Anti-rotation pipe joint

• US 5,868,443 A
• Filed: 10/06/1997
• Issued: 02/09/1999
• Est. Priority Date: 11/30/1995
• Status: Expired due to Fees

• Current Assignee: CertainTeed Corp. (Compagnie De Saint-Gobain)
• Original Assignee: CertainTeed Corp. (Compagnie De Saint-Gobain)
• Inventors: Shumaker, Lawrence, Ungerman, John P., Ungerman, James M.
• Primary Examiner(s): Nicholson, Eric K.
• Application Number:
  US08/944,113
• Time in Patent Office: 491 Days
• Field of Search: 285/369, 285/305, 285/330, 285/325, 285/913, 285/417, 464/153, 464/154, 464/157, 464/183
• US Class Current: 285/369
• CPC Class Codes: F16L 37/148 the securing element being flexible F16L37/144 takes precedence
• CPC Class Codes: Y10S 285/913 Interdigitating

Abstract

Mechanical pipe connections are provided by this invention which include an interlocking system between two pipes to be connected within a tubular fitting member. The interlocking system includes male and female portions which mechanically mesh together to form binding contact between the pipes to reduce the individual rotation of the pipes relative to one another.

Claims

1. A reversible mechanical pipe connection comprising:

first and second pipes having a first and second ends respectively;

said first and second ends comprising a first pair of annular recesses;

said connection further including a tubular fitting member having a second pair of annular recesses and a pair of open ends for slidably and rotatably receiving said first and second ends of said first and second pipes whereby said first and second pair of annular recesses become aligned to form a pair of annular cavities, said connection further including a pair of flexible splines disposed through a sidewall of said tubular fitting member to inhibit a longitudinal separation of said first and second pipes, said first end comprising a first pair of axially extended and recessed portions and said second end of said second pipe comprising a second pair of axially extended and recessed portions;

said first and second ends interlocked within said tubular fitting member for reducing rotation of said first and second pipes when one of said first and second pipes experiences rotational torque.

2. The mechanical pipe connection of claim 1 wherein said extended portion comprises a remaining portion of said first end of said first pipe which has not been recessed.

3. The mechanical pipe connection of claim 1 wherein said first and second ends comprise portions wherein the circumference of said pipe has been removed.

4. The mechanical pipe connection of claim 1 wherein said extend and recessed portions comprise complementary surfaces for interlocking with one another to prevent rotation of said first and second pipes so as to reduce misalignment.

5. The mechanical pipe connection of claim 1 wherein said first and second ends of said first and second pipes comprise first and second recessed portions and first and second remaining portions, whereby said first recessed portion approximately matches the shape of said second remaining portion and said first remaining portion approximately matches the shape of said second recessed portion.

6. A reversible mechanical pipe connection comprising:

at least two substantially linearly aligned pipes having end portions thereon,

a tubular fitting member having a pair of open ends for slidably and rotatable receiving said pipe end portions, said tubular fitting member including annular locking means for locking the tubular fitting member to said pipe end portions, said annular locking means comprising a first pair of annular grooves disposed on an inside surface of said tubular fitting member, a second pair of annular grooves disposed on said end portions of said pipes, and a pair of flexible splines disposed through a sidewall of said tubular fitting member and into said first and second pair of annular grooves to inhibit longitudinal separation of said pipes;

a first of said pipe end portions comprising a first pair of axially extended and recessed portions; and

a second of said pipe end portions comprising a second pair of axially extended and recessed portions, said first and second end portions forming a separable locking arrangement within said tubular fitting member for minimizing the degree to which said first and second pipe end portions can rotate when one of said first and second pipes experiences rotational torque.

7. The mechanical pipe connection of claim 6 wherein said extended and recessed portions of said first and second pipe end portions approximately match one another in size and shape.

8. The mechanical pipe connection of claim 6 wherein said recessed portions of said first and second pipe and portions comprise curved recesses of greater than about 90 degrees.

9. The mechanical pipe connection of claim 8 wherein said curved recesses comprise about 180 degrees of the circumference of said first and second pipe end portions.

10. A method of making a reversible fluid pipe connection between at least a first and second pipe, comprising:

(a) providing said first pipe having a first end portion including a first annular recess and first pair of integrally formed axially extended and recessed portions;

(b) providing said second pipe having a second end portion including a second annular recess and a second pair of integrally formed axially extended and recessed portions;

(c) providing a tubular fitting member having a pair of open ends for slidably and rotatable receiving said first and second end portions therein and a pair of annular recesses disposed on an internal surface, said tubular fitting member comprising annular locking means comprising a pair of flexible splines for locking said pair of annular recesses of said tubular fitting member to said first and second annular recesses of said first and second pipes;

(d) inserting said first and second end portions into the open ends of said tubular fitting member so that they meet and nest together along said first and second pairs of axially extended and recessed portions, so as to minimize the degree to which said first and second end portions of said first and second pipes can rotate when one of said first and second pipes experiences rotational torque; and

(e) inserting said flexible splines into said annular recesses to inhibit longitudinal separation of said pipes.

11. The method of claim 10 wherein said providing steps (a) and (b) comprise forming a recess in said first and second end portions to produce said extended portions and said recessed portions.

12. A reversible mechanical pipe connection comprising:

first and second plastic pipes having first and second ends respectively, said first and second ends comprising integrally formed axially extended and recessed portions and a first pair of annular recesses; and

a tubular fitting member having a second pair of annular recesses and a pair of open ends for slidably and rotatably receiving said first and second ends of said first and second plastic pipes whereby said first and second pair of annular recesses become aligned to form a pair of annular cavities, said connection further including a pair of flexible splines disposed through a sidewall of said tubular fitting member and into said pair of annular cavities to inhibit longitudinal separation of said first and second pipes, said first and second ends being interlocked along said extended and recessed portions within said tubular fitting member for reducing rotation of said first and second pipes when said mechanical pipe connection is made and one of said first and second pipes experiences rotational torque, said pipe connection being completed when said first and second plastic pipes are in direct contact with one another within said tubular fitting member.

13. The reversible mechanical pipe connection of claim 12 wherein said integrally formed extended and recessed portions on said first and second pipes are sized to nest within one another in a male-female relationship so as to minimize rotation of said first and second pipes relative to one another.