Abstract: A chair has a rocking mechanism with a fixed base support having a conical receptacle to be placed on a chair pillar. The base support is pivotally connected to a mechanism upper part which forms a housing at least partially enclosing the base support. A pivot axis of the mechanism upper part runs transversely to the chair longitudinal direction and is arranged next to the conical receptacle, as seen in the chair longitudinal direction. A spring element acts between the mechanism upper part and the base support for returning the mechanism upper part from a pivoted position into a starting position. The rocking mechanism is fastened via the mechanism upper part to a seat, a seat support, or a frame of the chair, or else, the rocking mechanism is integrated so that part of the seat, seat support or chair frame forms the mechanism upper part.

Abstract: The invention relates to a seat for a vehicle, in particular for all-terrain vehicles, with at least one seat area extending in the longitudinal direction (X) of the vehicle and in the width-wise direction (Y) of the vehicle for receiving a person, a backrest for supporting the back of the person and a holding device connected in the vertical direction (Z) under the seat area and to the latter for keeping the seat area at a distance from a coupling region for coupling the seat to the vehicle, wherein the holding device has at least one spring device for the movable arrangement at least for a time of at least the seat area with respect to the coupling region in the longitudinal direction (X) of the vehicle and/or in the width-wise direction (Y) of the vehicle.

Abstract: An automatically adjustable chair structure essentially includes a chair body, a base, an extension bar, at least one first cushion mechanism, and at least one second cushion mechanism. When a user sits on the chair body, the user's body weight is cushioned by the first and second cushion mechanisms. In addition, the two sled runner-shaped supports lying on the floor and the pivotable design of the extension bar allow the extension bar to move backward. Thus, the tilt angle of the chair body can be automatically changed to suit the user's sitting posture.

Abstract: A height adjustment mechanism is disclosed that includes a pedestal height variability mechanism. The pedestal height variability mechanism includes a first member and a biasing mechanism. The biasing mechanism is configured to hold the first member in a first position. The first member has a first end and a second end opposite the first end. The biasing mechanism has a first portion attached to the first member adjacent the first end of the first member. The biasing mechanism also has a second portion attached to the first member adjacent to the second end of the first member. Preferably, a second member is also provided that is moveably attached to the first member. The second member may be configured such that movement of the second member actuates height adjustment of a chair.

Abstract: A seat comprising a seat pan (12) and a support structure, wherein the seat pan (12) is pivotally coupled to the support structure (8) about a first pivot axis (pi) provided across substantially the front of the seat pan (12), such that the seat pan (12) may be pivoted about the said first pivot axis (pi) in use, and the angle of the seat pan (12) relative to the support structure (18) may thus be adjusted. The seat further comprises a backrest (14), the backrest being coupled (p2) to substantially the rear of the seat pan (p12). Also provided is pneumatic apparatus for use with a seat, comprising one or more inflatable cushions for supporting a user in use.

Abstract: A vehicle seat stabilization system configured for minimizing downward displacement of a seat cushion upon vehicle impact includes a vehicle seat and a stabilization device. The seat has a first and second vertical position and includes the cushion, a torque tube, mounting arrangement, slide assembly, and lift linkage. The device is configured for minimizing downward displacement of the cushion upon vehicle impact and includes a piston, rod, first cylinder, and a second cylinder disposed entirely within and cooperating with the first cylinder to define a conduit. The piston divides the second cylinder and defines a first and second chamber in fluid communication via the conduit. The device includes fluid and a member disposed within the second cylinder moveable upon vehicle impact to seal off fluid communication between the conduit and the second chamber to minimize downward displacement of the cushion upon impact when the seat is in the second position.

