US1485760A - Tail-skid cushion - Google Patents

Description

March 4, 1924; J. G. BERGER TAIL SKID CUSHION Filed April 10. 1922 Patented Mar. 4, 15924.

UNHTED STATES Meant PATENT cranes- .rosnrn e. means, or DAYTON, omo.

TAIL-SKID CUSHION.

Application filed April 10, 1922. Serial No. 551,297.

To all whom itmay concern:

craft.

The object of my invention is to provide a tail-skid'cushioning means which'will be advantageous over the conventional type in that it will be capable of distributing and dissipating sudden impacts by a combination of flexible compression elements operating in horizontal and vertical planes.

To this end it is proposed to provide a rudder post with compression flexible elements and a pivoted actuating rod having one part extending vertically and the other part at an angle thereto and connected to the tail skid by means of compression flexible elements, the tail skid being pivotally connected to an angular extension of the rudder post.

By this construction it will be possible to distribute any impact which may be applied to the tail skid, throughout the triangular support which is of such a construction as to eliminate any tendency to bind or break under a reasonable applied weight or im act.

With the oregoing and other objects in view which shall appear as the description proceeds the invention consist in the novel construction, and combination of parts hereinafter illustrated, described and claimed.

Figure 1 is a vertical section through the rudder post and tail skid and the shock absorbing means applied thereto.

Figure 2 is a cross section of the rudder post taken along line AA of Figure 1,

Referring more particularly to the drawings, 13 represents a hollow cylindrical rudder post to receive a solid upright member- 19. A disc 16 is placed interiorly of the post 13 and welded thereto and is provided with holes to allow guide rods 14 and plunger rod 15 to extend therethrough. A compression coil spring 17 is placed-interme diate of the disc 16 and the upper end of the post 19 and encircling tl1e rod 15. A compression coil spring 18 is placed Intermediate of the disc 16 and the upper end of the post 19 and encircling the rods 14.

A disc 25 is provided with holes to receive rods 14 and 15 and is welded to the rods 14 near their upper extremities. A disc 24 encircles the rod 15 near the upper extremity thereof and is Welded thereto. A compression coil sprin 23 encircles rod 15 and i placed interme iate of and bearing against discs 24 and 25.

The post 13 is provided with a slot 27 of sufficient size to allow free movement of the rod 10 about its pivotal point of con nection to the correspondin rod 13. The rod 10 passes through the taii skid 5 and has a disc 8 welded thereon and a disc 6 adjacent the tail skid 5, a compression coil spring 7 being arranged intermediate therebetween.

On the other side of the tail skid 5 is a disc 4 adjacentthereto and a disc 1 near the outer extremity of the rod 10. A compression coil spring 2 is arranged around a the rod 10 and intermediate of the discs 1 and 4. A compression coil spring 3 is arranged around guide rods 11 and intermediate of the discs 1 and 4. Asuitable retaining member 9 is fixed to the end of the rod 10 for retaining the disc 1 against the action of the springs 2 and 3. The tail skid 5 is pivotally connected at 22 to the right angle extension 21 of the post 19. The post 19 is hollowed out at 26 to receive the rod 15 therein in sliding relation.

Thus u on the receipt of an impact upon the tail skid 5, the latter will rotate about its pivot 22 and compres the coil springs 2 and 3 which rebound, against the spring 7, this operation continuing alternatively.

A similar operation is carried on interiorly of the rudder post, the springs 17 and 18 alternatively compressing and being compressed by the spring 23.

I claim: a 1. In combination with a tail skid for aircraft, a rudder post, said tail skid being disposed at an angle to said rudder post and pivotally connected to an extension thereof, shock absorbing means between the rudder post and said extension and also between said rudder postand said tail skid.

2. In combination with a tail skid for aircraft, a rudder post provided with vertically opposed compressible shock absorbing members, said tail skid being angularly disposed with relation tosaid rudder post and provided on either side thereof with laterally extending compressible shock absorbing members, said lateral and vertical shock absorbers being connected by means of a pivoted rod, and said tail skid being pivot-' ally connected to an extension on the lower portion of said rudder post.

3. A triangulated shock absorber for the tail skid of an aircraft, comprising a rudder post, flexible compressible elements disposed within said rudder post and between same and on either side of said tail skid, said tail skid being angularly disposed to said rudder post and pivotally connected to a lower angle extension of said rudder post.

4. In combination With a tail skid for aircraft, a hollow rudder post, a supporting bar therefor and adapted to slide therein, said supporting bar having a counterbored portion to receive a vertical sliding rod, a disc mounted-interiorly of said rudder-post to receive said vertical sliding rod and a plurality of vertical guide rods, an inner and outer compression coil spring within said rudder post and bearing against said disc and the upper end of said supporting bar, additional upper and lower discs on said guide rods and said sliding rod and guide rods respectively provided with a coming rod being pivotally connected to a lateral 1 extending rod passing through said tail skid, discs on either side of said tail skid, to receive a plurality of compression coil springs, springs disposed concentrically around said lateral rod and retained by means of discs mounted on, said lateral rod.

5. A rudder post, a right angular support therefor, a-tail skid pivotally connected to the laterally extending component part thereof, said rudder post being adapted to encircle and slide vertically on said support, a vertical rod mounted in said rudder post and engaging a 'counterbored portion in said support, a plurality of vertically opposed compression coil springs attached to said rod and adapted to operate against the rebound action of one another upon the receipt of an impact, a laterally extending rod pivoted to said vertical rod and passing through said, tail skid, compression coil springs attached thereto and disposed and bearing against either side of said tail skid, said tail skid being pivotally connected to said rudder' post supporting member.

In testimony whereof I afiix my signature;

JOSEPH Gr. BER-GER.

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