An example gas lift cylinder removal device described herein includes a collar assembly having a guide pin, a set screw, and a lead screw. The example cylinder removal device is disposed on a gas lift cylinder and provided proximate to and below a seat plate assembly of an example task chair. Operation of the gas lift cylinder removal tool from a first position to a second position provides a mechanical advantage to impart an upward force on a bushing of the seat plate assembly, thereby displacing the cylinder from the seat plate assembly. An example task chair having the gas lift cylinder removal tool is described herein comprising a support surface, a seat plate assembly, and a base assembly, the seat plate assembly including a bushing, an upper plate and a lower plate.

In a preferred embodiment, a tilt-recline force adjusting apparatus for an aircraft passenger seat configured for a tilt-recline positioning includes a first spring having a first axis to urge a seat back into an upright position, the first spring arranged to compress as the seat is manually reclined, a helper spring having a second axis parallel to the first axis, the helper spring arranged to assist or counteract the first spring, an adjustment mechanism coupled to the helper spring to increase or decrease a force exerted by the helper spring to assist or counteract the first spring, and a weight sensing mechanism coupled to the adjustment mechanism and operable to actuate the adjustment mechanism in direct proportion to a weight of a seated passenger, whereby the force exerted on the aircraft seat to urge the seat back into an upright position is greater for a heavier seated passenger.

A seating furniture includes a seat device and a backrest device connected via at least one first rotatable coupling in respective coupling portions (P) of the backrest device and at rear portion (B) of the seat device. A base supports the seat device and the backrest device. The backrest device comprises a portion extending in a direction towards the base and past the first rotatable coupling, and the portion is rotatably coupled to and supported on the base via at least one respective link arm. The seat device is rotatably coupled to and supported on the base via a second rotatable coupling attached closer to front end (F) of the seat device than the first rotatable coupling. A lockable control device controls the movements between the backrest device and the seat device. The construction is well-balanced, and low forces are required to adjust the chair in all positions.

In a preferred embodiment, a tilt-recline force adjusting apparatus for an aircraft passenger seat configured for a tilt-recline positioning includes a first spring having a first axis to urge a seat back into an upright position, the first spring arranged to compress as the seat is manually reclined, a helper spring having a second axis parallel to the first axis, the helper spring arranged to assist or counteract the first spring, an adjustment mechanism coupled to the helper spring to increase or decrease a force exerted by the helper spring to assist or counteract the first spring, and a weight sensing mechanism coupled to the adjustment mechanism and operable to actuate the adjustment mechanism in direct proportion to a weight of a seated passenger, whereby the force exerted on the aircraft seat to urge the seat back into an upright position is greater for a heavier seated passenger

An adjustment device for a chair with an oscillating mechanism having a first plate, connected to a central gas-operated post for height adjustment of a seat, to which a second plate, fixed to a backrest, is articulated so that the second plate can oscillate by means of a first pivot, wherein a third plate is articulated and interposed, respectively by means of a second pivot and a third pivot, between said first plate and said second plate, and is configured to be connected to said seat, said first plate having means for connection to at least one slat or leaf spring which is adapted to contrast to an inclination of said second plate with respect to said first plate.

A passenger seat is disclosed. The passenger seat may include a means for guiding a seat pan of the passenger seat forward as the seat pan moves from an upright sitting position to a recline sitting position. A passenger seat may include a pivot attachment coupled to the seat pan and a seat back of the passenger seat, wherein the pivot attachment enables a lumbar region of the seat back to move forward and lower when the seat pan moves from the upright sitting position to the recline sitting position. A passenger seat may include a means for guiding the lumbar region of the seat back. A passenger seat may include a spring coupled to the seat back and a frame component of the passenger seat, wherein the spring biases the passenger seat from the recline sitting position to the upright sitting position.

An example gas lift cylinder removal device described herein includes a collar assembly having a guide pin, a set screw, and a lead screw. The example cylinder removal device is disposed on a gas lift cylinder and provided proximate to and below a seat plate assembly of an example task chair. Operation of the gas lift cylinder removal tool from a first position to a second position provides a mechanical advantage to impart an upward force on a bushing of the seat plate assembly, thereby displacing the cylinder from the seat plate assembly. An example task chair having the gas lift cylinder removal tool is described herein comprising a support surface, a seat plate assembly, and a base assembly, the seat plate assembly including a bushing, an upper plate and a lower plate.

An office chair comprises a seat, a seatback, and a chair base with a central support on which a rocking mechanism comprising a supporting base is installed. A seatback frame comprises a transverse curved plate to which a preferably elastic vertical plate is attached by means of a pivotal connection in such a way that an axis of the pivotal connection is at about the middle of the seatback height. On its other end, the vertical plate is connected to a seatback base which in turn is connected to the supporting base. The seat is fixed to the rocking mechanism. Placed between the transverse plate and the upper part of the seatback is a gas-lift unit. Positioned on the vertical plate is an element for adjusting the initial position of the seatback. The chair can turn its seatback providing comfort for the user while taking various sitting positions.

The present shock absorbing structure of an ATV seat for an ATV with a vehicle frame and a seat frame, comprising an elastic support member provided between the seat frame and the vehicle frame, the elastic support member supporting the seat frame and allowing the seat frame to move downward and compress the elastic support member when subjected to an external force. The shock absorbing structure further comprises at least one shock absorber block provided between the seat frame and the vehicle frame, the at least one shock absorber block being either attached to the seat frame and having a gap in an up-and-down direction from the vehicle frame, or attached to the vehicle frame and having a gap in the up-and-down direction from the seat frame. The present shock absorbing structure of an ATV seat provides overall enhanced comfort.