Abstract: A pivot mechanism includes a pivot arm (14) that is rotatably mounted on a base member (1) via a pivot pin (16). The pivot mechanism includes a locking mechanism comprising a convex tooth segment (36) provided on the pivot arm and a locking member (38) having a concave tooth segment (40). The locking member (38) is mounted on the base member (1) for movement between a locked position in which the convex and concave tooth segments arc engaged preventing rotation of the pivot arm (14), and an unlocked position in which the tooth segments disengaged. The center of curvature of the convex tooth segment (36) is offset from the center of curvature of the concave tooth segment (40) whereby, in normal usage, the convex and concave tooth segment a only partially engaged when the locking member is in the locked position.

Abstract: A pivot mechanism includes a pivot arm (14) that is rotatably mounted on a base member (1) via a pivot pin (16). The pivot mechanism includes a locking mechanism comprising a convex tooth segment (36) provided on the pivot arm and a locking member (38) having a concave tooth segment (40). The locking member (38) is mounted on the base member (1) for movement between a locked position in which the convex and concave tooth segments are engaged preventing rotation of the pivot arm (14), and an unlocked position in which the tooth segments are disengaged. The center of curvature of the convex tooth segment (36) is offset from the center of curvature of the concave tooth segment (40) whereby, in normal usage, the convex and concave tooth segments are only partially engaged when the locking member is in the locked position.

Abstract: A pivot mechanism includes a pivot arm (14) that is rotatably mounted on a base member (1) via a pivot pin (16). The pivot mechanism includes a locking mechanism comprising a convex tooth segment (36) provided on the pivot arm and a locking member (38) having a concave tooth segment (40). The locking member (38) is mounted on the base member (1) for movement between a locked position in which the convex and concave tooth segments are engaged preventing rotation of the pivot arm (14), and an unlocked position in which the tooth segments are disengaged. The centre of curvature of the convex tooth segment (36) is offset from the centre of curvature of the concave tooth segment (40) whereby, in normal usage, the convex and concave tooth segments are only partially engaged when the locking member is in the locked position.

Abstract: A pivot mechanism includes a pivot arm (14) that is rotatably mounted on a base member (1) via a pivot pin (16). The pivot mechanism includes a locking mechanism comprising a convex tooth segment (36) provided on the pivot arm and a locking member (38) having a concave tooth segment (40). The locking member (38) is mounted on the base member (1) for movement between a locked position in which the convex and concave tooth segments are engaged preventing rotation of the pivot arm (14), and an unlocked position in which the tooth segments are disengaged. The center of curvature of the convex tooth segment (36) is offset from the center of curvature of the concave tooth segment (40) whereby, in normal usage, the convex and concave tooth segments are only partially engaged when the locking member is in the locked position.

Abstract: A pivot mechanism includes a pivot arm (14) that is rotatably mounted on a base member (1) via a pivot pin (16). The pivot mechanism includes a locking mechanism comprising a convex tooth segment (36) provided on the pivot arm and a locking member (38) having a concave tooth segment (40). The locking member (38) is mounted on the base member (1) for movement between a locked position in which the convex and concave tooth segments arc engaged preventing rotation of the pivot arm (14), and an unlocked position in which the tooth segments disengaged. The center of curvature of the convex tooth segment (36) is offset from the center of curvature of the concave tooth segment (40) whereby, in normal usage, the convex and concave tooth segment a only partially engaged when the locking member is in the locked position.

Abstract: A pivot mechanism, in particular for use in a recliner mechanism for a vehicle seat, includes a pivot arm (14) for attachment to the seat back (or “squab”), a base portion (4) for attachment to the seat base, and a locking member (38) mounted on the base portion for movement relative thereto. The locking member (38) and the pivot am (14) have mutually engageable locking formations (36, 40). When the locking formations (36, 40) are engaged, movement of the pivot arm relative to the base portion is prevented.

Abstract: An angular adjustment mechanism for adjusting the angular displacement of a seat back relative to a seat cushion has first and second internal toothed ring gears, the first and second ring gears being interconnected and adapted to be secured to the seat back, a third internally toothed ring gear being mounted intermediate of and rotatable relative to the first and second ring gears, said third ring gear being adapted to be secured to the seat cushion frame, the first, second and third ring gears being of the same diameter, the first and second ring gears having equal numbers of teeth and the third ring gear having a different number of teeth; a control gear being located axially within the first, second and third ring gears, and at least one planet gear being located in meshing engagement with the control gear and with the first, second and third ring gears, a tooth on each of the first and second ring gears being aligned with a tooth on the third ring gear at the point of meshing of the planet gear.