US 5,603,517 AGranted

Walkers

AssigneeSiudon Ltd.

InventorShmil Lorman

Life of this patent

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Abstract

A rollable walker for traversing stairs and substantially level surfaces, comprising a frame which includes a left and a right upright members, the left and right upright members including front legs, and an upper segment. The frame further includes a crossbar which is pivotaly connected to the left and a right upright members, the crossbar including a generally U-shaped transverse element and vertically disposed segments acting as rear legs. The crossbar is supported by supporting means. The supporting means is attached or integrally formed with the left and right upright members. A pair of rear wheels and a pair of front wheels engaged by wheel mounts, each wheel having two vertical planar surfaces. The rear wheels are connected to the rear legs, whereas the front wheels are connected to the front legs. The vertical planar surfaces of the wheels are surrounded by protrusions; and, two pairs of braking devices connected to the rear and front legs, each of the braking devices is slidably supported by one of the wheel mounts over one of the wheels in such a way that the application on the frame of a downward force of a magnitude greater than a pre-determined value urges the braking devices against the wheels to brake the walker.

Claims12

Dependent claims

A rollable walker for traversing stairs and substantially level surfaces, comprising:

(a) a frame including:
(i) a left and a right upright member, each of said left and a right upright members including a front leg and an upper segment;
and
(ii) a crossbar being pivotally connected to said left and right upright members, said crossbar including a generally U-shaped transverse element and two segments being rear legs, said crossbar being supported by supporting means, said supporting means being formed connective with said left and fight upright members;
(b) a pair of rear wheel mounts engaging a pair of rear wheels, each of said rear wheels having two substantially circular planar surfaces, each having a periphery, said rear wheels being connected to said rear legs, said planar surfaces of said rear wheels featuring protrusions proximate said peripheries;
(c) a pair of front wheel mounts engaging a pair of front wheels, each of said front wheels having two substantially circular planar surfaces, each having a periphery, said front wheels being connected to said front legs, said planar surfaces of said front wheels featuring protrusions proximate said peripheries;
and
(d) two pairs of braking devices connected to said rear and front legs, each of said braking devices being slidably supported over one of said wheels in such a way that the application on said frame of a downward force of a magnitude greater than a pre-determined value urges said braking devices against said wheels and said protrusions to brake the walker.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/546,327Filed 20 Oct 1995 · continuation in part
Priority: 20 May 1994
Granted: 18 Feb 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

A61H 3/04
Appliances for aiding patients or disabled persons to walk about: wheeled walking aids for patients or disabled persons
A61H 2003/001
Appliances for aiding patients or disabled persons to walk about: on steps or stairways
A61H 2003/046
Wheeled walking aids for patients or disabled persons: with braking means
A61H 2201/0161
Constructive details: size reducing arrangements when not in use, for stowing or transport