Buckles – buttons – clasps – etc. – Bale and package ties – hose clamps – Metal bands
Patent
1985-08-02
1986-04-22
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Bale and package ties, hose clamps
Metal bands
24 20CW, 24 23R, 24 23W, 285178, 285243, 403351, 403DIG7, B65D 6302
Patent
active
045832684
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an open tube clamp operative by its inner chucking power over a relatively wide-ranged pressing surface, which is being moved into acting position by means of a tool overcoming the chucking power, and where an almost uniform pressing against the total pressing surface is provided by a cross section increasing in the direction from the open ends to the dead center of the clamping.
Generally one uses tube clamps for the staunch joining of a pipe socket with a flexible tube. In order to be able to quickly mount and also detach such a tube clamp, it is expedient to use an open construction type operating with inner elastic power. For mounting such a structure on its place of operation, one needs a tool that elastically bends apart this clamp.
Easy to manufacture are tube clamps being composed of an open wire spring ring configured like a spiral having somewhat more than one thread. Thereby the open wire ends are squared off in such a manner that a tool surmounting the inner clamping power can be easily applied thereto.
These fixing clamps being sufficient for modest demands and which can be regarded as being generally known, however, have the decisive disadvantage that due to their cross section unvarying all over the thread, when being positioned at their place of action and also during serving their purpose of working with inner clamping power, within the area of the clamping-dead center, they will experience a greater stress and thus also fatigue than at their open ends. In this manner, however, the pressure to be excercised by the inner spring power for pressing-on the tube cannot be kept constant to the desired degree all over the full range of clasping; this pressure will automatically decrease from the clamping dead center to the open ends.
In order to overcome this handicap, one has already designed clamps bent from a plate and provided this plate with openings, so that on the one hand there will result a reduced cross section of the molded and hardened sheet metal ring starting from the clamping dead center to the open ends of the ring, and on the other hand in released condition also a sufficient overlapping of the open ring ends can be obtained.
However, the tube clamps designed in that manner show the disadvantage of being relatively ill-suited for mass production, since it is rather difficult to form them and keep up their configuration even after the hardening in such a manner that in press-on condition they will show the uniform rounding being necessay for the dealing; besides the tube clamps of the aforementioned design being offered on the market show relatively sharp edges on both sides of their press-on surface so that hereby a shearing power is exercised on the tube to be pressed on. If the pipe socket and the tube slipped thereon are components of a machine being exposed to vibrations, then the clamp pressing-on the tube should be shaped and able to keep up its shape in such a manner that the press-on pressure stays as constant as possible all over the tube circumference defining the sealing district for a long time of operation and that likewise no incidental forces can arise leading to destruction.
It is the object of the present invention to develop a tube clamp of the kind as mentioned at the outset in such a manner as to provide a clamp easily to be manufactured and meeting high demands, which guarantees that, among others, the necessary press-on pressure, also after a long time of operation, is still available even if used in arrangements showing vibrations, and that a notching or cutting in of a tube, which very often lead to leakages, is impossible.
According to the invention this object is realized essentially by the characteristics listed in patent claim 1. Hereafter a press-on surface enclosing the tube is receiving its uniform press-on quality by the power effect of at least one clamping ring of which the outer dimensions exceed the mere surface material.
According to the characteristics indicated in the subclaims, this clamping ring can be obtained eit
REFERENCES:
patent: 583454 (1897-06-01), Burns
patent: 767893 (1904-08-01), Jewell
patent: 1378508 (1921-05-01), Woodward
patent: 2285850 (1942-06-01), Weeks
patent: 3087221 (1963-04-01), Armstrong
patent: 3334388 (1967-08-01), Turbyfill
patent: 3482857 (1969-12-01), Gohs
patent: 4305179 (1981-12-01), Sakurada
patent: 4312101 (1982-01-01), Oetiker
Horcher Willi
Sakran Victor N.
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