An adjustable friction brake assembly may adjust a variable amount of frictional force required to translate or rotate a shaft, rather than merely locking or unlocking the shaft. The brake assembly includes a housing for internally receiving the shaft, the external portion of the housing including external threading leading into circumferentially spaced fingers extending axially and oriented radially inward to engage the shaft. The brake assembly includes a rotatable adjuster having an internally threaded throughbore for engaging the housing and directing the fingers radially inward to engage the shaft, thereby increasing the required frictional force. For example, by rotating the adjuster clockwise, the required force can be increased; similarly, by rotating the adjuster counterclockwise, the required force can be decreased.

A bearing is described that has a first race on a lever side that is curved in a partially cylindrical manner. The bearing has a second race on a pressure piece side that is curved in a partially cylindrical manner. Rolling elements are present that roll on both the first and second races and are grouped together in a bearing cage. A radial projection, which is fixed in terms of rotation relative to the second race and forms a stop which limits the mobility of the bearing cage in one circumferential direction, is present. A pocket or opening, which is arranged in the first race or extends partially into the first race, is also present.

A disc brake (10) of the type including a pivoting lever having eccentric journals which act on a pair of tappets is disclosed. The tappets are adjusted in length by rotation, and each tappet has a tappet gear (22). A centrally located intermediate gear (24) is provided between the tappet gears to form a gear train, synchronizing the rotation of the two tappets and therefore ensuring that they remain the same length. The centrally located intermediate gear (24) includes a socket (26) for receiving a centrally located adjuster. The adjuster may be installed and removed from the disc brake through an aperture at the rear of the brake caliper, without any substantial disassembly of the brake and without de-synchronizing the tappets or even interrupting the gear train between the tappets.

This relates to an actuating unit, in particular for a drum brake, comprising a spacer element which can be fixed on a shoe unit or on a supporting unit, the spacer element having a holding section, via which it can be secured against movement along an activating axis relative to the shoe unit or the supporting unit, the spacer element having a first engagement section which is supported on the respective other one of the units comprising the shoe unit or the supporting unit in a first position of the spacer element, it being possible for the spacer element to be moved into a second position, in which the first engagement section is out of engagement with the shoe unit and the supporting unit, the spacer element spacing the shoe unit and the supporting unit further apart from one another in the first position than in the second position.

The proposal is for a bearing of a lever (1), which is provided with a pivot arm (1A), in relation to a pressure piece (7), having a race (45) on the lever side, said race being curved in a partially cylindrical manner, a race (35) on the pressure-piece side, said race being curved in a partially cylindrical manner, rolling elements (37), which roll on both races (45, 35) and are grouped together in a bearing cage (36), and having a radial projection (34), which is fixed in terms of rotation relative to one race (35) and forms a stop which limits the mobility of the bearing cage (36) in one circumferential direction. In order to refine the bearing in terms of assembly, the bearing comprises a pocket (50) or opening, which is arranged in the other race (45) or extends partially into said race, said pocket or opening extending only over a part of the race width and, at the transition to the curvature plane (E) of the race (45), forming a stop edge (52) which limits the mobility of the bearing cage (36) in the other circumferential direction.

A disc brake (10) of the type including a pivoting lever having eccentric journals which act on a pair of tappets is disclosed. The tappets are adjusted in length by rotation, and each tappet has a tappet gear (22). A centrally located intermediate gear (24) is provided between the tappet gears to form a gear train, synchronizing the rotation of the two tappets and therefore ensuring that they remain the same length. The centrally located intermediate gear (24) includes a socket (26) for receiving a centrally located adjuster. The adjuster may be installed and removed from the disc brake through an aperture at the rear of the brake caliper, without any substantial disassembly of the brake and without de-synchronizing the tappets or even interrupting the gear train between the tappets.

A self-operable centrifugally-activated brake system adapted for a wheeled device. The braking system includes a wheel having a hub, a rim, spokes extending between the hub and rim, and a rod extending between the hub and rim. A helical spring surrounds the rod, with a fixed end attached to the hub and a free end movable along the longitudinal direction of the rod. A brake mass structure is attached to the free end of the helical spring and includes a cylindrical pin structure. A main frame connects to the hub of the wheel. An extension structure extends from the main frame and includes a spacing segment and a hook segment having a groove configured to engage with the pin structure.