Abstract: A hydraulic jack of the type typically employed for automotive repair work is equipped with a frame supported on wheels, a hydraulic unit for powering the jack, and an elevator mechanism for raising a lift plate in response to a ram actuated by the hydraulic unit. The hydraulic unit is supported in the frame without bolts or other fastening devices and thus is easily removable for repair or replacement. The elevator mechanism includes pivotable elevator arms for raising a roller which travels along an S-shaped lever. The lever supports the lift plate at one end and is pivoted in the frame at its other end.

Abstract: A jack is provided that is adapted to be used for lifting and handling heavy objects or loads such as vehicle engines, heads, manifolds, air conditioners and the like. The jack includes a means for permitting the device to be motor operated or manually operated. The jack is mounted on swivel wheels and the jack can be maneuvered in various directions.

Abstract: A lifting jack with its elevating linkage has an elongated base supported on wheels and a hydraulic ram horizontally disposed in the base. A block which is a structural part of the base incorporates a hydraulic reservoir, a pump, valving, and a lift-lower control. A single handle serves both to actuate the pump and manipulate the lift-lower control. An overload release valve which can be factory-adjusted to limit the load which the jack can lift is interiorly mounted and combined with the lift-lower control to inhibit tampering which could inadvertently overload the jack.

Abstract: A leverage device for use with various jacking means may be folded to occupy a minimum of space during storage but can be unfolded and set in an operative condition to be made fully functional to cooperate with various conventional jacking devices, the device providing a scissoring action for raising and lowering an object when the jack is actuated.

Abstract: Disclosed herein is an apparatus for lifting and supporting automotive bumpers and doors for installation. The apparatus includes an upright support member which is carried by a wheel base portion, a lifting lever which is pivotally mounted on the support member and a lifting strap which is carried by one end of the lifting lever and by which the automobile door or bumper is held. A locking chain is provided to hold the lifting lever and door or bumper carried thereby in place in an elevated position for installation. A brace which extends from the upright support member is carried thereby for holding automobile bumpers in proper alignment with the vehicle for installation and an adjustable strap guide is disposed about the support member for varying the angular orientation of a bumper during installation.

Abstract: The disclosure relates to a handling jack for large truck gear boxes, such as third members or the like; the handling jack being adapted to move into position beneath a truck and being provided with a normally vertical column which is adapted to be pivoted on a horizontal axis at a low lever away from a position over the frame of the jack so as to be moveable into position beneath a truck and retractable from a position beneath a truck; and the column member being moveable into vertical position and provided with a handling boom thereon so as to position the handling boom above a truck gear box or third member assembly so as to freely suspend the third member and allow angular freedom of movement thereof for readily removing and replacing the gear box or third member.

Abstract: A hydraulic lifting jack has a base supported on wheels, an elevating linkage, a hydraulic ram operating with the linkage and a handle for pressurizing and releasing the hydraulic ram. An integral block of rugged rectangular configuration serves a multiple purpose of providing a reservoir for hydraulic fluid, mounting the ram, mounting the pump and providing exteriorly precision drilled bores for all the hydraulic activity.

Abstract: A self powered carriage which receives a conventional hydraulic floor jack to enable a disabled and immobile automobile to be moved and selectively manuvered. The carriage receives a conventional hydraulic floor jack in a manner whereby the load bearing wheels of the jack are elevated and immobilized and in their place, a pair of independently controlled powered wheels on the carriage are utilized which, once an immobilized vehicle is elevated by the jack, the vehicle can be moved in a desired direction by selectively operating the powered wheels.

Abstract: A low profile air jack for lifting vehicles is described, in which the force exerted by a horizontally disposed air cylinder and piston assembly on the lever arm of a lifting member pivoted to the jack frame causes the lifting member to rotate, so that its front end engages and lifts the vehicle. The piston shaft of the air cylinder is connected to the lever arm of the lifting member by a flexible chain and sprocket assembly which acts as a force-multiplying mechanism so that the force acting on the lever arm of the lifting member is approximately double the force which would be exerted if the piston shaft were directly connected to the lever arm by a rigid member. The two flexible chains are connected to a stabilizing bar, which is pivotably attached to the jack frame for both vertical and horizontal movement thereto, rather than directly to the frame, so that equal forces are applied to both chains during the lifting operation.

Abstract: A high capacity portable jack which has a chassis consisting of front and rear axles supported on small wheels with parallel laterally spaced tension members connected to and extending between the axles. A jack having a lift arm connected directly to the rear axle and a hydraulic unit pivoted at the rear generally centrally of the lift arm and directly connected at the forward end to the front axle to subject the tension members only to a force tending to stretch the tension members to thereby require only lightweight tension members when the hydraulic unit is operated to raise the jack and lift an object with the saddle at the forward end of the jack.

Abstract: A device for lifting and transporting heavy objects on a surface including a hoist which is pivotally secured to a vertical standard that is carried on a base structure. The base structure includes a pair of outwardly extending legs which has primary wheels located adjacent the end thereof for transporting the hoist. A pair of auxiliary wheels are pivotally carried adjacent the primary wheels. The auxiliary wheels can be brought in contact with the surface lifting the primary wheels off the surface adding maneuverability to the hoist. A telescoping vertically adjustable safety standard engages the boom supporting the hoist for locking the boom in a fixed position.