US2240724A

US2240724A - Airplane jack and supporting system

Info

Publication number: US2240724A
Application number: US371125A
Authority: US
Inventors: Rolla G Stoehr
Original assignee: WEAVER Manufacturing Co
Current assignee: WEAVER Manufacturing Co
Priority date: 1940-05-29
Filing date: 1940-12-21
Publication date: 1941-05-06
Anticipated expiration: 1958-05-06

Description

y' 1941 A R. G. STOEHR 2,240,724

AIRPLANE JACK AND SUPPORTING SYSTEM Original Filed May 29, 1940 2Sheets-Sheet 1 INVENTOR; wfiazzaalmzzr May 6, 1941. R. G. STOEHR AIRPLANE JACK AND SUPPORTING SYS TEM 2 Sheets-Sheet 2 Original Filed May 29, 1940 Patented May 6, i941 UNETED sr Es PATENT- ieE 2,240,724. AIRPLANE raox AND SUPPORTING srsrmiu Rolla G. Stoehr, Chatliam, Ontario, Canada, as-

signor to- Weaver Manufacturing Company, Springfield, 111., a corporation of Illinois Original application May 29, 1940, Serial No. 337,763. Divided and this application Decembin-21,1940,SerialNo.371,125

,3 Claims.

This invention relates to means for raising and lowering airplanes and comparable structures and to companion and cooperating means for maintaining .the airplane, or the like, in such elevated servicing and repairing relation, thus allowing the jack-means employed for such lifting to be removed and used elsewhere, it being understood that the reverse of such procedure is resorted to for the lowering of the airplane.

Such invention comprises a. system of devices coasting and conjointly functioning with one another to produce the desired results in a simple, satisfactory and efficient manner by means particularly adapted to perform the stated functions.

To enable those skilled in this art to fully understand the instant invention, present preferred Some airplane-wings are capable of being raised and lowered solely through small, short, downwardly-directed, comically-pointed pins or studs IOI permanently mounted in or on the 1mderside's of the wings, as presented for instance a in Figure 1, and, accordingly, each such wing must be elevated and lowered solely by engagement with its specified stud.

The jack used for this purposeis illustrated in Figures 1, 2, 3 and 4, and it comprises an upright, hydraulic-cylinder a2 mounted on downwardly-diverging legs 503, N3, each fitted with embodiments thereof have been illustrated in the accompanying drawings, forming a part of this specification, and to which reference should be had in connection with the following detailed description, and, for simplicity, like, reference numerals have been employed to designate the some structural parts throughout the several views of the drawings.

In these drawings: a

Figure 1 illustrates a portion only of a win of the airplane in raised position by means of one of the novel wing-jacks;

Figure 2 shows fragmentarily and in vertical section the transfer-member adapted to cooperate either with the jack or with the supportingtrestle;

Figure 3 shows the members presented in Figure 1 in association-with a wing-trestle for transfer of the weight of the wing from the jack to the trestle or the reverse;

Figure 4 is a horizontal sectional view of the interfitted wing-jack and wing-trestle shown in Figure 3 on line 4-4 of Figure 3; Figure 5 illustrates another means for lifting and lowering a wing of an airplane; and

Figure 6 is a vertical cross-section on line 0-6 of Figure 5. v

Assuming that suitable jack-meanshave been provided for raising and lowering the tail and fuselage portions of an airplane, it will be clear that its wings should be elevated and lowered either simultaneouslywith such operation or prior, or subsequent, thereto, it being apparent that ordinarily both wings of the plane should be raised or letdown more or less simultaneously and equally, one only'of the pair of jacks and trestles employed for this purpose being illustrated and described below.

upward extension of the shaft beyond the top end of the plunger is readily and fairly-quickly adjustable to meet different working conditions.

The top end of the shaft is designed to fit in a socket in the under side of a transfer-member I09 having an intermediate, circular, outstanding flange H0 and also having in its upper end a conical-socket III shaped, designed and adapt- 4 ed to receive the stud IOI of the airplane-wing.

Such Jack having been placed beneath the wing of the airplane with its screw-threaded shaft I01 and the member I00 in alignment with the stud I M of the airplane-wing, nut I08 is turned to elevate the shaft causing the end of member. I09 to receive and accommodate the wing-stud.

