The invention's structure provides a device for removing stuck brake key screws from an aircraft's landing gear's wheels. The device generally comprises a base bottom, right and left side arms, a threaded rod, and a screw driver bit holder. The curvature of the base bottom preferably matches the curvature of a wheel hub opposite to the location of a stuck screw. When operationally used, the device provides for optimal or virtually optimal engagement of the device with the head of a screw to be removed.

A hydraulic piston resetting tool for a disk brake includes a main body, a first pressing plate, a second pressing plate and a holding pole, wherein, one side of the main body is connected to the first pressing plate, the second pressing plate is adjacent to the other side of the main body, and the holding pole is connected to the front end of the main body. The inside of the main body is pivotally configured with a first cylinder barrel, the inside of the first cylinder barrel is pivotally configured with a second cylinder barrel, and the inside of the second cylinder barrel is pivotally configured with a stopping piece. The stopping piece is connected to the second pressing plate. The stopping piece activates the reciprocating displacement of the second pressing plate.

A container for exchanging a fluid under pressure has a cylindrical tank with caps and seals at opposite ends of the tank. The caps are moved between the unsealed arrangement and the sealed arrangement using a tie rod engaging threaded bores in the caps. Each seal is held in a groove in a flange of each cap which is spaced from a shoulder between the flange and the cap's head. In the sealed arrangement, the seals are radially compressed between the flange and the tank's interior sidewall. With a central tie rod threadedly connected to threaded bores at the center of the caps, rotating the caps relative to the tank axially moves the caps between the sealed arrangement and the unsealed arrangement. The top cap has a fill port with a threaded plug, an inlet port, and an outlet port with a tube extending to the bottom of the tank.

A quick release device of a brake cylinder includes: a first support iron plate; a second support iron plate installed with an interval from a side of the first support iron plate; an iron plate ejector, installed between the first and second support iron plates, for expanding the relative distance between the first and second support iron plates; a wrench assembly, sheathed on the iron plate ejector in a quick release status; and at least one quick release portion, installed at a relative position of the iron plate ejector and the second support iron plate, so that the second support iron plate is in a quick release status.

A brake system for a vehicle such as a bicycle is disclosed. The brake system may comprise an improved master cylinder assembly configured for adjustment (such as adjustment of the stroke length, stroke start, etc.). The brake system may comprise a caliper assembly with an improved arrangement of flow paths configured to facilitate maintenance (such as to remove/bleed air and/or fluid from the body of the caliper assembly, inspection, etc.); the caliper assembly may also be configured for use with a tool (e.g. configured to fit in body to remove/bleed air and/or fluid from flow paths during maintenance). The master cylinder assembly may be configured (e.g. manufactured/produced, assembled, etc.) so that a setting and/or adjustment of the brake stroke and/or lever action/actuation can be provided by any one independent mechanism or one separate adjustment mechanism (e.g. without any other adjustment mechanism) or by a combination of adjustment mechanisms (e.g. in a combination with one or more adjustment mechanism); operation of a mechanism for setting and/or adjusting the brake stroke (e.g. travel of piston) may comprise engagement of a pushrod; the mechanism may comprise a feature configured to engage the pushrod (e.g. by direct action on the pushrod or a feature of the pushrod or by indirect action through a link, adjuster, etc. configured to engage the pushrod). The master cylinder assembly may be configured to be set and/or adjusted/tuned within the indicated range to provide an intended performance and/or “feel” for the operator at the brake lever (e.g. at an adjuster, link, etc.).

A railroad brake stick can include: a head having a planar shape with a recesses and/or protrusions on one or more side surfaces of the planar shape, the planar shape having a head interlocking groove on a hilt region; a cross-support having a planar shape with a support interlocking groove interlocked with the head interlocking groove such that the planar shape of the head crosses with the planar shape of the cross-support to form an interlocking region; and a handle coupled to the head and cross-support such that the interlocking region is within an end of the handle. In some aspects, a cover is over the handle. n some aspects, the head is a composite material and the cross-support is a composite material and the handle is a composite material.

A wheel cylinder adjuster includes a rotational disc, an axle, two guiding discs and two groups of claws. An oval slot extends in a first side of the rotational disc. A flower-shaped slot extends in a second side of the rotational disc. The axle is inserted in the axial aperture of the rotational disc. The first guiding disc is connected to the axle against the first side and includes two opposite radial slots. The second guiding disc is connected to the axle against the second side and includes three radial slots. Each claw in the first group is movably inserted in one of the slots of the first guiding disc and includes an insert movably inserted in the oval slot. Each claw in the second group is movably inserted in one of the slots of the second guiding disc and includes an insert movably inserted in the flower-shaped slot.

A multi-function portable optoelectronic apparatus to determine the profile of a brake disk and the profile of the tread of a tyre comprising an optoelectronic assembly for emitting a laminar beam of light along an optical emission axis so as to project onto the brake disk or onto the tread a luminous line and acquire an image containing said projected luminous line, a tubular case which can be gripped by hand, which contains said optoelectronic assembly and is designed to be arranged resting on the brake disk during determination of the profile of the brake disk and an angular adapter member designed to be coupled in a stable but easily removable manner to said case shaped to be arranged resting on the tread during determination of the profile of the tread; an electronic system configured to receive the image and determine the profile of the brake disk or the profile of the tread on the basis of the luminous line contained in said image.

A device for checking gap tolerance between an adjustable portion of a brake switch and a brake pedal includes a handle and one or more probes extending from the handle. Each of the one or more probes include jaw portions defining multiple stepped regions of increasing thickness with decreasing distance from the handle and a slot extending through the multiple stepped regions. The slot is configured to be inserted between the adjustable portion of the brake switch and the brake pedal. A dimensional tolerance of the slot in at least one of the stepped regions equals a preset gap tolerance between the adjustable portion of the brake switch and the brake pedal.