US 7,320,486 B2 | ||
Pipe clamp | ||
Helmut Geppert, Karlstein (Germany); Heinz Peter Wolf, Bad Soden Salmünster (Germany); Stephan Mann, Bieber (Germany); and Michael Sommer, Büdingen (Germany) | ||
Assigned to NORMA Germany GmbH, Maintal (Germany) | ||
Filed on Aug. 06, 2004, as Appl. No. 10/913,804. | ||
Claims priority of application No. 103 36 351 (DE), filed on Aug. 08, 2003. | ||
Prior Publication US 2005/0029813 A1, Feb. 10, 2005 | ||
Int. Cl. F16L 23/00 (2006.01) |
U.S. Cl. 285—420 [285/261; 285/263; 285/410] | 14 Claims |
1. A pipe clamp in combination with a a first pipe and a second pipe and for connecting the first pipe and the second pipe
that are partially insertable into one another, wherein the first pipe has an insertion end section and the second pipe has
a receiving end section, wherein the insertion end section is divided into a first spherical zone and a second spherical zone
and wherein the receiving end section is shaped to form a third spherical zone, wherein the first spherical zone adjoins a
free end of the insertion end section and has a first outer radius that is identical to a first inner radius of the receiving
end section, wherein the first spherical zone is adapted to be inserted into the receiving end section, wherein the second
spherical zone has a second outer radius that is identical to a third outer radius of the receiving end section; the pipe
clamp comprising:
a clamping strap that, when the pipes are inserted into one another, is configured to be placed circumferentially about the
receiving end section and the second spherical zone, wherein the clamping strap has a first outwardly projecting clamping
jaw and a second outwardly projecting clamping jaw, wherein the first and second clamping jaws each have a hole;
a clamping screw having a screw head and a threaded shaft;
the clamping screw extending through the holes in the first and second clamping jaws;
wherein the head of the clamping screw is supported on a first side of the first clamping jaw which first side is facing away
from the second clamping jaw;
an intermediate part positioned at a first side of the second clamping jaw, which first side is facing away from the first
clamping jaw, and having a threaded bore, wherein the threaded shaft of the clamping screw (10) engages the threaded bore;
wherein the clamping strap is curved about a transverse axis, wherein the transverse axis, when the first and second pipes
are coaxially inserted into one another and the clamping strap is adapted to rest in an untightened state against the receiving
end section and the insertion end section, is positioned in a central plane of the clamping strap that extends perpendicularly
to coaxial center axes of the first and second pipes at a spacing from a center of the first, second, and third spherical
zones;
wherein a second inner radius of the clamping strap in the untightened state is smaller than the second outer radius or the
third outer radius such that a sum of the spacing and of the second inner radius is greater than the second outer radius or
the third outer radius and wherein upon tightening the clamping strap forms a spherical zone in which its center of curvature
coincides with the center and its inner radius is similar to the outer radii of the spherical zones.
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