A tire chock having an at least partially threaded rod; a first trunnion having an aperture therethrough that receives the rod; first and second locking members, one locking member being rotatably fixed relative to the rod, the other locking member being rotatably fixed relative to the first trunnion. A tire chock may alternatively have an at least partially threaded rod; an upper trunnion rotatably attached to the rod; a lower trunnion threadedly attached to the rod, the lower trunnion translating axially relative to the rod upon rotation of the rod relative to the lower trunnion; a pair of linkage arms, the pair of linkage arms forming an X-shape, each linkage arm being connected to the lower trunnion by a drive arm and being connected to the upper trunnion by a support arm, wherein, as the rod is rotated relative to the lower trunnion, the linkage arms expand or contract.

In an aspect, a remote-controlled brake for a human-powered vehicle is provided and includes a support structure that is mountable to a frame of the vehicle, a shoe that is pivotable between a braking position and a non-braking position, a motor, and a local controller. In the braking position the shoe is abutted with a wheel of the vehicle to stop forward rolling of the wheel, while permitting backward rolling of the vehicle. In the non-braking position the shoe permits forward and backward rolling of the wheel. The motor is operatively connected to the shoe to move the shoe to and from both the braking and non-braking position. The local controller includes an electronic reception unit that is configured to receive signals from a remote controller, wherein the local controller is programmed to control operation of the motor based on the signals.

A brake control device for a brake system, wherein the brake system has at least one electromagnetic track brake device, which can be supplied with current at variable amperage according to the brake control device to create a braking force, and wherein the brake control device is designed to actuate the at least one electromagnetic track brake device at a cleaning amperage during travel in order to clean a rail. Also disclosed is a brake system having such a brake control device, a rail vehicle, and a method for cleaning a rail by means of an electromagnetic track brake device.

A brake control device for a brake system, wherein the brake system has at least one electromagnetic track brake device, which can be supplied with current at variable amperage according to the brake control device to create a braking force, and wherein the brake control device is designed to actuate the at least one electromagnetic track brake device at a cleaning amperage during travel in order to clean a rail. Also disclosed is a brake system having such a brake control device, a rail vehicle, and a method for cleaning a rail by means of an electromagnetic track brake device.

A rear brake unit for a cargo dolly includes a left and a right brake that each have a leaf spring with an eye end and a loop end. The eye end of the leaf spring is fixed but can rotate about its pin and the loop end of the leaf spring can slide in relation to a loop end pin when the brake shoe is in a braking position. The movement of the leaf spring allows the brake shoe to accommodate uneven tire wear between the pair of tires and apply effective braking force to each tire. The brakes are also connected to one another by a bar arranged to pivot about a center point of the brake unit, thereby allowing the brake unit to accommodate uneven tire wear between the left and right pair of rear tires.

A rear brake unit for a cargo dolly includes a left and a right brake that each have a leaf spring with an eye end and a loop end. The eye end of the leaf spring is fixed but can rotate about its pin and the loop end of the leaf spring can slide in relation to a loop end pin when the brake shoe is in a braking position. The movement of the leaf spring allows the brake shoe to accommodate uneven tire wear between the pair of tires and apply effective braking force to each tire. The brakes are also connected to one another by a bar arranged to pivot about a center point of the brake unit, thereby allowing the brake unit to accommodate uneven tire wear between the left and right pair of rear tires.

A brake apparatus for installation in an intermediate space between the wheels of a twin axle of a track-guided vehicle. The brake apparatus has two subunits able to be moved relative to one another, namely a first subunit with brake linings for the wheels of the first axle of the twin axle and a second subunit with brake linings for the wheels of the second axle of the twin axle. In their installed state, the subunits are supported in a displaceable manner in such a way that, through the displacement of the subunits, contact is made between the brake linings and the wheels. At least one distance sensor is arranged in one of the subunits of the brake apparatus. The distance sensor is configured to measure a distance between the first subunit and the second subunit.

Disclosed is unit brake, which is equipped with a cylinder apparatus in which a clutch mechanism that switches between transmitting or cutting off a biasing force of a spring brake part is disposed, is capable of preventing a braking force due to the spring brake part from unintentionally decreasing due to a meshing section of the clutch mechanism disengaging, and is of a size that can replace an existing unit brake, and maintains the performance of bearings in the clutch mechanism even with long-term use. The clutch mechanism of the unit brake includes: a nut member that rotatably screws on a spindle that is positioned in an area that communicates with the atmosphere, and is movably supported in a direction opposite to braking; a clutch that is disposed in a direction opposite to braking with respect to the nut member, and faces the nut member in the vicinity of the spindle; a clutch box that is formed in a cylinder shape, and houses the nut member and clutch on the inside; and bearings that rotatably support the nut member on the inside of the clutch box.

Disclosed is unit brake, which is equipped with a cylinder apparatus in which a clutch mechanism that switches between transmitting or cutting off a biasing force of a spring brake part is disposed, is capable of preventing a braking force due to the spring brake part from unintentionally decreasing due to a meshing section of the clutch mechanism disengaging, and is of a size that can replace an existing unit brake, and maintains the performance of bearings in the clutch mechanism even with long-term use. The clutch mechanism of the unit brake includes: a nut member that rotatably screws on a spindle that is positioned in an area that communicates with the atmosphere, and is movably supported in a direction opposite to braking; a clutch that is disposed in a direction opposite to braking with respect to the nut member, and faces the nut member in the vicinity of the spindle; a clutch box that is formed in a cylinder shape, and houses the nut member and clutch on the inside; and bearings that rotatably support the nut member on the inside of the clutch box.

The invention relates to a brake and to a method for controlling the brake. The brake comprises a base part, a braking piece movably supported on the base part, which braking piece is configured to be moved between a braking position and a releasing position, a spring, with the spring force of which the braking piece can be dropped into a braking position, a support member for limiting the initial position of the drop-out movement of the braking piece and also a controllable actuator, which is mechanically connected to the aforementioned support member and configured to displace the initial position of the drop-out movement of the braking piece with respect to the braking position.