Jack, especially for the change of the position of the seat base in a wheelchair
AssigneeReac Poland Sp. Z O.O.
InventorFrank LYKKEGAARD
Life of this patent
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Abstract
Disclosed here is a jack for the change of a position of the seat base in a wheelchair. The jack has, in the lower frame (1), the driving system of the screw jack with a vertical screw (14) is fixed; and the upper end of the screw (14) is pivotally fixed in the main arms (3) of the scissors system. The driving system of the screw (14) of the screw jack is fixed to the base (11) attached slideably to the lower frame (1) in the tracks (8) in such a way that the screw (14) is permanently in a perpendicular position to the lower frame (1) and the upper frame (2) with maximum deviation of ±10°; and the base (11) is driven by the arms (17), with their first ends fixed pivotally in the main arms (3), and the other ends fixed pivotally in the base (11).
Claims7
A jack for the change of a position of a seat base in a wheelchair, comprising of a fixed lower frame and a movable upper frame connected with the lower frame, with a scissors lifting system whose arms join the lower frame with the upper frame, characterized by the fact that in the lower frame (1) the driving system of the screw jack with a vertical screw (14) is fixed;
- and the upper end of the screw (14) is pivotally fixed in the main arms (3) of the scissors system.
Dependencies are inferred from the claim text.