부산대학교 도서관

An adjustable work surface support for use with a primary work surface and a secondary work surface comprising primary work surface connecting means; secondary work surface connecting means; a parallelogram link support comprising a support bar mounted to the primary work surface connecting means to define a first axis; and a pair of parallel arms, each arm attached at one end to the support bar and a second end attached to the secondary work surface connecting means to define a second axis, a connecting plate, attached adjacent one of the parallel arms to the primary and secondary work surface connecting means; having a first pivot point rotatable about the first axis and a second pivot point being rotatable about the second axis; such that when the arm is pivoted about the first axis, an angular position of the secondary work surface with respect to the primary work surface is substantially constant.