Патент USA US2124314код для вставки
July 19, 1938. .R. ROBISON ET A1. 2,124,314 BRACKET ‘JACK Filed May 22, 1957. INVENTORS Rama-'4 Ros/:0” GEO’QGEMMQu-L ATTORNEY. Patented ‘July 19, 1938 ‘ UNITED. STATES PATENT OFFICE ‘ ‘ 2,124,314 BRACKET JACK ., Russel Robison, San Francisco, and George H. Mosel, Burlingame, Calif. ' Application May 22, 1937, Serial No. 144,212 ‘ 6 Claims. (01. ‘254-98) bring the jack screw, directly under any part, “ This invention relates to screw ‘jacks gener ally, but particularly to a. screw jack for special 4 use in servicing automobiles. ‘The principal ob f ject of the invention‘isgto provide a portable quick operating screw'jack‘with a ‘frame adapt ed to'cooperate with the frameof an automo bile, hoist for lifting any desired part of an automobile already elevated. on the hoist. A particular object of the invention is a screw hoist of this type provided with a split nut for quick adjustment and/or removal of the screw. A further feature is to provide a special split of the automobile above. " Theuse of a special split nut through which our jack screw, passes permits almost‘ instan taneous initial ‘adjustment to position ‘before applying the lifting force, and as quick a re-‘ moval of the screw. ‘ a . Other features are the adjustability of the carriage, construction of the frame, extendibilityf to straddle any hoist frame or garage pit, etc.‘ In the drawing, I, 1, indicate in dotted lines nut in a screw jack which‘ will automatically the frame or horizontal spaced steel beams of the conventional automobile cylinder or hydraulic _lock itself against opening‘ when pressure is hoist, and ‘upon which automobiles are elevated: 15'" applied. ‘ } . A further object is toprovide a construction which may be packed flat on its frame. A still furtherfeature is ,to provide a sup porting bracketwhich may be extended to strad dle any automobile hoist frame or garage pit. Other features and advantages of the construc tion will appear in the following description and accompanying drawing. , ' ‘In the drawing: _ Figure 1 is a side elevation of our improved bracket jack, indicated," as supported on the frame of a cylinder type automobile hoist. Figure 2 is a plan view of our jack. Figure 3 is a cross section of Figure 1, as seen . 3054 from the line 3-p-3 thereof. a Figure 4 is an enlarged cross, section of the split nut and its carriage as seen from the line 4-4 of Figure 2. Figure 5 is a detached vertical section of one "*iaw of the split nut. jack frame supported on the lower ‘flanges of the beams, and with the jack-screw 3 of our jackpositioned in about the middle of the frame as for applying. against a portion of the elevated automobile not shown. ' . ' preferably made extendible to straddle any dis tance between hoist beams, I, or across any garage pit for use on cars where the work is done. from,the pit. In the drawing the ex tendible frame is shown composed of an outer. > section having two angleiron sides 4 and a nar row or inner section having two similar angle iron‘: sides 5 slidable longitudinally within the wider section, and within which inner section is slidably supported a carriage 6 which supports thetwo sections ‘I, 1’ of the split nut which en gage the jack-screw 3. ‘ The, side bars or angle irons 4 and .5 are spaced .at their ‘outer end by members l!v which of the car still further up’ in reference ‘to the springs for greasing and/or adjusting the same, l_l passing through the lower or horizontal webs. of our bracket jack applied directly to the cyl inderof a cylinder type automobile hoist. Before describing the invention in detail, it simplify the understanding of the same to '40 ‘will state that our special-bracket jack is principally intended for use in connection with service sta tion hoists of the cylinder or other type which bodily lift the car up, for after it is thus ‘lifted up it is frequently desirableto forcethe chassis and it is here .where our bracket jack‘ has par 20 The frame of our jack maybe rigid, but is are preferably Z.-irons or their equivalent, riv eted or welded to the side bars, and the. inner ends of the inner frame section are spaced by a bar 8,.whereas‘ the other ends of‘ the outer frame are leftfree of any cross tie which might, interfere with the positioning of the jack-screw. to any place along the frame, but they are held against spreading by means of a pair of clamps. 