Sockets serving for the connection of two plastic pipes

• US 5,758,906 A
• Filed: 07/07/1995
• Issued: 06/02/1998
• Est. Priority Date: 07/08/1994
• Status: Expired due to Fees

• Current Assignee: Hobas Engineering AG
• Original Assignee: Hobas Engineering AG
• Inventors: Kunze, Peter, Carlstrom, Borge, Mitteregger, Johann
• Primary Examiner(s): Arola, Dave W.
• Application Number:
  US08/499,731
• Time in Patent Office: 1,061 Days
• Field of Search: 385/110, 385/112, 385/423, 385/369, 385/383
• US Class Current: 285/112
• CPC Class Codes: F16L 47/08 with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket

Abstract

The socket has an essentially cylindrical outer layer of glass fiber-reinforced plastic and a sealing sleeve arranged in a recess in the outer layer. This sealing sleeve has, between the two socket ends, a rib serving as a stop for the ends of the two pipes to be connected to one another. Here, the outer layer forms a first and a second hollow cylindrical, dimensionally stable edge section, the first of which is substantially longer than the second. That end of such a socket which is formed by the longer edge section can be pushed relatively easily onto a first pipe and can also be nondetachably bonded thereto by means of an adhesive. The second pipe having the same diameter can then be inserted into the socket end formed by the shorter edge section. Here, the relatively short edge section makes it possible to insert the second pipe into the socket with a tight seal even when the axes of socket and pipe do not coincide but make a small angle with one another.

Claims

1. A pipe connector socket comprising:

an outer layer with first and second cylindrical edge sections, each of said first and second cylindrical edge sections having an internal diameter D₁, a first axial length L₁ of said first cylindrical edge section being larger than a second axial length L₂ of said second cylindrical edge section, said outer layer having an inner surface defining an inner annular recess between said first and second cylindrical edge sections;

a deformable sealing sleeve positioned inside said outer layer and in said annular recess, said sealing sleeve including rib means extending radially inward and for blocking movement of a pipe though said sealing sleeve past said rib means, said rib means dividing said sealing sleeve into a first part adjacent said first cylindrical edge section and a second part adjacent said second cylindrical edge section, said first part being shorter than said second part.

2. A pipe connector socket in accordance with claim 1, wherein:

first and second pipes are insertable into said first and second cylindrical edge sections, the first and second pipes having an external diameter D_r ;

said first axial length L₁ being defined by

space="preserve" listing-type="equation">L.sub.1 =40 (D.sub.1 -D.sub.r).

3. A pipe connector socket in accordance with claim 1, wherein:

first and second pipes are insertable into said first and second cylindrical edge sections, the first and second pipes having an external diameter D_r ;

said first axial length L₁ being defined by

space="preserve" listing-type="equation">L.sub.1 =80 (D.sub.1 -D.sub.r).

4. A pipe connector socket in accordance with claim 1, wherein:

said first axial length L₁ is at least equal to twice said second axial length L₂.

5. A pipe connector socket in accordance with claim 1, wherein:

said sealing sleeve includes a plurality of annular ribs extending radially outward, said plurality of annular ribs project into said outer layer.

6. A pipe connector socket in accordance with claim 1, wherein:

said sealing sleeve includes radial faces, an internal diameter of said radial faces being substantially identical to said internal diameter D₁ of said first and second cylindrical edge sections, and said internal diameter of said radial faces being substantially flush with said internal diameter D₁ of said first and second cylindrical edge sections;

said sealing sleeve including first and second axial ends, each with a sawtooth shaped deformable sealing lip extending radially inward.

7. A pipe connector socket in accordance with claim 6, wherein:

said sealing lip of said second axial end is larger in bulk than said sealing lip of said first axial end.

8. A pipe connector socket in accordance with claim 1, wherein:

said first and second parts of said sealing sleeve have an internal diameter D₂ which is greater than said internal diameter D₁ of said first and second cylindrical edge sections.

9. A pipe connector socket in accordance with claim 1, wherein:

said sealing flange includes axial ends with annular flanges.

10. A pipe connector socket comprising:

an outer layer with first and second cylindrical edge sections, each of said first and second cylindrical edge sections having an internal diameter D₁ substantially equal to each other and substantially constant along an axial length of said each first and second cylindrical edge sections, said axial length of said first cylindrical edge section being larger than said axial length of said second cylindrical edge section, said outer layer defining an inner annular recess between said first and second cylindrical edge sections;

a sealing sleeve positioned inside said outer layer and against said annular recess, said sealing sleeve having sealing means for receiving and sealing pipes inserted from said first and second cylindrical edge sections;

said sealing sleeve including rib means extending radially inward and for blocking movement of a pipe though said sealing sleeve past said rib means, said rib means being axially spaced from said first cylindrical edge section by a first distance which is smaller than a second distance equal to an axial spacing of said rib means from said second cylindrical edge section;

said axial length of said first cylindrical edge section and said first distance is of a magnitude to firmly align said outer layer with a first pipe inserted though said first cylindrical edge section;

said axial length of said second cylindrical edge section and said second distance is of a magnitude for relative angular movement between said outer layer and a second pipe inserted though said second cylindrical edge section;

said sealing sleeve is deformable and said outer layer is harder than said sealing sleeve.

11. A socket as claimed in claim 10, wherein the sealing sleeve has an annular flange at each of its two ends.

12. A pipe connector socket comprising:

an outer layer with first and second cylindrical edge sections, each of said first and second cylindrical edge sections having an internal diameter D₁, a first axial length L₁ of said first cylindrical edge section being larger than a second axial length L₂ of said second cylindrical edge section, said outer layer having an inner surface defining an inner annular recess between said first and second cylindrical edge sections;

a deformable sealing sleeve positioned inside said outer layer and in said annular recess, said sealing sleeve including a plurality of annular ribs extending radially outward between axial ends of said sealing sleeve, said plurality of annular ribs project into said outer layer, radial end faces of the sealing sleeve are flush with an inner surface of the cylindrical edge sections and the two ends of said sealing sleeve are each provided with a sawtooth-like, deformable sealing lip which projects into the interior of the socket.

13. A socket as claimed in claim 12 for connecting two plastic pipes, each having an external diameter D_r, wherein the following is applicable to the length L₁ of the first edge section:

space="preserve" listing-type="equation">L.sub.1 =40 (D.sub.1 -D.sub.r).

14.

14. A socket as claimed in claim 12 for connecting two plastic pipes, each having an external diameter D_r, wherein the following is applicable to the length L₁ of the first edge section:

space="preserve" listing-type="equation">L.sub.1 =80 (D.sub.1 -D.sub.r).

15. A socket as claimed in claim 12, wherein the sealing lip facing the second edge section is larger in bulk than the sealing lip facing the first edge section.

16. A socket as claimed in claim 12, wherein the sealing sleeve has a rib which serves as a stop for the two pipes to be connected to one another and which projects into the interior of the socket, and wherein a cylindrical section which is divided by the rib into a shorter part facing the first edge region and a longer part facing the second edge region is present between the two sealing lips.

17. A socket as claimed in claim 16, wherein an internal diameter D₂ of the two parts is greater than the diameter D₁ of the two cylindrical edge sections.