Abstract: A motion mechanism for a chair effects a coordinated movement of a chair seat and chair back. The motion mechanism comprises a mechanism configured to support the chair seat and to couple the chair seat to a chair base assembly, a first back support configured to couple the chair back to the mechanism, and a second back support configured to couple the chair back to the mechanism. A first end of the first back support and a first end of the second back support are coupled via rotary connections to the mechanism. A second end of the first back support and a second end of the second back support are configured for coupling to the chair back. An axis of rotation of the first rotary connection extends in a front-rear direction of the chair and an axis of rotation of the second rotary connection extends in the front-rear direction.

Abstract: A tilt mechanism for a chair comprises a base, a first support configured to support a chair seat and mounted to the base, a second support configured to support a chair back and pivotably coupled to the base about the first pivot axis, a link element pivotably coupled to the second support about a second pivot axis, and a shaft attached to the first support. A first guide slot is provided at the base and a second guide slot is provided at the link element. The shaft is supported in the first guide slot and the second guide slot.

Abstract: A tilt mechanism for a chair comprises a base, a first support configured to support a chair seat and mounted to the base, a second support configured to support a chair back and pivotably coupled to the base about the first pivot axis, a link element pivotably coupled to the second support about a second pivot axis, and a shaft attached to the first support. A first guide slot is provided at the base and a second guide slot is provided at the link element. The shaft is supported in the first guide slot and the second guide slot.

Abstract: A chair back height adjustment mechanism comprises a guide having an abutment surface at a lateral side of the guide which extends along an adjustment direction. The chair back height adjustment mechanism comprises an adjusting device supported on the guide so as to be displaceable along the adjustment direction. The adjusting device comprises a carrier, a coupling member which is moveably supported on the carrier, and a bias mechanism. The coupling member has a contact face shaped to abut on the abutment surface of the guide and a slanted face. The bias mechanism is operative to apply a force onto the slanted face to urge the contact face of the coupling member against the abutment surface of the guide.

Abstract: A tilt mechanism for a chair comprises a base, a first support configured to support a chair seat and a second support configured to support a chair back, the second support is pivotably coupled to the base. A coupling mechanism couples the second support to both the base and the first support. The coupling mechanism comprises a pin attached to the first support, a first linear guide slot provided on the base, and a second linear guide slot provided on the second support. The pin is slideably received in both the first linear guide slot and the second linear guide slot. The second linear guide slot slopes upwardly in a forward direction of the tilt mechanism when the tilt mechanism is in a zero-tilt position.

Abstract: A tilt mechanism is configured for adjustment of a tension applied by a chair back. The tilt mechanism includes a base, a back bracket tiltably supported on the base, and a rocker coupled to the back bracket so as to be moveable relative to the back bracket. The rocker has a pivot axis and pivots about the pivot axis when the back bracket tilts relative to the base. An energy storage mechanism is coupled to the rocker to exert a force onto a portion of the rocker. An actuating mechanism is coupled to at least one of the rocker or the energy storage mechanism and is configured to alter a distance between the pivot axis and the portion of the rocker at which the force is exerted onto the rocker, thereby altering a length of a lever arm.

Abstract: A tilt mechanism (10) for a chair comprises a base (11), a first support (12) configured to support a chair seat and a second support (13) configured to support a chair back. The second support (13) is pivotably coupled to the base (11). A first coupling mechanism (41) couples the first support (12) with the base (11) and includes a first pin (40) slideably supported in a first linear guide slot (20). A second coupling mechanism (42) couples the second support (13) with the first support (12) and includes a second pin (44) slideably supported in a second linear guide slot (36). When the second support (13) pivots relative to the base (11), the first pin (40) is caused to be displaced along the first linear guide slot (20) and the second pin (44) is caused to be displaced along the second linear guide slot (36).

Abstract: A tilt mechanism for a chair comprises a base, a first support configured to support a chair seat and a second support configured to support a chair back, the second support is pivotably coupled to the base. A coupling mechanism couples the second support to both the base and the first support. The coupling mechanism comprises a pin attached to the first support, a first linear guide slot provided on the base, and a second linear guide slot provided on the second support. The pin is slideably received in both the first linear guide slot and the second linear guide slot. The second linear guide slot slopes upwardly in a forward direction of the tilt mechanism when the tilt mechanism is in a zero-tilt position.

