Jack (device)
A jack is a mechanical device used as a lifting device to lift heavy loads or apply great forces. Jacks employ a screw thread or hydraulic cylinder to apply very high linear forces.
A mechanical jack is a device which lifts heavy equipment. The most common form is a car jack, floor jack or garage jack which lifts vehicles so that maintenance can be performed.
More powerful jacks use hydraulic power to provide more lift over greater distances. Mechanical jacks are usually rated for a maximum lifting capacity (for example, 1.5 tons or 3 tons).
Read more about Jack (device): Hydraulic Jack, Pneumatic Jack, Strand Jack, Farm Jack
Famous quotes containing the word jack:
“Personally I think we’re over-specialized. Why it’s getting so we have experts who concentrate only on the lower section of a specimen’s left ear.”
—Martin Berkeley, and Jack Arnold. Prof. Clete Ferguson (John Agar)