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Publication numberUS3736838 A
Publication typeGrant
Publication dateJun 5, 1973
Filing dateDec 16, 1970
Priority dateDec 18, 1969
Also published asDE1963405A1
Publication numberUS 3736838 A, US 3736838A, US-A-3736838, US3736838 A, US3736838A
InventorsBromsen W, Butterweck A
Original AssigneeHoesch Ag
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Protective shielding
US 3736838 A
Abstract
A protective shield of steel, especially for chains of armored cars and tanks, which comprises steel plate means each having a plurality of groups of holes with the holes of each group so arranged that the vertical projection of the connecting lines of their central axes defines a quadrangle while a fifth hole has its axis passing through the point of intersection of the diagonals of said quadrangle, rubber means surrounding said steel plate means.
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Description  (OCR text may contain errors)

United States Patent 1 Butterweck et al.

[ 51 June 5, 1973 [541 PROTECTIVE SHIELDING {75} lnventors: ArturButterweck, Hagen; Wilhelm Bromsen, Berchum, both of Germany [73] Assignee: Hoesch Aktiengesellschaft, Dortmund, Germany [22] Filed: Dec. 16, 1970 [21] Appl. No.: 98,628

, 30] 7, Foreign Application Priority Data Dec. 18,1969 Germany..., ..P 19 63 405.0

[52] U.S. Cl. ..89/36 A, 89/36 H, 109/83, 161/404 [51] Int. Cl. ..F41h 5/04, F41h 7/04 [58] Field of Search ..89/36 A; l09/49.5, 109/78, 80, 82, 83; 161/114, 221, 404

[56] References Cited UNlTED STATES PATENTS 3,507,739 4/1970 Jacobs ..161/114 2,279,110 Collins ..161/221 FOREIGN PATENTS OR APPLICATIONS France .89/36 A Great Britain ..161/114 Primary ExaminerStephen C. Bentley Att0rneyWalter Becker 5? ABSTRACT A protective shield of steel, especially for chains of armored cars and tanks, which" comprises steel plate means each having a plurality of groups of holes with the holes of each group so arranged that the vertical projection of the connecting lines of their central axes defines a quadrangle while a fifth hole has its axis passing through the point of intersection of the diagonals of said quadrangle, rubber means surrounding said steel plate means.

2 Claims, 4 Drawing Figures PROTECTIVE SHIELDING The present invention concerns a protective shield make up of a steel plate with holes therein and with a frame of rubber material.

Protective or chain shields or aprons for vehicles have become known which consist of plates with holes therein and a coating of rubber material. With such heretofore known shields, holes are arranged in rows above each other and adjacent to each other, while said holes are arranged in a quadrangle. The spacing between holes of such heretofore known shields is relatively great at the short side of the quadrangle so that the desired optimum reduction in weight of the total shield is not realized. Moreover, this heretofore known shield is suitable only for a certain vehicle type because otherwise the advantages obtained by the reduction in weight are lost again.

It is an object of the present invention to provide a protective shield of the above mentioned type which will permit a considerable saving in weight and which simultaneously will yield an increased safety against projectiles, especially with hard core ammunition.

It is a further object of this invention to provide a protective shield, as set forth in the preceding paragraph, which will greatly simplify the stock keeping and replacement of such protective shields.

These objects and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawings, in which:

FIG. 1 is a cutout of a protective shield showing a single group of five holes arranged in conformity with the present invention.

FIG. 2 shows a portion of a protective shield according to the invention with a plurality of groups of holes.

FIG. 3 illustrates a side view of a protective shield according to the invention.

FIG. 4 represents a section taken along the line IVIV of FIG. 3, but on a larger scale than the latter.

The protective shield according to the present invention which comprises a perforated steel plate surrounded by a rubber layer or rubber frame is characterized primarily in that the perforation consists of four holes arranged relative to each other in such a way as to define a quadrangle while an additional hole, preferably of the same size as the remaining holes is located at the point of intersection of the diagonals of said quadrangle.

According to a preferred embodiment of the invention, the quadrangle has the shape of a rectangle while the distance a between two adjacent holes in said rectangle at the shorter side of the rectangle is at a maximum two-thirds of the spacing b between two adjacent holes along the longitudinal side of the rectangle. An optimum will be obtained when the spacing of the centers of two adjacent holes at the short side of the rectangle amounts to approximately millimeters. Expediently, the spacing of a marginal hole from the edge of the plate or shield amounts to a/2. Finally, the group of holes comprising the corner holes of a rectangle or quadrangle and the center hole is spaced from the next adjacent group of holes by a distance which does not exceed, and expediently equals the distance between the holes in the group of holes.

Referring now to the drawings in detail, and FIGS. 1 and 2 thereof in particular, it will be noted that a group of holes according to the invention comprises four holes 1 arranged so that the connecting lines of their centers define a rectangle while at the point of intersection of the diagonals 2 of said rectangle there is provided a fifth hole 3 having the same diameter as the holes 1. The spacing a between the holes at the short side of the rectangle amounts to a maximum of twothirds of the spacing b between the holes at the longitu dinal side of the rectangle.

FIG. 2 shows the arrangement of a plurality of groups of holes in a metal plate 4 for a protective shield according to the invention. The group of holes comprising the comer holes 1 and the center hole 3 is spaced by a distance b and a respectively from the next group of holes, said spacings a and b being the same as the spacing a and b between corresponding holes of one and the same group of holes. The spacing of a marginal hole, for instance, the hole 1a from the margin M of the plate 4 amounts to a/2.

