4949 results about "Brake" patented technology

A braking device for slowing a snow board which is to be used by novice or inexperienced users. The invention is comprised of a blade which is affixed either between the rear boot attachment means and the rear of the snow board or on the bottom upturned portion of the rear end of the snow board. The blade is adjustably angled forward against the snow in the direction of travel. When the blade is in the lowered position it cuts snow and directs the cut snow upward over the blade. A slot in the snow board just ahead of the blade allows the snow to pass upward through the snow board. Alternately for another embodiment, the blade is held in a bracket which is affixed to the rear upturned surface of the snow board. For this embodiment of the invention, the cut snow is directed upward between the blade and its supporting structure. The preferred embodiment of the invention is to employ a broad straight bottom edge for the blade about 4 inches wide with a maximum depth of cut of about 1 / 2 inch. An acceptable angle of cut of the angled blade can range from a vertical position to about 45 degrees downward and forward. When the snow board is not being used, the blade is repositioned by loosening the blade and sliding or rotating it relative to its support with tightening of the blade fixing means for its final securement. In another embodiment, a fixed blade in the form of a angle is attached directly to the bottom of the snow board perpendicular to the length of the snow board. Such blades can extend downward different distances to provide different amounts of drag.

The invention relates to a high performance and low cost C / C-SiC composite brake disc, a preparation method and application thereof. The preparation method includes: carbonizing a brake disc prefab, and densifying the carbonized brake disc prefab by chemical vapor infiltration method to obtain a C / C composite material; then performing heat treatment in an inert atmosphere to improve the graphitization degree of the composite material; then conducting machining to obtain a C / C composite blank; treating the C / C composite blank by molten silicon infiltration method to obtain a C / C-SiC composite brake disc; then treating the C / C-SiC composite brake disc by means of chemical vapor infiltration or precursor infiltration pyrolysis; and machining the obtained product into a final design size, thus obtaining a composite brake disc finished product. The C / C-SiC composite brake disc and the preparation method thereof provided by the invention can reduce the preparation cost and improve the mechanical performance, thermal conductivity and friction and wear performance of the brake disc.

Hand-operated brakes caster system is easy to use, compact, lightweight, low-cost. A fork supports a rotating wheel via an axle. A bag mounted base supports the swinging fork. A hollow swing shaft mounts on a base bearing. A force transmitting wire is pulled by a rotation knob in a controller away from the wheel. Opening direction force is applied by a spring to the wire in the opening direction. Therefore, if the knob is rotated by an angle not smaller than a predetermined value, reverse rotational moment is applied, locking the rotation knob. Force transmitted to a lever via the wire is magnified by the action of the lever, and the resulting force pushes a brake pin located inside the fork swing shaft. The brake pin abuts the tire resulting in frictional resistance preventing rotation of the wheel.

A double-drag type lever-drag mechanism for a double-bearing trolling reel. The drag mechanism is configured to improve overall reel braking and drag performance by securing the brake release state reliably and by a design that curbs increase in spool inertia and provides for ease of operation and precision in attaching the drag cover. The lever drag mechanism 7 brakes the spool 3 rotation in the line spool-out direction, and is equipped with a brake disk 25 non-rotatably fitted to one end of the spool such to be axially shiftable a predetermined distance. Sandwiching the brake disk 25 between friction disk 26, immobilized against axially outward movement, and axially shiftable friction disk 27 rotates the drag / brake disks 25-27 unitarily with the spool 3. Against the spool 3 a coil spring 28 urges the brake disk 25 away from the spool 3. A shifting mechanism 29 reciprocates the spool 3 and drag / brake disks 25-27 axially. The mounting configuration for the drag cover includes a circular groove 3c radially beyond which is a plurality of circumferentially spaced threaded holes 3d in the end face of the spool 3; a tubular centering portion 41c that snugly fits into the circular groove 3c, radially extending from which is a ring-shaped mounting portion 41b; an O-ring 42 in the circular groove 3c making sealing contact circumferentially with the tubular centering portion 41c; and a plurality of machine screws 44 passing through-holes in the mounting portion 41b and screwed into the threaded holes 3d.

A braking device configured for use with the counterbalancing system of a garage door. The brake device includes a support bracket, a ratchet wheel, a pawl arm, and a biasing spring. The support bracket is rigidly connected to a fixed structure and has a guiding slot. The ratchet wheel is securely mounted about the overhead shaft of the counterbalancing system and has at least one notch. The pawl arm has first and second ends, the first end of the pawl arm being pivotally connected to the support bracket and the second end of the pawl arm cooperating with the guiding slot and being movable with respect to the support bracket along said guiding slot. The first and second ends of the pawl arm are further connected to flanges of a plug on either side of the overhead shaft. The biasing spring is operatively connected between the support bracket and the pawl arm so as to exert a biasing force for biasing the pawl arm towards the ratchet wheel. The pawl arm is devised so that, an element thereof is adjacent to the ratchet wheel, said element being shaped and sized to be removably insertable into at least one notch of the ratchet wheel so as to block rotation of the ratchet wheel, and thus block rotation of the overhead shaft, in the event of a failure of the counterbalancing system of the door. The brake device further includes a shear pin operatively connectable between the support bracket and the pawl arm for maintaining said pawl arm, prior to installation of the brake device onto the counterbalancing system, in an intermediate configuration between the first and second configurations. The shear pin is made of a specific material being breakable when the pawl arm is rotated with respect to the support bracket when the torsional force of the torsional spring transmitted to said pawl arm via the plus has reached a predetermined value, ensuring namely that a predetermined minimal amount of load is present is said torsional spring for counterbalancing purposes.