Patent ID: 11904365
Assignee: FUMEX AB
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  A  F | IPC A  B

Claim 0:
1. A support arm arrangement for a local gas extractor arrangement, the support arm arrangement comprising:
a first support arm coupled to a plate member adapted to be coupled to an exterior surface,
at least one second support arm, each support arm being pivotally coupled to each other by means of intermediately arranged friction joint arrangements, and
an extractor hood having a first opening provided with a circumferential flange and a second opening through which gas is configured to be extracted from a surrounding environment, wherein the support arm arrangement is adapted to receive a tube device that is adapted to be coupled to the circumferential flange of the extractor hood, wherein the support arrangement comprises a plurality of retainer devices adapted to couple the tube device to the support arms,
wherein:
the extractor hood is arranged at a distance from an end portion of an outermost second support arm by means of an intermediary arranged linkage arm arrangement comprising a first unitary link arm, pivotally coupled to the end portion of the outermost second support arm by means of a first friction joint, the first friction joint being pivotable about a first pivoting axis which extends in a direction perpendicular to an extending direction of the outermost second support arm,
the linkage arm arrangement further comprises a second unitary link arm, fixedly attached to the extractor hood and pivotally coupled to the first link arm by means of a second friction joint, the second friction joint being pivotable about a second pivoting axis which extends in a direction perpendicular to the first pivoting axis, and
the first link arm has an L-shape such that when the tube device is coupled to the support arm arrangement at a radial distance from an outer surface of the tube device, the first link arm is arranged so as to encircle approximately a quarter of a circumference of the tube device, so that the first and second pivoting axes are aligned so as to pass perpendicularly through the tube device.