Flexible pipe connector

• US 5,335,945 A
• Filed: 07/14/1992
• Issued: 08/09/1994
• Est. Priority Date: 07/14/1992
• Status: Expired due to Term

• Current Assignee: Tuf-Tite Incorporated
• Original Assignee: Tuf-Tite Incorporated
• Inventors: Meyers, Theodore W.
• Primary Examiner(s): Bradley, P. Austin
• Assistant Examiner(s): Knapp, Jeffrey T.
• Application Number:
  US07/913,143
• Time in Patent Office: 756 Days
• Field of Search: 285/236, 285/237, 285/383, 285/423, 285/903
• US Class Current: 285/236
• CPC Class Codes: E03F 5/021 Connection of sewer pipes to manhole shaft
• CPC Class Codes: F16L 25/0045 of the quick-acting type
• CPC Class Codes: F16L 37/084 combined with automatic locking
• CPC Class Codes: Y10S 285/903 Corrugated

Abstract

A flexible pipe connector is disclosed having two female ends, each for receiving a length of corrugated pipe and creating a gravity flow water-tight seal between the two lengths of corrugated pipe. The flexible pipe connector is made of flexible, stretchable plastic material, with each female end having a receiving length with a mouth at a first end thereof and a stopping flange at a second end thereof. Each female receiving end is constructed to stretch radially outward along a substantial length of the corrugated pipe which is inserted into the mouth and receiving length, such that the receiving length exerts radially inward compressive forces against the outer diameter of the corrugated pipe effectuating a gravity flow water-tight seal. The invention also includes a male-to-female form of connector having a female end and a male end, which coupler is adapted to be used to connect a corrugated pipe to a flexible seal member of a drop box and is able to receive a speed leveling device. Additionally, a female-to-female connector for use in sealably connecting smooth-walled, hard plastic drain pipes. Clamp means are disclosed to assist the flexible pipe connector in creating a pressure water-tight seal.

Claims

1. A flexible pipe connector for connecting lengths of corrugated pipe, said connector comprising:

a flexible and stretchable tube member having a cylindrical wall with a thickness of approximately 0.02 to 0.04 inches and inner and outer surfaces, said member defining at least one female end having a receiving length with a mouth at a first end and a stop means formed at a second end, said mouth being adapted to slideably receive an end of said corrugated pipe until said pipe end contacts said stop means;

wherein said receiving length is capable of stretching sufficiently radially outward and exerting sufficient radially inward compressive forces to create a water-tight seal when a corrugated pipe end is inserted into said receiving length.

2. The invention of claim 1, wherein said tubing is comprises of a linear low density polyethylene.

3. The invention of claim 1, and wherein said cylindrical wall has a thickness of approximately 0.030 inches.

4. The invention of claim 1, wherein said stop means comprises an annular flange disposed on said inner surface of said cylindrical wall, said annular flange being substantially perpendicular to a longitudinal axis of said cylindrical wall and being adapted to prevent said pipe end from further insertion into said mouth and receiving length of said female end of said connector.

5. The invention of claim 1, wherein a section of the said inner surface adjacent said mouth is chamfered to facilitate insertion of said pipe end into said mouth

6. The invention of claim 1, wherein said female end is adapted to stretch so as to receive both dual-wall co-extruded corrugated pipe ends and 1500 lb. crush corrugated pipe ends.

7. The invention of claim 1, wherein a clamping means is positioned about an outer diameter of said cylindrical wall to be releasably tightened once said corrugated pipe end is inserted said distance into said receiving length, said clamping means operable to increase the radially inward compressive forces against said corrugated pipe end so as to effectuate a pressure flow water-tight seal between said corrugated pipe and said connector.

10. The invention of claim 1, wherein said tube member includes two opposed and coupled said female ends for receiving two separate abutting lengths of said corrugated pipe therein.

11. The invention of claim 10, wherein said male and female connector ends are connected by an annular wall member, said annular wall member forming said stop means for said female end.

12. The invention of claim 11, wherein said annular wall member is substantially perpendicular to a longitudinal axis of said cylindrical wall member.

13. The invention of claim 1, wherein said tube member further defines a male connector end coupled to said female connector end.

14. The invention of claim 13, wherein said male connector end has an inner surface, said inner surface having an inner ledge for receiving a flexible wiper element of a leveling device.

8. The invention of claim 8, wherein a plurality of annular ribs are disposed on said outer surface of said cylindrical wall to assist in positionally locating said clamping means on said connector.

