A wood chipper includes an engine and a chipper structure (e.g., a chipper disc or a chipper drum). A drive assembly is disposed between the engine and the chipper structure. The drive assembly comprises at least one pulley. The at least one pulley defines a cylindrical recess therein. A drum brake assembly is configured to engage the cylindrical recess of the at least one pulley.

A wood chipper includes an engine and a chipper structure (e.g., a chipper disc or a chipper drum). A drive assembly is disposed between the engine and the chipper structure. The drive assembly comprises at least one pulley. The at least one pulley defines a cylindrical recess therein. A drum brake assembly is configured to engage the cylindrical recess of the at least one pulley.

Disclosed herein is an electronic brake apparatus that includes a spring pack, a first piston in which the spring pack is mounted, a bolt screw rotated in conjunction with a motor and having one end in point contact with the spring pack, a fixing member configured to bind the bolt screw to the first piston, and a second piston screwed to the other end of the bolt screw.

A drum brake for an electrical motor vehicle brake system wherein actuator means, a transmission means and a spreading device are in a force flow with movably mounted drum brake shoes that are suitable and designed to cooperate with a brake drum. The force flow, in a electromechanically actuatable drum brake such that closed-loop electrical brake control in conjunction with simple actuator control is made possible with reduced outlay over the entire wearing service life of the brake shoe. Transverse offset compensation is provided by way of, a joint-disk-type/joint-socket-type bearing geometry such that a friction lining bearing support geometry with profiling allowing mutual articulation such that transversely oriented lining displacement with respect to the a direction is at least reduced.

A stump cutter includes an engine and a cutting wheel. A drive assembly is disposed between the engine and the cutting wheel. The drive assembly comprises at least one pulley. The at least one pulley defines a cylindrical recess therein. A drum brake assembly is configured to engage the cylindrical recess of the at least one pulley.

An electric actuator assembly for a drum brake assembly having a brake drum includes a housing and a gear nut configured for rotation by a motor and provided in the housing. A pin extends longitudinally within the housing and is associated with a first clevis for receiving a first brake shoe. A spindle extends longitudinally within the housing and is aligned with the pin. The spindle has a first threaded connection with a second clevis for receiving a second brake shoe and a second threaded connection with the gear nut. The distance between the first clevis and the second clevis increases in response to rotation of the gear nut to move the brake shoes towards the drake drum. The second clevis is urged towards the first clevis in response to cooling of the brake drum in order to back drive the spindle and gear nut and thereby reduce the distance between the first clevis and second clevis.

An electric actuator assembly for a drum brake assembly having a brake drum includes a housing and a gear nut configured for rotation by a motor and provided in the housing. A pin extends longitudinally within the housing and is associated with a first clevis for receiving a first brake shoe. A spindle extends longitudinally within the housing and is aligned with the pin. The spindle has a first threaded connection with a second clevis for receiving a second brake shoe and a second threaded connection with the gear nut. The distance between the first clevis and the second clevis increases in response to rotation of the gear nut to move the brake shoes towards the drake drum. The second clevis is urged towards the first clevis in response to cooling of the brake drum in order to back drive the spindle and gear nut and thereby reduce the distance between the first clevis and second clevis.

An actuator for use in a drum-in-hat parking brake includes a wedge. A pair of tappets oppositely disposed from each other such that a tappet is positioned adjacent opposite sides of the wedge is included and a bearing is positioned between the wedge and an adjacent tappet. The bearing rolls along and between the wedge and the adjacent tappet and forces the pair of tappets apart from each other when the wedge moves relative to the pair of tappets. Movement of the pair of tappets away from each is used to force a pair of brake shoes into contact with a brake drum and provide a desired braking force on a brake drum.

An actuator for use in a drum-in-hat parking brake includes a wedge. A pair of tappets oppositely disposed from each other such that a tappet is positioned adjacent opposite sides of the wedge is included and a bearing is positioned between the wedge and an adjacent tappet. The bearing rolls along and between the wedge and the adjacent tappet and forces the pair of tappets apart from each other when the wedge moves relative to the pair of tappets. Movement of the pair of tappets away from each is used to force a pair of brake shoes into contact with a brake drum and provide a desired braking force on a brake drum.

An actuator for use in a drum-in-hat parking brake includes a wedge. A pair of tappets oppositely disposed from each other such that a tappet is positioned adjacent opposite sides of the wedge is included and a bearing is positioned between the wedge and an adjacent tappet. The bearing rolls along and between the wedge and the adjacent tappet and forces the pair of tappets apart from each other when the wedge moves relative to the pair of tappets. Movement of the pair of tappets away from each is used to force a pair of brake shoes into contact with a brake drum and provide a desired braking force on a brake drum.