- sprag brake
- A sprag is a stick (of wood or metal) which is inserted into gears or even into the dirt to stop the motion of something.
Dictionary of automotive terms. 2015.
sprag brake
Look at other dictionaries:
sprag brake — A positive mechanical brake for locking the wheels of a helicopter parked in a confined space or on a rolling deck. Equivalent to a parking brake … Aviation dictionary
brake — [1] To slow down a vehicle. [2] The mechanism that converts motion (kinetic energy) into heat energy through friction. The most common instance is found in the wheels of cars where the brake shoes or disc pads are designed to press against the… … Dictionary of automotive terms
sprag — (n.) prop in a mine, 1841, of unknown origin. Transferred by 1878 to wood blocks, etc., used to brake motor vehicles. As a verb, from 1841. Related: Spragged; spragging … Etymology dictionary
Sprag clutch — One way bearing combining sprags and bearing rollers in one race A sprag clutch is a one way freewheel clutch. It resembles a roller bearing, but instead of cylindrical rollers, non revolving asymmetric figure of eight shaped sprags are used.… … Wikipedia
Sprag — A sprag is a one way freewheel clutch used in a number of applications. It resembles a roller bearing with rollers shaped like a figure eight and cocked with a spring. When the unit rotates in one direction, the rollers stand up and bind because… … Wikipedia
sprag — noun 1》 a stout stick or bar inserted between the spokes of a wheel to act as a brake. 2》 a prop in a coal mine. Origin C19: of unknown origin … English new terms dictionary
sprag — n. 1 a thick piece of wood or similar device used as a brake. 2 a support prop in a coal mine. Etymology: 19th c.: orig. unkn … Useful english dictionary
Automatic transmission — An automatic transmission (commonly AT or Auto ) is an automobile gearbox that can change gear ratios automatically as the vehicle moves, freeing the driver from having to shift gears manually. Similar but larger devices are also used for heavy… … Wikipedia
Semi-automatic transmission — Transmission types Manual Sequential manual Non synchronous Preselector Automatic Manumatic Semi automatic Electrohydraulic … Wikipedia
Hydramatic — (also known as Hydra Matic) was an automatic transmission developed by both General Motors s Cadillac and Oldsmobile divisions. Introduced for the 1940 model year, the Hydramatic was the first fully automatic mass produced transmission developed… … Wikipedia
