Hydraulic Jack

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. Car jacks usually use mechanical advantage to allow a human to lift a vehicle by manual force alone. 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). The jack shown at the right is made for a modern vehicle and the notch fits into a hard point on a unit body. Earlier versions have a platform to lift on the vehicles' frame or axle.In the 1967 show Speed Racer a jack was used in the mach 5 as button A.

Jack (device) :''For other uses, see [[jack]] or [[carjacking]].'' ... ft heavy loads or apply great forces. Jacks employ a [[screw thread]] or [[hydraulic cylinder]] to apply very high linear forces.

Citroën DS ... er steering (though this was added as an option later), and instead of the hydraulically controlled manual transmission and clutch, it had a conventional clutc ... ==Technical Innovation - Hydraulic System==

Meillerwagen ... firing stand and then levelled via the two extendable outriggers with end-jacks.<ref>Kennedy. 45</ref> The rocket was raised via the Meillerwagen lift frame and [[hydraulics]]. When vertical, the rocket was suspended above the firing stand, which ...

Sosrobahu ==Inspiration from a hydraulic car-jack== ... ad been accidentally spilled. When the car was pushed, it pivoted with the jack as the [[Axis of rotation|axis]]. He noted that it is a [[principle]] of [ ...

Hydraulic rescue tools '''Hydraulic rescue tools''' are used by [[Emergency service|emergency rescue]] personn ... ... d using a pressure-relief valve and spring setup, or dual-acting, in which hydraulic pressure is used to both open and close the suzzette cylinder.

Linear actuator ... of the jack handle is converted mechanically into the linear motion of the jack head. Mechanical actuators are also frequently used in the field of lasers ... ===Hydraulic actuators===

Elevator ... stway". In the past, lift drive mechanisms were powered by steam and water hydraulic pistons. In a "traction" lift, cars are pulled up by means of rolling ste ... ... ss rail mounted gearless machines, and microprocessor controls. {{Details|#Hydraulic elevators}}

Barnett Shale ... al quantities from this formation until recent improvements were made in [[hydraulic fracturing]] technology and horizontal drilling, and there was an upturn i ... ... texas.edu/news/feats/2007/barnett/neighbor.html Won't You Be My Neighbor? (Jackson School of Geosciences, Jan. 2007)]</ref> Some local governments are re ...

Forklift truck ... aller [[Pallet|pallet]]-moving tool sometimes called a pallet truck|pallet jack}} * [[pallet jack|Hand pallet truck]]

Tower Subway ... nnel. As excavation progressed, it was forced ahead by hand operated screw jacks to act both as a ring‑shaped cutter and protection for the workmen. It ... ... behind the tunneling shield as it moved forward so that the shield's screw jacks could push against it.<ref>John Alfred Spender, ''Weetman Pearson, First ...

Strand jack ... ngineering purposes. Capable of lifting loads of over 400 [[ton]]s, strand jacks were invented in the 1970s.{{Fact|date=March 2008}} ... s per lifting point. This program can operate and control dozens of strand jacks simultaneously. During operation all loads and anchor positions are displ ...

Jackhammer [[Image:jackhammer.jpg|thumb|220px|A portable jackhammer being used to break up [[roadworks]]. [[Pneumatic]] hose can be seen ... ... air-drill]] or familiarly, a windy-drill or [[rotary hammer]].) The word ''jackhammer'' is used in [[North American English]] and in [[Australia]], and '' ...

Accropode ... ttp://www.sogreah.fr Sogreah] in 1981. The Accropode is robust, has a high hydraulic stability and is therefore reliable. Accropode concrete armour units are a ... === Hydraulic stability ===

Longwall mining ... ng height of up to 6 m and have yield rating of 1000-1250 tonnes each, and hydraulically advance itself 1m at a time. ... fitted the ranging arms which can be ranged vertically up down by means of hydraulic rams, and onto which are mounted the shearer cutting drums which are fitte ...

Trailer sailer ... ring. The [[Keel]] is not fixed but may be retracting, removable or swing, hydraulic, winch or electric operated and the ballast may be water that is drained t ... ... p units which can be fitted to boat trailers, enabling electric control of hydraulic disc brakes.

Fire apparatus ... its length, the ladder is [[telescopic]]. Modern turntable ladders are [[hydraulic]] or [[pneumatic]] in operation. ... long ladders which were seen on fire engines before the widespread use of hydraulics.

Tram accident ... (electricity)|grounding]] equipment, and hydraulic [[Jack (device)|lifting jacks]] for trams. Some trams are able to drop some [[sand]] on the rails to in ... ... cation, retrieved on June 18th, 2007.</ref>. Cranes, tow trucks, hydraulic jacks and rollers can be used to move a derailed tram back to its rails (''see ...

Richard Tangye ... ers Tangye was the manufacture of machinery, and their hydraulic [[lifting jack]]s were successfully employed in the launching of the steamship [[SS Great ... ... ing to their business, which came to include every kind of power-machine - hydraulic, steam, gas, oil and electricity. The business was subsequently turned int ...

Cribbing (rescue) ... as a roof support. Cribbing has largely been replaced by [[hydraulic jack|hydraulic shoring]] in modern mining aplications. ... ion from fluids the cribbing may come in contact with (e.g. oil, gasoline, hydraulic fluid).

Prestressed concrete ... re [[Wedge (mechanics)|wedged]] in position and maintain tension after the jacks are removed, transferring pressure to the concrete. The duct is then [[gr ... ... d has set for about a week, the cable ends will be pulled with a hydraulic jack, shown in picture number nine, until it is stretched to achieve the specif ...