9. The invention of claim 8, wherein said clamping means comprises an adjustable radiator clamp made of stainless steel.

15. A female-to-female flexible pipe connector for connecting two lengths of corrugated pipe, said female-to-female pipe connector comprising:

a flexible, stretchable tube member having a cylindrical wall with a thickness of approximately 0.02 to 0.04 inches and inner and outer surfaces, said tube member having at each end thereof a female end having a receiving length with a mouth at a first end and a stop means at a second end, each said mouth being adapted to slideably receive an end of said corrugated pipe so that said pipe end can be inserted a sufficient sealing distance into the receiving length until said pipe end contacts said stop means, wherein said receiving length of each said female end is capable of stretching sufficiently radially outward and exerting sufficient radially inward compressive forces to create a water-tight seal when a corrugated pipe end is inserted into said receiving length.

16. The invention of claim 15, wherein said stop means comprises an annular flange disposed on said inner surface of said cylindrical tube wall, said annular flange being substantially perpendicular to a longitudinal axis of said tube member and being adapted to prevent said pipe ends of each respective length of corrugated pipe from further insertion into said mouth and receiving length of each said female end.

17. A male-to-female flexible pipe connector comprising:

a flexible, stretchable tube member having a cylindrical wall with a thickness of approximately 0.02 to 0.04 inches and inner and outer surfaces, said tube member defining at opposite ends thereof a female connector end and a male connector end, said female end having a receiving length with a mouth at a first end and a stop means at a second end, said mouth being adapted to slideably receive an end of a corrugated pipe so that said pipe end can be inserted a sufficient sealing distance into said receiving length until said pipe end contacts said stop means;

wherein said receiving length is capable of stretching sufficiently radially outward and exerting sufficient radially inward compressive forces to create a water-tight seal when a corrugated pipe end is inserted into said receiving length.

18. The invention of claim 17, wherein said inner surface of said male end includes an inner ledge member formed thereon for receiving a flexible wiper element of a leveling device.

19. The invention of claim 17, wherein said stop means comprises an annular wall which connects said male and female ends.

20. The invention of claim 19, wherein said annular wall is substantially perpendicular to a longitudinal axis of said tube member and connects said cylindrical wall of said female connector end to said cylindrical wall of said male connector end.

21. A flexible pipe connector for connecting lengths of smooth-walled pipe, said connector comprising:

a flexible stretchable tube member having a cylindrical wall with inner and outer surfaces, said member defining at least one female end having a receiving length with a mouth at a first end and a stop means formed at a second end, said mouth being adapted to slideably receive an end of said smooth-walled pipe until said pipe end contracts said stop means;

wherein said receiving length is capable of stretching sufficiently radially outward and exerting sufficient radially inward compressive forces to create a water-tight seal when a smooth-walled pipe end is inserted into said receiving length.

22. The invention of claim 21, wherein a clamping means is positioned about an outer diameter of said cylindrical wall to be releasably tightened once said smooth-walled pipe end is inserted said distance into said receiving length, said clamping means operable to increase the radially inward compressive forces against said smooth-walled corrugated pipe end so as to effectuate a pressure flow water-tight seal between said smooth-walled pipe and said connector.

23. The invention of claim 22, wherein a plurality of annular ribs are disposed on said outer surface of said cylindrical wall to assist in postionally locating said clamping means on said connector.

24. The invention of claim 22, wherein said clamping means comprises an adjustable radiator clamp made of stainless steel.

25. A combination pipe joint comprising:

a first corrugated pipe having a plurality of crests and valleys and having an end;

a second corrugated pipe having a plurality of crests and valleys and an end; and

a flexible, stretchable connecting tube member having a cylindrical wall with a thickness of approximately 0.02 to 0.04 inches and inner and outer surfaces, said tube member including a pair of female connector ends each slideably receiving one of said ends of said first and second corrugated pipes, each of said female connector ends including a receiving length stretched radially outward along a length of said corrugated pipes that are inserted in each of said female connector ends, wherein said receiving lengths exert radially inward compressive forces against said corrugated pipe ends and tightly grip said crests of said corrugated pipes to create a water-tight seal between said first and second corrugated pipes and said tube member.

26. The pipe joint of claim 25 in which said tube member is comprised of a linear low density polyethalyne.

27. The pipe joint of claim 25 in which said cylindrical wall has a thickness of approximately 0.03 inches.