If need be, or if desirable, the plunger may be forced up by actuation of the handle I 06 to assist in bringing the jack and stud into the specified coactive'reiation.

Then the'jack-handle is operated to force the plunger upwardly to raise the Wing to the needed height. 7

The wing-trestle I00 for supporting the wing after the latter has been thus elevated (Figures 3 and 4), includes four, downwardly-divergent, suitably-braced, automatic-caster-wheelequipped legs H2, H2 sustaining an upper, suitably-shaped, fiat-top supporting-member II3 having an open-side, open-top, open-bottom cavity I I4, the latter being of adequate caliber to receive the upper end of the jack-screw I01 and the lower end portion of member I09, the

cavity also having a demountable or detachable retaining-pin H5 occupying registered, horizon- V of the screw I01 on which such member is mount-'- ed, whereupon the pin H5 is put back in place to prevent accidental displacement of the asso-' ciatedappliances.

Subsequently, the Jack is lowered to transfer member I09 to, and for support on, the wing-tres-' tle and to effect withdrawal of the screw-shaft from the socket of such member, upon the completion of which action the jacl; may he rolled away for other use. I

Obviously, when the mane-wing is to be lowered, the reverse of the above-stated operation is pursued.

In some cases, the airplane-wings are not equipped with such supporting-studs 8M and then a different means is used as indicated in Figures 5 andfi.

Under such circumstances, the screw-shaft of the wing-Jack fits at its top end in a socket in the under side of a member E26 having a round,

outstanding flange its corresponding to the flange lid of member use.

A frame iii is hinged to member 323 at a point l22 about midway the length of the frame, the latter, by means of end-slots therethrough providing a pair of spaced-apart side-walls 523,.1323 with top, marginal, inwardly-directed flanges 52%, E2 3 along the end portions oniy of the frame, the middle section of such frame not being thus slotted.

Each end of the frame isv supplied with a grooved block H25, the opposite grooves of which receive the flanges i2 3, 5243, so that the blocks are adjustable along the frame, and each such slidable member 825 has hinged thereto at its middle at 526 a member or shoe i2l faced with suitable material I28 of a character or type which will not injure the wing i2 of the airplane with which it is adapted to directly contact.

The manner in which the jack and its modified saddle are operated and the procedure by which the support of the wing is transferred to andfrom the wing-trestle Nit will be readily understood from what precedes, it being clear that, by

reason of the hinged mounting of the parts, such saddle will automatically accommodate itself to airplane-wings of different. sizes and varying shapes.

Those acquainted with this art will understand "that the invention is not necessarily limited to the May 29, 1940. v

I claim:

1. In an airplane-wing 'lifting, lowering and supporting system, the combination of transfer-means designed to engage the underside of the airplane-wing, a lifting and lowering lack adapted to carry said transfer-means and to raise and to lower the wing thereby, and a supportingr trestle adapted to be placed in cooperative relation with said transfer-means in its elevated wing-supporting position and to receive and to support said transfer-means upon lowering thereof by said jack, the construction being such that said jack may he removed for other use upon its delivery oisaid transfer-means to said trestle, the reverse of said operations causing the lowering of said wing.

2. The system set forth in claim 1 in which said transfer-means has a sociret in its upper end adapted to receive a downwardly-directed stud on the under side of the airplane wing.

3. The system set forth in claim l in which said transfer-means includes a saddle hinged in.- termediate its ends and adapted to support the airplane-wing from its under side.

4. The system set forth in claim 1 in which said transfer-means has a saddle hinged inter mediate its ends and adapted to support the a plane-wing from its under side, said saddie hear each end thereof having a shoe hinged intermcdh ate its ends to the saddle, said shoes engaging the under-side oi the airplane-wing.

5. The system set forth in claim 1 in which said transfer-meanslhas a socket in its lower portion adapted to detachably receive a part 0 the jack.

6.The system set forth in claim 1 in which said trestle has a side-open recess therein to receive at least a part of said transfer-means.

-7. The system set forth in claim 1 in which said trestle has a side-open recess therein to receive at least a part of said transfer-means, in combination with means to open and clos said side-opening of said recess.

8.-The system set forth in claim 1 in which said transfer-means has an outstanding flange adapted to bear on said trestle to support the airplane-wing thereon.

ROLLA G. STOEHR.