Source: http://www.google.com/patents/US6497435?ie=ISO-8859-1
Timestamp: 2014-03-14 00:49:07
Document Index: 134918769

Matched Legal Cases: ['art 42', 'art 42', 'art 42', 'art 44', 'art 42', 'art 44', 'art 42', 'arts 42', 'arts 42', 'arts 42']

Patent US6497435 - Arrangement for connecting two tubular elements - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA coupling assembly for connecting two tubular elements, in particular ends of two tubes of an air-conditioning system, includes two inter-engaging locking parts which, for the purpose of achieving a locked position, can be rotated with respect to one another and can be displaced with respect to one...http://www.google.com/patents/US6497435?utm_source=gb-gplus-sharePatent US6497435 - Arrangement for connecting two tubular elementsAdvanced Patent SearchPublication numberUS6497435 B1Publication typeGrantApplication numberUS 09/469,997Publication dateDec 24, 2002Filing dateDec 22, 1999Priority dateDec 23, 1998Fee statusLapsedAlso published asDE19860075A1, EP1013981A2, EP1013981A3, EP1013981B1Publication number09469997, 469997, US 6497435 B1, US 6497435B1, US-B1-6497435, US6497435 B1, US6497435B1InventorsThomas Luft, Michael HuckOriginal AssigneeAeroquip-Vickers International GmbhExport CitationBiBTeX, EndNote, RefManPatent Citations (27), Non-Patent Citations (1), Referenced by (11), Classifications (7), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetArrangement for connecting two tubular elementsUS 6497435 B1Abstract A coupling assembly for connecting two tubular elements, in particular ends of two tubes of an air-conditioning system, includes two inter-engaging locking parts which, for the purpose of achieving a locked position, can be rotated with respect to one another and can be displaced with respect to one another in the axial direction. The locking parts utilize a bayonet locking feature and include at least two sub-elements, the sub-elements being fixed in the radial direction by two inter-engaging sleeves.
PRIOR ART It is know, for example for the purpose of producing a coolant circuit, to connect individual tubes to one another at their ends. For this purpose, use is made of bayonet locks designed, for example, as quick-action couplings. The bayonet locks usually have two mutually associated, inter-engaging locking parts which, for the purpose of achieving a locked position, can be rotated with respect to one another and can be displaced with respect to one another in the axial direction.
DESCRIPTION OF THE DRAWINGS The invention is explained in more detail hereinbelow, by way of an exemplary embodiment, with reference to the drawings, in which:
DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 illustrates an exploded illustration of a coupling assembly 10 for connecting two tubular elements, namely, a first tube 12 and second tube 14, each having end portions 16 and 18, respectively, to be joined together. The tube end portion 16 has a first sealing surface 22, which is formed by a flange 24. In this case, the sealing surface 22 forms a radial annular surface.
The locking part 42 has an axial through-opening 58, of which the internal diameter corresponds to the external diameter of the tube 12, the term �corresponds�, in the context of the present invention, being understood as meaning the same diameters. Furthermore, the locking part 42, on the outside of the region which contains the axial through-opening 58, has a tapered section 57 with radial depression 59. The depression 59 can receive a securing ring 102, which fixes the axial position of the sleeve 92. For this purpose, the sleeve 92 has at one end 93, on an inner surface 94, a protrusion 100 which is preferably shaped radially. The protrusion 100 has an internal diameter which is smaller than the external diameter of the securing ring 102 and which corresponds to the external diameter of the tapered section 57. This fixes the axial position of the sleeve 92 relative to the first locking part 42.
In accordance with FIG. 4b, the locking part 44 is introduced into the sleeve 60 of the locking part 42 by way of its plug-in section 77. At the same time, the end 16 of the tube 12 passes into the widened section 30 of the tube 14 and the sleeve 104 passes into the sleeve 92. The locking part 44 is pushed into the locking part 42 in a defined position, in which the protrusion 64 can engage in the depression 78 and be pushed through in the axial direction there. Once the protrusion 64 has moved axially along the lateral surface 80 of the depression until it is level with the annular surface 82, the locking parts 42 and 44 are rotated with respect to one another. In this case, the protrusion 64 is guided along the annular surface 82, with the result that�as has already been explained�axial movement additionally takes place at the section 86. During rotation of the locking parts 42, 44 with respect to one another, the rounded section 98 of the pin 96 slides on the ramp 72 and is thus pushed radially outwards through the bore 95. The section 88 of the annular surface 82, in turn, runs parallel to the rotary movement (i.e. parallel to a plane perpendicular to the axis of the tubes 12 and 14), with the result that there is no more axial movement. The protrusion 64 is guided as far as the protrusion 90 and abuts against the latter without stressing. Rotation of the locking parts 42 and 44 with respect to one another in the opposite direction, and thus unlocking of the coupling assembly 10, can take place if the protrusion 64 is guided into the region of the conically running section 86 again. Since the sealing element 34 usually consists of an elastic material which is compressed/pressed together in the axial direction during locking, it is thus possible to provide a restoring force for the unlocking operation. The operation of unlocking the assembly is thus assisted in the region of the conically running section 86, with the result that there is no need for any additional tools.
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