US3556457A

US3556457A - Holddown anchor for airplanes and other structures

Info

Publication number: US3556457A
Application number: US786624A
Authority: US
Inventors: Henry A Patnaude
Original assignee: Individual
Current assignee: Individual
Priority date: 1968-12-24
Filing date: 1968-12-24
Publication date: 1971-01-19
Anticipated expiration: 1988-01-19

Abstract

A plurality of anchor units are employed attached to guide lines secured to an airplane or other structure. Each holddown unit includes a base imbedded in concrete and a holddown device having a lower shank insertable into and adapted to be locked to the base and having an inverted frustoconical upper end provided therein with a hook integral with the holddown device and around which holddown lines are adapted to extend.

Description

United States Patent lnventor Henry A. Patnaude 831 Los Molinos Way, Sacramento, Calif. 95825 Appl. No. 786,624

Filed Dec. 24, 1968 Patented Jan. 19, 1971 HOLDDOWN ANCHOR FOR AIRPLANES AND OTHER STRUCTURES 4 Claims, 13 Drawing Figs.

US. Cl 248/361, 24/129: 105/369 Int. Cl F16b 5/07 Field of Search 248/361,

361A, 1 19; 24/129; 280/1791; 105/369A, 368T Primary Examiner-Chancellor E. Harris Attorney-Alexander B. Blair ABSTRACT: A plurality of anchor units are employed attached to guide lines secured to an airplane or other structure.

Each holddown unit includes a base imbedded in concrete and a holddown device having a lower shank insertable into and adapted to be locked to the base and having an inverted frustoconical upper end provided therein with a hook integral with the holddown device and around which holddown lines are adapted to extend.

Z6 H III II I 36 ,0 [2 "III 2 I r l 1 (I l /6 H i :32

HOLDDOWN ANCHOR FOR AIRPLANES AND OTHER STRUCTURES CROSS-REFERENCE TO PRIOR. PATENT Reference is, made to my prior US. Pat. No. 3,414,226 issued Dec. 3, I968 which shows an anchor structure for holding covers on swimming pools, the device being flush with a concrete surface around the swimming pool and having a separable hook fixed therein and around which ropes or cables are adapted to pass to secure a swimming pool cover in position.

SUMMARY OF THE INVENTION The device includes a base adapted to be set in concrete flush therewith and having a central opening therethrough. A holddown device is provided with a vertical lower shank insertable in the opening in the base and having a noncircular portion adapted to be turned after the shank is inserted in the base to lock the holddown device against upward movement. A collar splined on the shank is provided with locking lugs movable downwardly intorecesses in the base to prevent turning movement of the shank. Thus the holddown device is fixed against both vertical and turning movement.

The upper end of the shank is provided with a hollow inverted frustoconical body having an integral hook therein around which may be passed loops of ropes or cables attached to an airplane or other structure to prevent damage to the latter by heavy wind. Displacement of a cable loop is prevented by a top plate partially covering the open top of the frustoconical body, and this cover may be hinged to swing upwardly or which may be fixed in position adjacent and relative to the hook.

BRIEF DESCRIPTION OF THE. DRAWING FIG. 1 is a fragmentary plan view of a concrete apron or runway showing one of the devices in position with anchoring cables connected thereto;

FIG. 2 is a plan view of one of the anchoring units;

FIG. 3 is a side elevation of the same;

FIG. 4 is a section on line 44 of FIG. 3;

FIG. 5 is a section on line 5-5 of FIG. 3, parts being shown in elevation; I 4

FIG. 6 is a section on line 6-6 of FIG; 2;

FIG. 7 is a transverse sectional view through the shank of the upper anchoring device;

FIG. 8 is a plan view of a modified form of the device;

FIG. 9 is a section on line 9-9 of FIG. 8;

FIG. 10 is a plan view of another modification of the device;

FIG. 11 is a section on line 11-11 of FIG. 10;

FIG. 12 is a plan view of a further modification; and

FIG. 13 is a section on line 13-13 of FIG. 12.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 7, inclusive, the numeral 10 designates the base of a holddown unit as a whole comprising a top circular plate 12 having cutouts l3 and provided with a lower cylindrical portion 14 above which the base 10 is annularly cut away as at 16 for a purpose to be described. The base plate 12 is provided with a central opening 18 (FIG. 4). Op-

s'uies of this opening are flattened as at 20 while the r of the opening is of circular form.

