Abstract: A control mechanism for a chair comprises a baseplate configured to be coupled to a chair base assembly, a support plate configured to be coupled to a chair seat, and an elastic element arranged between the base plate and the support plate. The elastic element enables the support plate to be tilted with respect to the base plate around a first tilt axis and a second tilt axis different from the first tilt axis. The control mechanism further comprises a control handle configured to be actuated in an actuating direction, and at least one stop element. Each stop element is arranged between the base plate and the support plate and configured to limit a minimum distance between the base plate and the support plate at the position of the corresponding stop element. A stop element adjust mechanism is coupled to the control handle and configured to adjust the minimum distance of each stop element in response to actuating the control handle in the actuating direction.

Abstract: A control mechanism (20) for a chair (100) comprises a baseplate (21) configured to be coupled to a chair base assembly (102), a support plate (22) configured to be coupled to a chair seat (103), and an elastic element (23) arranged between the base plate (21) and the support plate (22). The elastic element (23) enables the support plate (22) to be tilted with respect to the base plate (21) around a first tilt axis and a second tilt axis different from the first tilt axis. The control mechanism (20) further comprises a control handle (24) configured to be actuated in an actuating direction (34), and at least one stop element (26A-26D). Each stop element is arranged between the base plate (21) and the support plate (22) and configured to limit a minimum distance between the base plate (21) and the support plate (22) at the position of the corresponding stop element (26A-26D).

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 in which a synchronized mechanism, fixed on a telescopic post of a base, supports and renders interdependent rigid elements and which, define respectively the backrest and the seat of the chair and are mutually hinged at a first point, i.e. along a horizontal axis perpendicular to the longitudinal centerline plane of the seating space, which is entirely defined by a single curved line obtained by joining the rigid elements and which are adapted for this purpose.

Abstract: A chair in which a synchronized mechanism, fixed on a telescopic post of a base, supports and renders interdependent rigid elements and which, define respectively the backrest and the seat of the chair and are mutually hinged at a first point, i.e. along a horizontal axis perpendicular to the longitudinal centerline plane of the seating space, which is entirely defined by a single curved line obtained by joining the rigid elements and which are adapted for this purpose.

Abstract: A tilt mechanism for a weight-responsive seating furniture comprises a backrest support, a first lever and a second lever. The backrest support is configured for coupling to a backrest and is pivotably mounted. The first lever has a mount structure for coupling the first lever to a seat. The first lever is pivotably mounted at a first pivot axis. The second lever is pivotably attached to the backrest support at a second pivot axis and is coupled to the first lever by a coupling mechanism to pivot the first lever about the first pivot axis when the backrest support pivots relative to the carrier.

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 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 weight-responsive seating furniture comprises a backrest support, a first lever and a second lever. The backrest support is configured for coupling to a backrest and is pivotably mounted. The first lever has a mount structure for coupling the first lever to a seat. The first lever is pivotably mounted at a first pivot axis. The second lever is pivotably attached to the backrest support at a second pivot axis and is coupled to the first lever by a coupling mechanism to pivot the first lever about the first pivot axis when the backrest support pivots relative to the carrier.

Abstract: A tension adjust device (20) for a chair comprises a carrier member (21), an actuation member (22), a ratchet mechanism and a disengagement mechanism. The actuation member (22) is rotatable in a first direction and in a second direction opposite to the first direction and is coupled to the carrier member (21) to rotate the carrier member (21). The ratchet mechanism (31-33) is coupled between the actuation member (22) and the carrier member (21) and comprises a locking pawl (31) and a profile (32) having a plurality of recesses for engagement with the locking pawl (31). The disengagement mechanism is configured to maintain the ratchet mechanism (31-33) in a disengaged state when the actuation member (22) rotates the carrier member (21) in the second direction. The locking pawl (31) remains disengaged from the recesses of the profile (32) while the ratchet mechanism (31-33) is in the disengaged state.

Abstract: A tilt mechanism (10) for a chair comprises a base (11), a back bracket (12) configured to support a chair back (4) and a coupling arrangement (16, 25) configured to couple the back bracket (12) to the base (11). The coupling arrangement comprises a guide track (25) and a guide member (16). One of the guide track (25) and the guide member (16) is provided on a portion of the back bracket (12) extending from a back attaching portion (23) to a pivot coupling portion (24) at which the back bracket (12) may be articulated to a chair seat (3). The other one of the guide track (25) and the guide member (16) is provided on the base (11). When the coupling arrangement (16, 25) couples the back bracket (12) to the base (11), pivoting the back bracket (12) about the pivot coupling portion (24) causes the guide member (16) and the guide track (25) to be displaced relative to each other, effecting a displacement of the pivot coupling portion (24) relative to the base (11).

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 tension adjust device (20) for a chair comprises a carrier member (21), an actuation member (22), a ratchet mechanism and a disengagement mechanism. The actuation member (22) is rotatable in a first direction and in a second direction opposite to the first direction and is coupled to the carrier member (21) to rotate the carrier member (21). The ratchet mechanism (31-33) is coupled between the actuation member (22) and the carrier member (21) and comprises a locking pawl (31) and a profile (32) having a plurality of recesses for engagement with the locking pawl (31). The disengagement mechanism is configured to maintain the ratchet mechanism (31-33) in a disengaged state when the actuation member (22) rotates the carrier member (21) in the second direction. The locking pawl (31) remains disengaged from the recesses of the profile (32) while the ratchet mechanism (31-33) is in the disengaged state.

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 chair-specific adjustment device is provided. The device includes a seat support and a base support linked to a gas column on which there is a rotating user-controlled handle. The handle controls the selection of the adjustment device's angular position as well as a safety limit clutch. The rotation of the handle generates traction of a tensional element that moves a limit switch. The limit switch runs transversely to the seat support and is shaped with steps that selectively interact with a limit appendage linked to the base support. The device includes a torsion bar that elastically limits the movement of the base support. As such, the device provides quick and easy adjustment of the backrest extension into various positions.

Abstract: A tilt mechanism (10) for a chair comprises a base (11), a back bracket (12) configured to support a chair back (4) and a coupling arrangement (16, 25) configured to couple the back bracket (12) to the base (11). The coupling arrangement comprises a guide track (25) and a guide member (16). One of the guide track (25) and the guide member (16) is provided on a portion of the back bracket (12) extending from a back attaching portion (23) to a pivot coupling portion (24) at which the back bracket (12) may be articulated to a chair seat (3). The other one of the guide track (25) and the guide member (16) is provided on the base (11). When the coupling arrangement (16, 25) couples the back bracket (12) to the base (11), pivoting the back bracket (12) about the pivot coupling portion (24) causes the guide member (16) and the guide track (25) to be displaced relative to each other, effecting a displacement of the pivot coupling portion (24) relative to the base (11).

Abstract: This invention is directed to a two-position, at rest, seat angle adjustment assembly that locks the seat in two distinct positions. In a first position, the seat is generally horizontal, while in a second position, the seat is inclined at an angle relative to horizontal. The assembly includes left and right adjustment mechanisms, a rod, and a lever. The left and right adjustment mechanisms are mounted to the seat and the back assembly on each side thereof. Each of the mechanisms includes a housing, and a cam. The cam is received in the housing and the rod is fixably received within the cam. The lever is attached to the rod proximate the right adjustment mechanism. The lever is utilized to rotate the cams within their respective housings thereby moving the seat with respect to the back assembly.