Supports – Machinery support – Movable machine
Patent
1993-11-01
1996-10-01
Chotkowski, Karen J.
Supports
Machinery support
Movable machine
24528911, 245550, 245 75, 245 81, F16M 1300
Patent
active
055605834
DESCRIPTION:
BRIEF SUMMARY
The subject invention concerns an arrangement in extractor cranes comprising an arm arranged to mount an extractor and/or some other equipment, said arm being articulated by means of one of its arms to a support with the intermediary of a mounting bracket, so as to be allowed to pivot or swing essentially in the horizontal plane, a retaining device acting between the arm and the bracket or the support for the purpose of maintaining the arm in the set position of pivot thereof.
A device of the kind referred to is generally known from SE, C, 7706374-1, corresponding to SE, B, 423 059.
With the prior-art device it is necessary, when the extractor or other piece of equipment is to be mounted on or suspended from the pivotable arm, to exert a braking force on the ball-bearing mounted joint in the bracket with the aid of a braking element. This braking element is adjustable so as to allow regulation of the frictional force. However, the pressure required to prevent unintentional pivotal movement of the arm is quite considerable.
The disadvantages found in this prior-art device are, primarily, that the operator needs to exert considerable force in order to be able to pivot the arm against the action of the frictional force, and secondly, that the frictional force will change as the braking element wears out from use, with consequential need for resetting.
In order to obviate these and other disadvantages, the subject invention proposes to fit the retaining device with a retaining element which is actuated by means of a power actuator arranged, by overriding the retaining force, to allow the desired pivotal movement of the arm, and to provide for remote control of the actuator from a place spaced from said one end of the arm.
The invention will be described in closer detail in the following with reference to the accompanying drawings, wherein
FIG. 1 is a perspective view obliquely from below of an extractor crane, and
FIGS. 2 and 3 illustrate in respectively a lateral view and a longitudinal sectional view one end of an arm incorporated in the extractor crane of FIG. 1 and a retaining device cooperating therewith.
The extractor crane illustrated in the drawing figures and generally designated by reference 1 is fitted with an essentially horizontally directed arm 2 of a suitable material, preferably a tubular steel section. The arm 2 may be a one-piece section, as illustrated, or consist of two or several mutually articulated sections, depending on the desired range of the extractor crane 1.
The arm 2 is arranged to serve as a support or a suspension means for a fume extractor 3 of a prior-art design including a fan 4, hoses 5, tubes 6, and a hood 7 for extraction of the air-polluting substances (welding fumes) that are generated for instance during welding operations, and/or optionally for other equipment, such as welding-wire feeders 8, cables, hand tools and the like.
At one 9 of its ends the arm 2 is fitted with a vertically directed bearing tube 10, preferably secured to the arm through welding, which bearing tube 10 encloses and by means of suitable bearings 11 is mounted on a vertically directed spindle 12, thus allowing pivotal movements of the arm 2 essentially in the horizontal plane. Nuts 13 or similar means secure the spindle 12 non-rotationally between two vertically spaced and horizontally projecting lugs 15 which are secured, preferably through welding, to a mounting bracket 14. In accordance with the embodiment illustrated in the drawings, the mounting bracket 14 consists of a flat plate which by means of bolts 16 or similar fasteners extending through holes made in the plate, may be mounted on a support 17, preferably a wall, a stanchion or the like.
In order to retain the arm 2 of the extractor crane 1 together with the equipment 3, 8 mounted thereon in the desired angular position in which it is set, a retaining device, generally designated by reference 18, is arranged so as to act between said one end 9 of the arm 2 and, in the embodiment illustrated, the bracket 14.
Generally speaking, the reta
REFERENCES:
patent: 3096933 (1963-07-01), Bora
patent: 3576988 (1971-05-01), Henning
patent: 4185801 (1980-01-01), Plymoth
patent: 4307672 (1981-12-01), Shikmi
patent: 4541327 (1985-09-01), Lundstrom
patent: 4886237 (1989-12-01), Dennis
patent: 4998693 (1991-03-01), Wiebe
Chotkowski Karen J.
Plymovent Aktiebolag
LandOfFree
Apparatus for supporting and positioning equipment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for supporting and positioning equipment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for supporting and positioning equipment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1498496