US2377404A - Airplane jack - Google Patents

Description

' June 5, 1945.

Filed sept. 29, 1943,` 2 sheets-sheet 1 June 5, 1945- F. c. QuLLERs 2,377,404

IRPLANE JACK Filed Sept. 29, 1943 2 Sheets-'Shea't 2 Patented June 5, 1945 UNITED STATES PATENT OFFICE- AIRPLANE JACK Floyd C. Cullers, Arcadia, Fla.

Application September 29, 1943, Serial No. 504,307

Claims.

The present invention relates to manually operated trucks adapted for supporting and moving airplanes into a desired location in a factory or hangar and has for an important object to provide jacking means carried by the truck for raising the front end of the airplane and supporting the same while being moved.

A further object is to provide means for simultaneously and'uniformly raising both front landing wheels of the airplane for supporting the same in a balanced position on the truck.

Another object is to provide a device of this character of simple and practical construction, which is strong and durable, efficient and reliable in use, relatively inexpensive to manufacture, and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings, wherein like numerals refer to like parts throughout, and

' in which Figure 1 is a front elevational view,

Figure 2 is a longitudinal sectional View,

Figure 3 is a fragment-ary top plan' view, and

Figures 4, 5 and 6 are sectional views taken respectively on the lines 4 4, 5--5 and 6-6 of Figure 1.

Referring now to the drawings in detail wherein for the purpose of illustration I have disclosed a preferred embodiment of my invention, the numeral '5 designates a frame generally, which is formed of a pair of spaced parallel channel members 6 having their open sides opposed to each other and connected intermediate their ends by a cross member l, arid also connected at their ends by cross members 8 and 9 to the under side of the latter of which are mounted casters or swivel rollers I Il. Braces extend from the outer ends of the cross members 8 and 9 to the upper edges of the frame members B.

An inverted U-shaped post I2 has its ends suitably secured to the outer sides of the frame members 6 and rises from said members with the upper end of the post flattened as shown at I3 and to which is bolted orvotherwise secured a gear housing I4 having a bearing sleeve I5 projecting from one side thereof.

Bevel gears I6 and I1 are positioned in the housing in engaged relation, the gear I6 having a shaft I8 journaled in the sleeve I5 and provided at its outer end with a hand wheel I9. The gear Il is secured on the upper end of a screw which extends downwardly from the and 23 for pivotally attaching anv end of a pair I of lift arms 24 and 25 by pins 2B and 2l. Each of the arms 24 and 25 include telescoping tube sections 28 and 29.

A pair of vslides 30 and 3| extend transversely of the frame and having upstanding flanges 32 and 33- slidably tted in the channels of the frame members 6. lA pair of lugs 34 rise from each slide having a pin 36 on which one of the tubes 29 is pivoted adjacent its outer end.

The end of each tube -29 projects outwardly beyond the end of the frame and is formed with a vertical slot 31 in which is inserted a flat bar 38 having vertically spaced openings 33 for selectively receiving a pin 4|) extending transversely of the tube to secure the bar 38 in vertically adjusted position. On the upper end of the b-ar 38 is a curved head 4| adapted to form a seat for an axle housing4 42 of one of the from; landing wheels 43 of an airplane, the axle housing at each side of the airplane resting' on one of the heads at the outer end of each lift arm. The heads 4| are provided with recesses 4|' to receive lugs (not shown) usually formed on the housings 42 to prevent slipping of the housings from the heads.

Accordingly in the operation of the device, the heads 4I are placed under the axle housings of the landing wheels and by manipulation of the hand wheel I5 in a properdirection the carrier block 2| is moved downwardly causing a lowering movement of the inner ends of the lift arms 24 and 25 and a raising movement of the outer ends of the arms whereby to lift the airplane and support it in an elevated position for transporting the same on the rollers IU. The airplane may thus be easily and quickly moved about on the truck into a desired position in the hangar or factory.

The slides 3D and 3| are adjustable in the channels of the frame to accommodate various types of machines having landing wheels spaced apart at different distances and also to compen sate for variations which may occur in the distances between the wheels resulting from a flat tire.

It is believed the details of construction, operation and advantages of the device will be readily understood from the foregoing without further detailed explanation.

Having thus described my invention, what I claim is:

l. A jack of the class described comprising an elongated Wheel supported frame, a screw rising from the central portion of the frame and rotatably supported thereon, a, carrier block mounted for vertical movement on the screw, a pair of arms pivoted at one end on the block and projecting oppostely therefrom, means pivotally and slidably supporting an intermediate portion of the arms on the frame adjacent the outer ends of the latter, means at the outer ends of the arms adapted to engage and support an object, and means for actuating the screw. y

2. A jack of the class described comprising an elongated Wheel supported frame, a screw rising from the central portion of the frame and rotatably supported thereon, a carrier block mounted for vertical movement on the Screw. a pair of arms pivoted at one end on the block and projecting oppositely therefrom, slides carried by the frame to which the arms are pivoted at intermediate portions, means at the outer ends of the arms Iadmit-eci to engage and support an object, and means for actuating the screw.

3, A jack of the class described comprising an elongated wheel supported drame, a screw rising from the central portion of the frame and rotatably supported thereon, a carrier block mounted for vertical movement on the screw, a pair of arms pivoted at one end on the block and project ing oppositely therefrom, slides carried by the frameto which the arms are pivoted at intermediate portions, means at the outer ends of the arms adapted to engage an'd support an object, and a, hand wheel operatively connected to the screw for actuating the latter.

4. A jack of the class described comprising an elongated wheeled frame formed of a pair of channel members, cross members connecting the channel members in spaced parallel relation with the open side of the channel members arranged in opposed relation, a support rising from the frame, a vertical screw rotatably carried by the support, a carrier block arranged to travel on the screw, a pair of arms pivoted at one end .to the block, slides having end portions positioned in the respective channel members and to which the arms are pivoted adjacent the outer ends of the latter, means at the outer ends of the arms adapted for engaging and supporting an object, and means for manuallyoperating the screw,

5. A jack for lthe landing wheels of an airplane and comprising an elongated frame, a pair of slides on opposite ends of the frame, a pair of lifting arms each including an inner section and a longitudinally slidable outer section pivotally attached to one of the slides with the outer end of said sections adapted for engaging a part of the landing wheels, and operating means for the inner sections of the arms adapted to simultane ously and uniformly actuate the arms.

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