# US 11,724,914 B2 · Rack for a stairway guide, and a method of providing a stairway guide comprising a rack

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- Number: US 11,724,914 B2
- Document ID: US11724914B2
- Status: Granted
- Kind: B2
- Application number: 16/766,412
- Filed: 2018-11-26
- Published: 2020-11-19
- Granted: 2023-08-15
- Earliest claimed: 2017-11-24
- Assignees: Devi-Group BV
- Applicants: Devi-Group B.V.
- Inventors: Dennis Vroegindeweij
- Web page: https://patentgrep.com/patent/US11724914B2

## CPC

- B66B 9/0815: {Rack and pinion, friction rollers}
- B66B 7/022: {with a special shape}
- B66B 7/023: {Mounting means therefor}
- B66B: ELEVATORS; ESCALATORS OR MOVING WALKWAYS ({apparatus for raising or lowering persons on theatrical stages or the like A63J5/12} ; funicular railbound systems with rigid ground-supported tracks and cable traction, e.g. cliff railways, B61B9/00; arrangements of ammunition handlers in vessels B63G3/00; hoists, lifts, or conveyors for loading or unloading in general B65G; braking or detent devices controlling normal movements of winding drums or barrels B66D; ship-lifting devices E02C; garages for many vehicles with mechanical means for lifting vehicles E04H6/12; hoists for feeding ammunition or projectiles to launching apparatus or to loading mechanisms F41A9/00)

## Abstract

A rack for a stairway guide suitable for providing good grip in curves comprises a bendable strip body, said bendable strip body comprising a first main side and a second main side, the first main side being provided with a series of equidistant engagement elements, each element being chosen from i) a hole, and ii) a protrusion. Both longitudinal sides are provided with a series of indentations. Being bendable, a stairway guide can be manufactured easily by bending the rack in the desired shape defined by the stairway guide.

## Claims

### Claim 1

A rack for a stairway guide, wherein the rack comprises a bendable strip body;
wherein said bendable strip body comprises
a first main side and a second main side, the first main side being provided with a series of equidistant engagement elements, wherein said elements of the strip body are holes, and
two longitudinal sides, wherein the strip body comprises a series of indentations at both longitudinal sides of the strip body, wherein the indentations comprise blind ends, said blind ends being located in the longitudinal direction of the strip body halfway between two adjacent holes.

### Claim 2 (depends on 1)

The rack according to claim 1, wherein the indentations are defined by edges of the strip body, at least one of said edges comprising a shoulder.

### Claim 3 (depends on 2)

The rack according to claim 2, wherein the elements comprise a wall section adjacent to the first main side, said wall section being inclined at an angle of less than 30 degrees to the centerline of the element.

### Claim 4 (depends on 3)

A method of providing a stairway guide, wherein a stairway guide body is provided with a rack, wherein the rack is a rack according to claim 3.

### Claim 5 (depends on 4)

The method according to claim 4, wherein a stairway guide comprises a stairway guide body comprising at least one deviation from straight chosen from a turn or knick, wherein the rack is bent to accommodate for the deviation and attached to the guiderail body.

### Claim 6 (depends on 5)

The method according to any of the claim 5, wherein the stairway guide body comprises a material comprising aluminium or plastic, and the rack is mounted using self-tapping screws.