Abstract: A chair back height adjustment mechanism comprises a guide having an abutment surface at a lateral side of the guide which extends along an adjustment direction. The chair back height adjustment mechanism comprises an adjusting device supported on the guide so as to be displaceable along the adjustment direction. The adjusting device comprises a carrier, a coupling member which is moveably supported on the carrier, and a bias mechanism. The coupling member has a contact face shaped to abut on the abutment surface of the guide and a slanted face. The bias mechanism is operative to apply a force onto the slanted face to urge the contact face of the coupling member against the abutment surface of the guide.

Abstract: A tilt mechanism is configured for adjustment of a tension applied by a chair back. The tilt mechanism includes a base, a back bracket tiltably supported on the base, and a rocker coupled to the back bracket so as to be moveable relative to the back bracket. The rocker has a pivot axis and pivots about the pivot axis when the back bracket tilts relative to the base. An energy storage mechanism is coupled to the rocker to exert a force onto a portion of the rocker. An actuating mechanism is coupled to at least one of the rocker or the energy storage mechanism and is configured to alter a distance between the pivot axis and the portion of the rocker at which the force is exerted onto the rocker, thereby altering a length of a lever arm.

Abstract: A tilt mechanism (10) for a chair comprises a base (11), a first support (12) configured to support a chair seat and a second support (13) configured to support a chair back. The second support (13) is pivotably coupled to the base (11). A first coupling mechanism (41) couples the first support (12) with the base (11) and includes a first pin (40) slideably supported in a first linear guide slot (20). A second coupling mechanism (42) couples the second support (13) with the first support (12) and includes a second pin (44) slideably supported in a second linear guide slot (36). When the second support (13) pivots relative to the base (11), the first pin (40) is caused to be displaced along the first linear guide slot (20) and the second pin (44) is caused to be displaced along the second linear guide slot (36).

Abstract: A tilting device for a reclining chair including a support base that can be affixed to at least one pedestal, a mounting body for the back of a seat which is articulated on said support base rotatably around a first axis essentially orthogonal to said pedestal, a mounting plate for the seat of said surface of said seat which has its front end and back end rotatably articulated around a respective hinge axis generally parallel to said first axis respectively to said support base and to said mounting body, elastic means of thrust acting along a direction generally orthogonal to said first axis and having a first end acting on said support base and a second end acting on said mounting body and blocking means of said mounting body in at least two different angles relative to said support base and acting in opposition to said elastic means of thrust, said mounting plate assuming two corresponding different angles.

Abstract: Adjustment device for chairs, comprising a back support capable of rotating around a shaft fastened to a support base, said support for the backrest being provided with a blocking plate having a plurality of openings, an insert capable of limited movement in a defined track in the support base to engage and disengage said openings, and an actuator connected to said insert, in which the actuator is operated by a rod connected to a handle that can be operated by the user, said actuator being movable between a release position and a lock position, in which said insert is selectively engaged in one of said openings.

Abstract: Adjustment device for chairs, comprising a back support capable of rotating around a shaft fastened to a support base, said support for the backrest being provided with a blocking plate provided with a plurality of openings, an insert being movable to engage and disengage said openings, and being provided with means to limit the travel of the insert capable of sliding in a defined track in the support base, and actuator being provided, operated by a rod connected to a handle that can be operated by the user, said actuator being movable by a release position to a lock position and vice-versa, in which said insert is selectively engaged in one of said openings, said actuator being connected to said insert.

Abstract: A tilting device for a reclining chair including a support base that can be affixed to at least one pedestal, a mounting body for the back of a seat which is articulated on said support base rotatably around a first axis essentially orthogonal to said pedestal, a mounting plate for the seat of said surface of said seat which has its front end and back end rotatably articulated around a respective hinge axis generally parallel to said first axis respectively to said support base and to said mounting body, elastic means of thrust acting along a direction generally orthogonal to said first axis and having a first end acting on said support base and a second end acting on said mounting body and blocking means of said mounting body in at least two different angles relative to said support base and acting in opposition to said elastic means of thrust, said mounting plate assuming two corresponding different angles.