Abstract: An adjustable chair-armrest assembly includes a positioning plate attached to a chair seat, and a coupling seat having two side walls with inverted V-shaped top edges, and a bottom wall rotatably mounted over the plate by a vertical pivot pin. The plate has several equidistant positioning holes which are all spaced apart from the pivot pin at a predetermined distance. A ball is provided on the bottom wall and is biased to engage a selected one of the positioning holes so as to position the coupling seat on the plate. A tilting seat is pivoted on the coupling seat in such a manner that the tilting seat can swing on the coupling seat. An armrest member has a wrist receiving element attached to a front end portion thereof and is mounted movably on the tilting seat in such a manner that the armrest member can be moved forward and rearward on the tilting seat.

Abstract: An adjustable chair-armrest assembly includes an chair-armrest assembly includes an elongated positioning plate attached to a chair seat, an elongated coupling seat mounted pivotally on the positioning plate and rotatable about a vertical axis, and an elongated tilting seat mounted pivotally on the coupling seat and rotatable about a horizontal axis. An armrest member is mounted movably on the tilting seat and can be moved along the length of the tilting seat. An inclination adjusting device includes a slot element which is secured to the rear end portion of the coupling seat and which has several horizontal slots extending in a direction transverse to the coupling seat, and an engagement having an upper end portion pivoted to the rear end portion of the coupling seat, and a lower end with a projection projecting therefrom into a selected one of the slots of the slot element. A spring biases the projection to engage the selected one of the slots.

Abstract: The chair includes a first inverted U-shaped frame which has two arms defining a back portion and two extensions respectively extending from the two arms to define a seat portion. The two arms have a pair of tabs each with a notch. A first connecting rod is attached to the free ends of the two extensions. Two spaced second U-shaped frames each include a front leg and a rear leg with a threaded bolt provided at the topmost portion thereof. The first connecting rod is mortised to the front legs while a second connecting rod is mortised to the rear legs below the threaded bolt when the chair is assembled. At that configuration, the notch of the tab rests on the threaded bolt.

Abstract: An improved multiple seat chair structure is disclosed which includes a pair of longitudinally spaced, vertically oriented, end support members; a longitudinally extending brace member fixed to and interconnecting the end support members; at least one intermediate support member positioned between the end support members, each of the intermediate support members including a vertically extending leg member thereon having an upper end portion; first and second seat sections carried by the various support members, the seat sections each including first and second side rail members thereon and a seat member extending between and supported by the side rail members; and at least one generally wedge-shaped fitting rigidly interconnecting the leg member, the brace member and at least one of the side rail members from each of two of the seat sections.