A holddown device indicated by the numeral 24 is provided with a depending shank 26 adapted to be inserted through the opening 18 and downwardly through the cylindrical sleeve 14. The shank 26 is provided with a flange 28 (FIG. 6) having opposite semicircular portions 30 and flat intervening sides 32. The flange 28 thus is of a shape to slide downwardly through the opening 18 when the flat sides 32 of the flange are aligned with the flat sides 20 of the opening 18. Thus the flange 28 is adapted to be received in the circular cutaway I6 and upon rotation of the shank 26 through 90", the projecting flange portions 30 will be arranged beneath the sides of the opening 18 reduced by the flat sides 20, thus preventing vertical movement of the shank 26.

Above the flange 28 the shank 26 is provided with a collar 34 shrunk on the shank 26 as at 36. The collar 34 may be provided at opposite sides thereof with depending lugs 38.

At its upper end, the shank 26 is provided with a hollow, inverted frustoconical head 40 provided at its upper end with an annular flange 42 forming in the head 40a shoulder 43. Within the head 40and cast integral therewith is a hook 44 around which may extend loops 46 (FIG. I) of guide lines or cables 47.

Cover means is provided for the hook 44. Referring to FIGS. 2 and 5, a plate 48 rests upon theshoulder 43 and is attached to the head 40 by screws or other fastening elements 50. The plate 48 is provided with a rectangular notch 52 (FIG. 2) in which is arranged a lug 54 integral with a cover plate 56 hinged to the plate 48 as at 58. It will be noted in FIG. 5 that the hook 44 is provided with an upwardly extending portion 59 flush with the top of the flange 42. When the cover 56 is closed, its top surface is also flush with the top of the flange 42 and with the top of the plate 48. Thus, there are no projections extending above the head 40. The cover 56, in closed position, rests directly upon the hook 44. I

A modified type of the device-is shown in FIGS. 8 and 9 wherein similar parts are indicated by the same reference characters. The plate 48 is used also in this form of the invention and has pivoted thereto as at 58 a cover 60 which is cut back centrally thereof as at 62 (FIG. 8) to lie adjacent a hook 64, integral with the head 40 but arranged higher than the hook 44 previously described, the hook 64 having its upper surface 66 flush with the top of the cover 60 when the latter is inclosed position.

A further modified form of the invention is shown in FIGS. 10 and 11 wherein the parts may be identical with the form of the invention shown in FIGS. 2 to 5, inclusive, except that the cover is in a form of unitary plate 68 fixed by screws or the like 70 to the head 40, there being no hinge employed. One of the hooks 44 will be employed and this hook is shouldered as at 72 to lie in proximity to the adjacent edge 74 of the plate 68. In this case the screws 70 will be removed and the plate 68 lifted from position for attaching the cable'loops 46 to the hook 44.

In FIGS. 12 and 13, another modification is shown wherein a cover 76 is hinged as at 77 to a plate 48, such as is shown in FIG. 5. In this case, the cover plate 76 is provided with a screw 78 for rigidly fixing the cover 76 to the hook 44. Thus the cover 76 in use will be fixed to the hook 44 and can be swung upwardly only by removing the screw 78.

