Patent Number: 6,637,820

Title: Methods and apparatus for electrically adjusting a height of a chair

Abstract: A height adjustment mechanism for a chair that enables a height of a chair seat relative to a chair base to be adjusted electrically in a cost effective and reliable manner is described. The height adjustment mechanism includes an electric motor, an upper enclosure member, a lower enclosure member, and a limit switch. The lower enclosure member is coupled to the upper enclosure member, and the electric motor is coupled to at least one of the upper and lower enclosure members to telescopically move at least one of the upper and lower enclosure members relative to the remaining enclosure member. The limit switch is electrically coupled to the electric motor to limit an amount of telescopic movement of at least one of the upper and lower enclosure members.

Inventors: Rogers, III; M. Weldon (St. Louis, MO), Eberle; Robert A. (Kansas City, MO), Mooney; Joseph M. (Florissant, MO), Schwartz; David L. (Creve Coeur, MO)

Assignee: EAC Corporation

International Classification: A47C 1/025 (20060101); A47C 1/022 (20060101); A47C 3/24 (20060101); A47C 3/20 (20060101); F16M 011/28 (); A47C 001/06 ()

Expiration Date: 10/28/2011