Apparel – Guard or protector – For wearer's head
Patent
1986-08-07
1988-02-16
Rimrodt, Louis K.
Apparel
Guard or protector
For wearer's head
2414, 2421, 2425, A42B 300, A44B 1106, A44B 1116
Patent
active
047245492
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to protective helmets.
FIELD OF THE INVENTION
In general protective helmets comprise a system of support straps forming a cradle arranged to receive the top of a wearer's skull or a foam material lined with a padded liner.
The former type of protective helmet usually has a shell comprising recesses to receive mounting means for the system of support straps.
When the protective helmet is struck, such as in an accident, the mounting means and/or the recesses can strike the skull of the wearer. Furthermore, the system of straps provides very little absorption of force when the protective helmet is struck.
The latter type of protective helmet is usually of a more heavy construction, more costly to manufacture and often not suitable for some applications. Usually such protective helmets are used in motoring such as motor cycle riding and are generally not suited to use in construction work or bicycle riding or the like.
SUMMARY OF THE INVENTION
The present invention provides a protective helmet of relatively light construction and which does not comprise a system of support straps.
In accordance with one aspect of the present invention there is provided a protective helmet, characterised in that it comprises a shell shaped to fit about a head of a wearer, the shell comprising an interior, an exterior, a forward region intended, in use, to be situated adjacent a forehead of the wearer and a rearward region situated at an opposite end of the shell from the forward region, the shell also comprising a basal perimeter, a resilient liner comprising an inner concave side arranged, in use, adjacent the head of the wearer and an outer convex side adjacent the interior of the shell, one or more securing straps attached to the basal perimeter and a locking means to, in use, lockably secure the or each securing strap, the resilient liner being formed by a shaping process so that a plurality of discrete chambers is located within the liner or between the resilient liner and the shell, the resilient liner and the chambers being intended, in use, to absorb mechanical shock imparted to the shell by providing pneumatic and mechanical resilience thereto.
In accordance with a further aspect of the present invention there is provided a locking means characterised in that it comprises a base portion, a shoe portion connected by a hinge means located intermediate of its length to an intermediate location of the base portion, a spring means arranged to fasten about the hinge means to hold and bias the base portion and the shoe portion together, the shoe portion comprising a first recess and the base portion comprising a second recess to be located adjacent the first recess, the second recess being provided to receive a member to be locked and the shoe portion comprising an edge arranged, in use, to engage with the member to be locked to prevent movement of the member out of the second recess.
In accordance with a still further aspect of the present invention there is provided a method of construction of a locking means characterised in that it comprises the steps of placing a shoe portion upon a base portion so that a first recess of the base portion corresponds with a second recess of the shoe portion, fitting a locating means of a second land portion hingedly coupled to a first land portion fixed to the base portion, to a further complementary shaped locating means of the shoe portion so that the base portion and the shoe portion are hingedly fixed together and clippably locating a spring means about the first land portion and the second land portion to bias them together.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a part sectional side elevation of a protective helmet in accordance with the present invention shown with a part of a head of a wearer in it;
FIG. 2 is a front view of a portion of a securing strap of the protective helmet of FIG. 1;
FIG. 3a is a part sectional fr
REFERENCES:
patent: 3790962 (1974-02-01), Plastino
patent: 4307471 (1981-12-01), Louell
patent: 4472472 (1984-09-01), Schultz
patent: 4519099 (1985-05-01), Kamiya et al.
patent: 4588470 (1985-12-01), Mitchell et al.
Herder Jaime
Merralls Stephen R.
Airsorb Pty. Ltd.
Rimrodt Louis K.
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