Chair with synchronized rocking seat and backrest

• US 6,511,128 B2
• Filed: 06/07/2001
• Issued: 01/28/2003
• Est. Priority Date: 06/09/2000
• Status: Expired due to Fees

• Current Assignee: Pro-Cord SpA
• Original Assignee: Pro-Cord SpA
• Inventors: Piretti, Alessandro
• Primary Examiner(s): Crown, Peter R.
• Assistant Examiner(s): D ADAMO, STEPHEN D
• Application Number:
  US09/876,852
• Publication Number:
  US 20020005658A1
• Time in Patent Office: 600 Days
• Field of Search: 297/300.1, 297/300.3, 297/320, 297/302.3, 297/302.4
• US Class Current: 297/300.4
• CPC Class Codes: A47C 3/026 with central column, e.g. rocking office chairs; Tilting chairs
• CPC Class Codes: A47C 7/402 adjustable in height
• CPC Class Codes: A47C 7/443 with coil springs
• CPC Class Codes: A47C 7/444 of torsion type
• CPC Class Codes: A47C 7/445 with bar or leaf springs

Abstract

Chair with synchronized rocking seat and backrest, comprising:

a base support (14),

a backrest supporting structure (18), connected to the base support (14) so to rock on a transversal axis (A), and

a seat supporting structure (16) rocking on the base support (14) in a synchronized way with respect to the rocking movement of the backrest supporting structure (18).

The backrest supporting structure presents, on each side of the chair, a bent metallic rod comprising: an anchoring portion (26) fastened to the base support (14), a riser section (28) which extends upwards, and an elastically deformable area (30) permitting the riser section (28) to rock on the transversal axis (A) with respect to the anchoring portion (26). The seat supporting structure (16) presents, on each side of the chair, a metallic rod (56) comprising: an anchoring portion (58) fastened to the base support (14), a lower section (60), an upper section (64) and an elastically deformable connecting portion (62) arranged between the lower section (60) and the upper section (64). Connection devices (84, 85) are provided between the upper section (64) and the seat supporting structure (16) and the backrest supporting structure.

Claims

1. Chair with synchronised rocking seat and backrest, comprising:

a base support (14),

a backrest supporting structure (18), connected to the base support (14) so to rock on a transversal axis (A), and

a seat supporting structure (16) rocking on the base support (14) in a synchronised way with respect to the rocking movement of the backrest supporting structure (18),

characterized in that

the backrest supporting structure presents, on each side of the chair, a bent first metallic rod comprising;

an anchoring portion (26) fastened to the base support (14), a riser section (28) which extends upwards, and an elastically deformable area (30) permitting the riser section (28) to rock on said transversal axis (A) with respect to the anchoring portion (26),

and in that the seat supporting structure (16) presents, on each side of the chair, a second metallic rod (56) comprising;

an anchoring portion (58) fastened to the base support (14), a lower section (60), an upper section (64) and an elastically deformable connecting portion (62) arranged between the lower section (60) and the upper section (64),

and that connection devices (84, 85) are provided between the upper section (64) of the seat supporting structure (16) and the backrest supporting structure.

2. Chair according to claim 1, characterized in that said connection devices comprises, on each side of the chair, a shoe (84), which can freely slide on the straight section of the backrest supporting structure (18).

3. Chair according to claim 1, characterized in that the backrest supporting structure (18) comprises a frame (34), which position can be adjusted vertically along the riser sections (28) of the backrest supporting structure.

4. Chair according to claim 3, characterized in that said frame (34) of the backrest supporting structure (18) holds a tubular fabric element (98) taut between two arched lateral sections (38).

5. Chair according to claim 1, characterized in that the seat supporting structure (16) holds a tubular fabric element (90) taut between said upper sections (64) on each side of the chair.