Apparel – Guard or protector – For wearer's head
Reexamination Certificate
2003-05-12
2004-01-06
Lindsey, Rodney M. (Department: 3765)
Apparel
Guard or protector
For wearer's head
C002S412000
Reexamination Certificate
active
06671889
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention pertains to personnel-protective (blunt object impact and noise suppression) helmet shell construction, and in particular, to such a shell wherein inner and outer, load-bearing, semi-rigid structural layers in the shell are formed/fabricated by the process of vapor-suspension, material-spray deposition. Preferably employed for such a structural spray is a two-component, polyurea/polyurethane spray elastomer system, such as the component system known as HYDROTHANE made and sold by Hydroseal Polymers, Inc. of Riverside, Calif. The two components making up this product are isocyanate and polyol. We have discovered that this commercially available system, which is focusedly designed to create protective coatings over other objects, can itself be employed to form independent structural objects per se. This discovery opens the door to the moldless creation of many different kinds of structural objects, such as the helmet shell structure which is particularly disclosed and illustrated herein.
This spray material, appropriately prepared for spraying as a particle vapor-suspension, includes particles having a strong bonding affinity for one another upon contact. Contacting particles agglomerate after landing with one another to form, progressively, a solid, semi-rigid, load-bearing structure. The “exposed” surface of this forming structure has an infinitely and subtlety selectable and controllable topography, dictated principally by how much material is sprayed, and how the forming spray is aimed and maneuvered, during the spraying procedure.
Proposed by the invention is a novel multilayer (especially three-layer), personnel-protective helmet shell construction wherein a central (or core) layer is formed of a suitable shock-absorbing (and also sound-deadening) soft, viscoelastic, microcellular foam layer, jacketed on its inner and outer surfaces by sprayed-formed, more rigid (semi-rigid) layers of a vapor-suspension, structural deposition plastic material. As will become apparent, the invention features a structural helmet which is uniquely derived from a bonding-affinity agglomeration of structurally interactive, initially vapor-suspension particles cooperatively united via a simple, quick, precise, inexpensive and reliably repeatable manufacturing practice that offers a number of significant functional advantages, and attractive fabrication economies, in relation to conventional, molded, helmet-shell practices. The resulting helmet shell of the invention, because of the mechanically interactive cooperation that results from the spray associated agglomerated particles just mentioned, offers robust, high-level load-distribution and blunt-object-impact cushioning performance, as well as noise suppression.
REFERENCES:
patent: 2140716 (1938-12-01), Pryale
patent: 2378642 (1945-06-01), Kopplin
patent: 3018210 (1962-01-01), Frieder et al.
patent: 3444288 (1969-05-01), Mead
patent: 3501772 (1970-03-01), Wyckoff
patent: 3770483 (1973-11-01), Komine
patent: 3935044 (1976-01-01), Daly
patent: 3946441 (1976-03-01), Johnson
patent: 4008949 (1977-02-01), Luna
patent: 4020507 (1977-05-01), Morton
patent: 4075717 (1978-02-01), Lemelson
patent: 4136226 (1979-01-01), Gilman
patent: 4279038 (1981-07-01), Bruckner et al.
patent: 4845786 (1989-07-01), Chiarella
patent: 4874640 (1989-10-01), Donzis
patent: 4993076 (1991-02-01), Dierickx
patent: 5177815 (1993-01-01), Andujar
patent: 5424021 (1995-06-01), Nakade et al.
patent: 5713082 (1998-02-01), Bassette et al.
patent: 5790988 (1998-08-01), Guadagnino, Jr. et al.
patent: 6108825 (2000-08-01), Bell et al.
patent: 6374422 (2002-04-01), Gonzalez et al.
patent: 6425141 (2002-07-01), Ewing et al.
patent: 6446270 (2002-09-01), Durr
patent: 6467099 (2002-10-01), Dennis et al.
patent: 6536052 (2003-03-01), Tao et al.
Dennis Michael R.
Monk Russell A.
Dickinson, P.C. Jon M.
Lindsey Rodney M.
Varitz, P.C. Robert D.
LandOfFree
Multi-layer, personnel-protective helmet shell with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-layer, personnel-protective helmet shell with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-layer, personnel-protective helmet shell with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3225208