A system for managing the elevation of a workstation, the system comprising a frame, a worktop having an upper worksurface, at least a first powered vertical-displacement drive mechanism connected between the frame and the worktop and arranged to selectively vertically displace the worktop with respect to the frame, a presence sensor and a processor linked to the drive mechanism and the sensor, the processor using information from the presence sensor to track user presence at the workstation and, upon detecting that the workstation is unoccupied, automatically controlling the drive mechanism to move the worktop from a current height to a scheduled height.

A chair can include a chair back, or backrest, that is coupled to a base of a chair above a seat of the chair. A tilt mechanism can attach the backrest to the base. In some embodiments, the tilt mechanism can be configured so that the backrest rotates about multiple pivots as it reclines from an upright position to a reclined position to drive motion of the seat during recline of the backrest.

A gas cylinder includes: a base tube including a cavity; a spindle inserted into the cavity and performing a reciprocating motion in a longitudinal direction of the base tube; a cylinder mounted in the spindle and charged with gas; a piston dividing the cylinder into an upper chamber and a lower chamber; a valve portion sealing an upper portion of the cylinder and including a pipe holder having a cavity through which the gas is introduced; a flow prevention portion inserted into the spindle and having an inner surface contacting a surface of the spindle; and a spindle guide disposed between the base tube and the spindle and mounted to include at least a portion of the flow prevention portion.

A gas cylinder includes: a base tube including a cavity; a spindle inserted into the cavity and performing a reciprocating motion in a longitudinal direction of the base tube; a cylinder mounted in the spindle and charged with gas; a piston dividing the cylinder into an upper chamber and a lower chamber; a valve portion sealing an upper portion of the cylinder and including a pipe holder having a cavity through which the gas is introduced; a flow prevention portion inserted into the spindle and having an inner surface contacting a surface of the spindle; and a spindle guide disposed between the base tube and the spindle and mounted to include at least a portion of the flow prevention portion.

Presented is a seating apparatus that is enabled to allow a doctor or a surgeon to achieve an appropriate sitting posture during surgery. The seating apparatus includes a seat mount, a strut, a back-rest, a pedal, a seat and a support base. The seat is connected to the seat mount through a fastening means such that the seat is suspended over the seat mount leaving a gap between the seat and the seat mount. The pedal is operatively coupled to a lower end of the strut and the pedal is configured to adjust height of the seat in a hands-free manner. The seating apparatus is modular and it provides an option to user to easily disassemble various components of seating apparatus for easy portability of the seating apparatus.

Presented is a seating apparatus that is enabled to allow a doctor or a surgeon to achieve an appropriate sitting posture during surgery. The seating apparatus includes a seat mount, a strut, a back-rest, a pedal, a seat and a support base. The seat is connected to the seat mount through a fastening means such that the seat is suspended over the seat mount leaving a gap between the seat and the seat mount. The pedal is operatively coupled to a lower end of the strut and the pedal is configured to adjust height of the seat in a hands-free manner. The seating apparatus is modular and it provides an option to user to easily disassemble various components of seating apparatus for easy portability of the seating apparatus.

An active seating apparatus having a seat, a post configured for selectively engaging and supporting the seat and having a lower end opposite the upper end and seat formed with a post locking feature, and a base having an upper wall and an upwardly-opening receiver formed in the upper wall configured for selective removable receipt of the lower end of the post, the receiver having a receiver locking feature configured for selective locking engagement with the post locking feature upon insertion of the post within the base in selectively and securely assembling the post on the base through engagement of the post and receiver locking features, the surface-to-surface locking engagement between the post locking feature and the receiver locking feature being no more than twenty percent of the overall surface-to-surface contact between the lower end of the post and the receiver of the base.

An active seating apparatus having a seat, a post configured for selectively engaging and supporting the seat and having a lower end opposite the upper end and seat formed with a post locking feature, and a base having an upper wall and an upwardly-opening receiver formed in the upper wall configured for selective removable receipt of the lower end of the post, the receiver having a receiver locking feature configured for selective locking engagement with the post locking feature upon insertion of the post within the base in selectively and securely assembling the post on the base through engagement of the post and receiver locking features, the surface-to-surface locking engagement between the post locking feature and the receiver locking feature being no more than twenty percent of the overall surface-to-surface contact between the lower end of the post and the receiver of the base.

An adjustable desking system for supporting users in a plurality of ergonomic positions, the system comprising a plurality of sit-stand desks, each desk including a variable length leg assembly including an activator and a height adjustable worktop supported at a top end of the leg assembly and a master controller linked to each of the activators at the plurality of desks to control activation of each activator to raise and lower a worktop associated with the specific activator, wherein, the master controller controls worktop heights at each of the desks independent of user input when the desk is vacant and enables user control of the height of any worktop at a desk that is occupied by a user.

An elastic seesaw-type tilting mechanism is provided, including: a base support, configured to be connected with a chair base through a chair column; a seat support, being pivotably mounted on the base support and configured to be connected with a seat; a backrest support, being pivotably mounted on the base support and configured to be connected with a backrest; a first elastic mechanism, being connected with the seat support and the backrest support to form an elastic seesaw mechanism; a second elastic mechanism, being connected with the base support and the seat support, the second elastic mechanism and the first elastic mechanism being respectively biased against the seat support in opposite directions. A swivel chair is further provided, including: one of the elastic seesaw-type tilting mechanism as described above, a seat, a backrest, a chair column and a chair base.