Jack Device Used for Lifting Objects
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A jack is mechanical device used 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.
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jack, mechanical jack, car jack, floor jack, garage jack, hydraulic power, hydraulic cylinder, screw threadGalleries
Miscellaneous ToolsSource
Government Printing Office The Official Gazette of the United States Patent Office (Washington, DC: Government Printing Office, 1895)
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