Conveyors: power-driven – Conveyor section – Conveyor section folds to facilitate transportation or...
Reexamination Certificate
1999-07-09
2001-01-30
Bidwell, James R. (Department: 3651)
Conveyors: power-driven
Conveyor section
Conveyor section folds to facilitate transportation or...
C198S861100
Reexamination Certificate
active
06179116
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a bearing stand for assemblies such as rollers which can be fixed at a preadjusted height. More specifically, the present invention relates to a bearing stand with two pairs of legs, each pair comprising two legs which are connected at a joint and which can be brought from a parallel position into an angled position.
BACKGROUND OF THE INVENTION
Bearing stands are known in widely varying embodiments and serve as support for lengthening the supporting surface of saw tables or workbenches. To this end, the assembly, which can be fastened at an adjustable height, can comprise a roller in order to enable an easy displacement of the supported work piece. It is also known to fold together such a bearing stand so as to save space, as needed, to which end the legs, which are connected at joints, are brought from an angled position into a parallel position. The supports bearing the assembly penetrate the joint of each pair of legs, halving the angle between the allocated legs, given a perpendicular orientation of each support.
With respect to the abovementioned prior art, it is considered a technical problem to improve the handling of a bearing stand of the type in question, particularly with respect to the handling in the course of the setup, or respectively, the collapsing.
SUMMARY OF THE INVENTION
This problem is initially and essentially solved by utilizing the fastening elements that comprise a triangular plate, which is fastened at the end of a support—in a plane-parallel fashion and at a distance from an outward facing support surface of the support, which is fashioned as a rectangular tube—by means of two screws that are respectively situated at a corner borehole of the triangular plate, the terminal screw simultaneously forming the axis of rotation for a carrier of the assembly. The carrier forms a bearing projection which projects into the space between the triangular plate and lateral surfaces of the support and which accepts a threaded stem of a screw handle in an inner thread. It is therefore possible to clamp or jam the screw handle in a slot opening arranged in the third corner of the triangular plate.
As a consequence of this construction, the handling of a bearing stand of the type in question is improved to the extent that the assembly that is borne by the supports is fastened at the bearing stand for the swivelling displacement of same, for example, from a horizontally oriented operative position into a position approximately parallel to the supports, in which latter position the bearing stand and the assembly can be stored in a space-efficient manner. The handling is simplified here.
The fixing of the assembly in the operative position, preferably in the horizontal orientation, occurs by clamping the bearing projection of the carrier between the triangular plate at the bearing stand side and the support surface of the support, which surface is allocated to this plate and which faces outward. To this end, a threaded stem at the carrier side submerges into a slot opening, which is arranged in the swivel path, of the triangular plate. It is possible to select the slot length such that, on the basis of the stopping of the threaded stem at the slot bottom, the desired position, preferably the horizontal position, is achieved.
The third corner of the triangular plate, which comprises the slot opening, preferably projects from the support at the bearing stand side. The two other corners of the triangular plate are situated in a plane-parallel fashion at a distance from the outward facing surfaces of the allocated support.
In another development of the subject matter of the invention, it is provided that the carrier is constructed as an angle plate, the vertical side of the angle plate forming the bearing projection. The horizontal portion of the angle plate serves for the fastening of the assembly. To this end, it is preferable for the fastening elements to engage approximately in the middle of the carrier. As a result, there is a stable, tilt-proof bearing and fastening of the assembly. In an embodiment, the bearing projection is a trapezoidal projection of a vertical side of the angle plate. It can be advantageously provided that the triangular plate has the contour of an obtuse triangle, with the axis of rotation in the obtuse angle. In this regard, it is also preferable that the side of the triangular plate that is allocated to the support extends parallel to the longitudinal extent of the support, and that the side of the triangle which is allocated to the assembly in the operative position and which comprises the slot opening extends horizontally. The triangular plate can also be constructed as an isosceles triangle, the equal sides being the support side and the horizontal side.
In a preferred embodiment of the inventive subject matter, it is provided that the threaded stem, in the form of a neck of enlarged diameter, verges into the screw handle, which neck rests positively in an end of the slot of enlarged diameter in the captive position. Accordingly, the slot of the triangular plate tapers in the direction of the slot opening in the manner of a bottleneck. To release the immobilization, a back-rotation in the loosening direction of the screw handle is required, until the neck of enlarged diameter of the threaded stem exits the region of the slot, and the region of a smaller diameter of the threaded stem can be swivelled through the slot narrow. The desired working position of the assembly, preferably the horizontal position, is defined by a stop limit for the triangular plate, which stop limit is screwed into the bearing projection. This can be a matter of a peg which is screwed in or some such. It is preferable, however, for the stop limit to be formed by the head of a screw which is provided with a self-cutting thread.
The described height adjustability can be present in that the supports telescope into the legs, and that the fastening means are formed by bolts which can be inserted through openings of the supports and which brace on the margin edges of the legs. To this end, the supports can comprise a plurality of spatially separated openings, preferably evenly spaced. In addition, a protection against the withdrawal of the supports from the legs is also provided. In this regard, it is proposed that the supports, which stand in sleeves, or respectively, in legs shaped in the manner of sleeves, are protected against a complete withdrawal in that a projection which is allocated to the inserted end of the support contacts a stop shoulder arranged in the region of the sleeve mouth. A reversible withdrawal protection can be provided.
A development in which the withdrawal protection is permanently activated upon the first insertion of the supports into the sleeves/legs is preferred, however. It is thus provided that the projection is constructed as a bellied-out portion of the support. Particularly given a development of the support as a square welded pipe, this sort of bellied-out portion is possible by means of concerted outward pressure.
In addition, it is preferable for the stop shoulder to be the face edge of a free tongue of the sleeve wall. This tongue can deflect in a springing manner in the original insertion of the support, in order to subsequently stand in the way of the projection, or respectively, the bellied-out portion of the support, blocking in the withdraw direction. The tongue can already be pushed into the blocking position at the factory. However, it is also possible, given a fixing the height of the support by means of strain elements, to perform the displacement of the tongue into the blocking position in the original loading, directly or indirectly via a clamping element.
The assembly can be formed in the shape of rollers or a tabletop, for example, whereby, with regard to the latter development, it is suggested that the tabletop be a carrier of a table saw and that it comprise, in its central region, a surface portion that can be cut out. To this end, a contour is provided on the tabl
Apolinski Edmund
Daniels David
Ebert Winfried
Noniewicz Zbiegniew
Schueller Hans-Juergen
Bidwell James R.
Schiff & Hardin & Waite
Wolfcraft GmbH
LandOfFree
Bearing stand does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bearing stand, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bearing stand will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2508863