US 4,789,071 AGranted

Displacement and locking means

OwnerSvante Larssoninventor

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Abstract

A device in a plane supported between columns by means of hooks cooperating with the columns in a locking position for adjusting and locking the plane in different positions along the columns. In known devices of this type shifting of the plane from one position to another is troublesome and time-consuming and, further, no change of the distance between the columns is permitted. In order to make this possible the hooks (2) are connected to the plane (5) by means of links (3) articulatedly connected with the plane and pivotally connected with each their link (3) in a hinge (8), said links being pivotable, one before the other, to withdraw the respective hook (2) from locking engagement with the column (1), by which displacement of the plane can take place in one direction as well as the other, a support means (8) being associated with each hook (2) and serving in locking position as a support for the hook against the respective column (1).

Claims4

Dependent claims

In combination with a support having opposite edge portions disposed between two columns having a plurality of holes which lie in a common plane:

means for releasably locking said opposite edge portions to said columns, said means including each of said edge portions having a link having a first end pivoted to each said respective edge portion for rotating toward and away from each said respective column about an axis which is transverse to said common plane, each said link having a second end to which a first end of a hook is pivoted for rotation about an axis parallel to said transverse axis, said hooks having tips at their first ends which upon pivoting of the hooks in a first direction move into locking engagement with said holes and upon pivoting of the hooks in an opposite direction move out of locking engagement with said holes respective columns so as to permit adjustment of the support along said columns, said links upon pivoting movement toward their respective columns making it possible for the hooks to lockingly engage their respective columns when the distance between the columns is increased, and means limiting pivoting movement of said links away from their respective columns when said hooks are in locking engagement with each said respective columns.

Dependencies are inferred from the claim text.