A portion of the protective shield as it is used, for instance,for protecting the chain of tanks and armored cars is illustrated in FIG. 3. The part 7 is composed of plates 4 which are inserted in a rubber frame 6 or in rubber strips 6 and are interconnected thereby.

As will be seen from the above, the advantage of the novel protective shield according to the invention are seen primarily in that due to the greater number of holes and in view of the specific arrangement of the holes, a considerable saving in weight amounting to from 10 to 15 has been realized. At the same time, with the reduced overall weight of the protective chain shield, a uniform ballistic safety or with the same overall weight of the protective chain shield, a higher ballistic safety against projectiles, especially with hard core ammunition, is realized. In addition thereto, the stock keeping of the protective shields composed of a plurality of identical parts is greatly simplified so that also the repair work will be facilitated and speeded up.

It is, of course, to be understood that the present invention is by no means limited to the particular showing in the drawings, but also comprises any modifica' tions within the scope of the appended claims.

What we claim is:

l. A protective shield of steel, especially for chains of armored cars and tanks, which comprises steel plate means including a plurality of substantially identical steel plates of rectangular shape and each having a plurality of groups of holes, each of said groups of holes comprising four holes arranged so that the vertical projection of the connecting lines of their central axes define a quadrangle that is a rectangle in which the spacing between the two holes along the short side of the rectangle does not exceed two-thirds of the spacing between the two holes along the side of said rectangle, those holes which are closest to the edge of said shield being spaced therefrom by a distance approximately one-half the distance between two adjacent holes along the short side of the rectangle, the spacing between adjacent groups not exceeding the maximum spacing between two adjacent holes in said groups, and also comprising a fifth hole having its axis pass through the point of intersection of the diagonals of said quadrangle, and rubber means encasing said steel plate means with said steel plates being arranged in said rubber means in horizontal and vertical rows.

2. A protective shield according to claim 1, in which in each group of holes the spacing between the two holes along the short side of the rectangle is approximately 20 millimeters.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2279110 *Nov 22, 1937Apr 7, 1942Edmund Quincy MosesArmor plate
US3507739 *Dec 5, 1966Apr 21, 1970Ja Bar Silicone CorpPlaten
FR909792A * Title not available
GB867782A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4835033 *Mar 1, 1988May 30, 1989General Dynamics Land Systems, Inc.Armor plate having triangular holes
US4850260 *Dec 24, 1987Jul 25, 1989United States Of America As Represented By The Secretary Of The ArmyApparatus for reduction of munition fratricide hazard
US4857119 *Mar 1, 1988Aug 15, 1989General Dynamics Lands Systems, Inc.Case-Hardened plate armor and method of making
US4911061 *Mar 22, 1989Mar 27, 1990General Dynamics Land Systems, Inc.Composite ceramic armor and method for making same
US4981067 *Sep 18, 1989Jan 1, 1991The United States Of America As Represented By The Secretary Of The ArmyReactived armor improvement
US5014593 *Oct 18, 1989May 14, 1991General Dynamics Land Systems, Inc.Perforated plate armor
US5803212 *Sep 17, 1993Sep 8, 1998Hoesch AktiengesellschaftGrating system
US6345563 *Jun 30, 2000Feb 12, 2002United Defense, L.P.Reactive pill armor
US6405630 *Nov 3, 2000Jun 18, 2002The United States Of America As Reresented By The Secretary Of The ArmyForaminous ballistic grill
US7191694 *May 7, 2004Mar 20, 2007United States Of America As Represented By The Secretary Of The ArmyEdge reinforced brittle armor system
US7343843Jan 26, 2005Mar 18, 2008Blast Gard InternationalExplosive effect mitigated containers and enclosing devices
US7520223Apr 29, 2004Apr 21, 2009Blastgard Technologies, Inc.Explosive effect mitigated containers
US8316752 *Jul 31, 2003Nov 27, 2012Blastgard Technologies, Inc.Acoustic shock wave attenuating assembly
US8375841 *Jun 15, 2011Feb 19, 2013Industrie Bitossi, S.p.A.Armor tile
US8424443 *Jan 31, 2011Apr 23, 2013The United States Of America As Represented By The Secretary Of The ArmyVented armor V structure
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US20050188825 *Apr 29, 2004Sep 1, 2005Blast Gard InternationalExplosive effect mitigated containers
US20050242093 *Jan 26, 2005Nov 3, 2005Blast Gard InternationalExplosive effect mitigated containers and enclosing devices
US20070006723 *Jul 31, 2003Jan 11, 2007Waddell John L JrAcoustic shock wave attenuating assembly
US20090098404 *Oct 15, 2008Apr 16, 2009Honda Motor Co., Ltd.System for forming holes in metal sheet
US20120067200 *Jun 15, 2011Mar 22, 2012Plasan Sasa Ltd.Armor tile
US20120192706 *Jan 31, 2011Aug 2, 2012The United States Of America As Represented By The Secretary Of The ArmyVented Armor V Structure
US20130160640 *Sep 2, 2011Jun 27, 2013Bae Systems PlcArmour assembly
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WO2014097327A1 *Dec 18, 2012Jun 26, 2014B-Max S.R.L.Protective device
Classifications
U.S. Classification89/36.2, 109/83, 89/36.8
International ClassificationB62D55/08, F41H5/02, B62D55/084, F41H5/00, F41H5/04
Cooperative ClassificationF41H5/0457, F41H5/023, B62D55/0845, F41H5/02
European ClassificationF41H5/02B, B62D55/084C, F41H5/02, F41H5/04D4