting (50) that uses two basic components, namely a fitting body (54) and a fitting nut (52). The nut (52) and body (54) are adapted to be threadably coupled together by relative rotation therebetween. The nut (52) includes an integral tube gripping ring (80) that may be separable from the nut upon pull-up of the fitting. The tube gripping ring and nut (52) form a trepan in which a sealant (400) is disposed.
Claims26
A tube fitting, comprising:
- a first fitting component having an interior bore adapted to receive a conduit end and a camming surface at one end thereof, wherein said first fitting component has an annular end surface outside said camming surface;
- a conduit gripping element;
- second fitting component that is joinable with the first fitting component such that the conduit gripping element is forced into engagement with said camming surface of the first fitting component, wherein the second fitting component defines an interior end surface that is radially outward of the conduit gripping element;
- a sealant material disposed in the second fitting component that upon pull-up of the fitting is on the internal end surface of the second fitting component and on the annular end surface of the first fitting component and is squeezed between said annular end surface of the first fitting component and the internal end surface of the second fitting component.
A tube fitting, comprising:
- a first fitting component having an interior bore adapted to receive a conduit end and a camming surface at one end thereof,
- a conduit gripping element;
- second fitting component that is joinable with the first fitting component such that the conduit gripping element is forced into engagement with said camming surface of the first fitting component, wherein the second fitting component defines an interior end surface that is radially outward of the conduit gripping element;
- a sealant material disposed in the second fitting component that is compressed between the first fitting component and the interior end surface of the second fitting component upon pull-up of the fitting;
- wherein said conduit gripping element is attached to the second fitting component and wherein said interior end surface of said second fitting component is an end surface of a trepan that is defined radially outward of said conduit gripping element.
A tube fitting, comprising:
- a first fitting component having an interior bore adapted to receive a conduit end and a camming surface at one end thereof,
- a conduit gripping element;
- second fitting component that is joinable with the first fitting component such that the conduit gripping element is forced into engagement with said camming surface of the first fitting component, wherein the second fitting component defines an interior end surface that is radially outward of the conduit gripping element;
- a sealant material disposed in the second fitting component that is compressed between the first fitting component and the interior end surface of the second fitting component upon pull-up of the fitting;
- wherein said conduit gripping element is attached to the second fitting component and is separable from said second fitting component upon pull-up of the fitting.
A tube fitting, comprising:
- a body having an interior bore adapted to receive a conduit end;
- said bore having a camming surface at one end thereof;
- a nut that is joinable with the body, the nut including an attached conduit gripping element, wherein the nut defines an interior end surface that is radially outward of the conduit gripping element;
- a sealant material disposed in the nut that is squeezed between the body and the interior end surface of the nut upon pull-up of the fitting.
A component of a fitting for gripping and sealing a conduit end, comprising:
- a nut having an interior surface;
- a gripping element attached to said nut;
- a trepan with an end surface that is radially outward of the gripping element;
- and
- a sealant disposed inside said nut in contact with the trepan end surface.
A method of forming a seal between a threaded fitting nut, a threaded fitting body, and a tube, wherein said threaded fitting nut further comprises both a trepan and a tube gripping element that engages said tube when said threaded fitting body is pulled up against said threaded fitting nut, comprising:
- depositing a sealant in said trepan of said threaded fitting nut;
- placing said threaded fitting nut around said tube;
- engaging said threaded fitting body with said threaded fitting nut;
- tightening said threaded fitting body onto said threaded fitting nut such that said tube gripping element deforms and embeds itself in said tube and said sealant is squeezed between an end wall of the trepan and the fitting body and forms a fluid seal around the nut, body and tube.
Dependencies are inferred from the claim text.