The anchoring device 24 is used alone or in combination with the base 10, dependent upon the material of the apron or runway in which the device is used. If the device is to be set in concrete, the base 10 will not be used since the anchoring device 26 will be effectively held in position in the concrete. The top of the device is also flush with the surface, it being noted that all of the elements at the top of the device, such as the hook 44, flange 42 and the various cover devices and their top surfaces are in a common plane. Thus, vehicles can run over the top of the device without injury to the device or to the vehicle. When thus used in concrete, the flange 28 will be firmly imbedded in concrete, and the same is true of the flange 34. These flanges effectively anchor the device against any movement. The use of lugs 38 is preferred since they afford positive assurance against any turning movement of the device on its axis. I

When the device is used with other paving materials, for ex ample, asphalt, the base 10 is preferably employed. The reason for this obviously is because asphalt and other paving materials do not have the hardness and structural strength or movement relative to the base 10. The entire structure will be buried in the paving material with the top surface of the anchoring device 24 again flush with the surface of the paving. The paving material will flow beneath the flange 34 and beneath the plate 12 of the base and through the cutouts 13, and some of the material beneath the base plate 12 will find its way into the recess 16 and firmly anchor the holddown device 24 against rotary movement.

Attention is also invited to the fact that the anchoring device may terminate on the bottom line of the frustoconical head 40, in which case the device can be welded to steel railings or the deck of a ship. In all cases, of course, the hook 841 is formed integral with the head 40 and has a top surface in the plane of the edge of the flange 42 and whichever type of cover plate is employed, such cover plate extends into close proximity to the hook (FIG. 8) or overhangs and seats upon a portion of the hook (FIGS. 5, I0 and 12).

The form of the device which will be used in concrete in the manner described above is shown in FIG. 12. It will be apparent, of course, that the anchoring device per se of any form of the invention may be so used.

The

covers

56, 60 and 76 are adapted to swing upwardly for the attachment of the cable loops 46 to the

hook

44 or 64, whereupon the hinged cover may be closed. In the form of the invention shown in FIGS. 12 and 13, the screws 78 will be inserted and tightened to fix the cover plate 76 to the hook 44.

In FIG. 10 the cover plate 68 must be bodily removed by removing the screws 70. The plate and its screws are reconnected to the head 40 after the cable loops have been attached to the hook 44.

The relatively heavy formation of the structure, including the integral formation of the cable hook with the body 40,

makes the whole structure particularly rugged and adapted to tect airplanes from damage due to heavy winds.

From the foregoing it will now be seen that there is herein provided an improved holddown anchor for airplanes and other structures which accomplishes all of the objects of this invention and others, including many advantages of great practical utility and commercial importance.

As various embodiments may be made of this inventive concept, and as many modifications may be made in the embodiments hereinbefore shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative, and not in a limiting sense. I

I claim:

1. A holddown unit comprising: an open-topped frustoconical head; a hook wholly within said head integral therewith and having an upper surface flush with the top of said head; a plate partially covering the top of said head and flush with the top surface thereof, said plate being cut away at one side for the passage of a cable element downwardly around said hook; said plate being pivoted at the side of said head opposite said hook to swing upwardly therefrom; said plate having its portion adjacent said hook in close proximity thereto; said hook being cut away adjacent the end thereof, and said plate adjacent said hook overlying said cutaway in contact with said hook.

2. A device according to claim I provided with a fastening element securing said overlying portion of said plate to said hook.

3. A holddown unit comprising an open-topped frustoconical head; a hook wholly within said head integral therewith and having an upper surface flush with the top of said head; a

plate partiallyl covering the top of said head and flush with the top surface t ereof; said plate being cut away at one side for the passage of a cable element downwardly around said hook; said plate being removably mounted at the side of said head opposite said hook; said plate having its portion adjacent said hook in close proximity thereto; said hook being cut away adjacent the end thereof; and said plate adjacent said hook overlying said cutaway in contact with said hook.

4. A device according to claim 3 provided with a fastening element securing said overlying portion of said plate to said hook.

Claims

2. A device according to claim 1 provided with a fastening element securing said overlying portion of said plate to said hook.

3. A holddown unit comprising an open-topped frustoconical head; a hook wholly within said head integral therewith and having an upper surface flush with the top of said head; a plate partially covering the top of said head and flush with the top surface thereof; said plate being cut away at one side for the passage of a cable element downwardly around said hook; said plate being removably mounted at the side of said head opposite said hook; said plate having its portion adjacent said hook in close proximity thereto; said hook being cut away adjacent the end thereof; and said plate adjacent said hook overlying said cutaway in contact with said hook.