US 4,374,584 AGranted

Handrail

OwnerNaum Pokhis, Yakov Pokhisinventors

Life of this patent

Estimating the term…

Loading patent…

Abstract

A handrail has an immovable base element extending in one direction, a support element arranged to be grasped by a user and reciprocable relative to the base element, and a drive for reciprocating the support element relative to the base element. The base element may be formed by a usual stationary handrail, may be connected to the latter, or may be formed as a plate. A guiding element guides the support element during its reciprocation. The drive includes an electric motor which is reversible, a spindle member provided with a thread and rotatable by the motor, and a nut member translatorily movable by the rotation of the spindle member and connected with the support element so as to move the latter. Switches are provided for reversing the direction of rotation of the electric motor and thereby the direction of movement of the nut member and the support element.

Claims12

Dependent claims

A handrail comprising an elongated stationary base element;

a support element adapted to be grasped by and support a user, said support element being movable relative to said base member in a direction of elongation thereof;
means for moving said support element relative to said base element, said moving means being means for reciprocating said support element relative to said base element and including a motor and transmission means which is driven by said motor and engaged with said support element so as to reciprocate the latter, said motor being reversible, and said transmission means including a screw member rotated by said motor, and a nut member which is connected with said support element and through which said screw extends so that when said motor rotates said screw in two opposite directions said nut member and thereby said support element connected thereto reciprocate relative to said base member;
and a guiding member which is immovably connected to said base element and extends through said nut member in the direction of elongation whereby said nut member is guided by said guiding member during the reciprocation.

Dependencies are inferred from the claim text.