Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1982-08-25
1985-02-19
Holko, Thomas J.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
411341, F16B 1304
Patent
active
045002398
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a toggle bolt which can be set interlockingly in a bore provided with a circumferential radial undercut, having a toggle body substantially corresponding to the diameter of the bore, which can be inserted into the bore, in the form of an end piece of relatively short length disposed on the bore-internal end of an elongated mounting bolt provided on its outer end with a screw head or with a nut threaded on it, the bottom piece supporting the bore-internal ends of locking elements closed together to form a thick-walled cylindrical barrel around the mounting bolt, whose extremities pointing toward the bore mouth can be turned from a position within the diameter of the bore to a position in which they project at least partially beyond the diameter of the toggle body and hook lockingly against the undercut surface of the bore, and having a component engaging between the bore mouth-facing ends of the locking elements and tapering conically toward the bore interior, which [component] forces the rearward ends of the locking elements positively outwardly upon the movement of the end piece toward the bore mouth, at least one helical spring which can be placed under bias by axial compression being disposed between the conically tapering component disposed for longitudinal displacement on the mounting bolt and the screw head or nut, as the case may be, whose bias is fixed by an annular clasping element disposed on the end portion of the locking elements pointing toward the bore mouth and having an annular section projecting on the bore-mouth side beyond the diametric dimension of the corresponding bore.
The clasping element which secures the locking elements against spreading prematurely as a result of the bias of the spring is, in the known toggle bolt thus configured (DE-OS No. 2,906,914), a thin metal ring from which a plurality of radially outwardly turned tabs project which, upon the insertion of the toggle into a corresponding bore, collide with the surface of the workpiece to be mounted or of the wall provided with the bore and, as insertion continues, draw the clasping element away from the locking element, the clasping element thus being released automatically, without special manipulations.
The invention has the object of improving the operation of this clasping element while making it less expensive to manufacture, and especially of assuring that it will slip off from the locking elements only when the toggle bolt is set, but not during transport or other halding of the toggle, when the conically tapering component would then spread the locking elements apart outside of the corresponding bore.
This object is achieved in accordance with the invention in that the clasping element is in the form of a plastic sleeve having an integral, planar circumferential annular flange projecting radially from its bore-mouth side outwardly beyond the diametric dimension of the corresponding bore, and having at least one, preferably several, integral, thin, flexible tabs projecting at uniform angular intervals radially inwardly from the bore-mouth side of the sleeve and resting on the conical section of the tapering component. The plastic sleeve thus configured can be manufactured very economically by the injection molding method, and the radially inwardly projecting tabs resting against the conical section of the tapering component forming a means of securing against unintentionally pushing the sleeve downwardly from the locking elements, or indeed in either direction, i.e., whether toward the mouth of the bore or toward the interior thereof. Not until the toggle bolt is being set and its front end has been inserted into the bore to such an extent that the radially outwardly projecting annular flange of the plastic sleeve engages the surface of the workpiece to be fastened or of the wall provided with the bore, and the toggle is then pushed with greater force further into the bore, is the sleeve pushed off of the locking elements and the tapering, conical component of the spring bends the radially i
REFERENCES:
patent: 1304065 (1919-05-01), Kennedy
patent: 3296919 (1967-01-01), Williams
patent: 4245545 (1981-01-01), Freeman
patent: 4290338 (1981-09-01), Gruber
LandOfFree
Interlocking toggle bolt does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interlocking toggle bolt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interlocking toggle bolt will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-610703