Joints and connections – Branched – Three or more radiating members
Patent
1991-09-23
1993-02-09
Kundrat, Andrew V.
Joints and connections
Branched
Three or more radiating members
403176, F16D 100
Patent
active
051849208
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a connection element for a rod of a three-dimensional framework.
Such a connection element is known from European Patent Application No. EP-A2-0 297 033.
SUMMARY OF THE INVENTION
It is the object of the invention to provide a different type of connection element, but of the same general kind as disclosed in the above-mentioned European Patent Application.
According to the invention, a connection element for a rod of a three-dimensional framework having a junction portion includes: a bolt having a front end portion which can be fastened to the junction portion of the three-dimensional framework; a sleeve insert, the bolt being rotatably fastened to an end of the rod by the sleeve insert; a sleeve having an axial through-bore into which the bolt is partially inserted so as to transmit a rotary movement of the sleeve to the bolt; and a spring for urging the bolt out of the sleeve. The through-bore of the sleeve at the front end portion of the sleeve has a form-locking shape so as to transmit the rotary movement of the sleeve to the bolt. The through-bore at the rear portion of the sleeve has a circumference which is larger than the circumference of the form-locking shape of the through-bore.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 to 5 show diagrammatic sectional views of various embodiments of a connection element according to the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The connection element according to FIG. 1 comprises a sleeve insert 3 consisting of a flange-shaped sleeve head 1 and a tubular part 2, wherein the tubular part 2 is provided with an external thread 4 for fastening it to one end of a rod of a three-dimensional framework. A bolt 5 is guided through a through-bore of the sleeve insert 3, the head 6 of the bolt 5 resting on the end wall of the tubular part 2.
The bolt 5 has a longish, smooth, round part 7 of the length Lg, a guide part 8 of the length Lf, the cross-section of which may be polygonal, and an end part 9 of the length Le, which is provided with an external thread for fastening the connection element to a junction part of the three-dimensional framework. To simplify the drawing, the junction part 10 and the rod are indicated only by broken lines. In particular, the length Lg may be greater than the total of the lengths Lf and Le.
The bolt 5 is guided through the through-bore of a guide sleeve 12, from which the end part 9 projects. At the front part of the guide sleeve 12 this through-bore is made form-locking with the guide part 8 of the threaded bolt 5, so that a rotary movement of the guide sleeve 12 can be transmitted to the bolt 5 with as little play as possible.
The through-bore of the front part of the guide sleeve 12 can, therefore, be the same as the guide part 8 of the bolt 5, (i.e., the cross-section also is polygonal). However, preferably the cross-sections of guide part 8 and the through-bore of the front part of the guide sleeve are hexagonal. In contrast thereto the through-bore has in the rear part of the guide sleeve 12 a preferably round cross-section, in which case there occurs between the round part 7 of the bolt 5 and the preferably cylindrical inside wall of the guide sleeve 12 a relatively large gap, to form an open space in which a coil spring 13 can be accommodated. At the end of the rear part of the guide sleeve 12, preferably in the gap, an annular disk 14 is arranged and connected to it.
In the shell of the guide sleeve 12 an elongated opening 15 is provided, through which a pin can be loosely inserted and connected to the bolt 5, preferably radially in its guide part 8.
The coil spring 13 is arranged in the gap in such a way that on the right (as view from FIG. 1) it rests on the annular disk 14 and on the left, it rests on the pin 16 to press or urge it forward so as to urge the end part 9 of the bolt out of the guide sleeve 12, which it is, for example, pushed by hand into the guide sleeve 12. The transmission of the rotary movement is ensured by the form-locki
REFERENCES:
patent: 3982841 (1976-09-01), Endzweig
patent: 4664550 (1987-05-01), Jachmann
patent: 4677804 (1987-07-01), Holt
patent: 4789264 (1988-12-01), Inchaurbe
patent: 4822199 (1989-04-01), Nehls
patent: 4848952 (1989-07-01), Strassle
patent: 5051019 (1991-09-01), Kohl
Kundrat Andrew V.
Syma Intercontinental AG
LandOfFree
Connection element for a rod does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Connection element for a rod, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Connection element for a rod will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-323044