Abstract: A work station chair (10) is enabled to shift in response to a person leaning forward in the chair (10) when in a working mode and leaning back in a rest position. The chair includes a seat (18), a backrest (24) and supportive structure. The seat (18) is resiliently supported on the supportive structure (22) and moveably along an arc track (30) which is mounted on the supportive structure and has a radius generated from the ankle of the person sitting on the chair. The backrest (20) is resiliently supported on the seat (18) and moveable along an arc track (64) which is mounted to the seat (18) and has a radius generated from H-point that is a natural pivot point of the torso and thigh lines of the person. The chair (10) provides a combined tilting movement of the person's body about the ankle point and the H-point when the person shifts his or her gravity to reduce adverse static postural loads and forces which are responsible for the fatigue and biomechanical dysfunction.

Abstract: A chair control mechanism has a rotatable shaft with a radially extending member abutting an actuating finger of a gas control cylinder. A slider may push a second radially extending member of the rotatable shaft in order to rotate the shaft. The slider has a tab extending into the mouth of the head of a further shaft which is rotated by a user operated handle. Thus, when the user operates the handle, the head of the further shaft causes the slider to slide.

Abstract: Work chair, comprising a seat, supported in a height-adjustable manner by a column on a foot, and an adjustable backrest, the seat, at least in part, having a substantially horizontal position, and the backrest promoting an upright position of the user's back, characterized in that the column (3) is composed of three parts (4, 5, 6) and as a result provides a two-stage adjustability for the seat height, in that the seat is divided into two parts (7, 8), in such a manner that a rear section (7) is fixed and always retains the substantially horizontal position, while a front section (8) is hinged with respect to the rear section, and in that the front section (8) is secured to the column (3) in a hinged manner (11) by a rod (9) secured to it in a hinged manner (10). The chair can be dimensioned in such a way that it allows an ergonomic working position to be adopted by virtually all users, irrespective of their corporal size, with the possibility of increasing the size of the workstation.

Abstract: A reclining chair system with a standard assembly supporting seat and backrest assemblies, which are pivotally mounted to each other and capable of providing a rocker effect to a user. A strut assembly provides substantially a bounce free shock absorbing function by using two coaxially disposed compressible and resilient members that are compressed sequentially. A headed shaft with a step limits the compression of the first member. The arrangement permits a volumetrically efficient operation while preventing excessive fatigue of the member. An adjustment mechanism permits a user to readily set the relative angular position of backrest and seat with respect to the standard (and consequently the horizontal plane) depending on the location of the chair system.

Abstract: A chair 1 allowing a person sitting thereon to move a part of the person's body above the waist which corresponds to the backrest of the chair is provided having a backrest portion located behind a seat portion, the backrest portion being divided into backrest upper frames 55 and backrest lower frames 50, wherein a first state which allows the whole backrest frame 5 to incline rearwardly and a second state which allows the backrest upper frames 55 to incline rearwardly relative to the backrest lower frames 50 are assumed, the first state and the second state being switchable to each other.

Abstract: A spring unit (11) for the weight setting of a chair (1), in particular an office chair, having a gas spring (12) and having a number of further spring elements (17, 18, 19; 27, 28) which can be connected up to the gas spring (12) individually or in combination. The spring unit (11) is expediently arranged between a seat carrier (7) connected to a rotary column (8) of the chair (1), and the seat (3), or a backrest link (4) which extends at least approximately parallel to said seat (3) and belongs to a backrest (2).

Abstract: This patent relates to ergonomically correct seating during long periods of time, especially for professionals who work with hands extended like dentists and hand surgeons, but also computer users and other office or assembly workers. While the immediate comfort is provided by the shape of the seat and the backrest and by the upholstery, the long time comfort is determined by proper sitting posture. Comfortable sitting posture is individual and requires a large range of adjustments for height, seat inclination and the positioning of the back support relative to the seat. Recognizing the importance of these adjustments—not only for comfort but also for avoiding back problems—this adjustment mechanism is designed to accomplish all three adjustments with a single lever. The mechanism is designed for use with the lever mounted on the right side or the left side of the chair to accommodate personal preferences.

Abstract: A chair height control mechanism has a gas cylinder with a valve control finger extending from an upper end overlain by a tilting actuator. A resilient pad is adhered to the upper end of the gas cylinder surrounding the valve control finger and maintains a spacing between the valve control finger and actuator when the actuator is not in use to avoid rattle.