sprag

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sprag

 (sprăg)
n.
1.
a. A piece of wood or metal wedged beneath a wheel or between spokes to keep a vehicle from rolling.
b. A pointed stake lowered at an angle into the ground from a vehicle to prevent movement.
2. A prop to support a mine roof.

[Perhaps of Scandinavian origin.]

sprag

(spræɡ)
n
1. (Automotive Engineering) a chock or steel bar used to prevent a vehicle from running backwards on an incline
2. (Mining & Quarrying) a support or post used in mining
3. (Mining & Quarrying) mining NZ a steel bar inserted into the wheels of a box to act as a brake
[C19: of uncertain origin]

sprag

(spræg)

n.
a pole hinged to a rear axle, as of a cart, in such a way that it can act as a brace against rolling downhill.
[1835–45; of uncertain orig.]

sprag

- A block placed behind a car wheel to keep it from rolling down a hill.
See also related terms for rolling.

sprag

A projection preventing the movement of platforms or pallets in the side guidance rails in an aircraft cabin.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sprag - a chock or bar wedged under a wheel or between the spokes to prevent a vehicle from rolling down an incline
chock, wedge - a block of wood used to prevent the sliding or rolling of a heavy object
2.sprag - a wooden prop used to support the roof of a mine
prop - a support placed beneath or against something to keep it from shaking or falling
Translations
References in periodicals archive ?
Yamaha also gives the Grizzly and Viking engines a fully automatic CVT transmission with a very unique sprag clutch system that creates consistent belt tension, especially at idle, greatly increasing belt life.
This situation indicated a sprag clutch slippage, an emergency that "can lead to catastrophic failure of the aft transmission.
According to Van der Graaf project manager Rick Zander, a sprag clutch normally keeps the loaded belt from back-driving the reversible motor.