A chair includes a back member and arm brackets. The back member is tapered toward an end that is adjacent to a seat. The arm brackets are attached under a bottom portion of the seat. Each arm bracket is adjustable to provide a seat clearance area for the seat when one or more of the arm brackets are adjusted up to approximately 90 degrees from an original upright position.

A chair includes a back member and arm brackets. The back member is tapered toward an end that is adjacent to a seat. The arm brackets are attached under a bottom portion of the seat. Each arm bracket is adjustable to provide a seat clearance area for the seat when one or more of the arm brackets are adjusted up to approximately 90 degrees from an original upright position.

A lower chair for supporting an upper chair on which a user sits. The lower chair including a base, a swivel mechanism supported by the base and defining a vertical swivel axis, and a four-bar linkage mounted to the swivel mechanism for rotation about the swivel axis. The four-bar linkage includes a coupler link that moves about a coupler curve. The lower chair also includes a column having a lower end affixed to the coupler link for movement of the lower end along the coupler curve. The column defines a column axis and is adapted to support the upper chair.

A piece of furniture, in particular a piece of seating furniture, has a base part on which a movable furniture part is pivotably mounted via at least one pivot fitting, wherein the at least one pivot fitting is fixed to the base part by means of a first lever and is fixed to the movable furniture part by means of a second lever which is arranged pivotably with respect to the first lever, and a method for assembling a piece of furniture.

A piece of furniture, in particular a piece of seating furniture, has a base part on which a movable furniture part is pivotably mounted via at least one pivot fitting, wherein the at least one pivot fitting is fixed to the base part by means of a first lever and is fixed to the movable furniture part by means of a second lever which is arranged pivotably with respect to the first lever, and a method for assembling a piece of furniture.

A cam adjustment device for lifting and lowering an armrest includes an armrest assembly and a support frame. The armrest assembly includes a connection base. The support frame has a support rod. The connection base is slidably connected to the support rod. A locking mechanism includes a cam wrench disposed on the connection base and rotatably installed on the connection base. The cam wrench is rotated such that a cam on the cam wrench presses and acts on the support rod. In a locked state, the cam wrench presses the support rod such that the connection base and the support rod are kept to be relatively fixed. In an unlocked state, the cam wrench is rotated to allow the cam to be released from the support rod, such that the connection base is lifted, lowered, and adjusted relative to the support rod.

A patient support apparatus includes a frame, a stationary member mounted relative to the frame, a movable member having a pivot member rotatably mounting the movable member about the stationary member, and a fastener securing the pivot member to the stationary member. The patient support apparatus also includes a joint between the pivot member and the stationary member, which is configured to apply a tension force on the fastener.

A patient support apparatus includes a frame, a stationary member mounted relative to the frame, a movable member having a pivot member rotatably mounting the movable member about the stationary member, and a fastener securing the pivot member to the stationary member. The patient support apparatus also includes a joint between the pivot member and the stationary member, which is configured to apply a tension force on the fastener.

A backrest includes: a backrest body against which a seated person leans a back thereof, a backrest support positioned behind and supporting the backrest body; and an armrest body provided outside in a width direction of the backrest body and supported by the backrest support so as to move up and down at a position separated from the backrest body. A chair includes the above-described backrest.

A backrest includes: a backrest body against which a seated person leans a back thereof, a backrest support positioned behind and supporting the backrest body; and an armrest body provided outside in a width direction of the backrest body and supported by the backrest support so as to move up and down at a position separated from the backrest body. A chair includes the above-described backrest.