Buckles – buttons – clasps – etc. – Bale and package ties – hose clamps – With tighteners
Patent
1996-10-02
1998-02-24
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Bale and package ties, hose clamps
With tighteners
24280, 24285, F16L 3300
Patent
active
057200866
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a clamping collar for hermetically (i.e. perimetrically sealingly) connecting axially aligned ends of two tubular parts, in particular those designed to form the exhaust conduit of a vehicle exhaust pipe.
It will find an application in all those sectors of economic activity in which it is necessary to have recourse to a clamping collar in order to ensure the hermetic connection of two parts, in particular of circular cross-section and, more particularly, in the field of motor vehicle construction for the manufacture of exhaust pipes.
Such clamping collars further have the function of exerting tangential stress upon the member about which they are placed in order, in particular, to cause a reduction of their radial dimensions and thus to ensure clamping.
There are currently various types of clamping collar in existence, the shape and constitution of which are, furthermore, adapted to their intended use.
In particular, in certain specific applications, such clamping collars further have to possess properties enabling them to ensure the hermetic connection of the parts. Such a characteristic is required, in particular, in the case of their application to the hermetic connection of conduits constituting the exhaust system of a vehicle.
It should also be noted that, in such applications and, in particular, in the exhaust systems of engines and most especially those of vehicles, such collars also have to withstand high temperatures, as well as considerable temperature variations. Furthermore, they also have to withstand substantial mechanical forces and stresses resulting, in particular, from the vibrations and dynamic stresses arising from the operation of the engine.
To enable these different forces and stresses to be withstood, the connection between the two successive portions of an exhaust system can be provided by a clamping collar having a substantially V-shaped cross-section and into which the ends to the two portions of the exhaust system that are in contact are intended to fit, these two ends further having substantially conical matching bearing surfaces projecting perpendicularly to their cylindrical outer surfaces.
Such clamping collars are constituted, for example, by two rigid semi-cylindrical parts each terminating at their end in a fixing ring and being held together by means of screws passing through the facing lugs of the collar.
There is thus obtained a close, strong contact between the collar and the two portions of the exhaust system. However, in practice, such collars do not give satisfaction since they are of complex design, and they are not always easy to put into place or remove, which, it will be appreciated, leads to added costs when assembling or disassembling a vehicle exhaust system.
Furthermore, such collars necessitate the fitting of at least two bolts so as to assemble and clamp the two rings of the collar. The clamping forces are thus poorly exploited and, especially, poorly distributed, since they tend to draw together the two semi-circular members constituting the relatively rigid collar without exerting uniform traction distributed over its periphery, which is detrimental to the sealing characteristics of the clamping of the two parts of the exhaust system.
To remedy these drawbacks there has been devised a collar that is constituted by an open ring, the cross-section of which is in the shape of an inverted V and the ends of which comprise bearing lugs, for clamping means, which lugs extend radially into the vicinity of the internal periphery of the ring.
For this purpose there has been devised a ring that is deformable for tightly pressing against one another the conically shaped matching bearing surfaces of the tubes, and which has means for clamping and holding the ring in closed position, constituted in a manner known per se by a nut and screw assembly. On its periphery, the head of the screw has a V-shaped notch corresponding to the cross-section of the ring so as to come to bear on a first lug at least in the
REFERENCES:
patent: 649916 (1900-05-01), Dietrich
patent: 2663582 (1953-12-01), Sebok
patent: 2828525 (1958-04-01), Gail
patent: 2863203 (1958-12-01), Dalpiaz
patent: 2897569 (1959-08-01), Kastner
patent: 3334388 (1967-08-01), Turbyfill
patent: 4834431 (1989-05-01), Calmettes et al.
patent: 5010626 (1991-04-01), Dominguez
Bechler Philippe
Eliasson Roger
Ryhman Morgan
ABA of Sweden AB
Sakran Victor N.
LandOfFree
Clamping collar does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Clamping collar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clamping collar will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1868307