9, whichare formed of short angle‘ bars over lapping the upper edges of ‘both frame sides and grooves at ID to receive the upper edges of bars 5. These/clamp bars are held in place by bolts Figure 6 is an elevation of a modi?ed form H for servicing, vand 2 represents the ends ofour' 15“ of bars 4 and which may be tightened up to ?rmly lock the frame sections at any point of 50 Our jack is provided witha specialsupporting extension. so that‘it cannot accidentally be re-‘ bracket which‘is‘ adapted‘ to engage the hoist; tracted to fall off its end supports when in use, ‘It will be noted from Figure 3 that the inner structure upon which the automobile has already frame'section is spaced inward from the outer been ‘raised, and along which‘ bracket" the split nut‘ carriage of "our 1 jack vmay beu'adjusted to . frame sides by bolts 1 I,‘ and from Figure 2 also 55 4 ticular ‘value. ‘ . l ‘ 2 , 2,124,314 by spacing nuts 12 so that it rests on the lower webs 4’ of the outer frame inward of the rounded inner corners common to such angle bars. The split nut carriage 6 is preferably made of a short section of a channel iron resting upon the horizontal webs 5’ of inner frame section bars 5 and is held in sliding relation thereto by a lower plate I 3 which is spaced below the chan nel section 6 as by blocks l4 and bolts l5 so 10 that plate l3 freely overlaps the margins of webs 5'v and comes close to the inner edges of webs 4' to function as a guiding element for the extended bracket frame absolutely rigid, the frame and carriage are moved at right angles to each other to bring the jack-screw directly under the part to be lifted, the screw is simply shoved upward to contact the part to be raised, then let down slightly to close the nut about the jack screw, and the crank lever 30 turned to apply the power. To release the jack, the screw must ?rst be unscrewed a short distance, the nut opened manually and the screw pulled down, or entirely 10 through the nut if head I6 is removed. There are some automobile service hoists which sliding the carriage back and forth along the employ a couple of hoist cylinders without a frame. connecting frame, or “drive-on” frame as illus 15 The jack-screw is provided at its upper end trated by the beams I of Figure l, but each hoist 15 with a loose head or pressure contact member cylinder has its own bracket or fork arms to en gage under the axle of the car. For such hoists resting on a large hardened ball I‘! revolvably . our bracket may be of modi?ed form as indicated seated in a retaining socket formed in the end in Figure 6 wherein the horizontal portion of the of the screw. The head l6 may be freely lifted bracket is shown at 32 with a split-nut carriage 20 [6 which takes the form of an inverted cup off when not in use, and a standing pin I8 is provided on the carriage 6 over which the head may be placed, and the jack-screw withdrawn from the split'nut and laid alongside the car 25 riage when the device ‘is, dismantled for ship ping or carrying about. ' The two sections of the split nut are horizon tally pivoted at their remote ends at I 8', l8" to the sides I9 of a small piece of channel iron 20secured to carriage channel plate 6 by bolts Id. '35 The form of the split nut halves is best shown in Figure 5 wherein they will be seen to be formed with a thread 2| for about the upper half only and with an enlarged bore below tapered out wardly at 22 to clear‘ the threaded jack-screw 3 when the nut sections are opened to the po l3’ slidably supported on it as described for Figure l, and with one end of the bracket formed with a hookportion' 33 formed to engage the upper end of the hoist cylinder or column 34 or the axle bracket 35, and the outer end of the bracket 32 is angularly braced'as by a pair of braces 36 which, at their lower ends engage opposite sides of the cylinder 34 and are tied by a cross bar 37 which rests against the cylinder. In this modi?ed form the jack-screw 3’ is pref erably provided with'a vise handle 38 to better clear the braces 36 when operating close to them. Having thus described our invention and the manner of its use, what we claim is: 1. In a jack of the character described, a bracket comprising a ?rst pair of spaced angle sition shown in Figure 4 to the limit of their bars provided with means at one end tying the rear stop shoulders 23. bars together and forming an outwardly