Full-root-radius-threaded wing nut having increased wall thickness

Patent metadata

Field	Value
Publication number	US-2016377207-A1
Application number	US-201615182192-A
Country	US
Kind code	A1
Filing date	Jun 14, 2016
Priority date	Jun 15, 2015
Publication date	Dec 29, 2016
Grant date	—

Abstract

According to one aspect, a hammer union includes a female sub; a male sub; and a wing nut that is concentrically disposed about the female and male subs. The wing nut includes a body having first and second end surfaces, and an exterior surface extending therebetween; a passage extending through the body from the first to second end surface that defines an interior surface of the body; an internal shoulder formed by the interior surface; an internal threaded connection that extends from the first end surface and towards the internal shoulder; and lugs extending radially from the exterior surface. In one aspect, the body has a wall thickness defined between the interior and exterior surfaces, with a greater wall thickness at the internal shoulder than at the first end surface; the internal threaded connection has a full-root radius; and a lug that extends along the axial length of the body.

First claim

What is claimed is:

1 . A hammer union, the hammer union comprising:
a threaded female sub; a male sub; and a threaded wing nut that is concentrically disposed about each of the threaded female sub and the male sub to couple the threaded female sub to the male sub; wherein the threaded wing nut comprises:
a body having an axial length defined between first and second end surfaces, the body having an exterior surface extending between the first and second end surfaces;
a passage axially extending through the body from the first end surface to the second end surface, wherein the passage defines an interior surface of the body;
a first internal shoulder formed by the interior surface of the body that defines a portion of the passage;
an internal threaded connection formed by the interior surface that extends from the first end surface and towards the first internal shoulder; and
a plurality of circumferentially-spaced lugs extending radially from the exterior surface of the body; and
wherein the body has a variable wall thickness defined between the interior surface of the body and the exterior surface of the body, with the variable wall thickness at the first internal shoulder being greater than the variable wall thickness at the first end surface; wherein the internal threaded connection has a full-root radius; and wherein a first lug of the plurality of lugs extends along the axial length of the body.

2 . The hammer union of claim 1 ,
wherein the variable wall thickness at the first internal shoulder being greater than the variable wall thickness at the first end surface results in increased rigidity of the body; wherein the internal threaded connection having a full-root radius reduces the amount of stress exerted on the internal threaded connection; and wherein the first lug of the plurality of lugs extending along the axial length of the body increases the durability of the threaded wing nut.

3 . The hammer union of claim 1 , wherein the variable wall thickness at the first internal shoulder is about 0.75 inches and the variable wall thickness at the first end surface is about 0.6 inches.

4 . The hammer union of claim 1 ,
wherein the exterior surface of the body defines an outer circumference and an outer diameter; wherein the first lug of the plurality of lugs defines a width measured along a line that is tangential to the outer circumference of the body; and wherein the ratio of the outer diameter of the body to the width of the first lug is between about 2.5 and about 5.5.

5 . The hammer union of claim 4 ,
wherein the outer diameter of the body is about seven inches; and wherein the width of the first lug is about two inches such that the ratio of the outer diameter of the body to the width of the first lug is about 3.5.

6 . The hammer union of claim 1 ,
wherein the threaded wing nut further comprises a second internal shoulder formed by the interior surface of the body; and wherein the second internal shoulder defines another portion of the passage that is axially positioned between the internal threaded connection and the first internal shoulder.

7 . The hammer union of claim 1 , wherein the internal threaded connection of the wing nut is adapted to engage a corresponding external threaded connection of the threaded female sub to couple the threaded female sub to the male sub.

8 . A wing nut for a hammer union, the wing nut comprising:
a body having an axial length defined between first and second end surfaces, the body having an exterior surface extending between the first and second end surfaces; a passage axially extending through the body from the first end surface to the second end surface, wherein the passage defines an interior surface of the body; a first internal shoulder formed by the interior surface of the body and defining a portion of the passage; an internal threaded connection formed by the interior surface of the body and defining another portion of the passage, wherein the internal threaded connection extends from the first end surface and towards the first internal shoulder; and a plurality of circumferentially-spaced lugs extending radially from the exterior surface of the body; wherein:
the body has a variable wall thickness defined between the interior surface of the body and the exterior surface of the body, with the variable wall thickness at the first internal shoulder being greater than the variable wall thickness at the first end surface;
the internal threaded connection has a full-root radius; or
a first lug of the plurality of lugs extends along the axial length of the body.

9 . The wing nut of claim 8 , wherein the internal threaded connection has the full-root radius.

10 . The wing nut of claim 9 , wherein the internal threaded connection having the full-root radius reduces the amount of stress exerted on the internal threaded connection.

11 . The wing nut of claim 8 , wherein the first lug of the plurality of lugs extends along the axial length of the body.

12 . The wing nut of claim 11 , wherein the first lug extending along the axial length of the body increases the durability of the wing nut.

13 . The wing nut of claim 8 , wherein the body has the variable wall thickness defined between the interior surface of the body and the exterior surface of the body, with the variable wall thickness at the first internal shoulder being greater than the variable wall thickness at the first end surface.

14 . The wing nut of claim 13 , wherein the variable wall thickness at the first internal shoulder being greater than the variable wall thickness at the first end surface results in increased rigidity of the body.

15 . The wing nut of claim 8 ,
wherein the exterior surface of the body defines an outer circumference and an outer diameter; wherein the first lug of the plurality of lugs extends along the axial length of the body; wherein the first lug of the plurality of lugs defines a width measured along a line that is tangential to the outer circumference of the body; and wherein the ratio of the outer diameter of the body to the width of the first lug is between about 2.5 and about 5.5.

16 . The wing nut of claim 15 ,
wherein the outer diameter of the body is about seven inches; and wherein the width of the first lug is about two inches such that the ratio of the outer diameter of the body to the width of the first lug is about 3.5.

17 . The wing nut of claim 8 ,
wherein the internal threaded connection of the wing nut is adapted to engage a corresponding external threaded connection of a female sub to couple the female sub to a male sub and at least partially form the hammer union.

18 . The wing nut of claim 8 , wherein the variable wall thickness at the first internal shoulder is about 0.75 inches and the variable wall thickness at the first end surface is about 0.6 inches.

19 . The wing nut of claim 11 , wherein the internal threaded connection has the full-root radius.

20 . The wing nut of claim 19 , wherein the body has the variable wall thickness defined between the interior surface of the body and the exterior surface of the body, with the variable wall thickness at the first internal shoulder being greater than the variable wall thickness at the first end surface.

21 . The wing nut of claim 9 , wherein the body has the variable wall thickness defined between the interior surface of the body and the exterior surface of the body, with the variable wall thickne

Assignees

• Spm Flow Control Inc

Inventors

• Witkowski Brian
• Sam Bunhap

Classifications

• F16L19/025 Primary

  the pipe ends having integral collars or flanges · CPC title

• F16B33/02

  Shape of thread; Special thread-forms ({F16B25/00 takes precedence; used to remove paint or dirt layers F16B35/007, F16B37/002}; used as screw-locking device F16B39/30) · CPC title

• F16B37/16

  Wing-nuts (F16B37/14 takes precedence) · CPC title

• F16L19/0218 Primary

  comprising only sealing rings · CPC title

• F16L19/065

  the wedging action being effected by means of a ring · CPC title