Converter for converting a conventional car jack into a transmission jack

In combination with a low-clearance general service hydraulic jack and a cup head of which:

• the low-clearance general service hydraulic jack is of the type having:
• a low, wheeled frame;
• a handle operatively connected to the frame near one a rear end thereof and disposed rearwardly of the said rear end;
• a boom extending between a base end pivoted to the frame near the handle connection and an opposite end formed with a seat portion;
• and a hydraulic cylinder which stretches between the frame and the boom nearly extensively with the boom and which is actuated by pumping the jack handle through a pumping arc anywhere between extremes of about 12 o'clock and 3 o'clock as rearwardly of the rearend of the low wheeled frame to raise the seat portion of the boom;
• the hydraulic cylinder being sized to give the boom at least about a two (2) ton lifting capacity:
• wherein the seat portion is formed with a socket for accepting removable seating of a given head;
• and
• the cup head is of the type having a stem for removable seating in the socket of the seat portion:
• an improvement compising:
• a converter head comprising:
• a base plate defining a plane:
• a stem suspended beneath the base plate for removable seating in the socket of the seat portion wherein the vertical drop of the converter-head's stem during seating of the converter head is stopped substantially by the base plate thereof landing on the seat portion of the boom:
• a plurality of arms, each extending between a butt end and a tip end;
• lockable-adjustable means for adjustably mounting the arms to the base plate such that the tip ends can be located in various positions substantially in the plane of the base plate and for locking the arms in positions;
• and a finger, carried by the tip end of each arm, each finger for providing an upper contact end for propping a vehicle transmission thereon;
• wherein swapping back and forth between the cup head and the converter head allows a user to convert the jack reversibly between a non-specialized, general service variety into as for tipping up car bodies, and, a special transmission jack for propping up dropping out and servicing transmissions;
• wherein the base plate has lateral left and right edges along which each is formed with means for securing a chain, the improvement further comprising a chain for looping around a waist of a transmission propped by the fingers of the converter head, which chain is secured at opposite places by the chain securing means:
• wherein the chain-securing means comprises eyes formed in the base plate and one of bolts or hooks extending through the eyes for inserting through links of the chain:
• and,
• wherein the base plate comprises a pair of inclined down flanges, one each at the lateral left and right edge respectively of the base plate, wherein the eyes are formed in the inclined down flanges so that the one of bolts or hooks should extend up through eyes, as for insertion through links of the chain loop around the waist of the transmission propped upon the fingers, in such directions away from the inclined flanges as to spread wide and hence accommodate transmissions having waists having relatively large circumferences.