Chair with backrest and rotating damper device

• US 20020158495A1
• Filed: 10/16/2001
• Published: 10/31/2002
• Est. Priority Date: 02/18/2000
• Status: Active Grant

• Current Assignee: Sugatsune Kogyo Co., Ltd.
• Original Assignee: Sugatsune Kogyo Co., Ltd.
• Inventors: Kazuyoshi, Oshima, Masuda, Hiroyuki
• Granted Patent: US 6,705,677 B2
• Time in Patent Office: Days
• US Class Current: 297/300.4
• CPC Class Codes: A47C 1/03238 by means of peg-and-notch or pawl-and-ratchet mechanism
• CPC Class Codes: A47C 1/03255 with a central column, e.g. rocking office chairs
• CPC Class Codes: A47C 1/03266 with adjustable elasticity
• CPC Class Codes: A47C 1/03272 with coil springs
• CPC Class Codes: A47C 1/03274 of torsion type
• CPC Class Codes: A47C 1/03294 slidingly movable in the base frame, e.g. by rollers
• CPC Class Codes: F16F 9/145 involving only rotary movement of the effective parts wing closers or openers with fluid brakes of the rotary type E05F3/14

Abstract

A forward end part of an arm part 53 of a seatback frame is connected to a forward end part of a main frame 3 such that the forward end part of said arm part 53 can turn about a horizontal axis 61 extending leftward and rightward. A cam hole 71 is formed in a forward end part of the arm part 53. A shaft part 72 movably engageable with the cam hole 71 through a roller 73 is disposed at a forward end part of a seat frame 41. The cam hole 71, the shaft part 72 and the roller 73 constitute a positive motion mechanism 70 for causing a seat frame 41 to be tilted in accordance with the turning motion of the arm part 53.

Claims