# US 9,775,434 B2 · Drive device for moveable furniture component

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- Number: US 9,775,434 B2
- Document ID: US9775434B2
- Status: Granted
- Kind: B2
- Application number: 14/308,799
- Filed: 2014-06-19
- Published: 2014-10-09
- Granted: 2017-10-03
- Earliest claimed: 2011-12-27
- Assignees: Julius Blum GmbH
- Applicants: Julius Blum GmbH
- Inventors: Alexander Simon Flogaus
- Web page: https://patentgrep.com/patent/US9775434B2

## CPC

- A47B 88/467: self-closing
- A47B 88/47: having both self-opening and self-closing mechanisms which interact with each other
- E05F 1/16: for sliding wings
- A47B 2210/0078: Drawers with parallel guidance or synchronization by pinion-shaft linkages
- E05Y 2201/62: Synchronisation of suspension or transmission members
- A47B: TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE (furniture jointing F16B)
- 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 drive device for a movable furniture component, particularly for a drawer, includes an ejection device having an ejection force accumulator for ejecting the movable furniture component into an open position, and a retraction device having a retraction force accumulator for retracting the movable furniture component from an open position into a closed position. The ejection force accumulator can be charged by the retraction force accumulator during retraction of the movable furniture component.

## Claims

### Claim 1

A drive device for a moveable furniture part, said drive device comprising:
an ejection device having an ejection force accumulator configured to eject the moveable furniture part into an open position; and
a retraction device having a retraction force accumulator configured to retract the moveable furniture part from the open position into a closed position;
wherein said ejection force accumulator is further configured to be loaded by said retraction force accumulator upon retraction of the moveable furniture part; and
wherein said retraction force accumulator is further configured to serve as an assistance force accumulator for assisting said ejection force accumulator in ejecting the moveable furniture part.

### Claim 2 (depends on 1)

The drive device as set forth in claim 1, wherein the open position is an intermediate open position, said ejection force accumulator being configured to move the moveable furniture part out of the closed position into the intermediate open position without assistance.

### Claim 3 (depends on 2)

The drive device as set forth in claim 2, wherein said retraction force accumulator is configured to serve as said assistance force accumulator to move the moveable furniture part from the intermediate open position into a fully open position.

### Claim 4 (depends on 1)

The drive device as set forth in claim 1, wherein the open position is one of an intermediate open position and a fully open position, said retraction force accumulator is configured to serve as said assistance force accumulator to move the moveable furniture part from the intermediate open position into the fully open position.

### Claim 5 (depends on 1)

The drive device as set forth in claim 1, wherein the open position is a fully open position, said assistance force accumulator is configured to move the moveable furniture part out of the closed position into an intermediate open position without assistance.

### Claim 6 (depends on 5)

The drive device as set forth in claim 5, wherein said ejection force accumulator is configured to move the moveable furniture part from the intermediate open position into the fully open position.

### Claim 7 (depends on 1)

The drive device as set forth in claim 1, wherein said ejection force accumulator and said assistance force accumulator are configured to move the moveable furniture part serially in succession upon ejection.

### Claim 8 (depends on 1)

The drive device as set forth in claim 1, wherein each of said ejection force accumulator and said retraction force accumulator is a spring, a spring constant of said ejection force accumulator being less than a spring constant of said retraction force accumulator.

### Claim 9 (depends on 8)

The drive device as set forth in claim 8, wherein each of said ejection force accumulator and said retraction force accumulator is a compression spring.

### Claim 10 (depends on 1)

The drive device as set forth in claim 1, further comprising:
a housing to be arranged on a furniture carcass;
a retraction slider configured to be acted upon by said retraction force accumulator and displaceable along a sliding guide track in or on said housing, said retraction slider being lockable in a locking position in said sliding guide track; and
an ejection slider configured to be acted upon by said ejection force accumulator and displaceable along an ejection sliding guide track in or on said housing, said ejection slider being lockable in a locking position in said ejection sliding guide track.

### Claim 11 (depends on 10)

The drive device as set forth in claim 10, wherein said sliding guide track has a curved portion, said retraction slider being lockable in the locking position in said curved portion of said sliding guide track; and
wherein said ejection sliding guide track has a cardioid-shaped portion, said ejection slider being lockable in the locking position in said cardioid-shaped portion of said ejection sliding guide track.

### Claim 12 (depends on 10)

The drive device as set forth in claim 10, wherein said ejection force accumulator is fixed to said housing and to said retraction slider.

### Claim 13 (depends on 10)

The drive device as set forth in claim 10, wherein said retraction force accumulator is fixed to said retraction slider and to said ejection slider.

### Claim 14 (depends on 10)

The drive device as set forth in claim 10, wherein said retraction slider and said ejection slider are moveable serially in succession along said housing.

### Claim 15 (depends on 10)

The drive device as set forth in claim 10, further comprising entrainment members attached to the moveable furniture part, said retraction slider and said ejection slider configured to be coupled to and de-coupled from said entrainment members.

### Claim 16 (depends on 1)

The drive device as set forth in claim 1, further comprising a damping device for damping a retraction movement of the moveable furniture part, the retraction movement being triggered by said retraction force accumulator.

### Claim 17 (depends on 1)

An article of furniture comprising:
a furniture carcass;
a moveable furniture part;
said drive device as set forth in claim 1 for moving said moveable furniture part relative to said furniture carcass.