# US 10,246,923 B2 · Damping or return device for sliding door leaves or for drawers

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- Number: US 10,246,923 B2
- Document ID: US10246923B2
- Status: Granted
- Kind: B2
- Application number: 15/525,684
- Filed: 2015-11-06
- Published: 2017-11-09
- Granted: 2019-04-02
- Earliest claimed: 2014-11-11
- Assignees: Bortoluzzi Sistemi S.P.A.
- Applicants: Bortoluzzi Sistemi S.P.A.
- Inventors: Guido Bortoluzzi; Adriano Girotto; Lucio Moliner
- Web page: https://patentgrep.com/patent/US10246923B2

## CPC

- E05F 5/003: {for sliding wings (Fasteners specially adapted for holding sliding wings open E05D13/04)}
- E05F 5/02: specially for preventing the slamming of {swinging} wings {during final closing movement, e.g. jamb stops}
- E05F 5/027: {with closing action}
- E05Y 2201/46: Magnets
- E05Y 2900/132: Doors
- E05Y 2900/20: for furniture, e.g. cabinets
- E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF

## Abstract

A damping or return device for sliding door leaves, particularly for furniture, or for drawers, which is constituted by a pin the shank of which is constituted by a diametrically differently-polarized magnet that slideably and axially interacts with a steel plate or a complementarily-shaped collar, which is made of steel and polygonal.

## Claims

### Claim 1

A damping or return device for sliding door leaves or for drawers, comprising:
a pin having a shank constituted by a diametrically differently-polarized magnet that comprises mutually coupled first and second portions having opposing polarities;
at least one of a steel plate or a complementarily-shaped steel collar polygonal in cross-section, wherein the pin slideably and axially interacts with the steel plate or collar; and
an elastically compressible element arranged to damp movement of the pin as the pin moves in contrast with the elastically compressible element.

### Claim 2 (depends on 1)

The device according to claim 1, wherein the pin has a first head which is polygonal in plan view with a H-shaped transverse cross-section, from which the shank, diametrically polarized differently, and substantially square or rectangular, protrudes axially, an end tip of which is V-shaped or rounded.

### Claim 3 (depends on 2)

The device according to claim 2, wherein an end of the elastically compressible element has an insert which can slide, the insert having a second head which is shaped complementarily to the end tip of the pin.

### Claim 4 (depends on 1)

The device according to claim 1, wherein the pin has a first head which is polygonal in plan view with a H-shaped transverse cross-section, from which the shank, diametrically polarized differently, and substantially circular, protrudes axially, an end tip of which is V-shaped or rounded.

### Claim 5 (depends on 2)

The device according to claim 2, wherein the shank of the pin is diametrically polarized differently and is therefore, from the magnetic point of view, divided into a first half-shank and a second half-shank, which are coupled together and are mutually identical, being polygonal in cross-section and having opposing polarities, the first half-shank having a north polarity and the second half-shank having a south polarity.

### Claim 6 (depends on 5)

The device according to claim 5, wherein the steel plate is C-shaped in cross-section so as to define a first wing and a second wing which, when the pin interacts with the steel plate, are arranged facing toward, without contact, the first half-shank and the second half-shank, the first wing and the second wing spaced apart a dimension to accommodate between them, without contact, the shank of the pin which can thus slide freely without sliding friction, the plate having a base connecting the first wing and the second wing.

### Claim 7 (depends on 4)

The device according to claim 4, wherein the elastically compressible element is associated with and protrudes at right angles from a first appendage which is in turn associated with and protrudes radially from the first head of the pin, the elastically compressible element being arranged substantially parallel to the shank in the direction of the end tip of the shank, the end tip of the elastically compressible element interacting in abutment with a second appendage which protrudes radially from the collar.

### Claim 8 (depends on 4)

The device according to claim 4, wherein the complementarily-shaped collar is associated with at least one outer lateral surface of a drawer of the type with rails for the sliding thereof with respect to a frame of an item of furniture, the complementarily-shaped collar being associated with the at least one outer lateral surface by way of a first bracket shaped like an Ω (omega) which is fixed with screws at perforated wings to the lateral surface, the pin being arranged parallel to a bottom of the frame, at a height such as to bring it into axial alignment with the complementarily-shaped collar, by way of a second bracket which is provided with means of coupling which are shaped complementarily to the first head of the pin.

### Claim 9 (depends on 1)

The device according to claim 1, wherein the elastically compressible element comprises a spring.

### Claim 10 (depends on 1)

The device according to claim 1, wherein the elastically compressible element, the length of which is shorter than that of the plate or collar, is arranged to move without sliding friction.

### Claim 11

A damping device for sliding door leaves or for drawers, comprising:
a pin with an elongated shank, wherein the shank is formed of first and second magnet portions coupled diametrically opposite each other and having opposing polarities;
a steel collar having an opening for slideably receiving the elongated shank; and
an elastically compressible element arranged to damp movement of the pin as the pin is slideably received in the opening on the steel collar.

### Claim 12 (depends on 11)

The device according to claim 11, wherein the pin has a first head which protrudes from the elongated shank and has a at least one of a square, rectangular or circular cross-section.

### Claim 13 (depends on 11)

The device according to claim 11, wherein the elongated shank has an end tip having an end tip shape being at least one of a V-shape or a rounded-shape and an end of the elastically compressible element has an insert shaped complementarily to engage the end tip of the elongated shank.

### Claim 14 (depends on 11)

The device according to claim 11, wherein the elongated shank has a polygonal cross-section.

### Claim 15 (depends on 11)

The device according to claim 11, wherein the opening is defined by steel collar and has a polygonal cross-section.

### Claim 16 (depends on 11)

The device according to claim 11, wherein the steel collar is defined by a plate having a first wing and a second wing connected by a base, the first wing and the second wing spaced apart a distance to define the opening that receives the elongated shank without contact so to the elongated shank can slide freely without sliding friction.

### Claim 17 (depends on 11)

The device according to claim 11, wherein the elastically compressible element comprises a spring being shorter than the collar.

### Claim 18 (depends on 17)

The device according to claim 17, wherein the spring is disposed in the opening of the collar.

### Claim 19 (depends on 17)

The device according to claim 17, wherein the spring is arranged substantially parallel to the shank and disposed outside the opening, the spring interacting with an appendage which protrudes extends from the collar.

### Claim 20

A damping device for furniture comprising:
a pin with an elongated shank configured to be coupled to a first lateral surface of the furniture, wherein the shank is formed of first and second magnet portions coupled diametrically opposite each other and having opposing polarities;
a steel collar configured to be coupled to a second lateral surface of the furniture that slides parallel to the first lateral surface between an open position and a closed position, the collar having an opening for slideably receiving the elongated shank when the first and second lateral surfaces move from the open position to the closed position; and
an elastically compressible element arranged to damp movement of the pin, wherein the elastically compressible element compresses as the pin is slideably received in the opening of the elongated shank.