Source: http://www.google.com/patents/US7861657?dq=7,346,539
Timestamp: 2016-07-30 17:45:58
Document Index: 565955761

Matched Legal Cases: ['art 61', 'art 63', 'art 63', 'art 61', 'art 61', 'art 63', 'art 61', 'art 63', 'arts 61', 'arts 61', 'arts 101']

Patent US7861657 - Non-lethal projectile - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA projectile is provided for use in a non-lethal weapon system. The projectile having kinetic energy is launched substantially along the longitudinal axis in the direction of a target. Upon impact of the projectile with the target an elastic mechanism absorbs elastically a first portion of the kinetic...http://www.google.com/patents/US7861657?utm_source=gb-gplus-sharePatent US7861657 - Non-lethal projectileAdvanced Patent SearchPublication numberUS7861657 B2Publication typeGrantApplication numberUS 12/059,064Publication dateJan 4, 2011Filing dateMar 31, 2008Priority dateApr 1, 2007Fee statusPaidAlso published asCN101669008A, EP2137484A2, EP2137484A4, EP2137484B1, US8061276, US20080236435, US20110061557, WO2008120210A2, WO2008120210A3, WO2008120210A4Publication number059064, 12059064, US 7861657 B2, US 7861657B2, US-B2-7861657, US7861657 B2, US7861657B2InventorsHaim Danon, Ilan ShalevOriginal AssigneeSDI - Security Device International, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (16), Referenced by (10), Classifications (11), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetNon-lethal projectile
US 7861657 B2Abstract
A projectile is provided for use in a non-lethal weapon system. The projectile having kinetic energy is launched substantially along the longitudinal axis in the direction of a target. Upon impact of the projectile with the target an elastic mechanism absorbs elastically a first portion of the kinetic energy. A locking mechanism stores the first portion of the kinetic energy within the elastic mechanism; whereby the remaining kinetic energy of the impact is reduced to a non-lethal level of the target. The projectile preferably includes a deformable head attached to the first body. The deformable head is formed from a viscoelastic material which manifests both the elastic mechanism (with the elastic mechanical properties of the viscoelastic material) and further manifests the locking mechanism with the viscous properties of the viscoelastic material.
(a) a main body with a longitudinal axis;
(b) a deformable head formed at least in part of a viscoelastic material, said deformable head operatively attached to said main body, wherein the projectile is adapted for having a kinetic energy and for being launched substantially along said longitudinal axis in the direction of a target, and upon impact of the projectile with a target, wherein said deformable head is adapted to deform viscoelastically to increase contact area of said deformable head on said target, to viscously dissipate a first portion of said kinetic energy, to absorb elastically a second portion of said kinetic energy, and to reduce the remaining kinetic energy of said projectile on impact with said target;
(c) a semi-rigid element, including at least two segments connected by at least one foldable portion thereof, wherein said semi-rigid element supports at least in part said deformable head and wherein said semi-rigid element is attached to said main body; and upon impact of the projectile with said target, said at least one foldable portion folds outward in response to said impact.
2. The projectile according to claim 1, further comprising:
(d) a second body with said longitudinal axis, said second body including a hollow, wherein a portion of said first body fits marginally within said hollow; and during said impact said first body is forced into said hollow, deforming at least one of said first body or said second body to absorb a third portion of said kinetic energy.
3. The projectile according to claim 1, further comprising:
(e) an air gap disposed between said semi-rigid element and said main body.
4. The projectile according to claim 1, further comprising:
(e) a soft material disposed between said semi-rigid element and said deformable head.
5. The projectile according to claim 1, further comprising:
(e) a plurality of longitudinal members, attached to said main body and embedded within said deformable head, said longitudinal members pointing towards said target, wherein upon said impact said longitudinal members pierce said target and are bent outward away from said longitudinal axis.
6. The projectile according to claim 5, wherein said longitudinal members are made of metal or rigid plastic.
7. The projectile, according to claim 5, wherein said longitudinal members include at least one barbed end which upon impact pierces and attaches to said target.
