US2786649A - Adjustable jack head - Google Patents

Description

A. H. BOTTORFF 2,786,649

ADJUSTABLE JACK HEAD March 26, 1957 2 Sheets Sheet 1 Filed July 11, 1955 UWD DD 0 [1 U 0 GT 38 D o D 'D E IO U D FIGURE 4.

5| 2 52 4] 45 I 4 6| HI!!! '5554 -43 5 59 3a 4 'l 57 51g 37 44 35 42 u 1 4'9 W1, J'l h. H 50 l 2 47 I I 52 5| FIGURE 5. 37 1 I I l 44 Nagy 44 A i-' 45 1 INVENTOR ALBERT H. BOTTORFF. FIGURE 2. I ATTY.

March 26, 1957 BOTTORFF 2,786,649

ADJUSTABLE JACK HEAD Filed July 11, 1955 2 Sheets-Sheet 2 FIGURE ll.

INVENTOR ALBERT H. BOTTORFF ADJUSTABLE JACK HEAD Albert H. Bottorfi, St. Joseph, Mo.

Application July 11, 1955, Serial No. 521,250

1 Claim. (Cl. 254-1) This invention relates to an improvement in a jack base and more particularly to the necessary economical structure for lifting loads or objects located very close to the floor or pavement.

An advantage of the present improved base is in the economical provision of a jack having a pair of base plates spaced apart for the support of the jack post so that the lift means or plate can be conveniently lowered to the floor or pavement and inserted below an article to be lifted, thus making a small lift with a pinch bar sufficient for the insertion of the lift means or plate between the article and floor.

With this primary advantage the improved jack will be more fully understood from the accompanying drawings, this specification and the claim appended.

In the drawings:

Figure 1 is a perspective view of the improved jack illustrating the front and left side thereof, the base plates and lift means or plate being on the floor in the lowered position.

Figure 2 is an enlarged sectional fragmentary view taken on lines 22 of Figure 5 and rotated clock-wise 90 degrees to illustrate the lower portion of the perforated web of the jack post in an upright manner bolted to the support plates.

Figure 3 is a perspective view illustrating the lift means or lift plate in an inverted position, from that shown in Figure 1, with the integral upright member turned downward and the connection ribs projected therefrom.

Figure 4 is a perspective view of the improved jack illustrating the left side and rear thereof, the lift member being in the inverted position and the slidable head raised to an intermediate height on the jack post.

Figure 5 is a sectional view 'taken on lines 5-5 of Figure 1 and rotated clock-wise a few degrees to illustrate a plan view of the pair of base plates with support plates secured thereto and bolted to the section of the jack post, the sideplates and wheels are secured thereto.

Figure 6 is an enlarged side view of the slidable jack head mounted on a fragment of the jack post, and part of the jack handle is broken away.

Figure 7 is a sectional view taken on lines 77 of Figure 6 illustrating only the latch and a portion of the jack handle.

Figure 8 is a rear view of the slidable jack head with a portion of the jack post being broken away above and below the slidable jack head.

Figure 9 is a sectional view taken on lines 9-9 of Figure 8 with the climbing pin withdrawn from the jack post web.

Figure 10 is a sectional view taken on lines 10-10 of Figure 8 illustrating only the upper portion of the slida ble jack head with other parts being broken away.

Figure 11 is a sectional view taken on lines 11-11 of Figure 8 with the upper climbing pin withdrawn from the jack post perforated web.

Figure 12 is a perspective view of a lift member being nited States Patent 0 aligned by means of their longitudinal axes.

f I: feas Mar-v a-hook attached thereto to illustrate the use of other kinds of lifting apparatus for various types of loads.

The slidable head 20 preferably comprises; the slida ble housing 21, slidable guide member 22, toggle links 23 having one end of each thereof pivotally connected to slidable guide member 22 at 24 and the opposite end thereof'being pivotally connected to lever 25 at 26, the lever 25 pivotally connected to slidable housing 21 on pin 70, engageable climbing pin 27 slidably retained in housing 21, engageable climbing pin 28 slidably retained in guide member 22, compression springs 29 and 30 being around the engageable climbing pins 27 and 28 respectively and being confined between the bracket ends 31 and 32 respectively and actuator pins 33 and 34 respectively, reversing cam member 35, reversing lever 36, and the actuating parts for moving the lift member upwardly, downwardly, or support the lift member on the upright jack post 37 by the engageable climbing pins 27 and 28. These parts are all old and are associated with the invention to illustrate an operable jack slidable head'l20.

Other types of operable jack heads may be used without departure from the improved invention.

The'upright jack post 37 is provided with the usual perforated web 38 for the climbing pins 27 and 28. An upright handle 39 is attached to the upper portion of the upright jack post 37 with the bolt or rivet 40. The handle projects above the post 37 and both are preferably A person may grasp this handle with one hand and lift it for changing locations thereof and the handle is also convenient for pulling or pushing the jack on its wheels 52.