directed flange, a second pair of spaced angle bars slid ‘ , ' Also to be observed is that each nut half is 40 formed with a lower semicircular flange 24 which falls snugly within a circular opening 25 bored through the bottom of the carriage, when the nut is closed, to thus relieve the pivot bolts l8, l8’ from spreading tendency of the nut halves. The jack-screw 3 is guided centrally with respect to the nut halves by a loose round bore l3’ in lower plate l3. The nut halves each have a small projecting ?nger or lug 26 at one lower corner, and a cor 50 responding recess 21 at the other, and are rights and lefts in this respect so that the lug of one will engage the recess of the other and compel both to work together in opening and closing. Also to be noted is a standing ?ange 28 on each 55 half with a lug 29 for gripping with the ?nger to open the nut halves, or striking with a tool. It should be observed that the pivot points are well below the threaded portions of the nut so ‘that the downward force of ‘the jack-screw tends to hold the nut halves ?rmly closed while the screw is under pressure of work, as any open ing ‘of the nut halves will tend ?rst to lift the jack-screw bodily a short distance before the halves can open. 65 . At the lower‘end of the screw is a suitable lever handle 33 preferably provided with operating cranks 3| at one or both ends. It may be noted that by reason of the particu lar construction of our split nut as described, it 70 operates perfectly with a common threaded jack screw without tendency to separate. _ In operation of our improved jack the bracket 3.5.; ably sup-ported within the ?rst pair in projecting 40 at the outer ends of the second pair of angle bars tying them together and forming an outwardly directed ?ange, means for locking both pairs of relation to the untied ends of the ?rst pair, means angle bars at various degreesof extension, a car riage slidably supported on the second pair of 45. angle irons, and a jack screw extending through said carriage operating in a split nut supported thereby. . . 2. In a jack of. the character described, a ver tically arranged threaded jack screw, a split nut 50 engaging the screw, said split nut comprising two nut-halves parted along a vertical line, a base plate upon which the nut-halves are supported when closed, and horizontally. extending pivots pivoting the nut-halves to said plate for opening and closing. I . 3. In a jack of the character described, a ver tically arranged threaded jack screw, a split nut engaging the screw, said split nut comprising two nut-halves parted along a vertical line, a base plate upon which the nut-halves are supported when closed, and horizontally extending pivots pivoting the nut-halves to said plate for opening and closing, each nut-half provided with an aligning shoulder centered in an opening in said 65 plate when the halves are closed and preventing the nut-halves from spreading. 4. In a jack of the character described, a ver is extended to the required length to straddle the tically arranged threaded jack screw, a split nut engaging the screw, said split nut comprising two nut-halves parted along a vertical line, a base plate upon which the nut-halves are supported space over the pit or between the hoist beams l,v tightened with bolts l I so as to hold pivoting the nut-halves to said plate for opening 75.. clamps 9 are 25. when closed, and ‘horizontally extending pivots 3 2,124,314 and closing, and means positively connecting the nut-halves together for simultaneous opening and closing. screw and spaced outwardly therefrom and also spaced below the threading of the nut-halves > so as to require an upward swinging of the nut tically arranged threaded jack screw, a split nut halves in opening them from the screw whereby they are automatically held closed when the 5 engaging the screw,'said split nut comprising two screw is under pressure. 5. In a jack of the character described, a ver nut-halves parted along a vertical line, a base plate upon which the nut-halves are supported when closed, and horizontally extending pivots pivoting the nut-halves to said plate for opening and closing, the pivots of the nut-halves being positioned respectively at opposite sides of said 6. In the construction as speci?ed in claim 5, a lug formed on each nut-half arranged for strik ing to open said halves. RUSSEL ROBISON. GEORGE H. MOSEL.