8. The projectile, according to claim 1, wherein said deformable head is formed at least in part from a silicone rubber polymer raw material. Description
The present application claims the benefit of U.S. provisional application 60/909,461 filed on Apr. 1, 2007, by the present Applicants, the disclosure of which is included herein by reference.
In preferred embodiments of the present invention, the material of deformable head 13 is viscoelastic and responds both viscously like putty and elastically like rubber
Reference is now made to FIG. 6, a side view in cross section of a non-lethal projectile 60, according to an embodiment of the present invention. FIG. 6A illustrates non-lethal projectile 60A prior to impact and FIG. 6B illustrates non-lethal projectile 90B after impact. Projectile 60 includes two main bodies 61 and 63 in which 61 is hollow and 63 fits inside only when bodies 61 and 63 elastically and/or plastically strained radially (perpendicular to the longitudinal axis LA). The head of non-lethal projectile 60 is not shown in FIG. 6. Non-lethal projectile preferably includes one or more embodiments (10, 20, 30, 40, 50) of deformable head or otherwise a conventional head. Non-lethal projectile 60 is launched in the direction of the arrow along longitudinal axis LA. On impact with target 11, body 61 is forced into body 63 by the force of the impact and the overall length (along axis LA) is reduced on impact. The more massive of bodies 61 and 63 is preferably in the rear, in this case body 61 is in the rear in non-lethal projectile 60. According to a preferred embodiment of the present invention bodies 61 and 63 are configured with interlocking toothed ridges 65 and 67. (see detail) herein referred to simply as “teeth”. The ridges are formed on the inside diameter face of part 61 and on the outside diameter face of part 63 As seen in Detail, the outside diameter of part 63 is larger than the inside diameter of part 61 Also as seen best in Detail A, the teeth are preferably configured with a single sloped face and a substantially perpendicular face such that the sloped faces of the teeth of part 61 engage the sloped faces of the teeth of part 63. Therefore, as the two parts are forced together upon impact, the geometry of the teeth forces the diameter of part 61 to increase and the diameter of part 63 to decrease and thereby create radial stress. After parts 61 and 63 have reached their maximum deformation while passing over the raised teeth, they fall radially into the valley between the teeth without inducing any axial force. As the teeth fall into corresponding valleys, the perpendicular faces prevent any axial expansion of the two parts in the direction of longitudinal axis LA, and lock parts 61 and 63 in place. Friction between toothed ridges 65,67 absorb part of the kinetic energy.
Reference is now made to FIG. 10 which illustrates a side view in cross section of projectile 100, according to an embodiment of the present invention which is a variation of projectile 90. Two bodies 101 and 105 of projectile 100 are shown. The head of non-lethal projectile 90 is not shown in FIG. 10. Non-lethal projectile 100 preferably includes one or more embodiments (10, 20, 30, 40, 50) of deformable head or otherwise a conventional head. A spring element 105 is assembled between parts 101 and 105. Body 101 is hollow and optionally body 105 marginally fits into 101 only when bodies 101 and 105 are elastically strained radially (perpendicular to the longitudinal axis LA) Non-lethal projectile 100 is launched in the direction of the arrow along longitudinal axis LA. On impact with target 11, body 105 is forced into body 101 by the force of the impact and the overall length (along longitudinal axis LA) is reduced on impact. The more massive of bodies 105 and 101 is preferably in the rear, in this case body 61 is in the rear in non-lethal projectile 90. According to a preferred embodiment of the present invention bodies 105 and 101 are configured with interlocking toothed ridges 65 and 67. A spring element 103 is assembled between bodies 101 and 105. During impact of projectile 100, some of the kinetic energy of projectile 100 is stored in spring element 103 because of the forward inertia of body 101. When a locking mechanism, e.g. toothed ridges, is applied then spring element 103 does not relax after compression on impact because of the action of the locking mechanism. Otherwise, if the locking mechanism is not applied, a portion of the energy stored in spring 103, transfers more energy to target 11 by pushing bodies 101,105.
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