A pair of flat, horizontal and elongated base plates 41 are spaced parallel, the front ends 42 thereof being designated the toe and the opposite ends 43 being designated the heel. A pair of support plates 44 are each bent flatwise into a U shape. Each support plate has the curved portion of the U shape secured to the lower end of the jack post perforated Web 38 by bolt 45. The pair of U-shaped support plates 44 are bolted on opposite sides of the jack post perforated web 38. A pair of side plates 46 are provided with one located along the outside longitudinal edge 47 of each base plate 41. The front lower edge 48 of each support plate 44 is located intermediate- 1y between the toe 42 and heel 43 of the respective base plate 41 and the rear lower edge 49 of the support plate is located along or near the heel 43. The support plates 44 have their outer ends secured to the side plates 46 and the lower edges secured to the base plates 41. The lower edges of the side plates 46 are secured to the respective base plates along the outer edges thereof with the front edge of each located intermediately between the toe and the front of the U-shaped support plates. The side plates 46 continue rearwardly at 5th past the support plates 44 and each is provided with a stub axle or bolt 51 projected outward sidewise or transversely to support a wheel 52. The plates are all secured together or attached preferably by welding or may be cast together without dcparture from the invention.

The stub axles or bolts 51 are located above the bottom of the base plates 41 a greater distance than the outside radius of the wheels 52 so that the jack may rest on the base plates 41 when in an upright position and being used to raise or lower objects.

An upright channel 53 having a web 54 spacing its flanges 55 is secured to the slidable jack head 20. The web 54 is secured by casting or welding to the front of the jack head 20 and the flanges 55 are projected forward. The top of the web 54 has flanges 55 secured to the upper portion of the slidable jack head 20 and the channel 53 extends downward below the bottom of the slidable jack head 2!) a sufiicient distance to touch the floor or pavement on which the base plates rest when the plate 57' for a modified form of lift means.

slidable jack head 20 is lowered on the jackpost and positioned above the support plates 44.

The flanges 55 of the channel 53 are provided with .holes,=openin g .-or preferably slots 56 aligned in horizontal pairs andspaeed vertically forquiclcmajor adjustment without using thejackihandle.

The lift means or plate '57 is lflat, horizontal .andhas an upright member 58 secured thereto and provided with projected upright ribs'59 preferably arranged to enter beends of :the-ribs to receive the bolt 61 in the upper holes --60 of the ribs-.59 whether the .lift means is upright or inverted. The bolt 61 issufliciently long enough to enter the slots 56 and support the lift member either in an upright or an inverted position. .'A space slug 'Il is secured to the lower portionof channel 53.

Figure 12 illustrates a modified form of the lift :means. The lift means plate 57' is preferablyflat,horizontal and has an upright member 53' secured thereto and is provided withuprightribs or flanges 59' preferably arranged to enter between the flanges S5. .Holes60 are aligned horizontally in the flanges or ribs 59' and are spaced near the ends of the flanges or ribs to receive the bolt 61 in the upper holes 60. A hook 62 is secured to the A gusset plate 63 is secured to plate 57' and uprightmember 58'.

It is obvious that the lift member may be quickly ,changed in elevation by means of the bolt 61 and slots '56 in the channel flanges 55 to facilitate a quick adjustment. The jack may be tilted on the heel thereof to be supported on the wheels 52 for moving about the floor or pavement.

What I claim as new and desire to secure by Letters Patent, is:

A jack; having an upright jack post provided with a perforated Web and a slidable head equipped with operab le climbing pins engageable with the perforated web and operable with a hand lever; comprising: a pair of base plates, said base plates being flat horizontal and elongated, one end of said pair of base plates being designated the toe and the opposite end ofsaid pair of base plates being designated the heel, saidpair of base plates being spaced parallel, a pair'of support plates, each support plate being secured to the ,perforated web of the jack post close to the bottom thereof with the ends of the support plates being extended outward on opposite sides of the jack post, the lower edge of each support plate being secured to a respective base plate, the back portion of each support plate being located transversely on the heel of the respective base plate, a'pair of side plates, the ends of said support'plates being secured to the side plates, said side plates being located on opposite edges of the base plates extended across the ends of the support plates, said sidejplates being extended forward to an intermediate position between thefront toes and the front of the support plates, and each of said side plates having the lower edge thereof secured to the outside edge of the respective base plate.

References Cited'in the file of this patent UNITED STATES PATENTS 1,038,520 Beck Sept. 17, 1912 1,410,380 Daniels Mar. 21, 1922 1,795,391 Hansen Mar. 10, 1931 2,669,424 Branick Feb. 16, 1954 in W l

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