Pipe coupling

• US 5,137,305 A
• Filed: 03/14/1991
• Issued: 08/11/1992
• Est. Priority Date: 03/20/1990
• Status: Expired due to Fees

• Current Assignee: Straub Federnfabrik AG
• Original Assignee: Straub Federnfabrik AG
• Inventors: Straub, Immanuel
• Primary Examiner(s): Arola, Dave W.
• Application Number:
  US07/669,196
• Time in Patent Office: 516 Days
• Field of Search: 285/373, 285/419, 285/367, 285/112, 285/410, 285/411
• US Class Current: 285/112
• CPC Class Codes: F16L 17/04 with longitudinally split or divided sleeve
• CPC Class Codes: F16L 21/005 made of elastic material, e.g. partly or completely surrounded by clamping devices comprising packing adapted to sealing by fluid pressure F16L17/04, F16L11/20; hose clips F16L33/02

Abstract

A pipe coupling has a cylindrical housing which is split in the longitudinal direction and has inwardly bent end walls and a steel insert sheet of analogous design bridging the gap in the housing. With the aid of a closure with tensioning screws, the housing can be constricted in the manner of a pipe clip, such that a sealing sleeve positioned between the housing and a pipe is compressed in the circumferential direction and brought to bear on the pipes to be sealed off. The closure is offset in the circumferential direction with respect to the housing gap, and the end section of the housing projecting through the region of the tensioning screws is overlapped by a slideway anchored on the other end section. By this means, dimensional stability is increased without increasing the wall thickness, or the constrictability of the housing is guaranteed despite an increased wall thickness.

Claims

1. In a pipe coupling of the type comprising an elastomeric sealing sleeve having a sleeve web and at least two sealing lips which extend toward one another and are supported on the sleeve web, said sealing sleeve being C-shaped in cross section;

a housing comprising a cylindrical jacket which comprises two end sections which define a longitudinal gap therebetween;

a closure coupled to the housing and comprising at least one tensioning screw operative to constrict the jacket;

an insert sheet positioned between the sleeve and the housing to bridge the gap;

said cylindrical jacket and insert sheet defining radially extending end walls;

said sealing lips having a first, larger dimension prior to operation of the closure and a second, smaller dimension in a circumferential direction such that the sealing sleeve can be installed over a pipe prior to operation of the closure and then firmly pressed against the pipe by the jacket and the closure;

the improvement wherein;

the closure is offset with respect to the gap circumferentially; and

the housing comprises a slideway positioned to bridge the gap in the housing, said slideway projecting below the tensioning screw, and said slideway comprising a first portion anchored on one of the end sections of the jacket and a curved guiding surface overlapping the other end section of the jacket.

2. The invention of claim 1 wherein one of the end sections of the jacket defines at least one support tongue, and wherein the other of the end sections of the jacket defines a substantially complementary shape.

3. The invention of claim 1 wherein the housing comprises:

a pair of tensioning straps, each secured to a respective one of the end sections; and

a pair of tensioning bars, each coupled to a respective one of the tensioning straps and to the tensioning screw;

wherein the slideway is defined by a portion of one of the tensioning straps.

4. The invention of claim 3 wherein said portion of said one of the tensioning straps comprises an edge section which overlaps the respective end section of the jacket, wherein the edge section is secured to the respective end section of the jacket at a plurality of circumferentially offset points.

5. The invention of claim 1 further comprising means for anchoring the insert sheet to the end section of the housing that projects under the slideway.