Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Prefabricated assembly comprising strip or sheet member...
Patent
1995-05-03
1997-05-13
Saether, Flemming
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Prefabricated assembly comprising strip or sheet member...
F16B 3704
Patent
active
056285973
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a spring-biassed nut arrangement in which a nut is fitted with a spring and which is intended for movement along and within a slotted hollow profiled rail.
BACKGROUND OF THE INVENTION
A spring fitted to a nut functions to press the nut against an inner surface of the two mutually opposing rail flanges that define a slot in the rail, so that as a result of contact between the nut and the flanges, the nut will remain in a position to which it is set along the rail. A screw can be inserted through the slot and screwed into a nut exposed in the slot.
In the simplest case, the spring-biassed nut is fitted by inserting the nut from one end of the rail. It is desirable, however, to be able to fit the nut generally radially into the rail through the slot at any chosen position therealong. The nut shall be held against rotation in the rail and in order to be on the safe side, it is necessary to avoid nut constructions which include movable parts by means of which the nut is fitted to the rail.
DESCRIPTION OF THE BACKGROUND ART
DE-C-2,635,439 and SE-B-427,211 describe spring-biassed nuts of the desired kind which lack mutually movable parts for insertion of the nut in the rail and which prevent the nut from rotating when fitted.
The rails concerned can be combined to form an apparatus support stand or frame structure, apparatus cabinet, cable holder or the like, and because the nuts can be displaced along the rails a great deal of freedom is provided with regard to positioning of the screws by means of which the apparatus, the cabinet or the like is secured to the rails of said structure.
The type of spring-biassed nut arrangement disclosed in DE-C-2,635,439 and SE-B-427,211, however, is unsatisfactory in operation, particularly with regard to its fitting to the rail. For instance, the task of fitting the nut manually to the rail is difficult to achieve, since it is first necessary to heavily compress the spring of the known nut and then to insert the nut, with the spring compressed, in through the slot in the rail while holding the nut in a position which deviates from the fitted position of the nut by 90.degree.. This nut arrangement requires primarily a rail having a depth which is greater than the length of the nut in its insertion direction, and the spring is relieved of its compressive load immediately it has passed through the slot in the rail, therewith allowing the spring to expand. Since it is necessary to turn the nut through an angle of 90.degree. after having inserted the nut through the slot, the process of fitting the nut can become extremely difficult at times. For instance, there is the risk that the nut will be unintentionally turned through 90.degree. in the "wrong" direction, so that the nut faces towards the bottom wall of the rail while the spring faces the slot. Naturally, there is also the risk of the nut spring supporting against the bottom-wall region of the slot in a decentred position. A further drawback with this known type of spring-biassed nut arrangement is that it is very difficult to remove the nut from the rail radially through the slot.
Because the spring-biassed nut requires a large amount of free space within the hollow rail, the rail is relatively large in relation to the nut and is given a depth which is at least equal to the internal width of the rail. This results in mechanical strength problems and leads to a relatively high consumption of material in the manufacture of the rail, and also creates geometrical problems with regard to extruded profiled elements of generally rectangular cross-section, in which each element side defines two mutually opposing flanges and an intermediate slot in a hollow profiled rail for spring-biassed nuts of the aforedescribed kind.
Accordingly, one object of the present invention is to provide a spring-biassed nut which can be easily fitted manually into an associated slotted rail and which enables the relative depth of the rail to be limited.
Further objects of the invention are stated directly or indire
REFERENCES:
patent: 2767609 (1956-10-01), Cousino
patent: 3005292 (1961-10-01), Reiland
patent: 4758124 (1988-07-01), Ingeberg
patent: 4784552 (1988-11-01), Rebentisch
patent: 4950099 (1990-08-01), Roellin
patent: 5116161 (1992-05-01), Faisst
Chudoba Josef
Kaufeldt Sven-Erik
Chudoba Josef
Saether Flemming
LandOfFree
Spring urged fastener for location in an open rail section does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spring urged fastener for location in an open rail section, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spring urged fastener for location in an open rail section will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1380618