helmet shell

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hel′met shell`

1. a predatory marine gastropod of the family Cassidae, characterized by a thick heavy shell with a broadened outer lip.
2. the shell of this animal, used for making cameos.
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References in periodicals archive ?
Kagaoan said the 13 sacks of seashells consisted of the following: helmet shell, 157 pieces; trumpet shell, four; frog shell, 35; bonnet shell, 10; spider cooch, four; gold lip shell, 44; murex, three; and smooth top shell, 238.
In the case of the helmet shell alone, more than 500,000 kg of problematic thermosetting plastics have not been used by the company as a result of the use of environmentally friendly materials, thus protecting the environment.
The CM735 composite helmet shell has a weight of less than 920 grams while providing ballistic protection against fragments and hand gun rounds.
Another approach has been simply to add padding over the conventional helmet shell to absorb impacts.
They give outstanding performance on the road too, as the unique helmet shell and absorption liner follow the shape and size of the head to prevent lift at speed and give an exceptionally quiet ride.
The foam which is military specification is similar to that between the layers of a helmet shell, and is the key component in reducing the impact of highspeed deliveries directed at the neck, Daily Mail reported.
To address these issues, we created a hybrid: a helmet shell using current technologies fitted with a custom inner liner.
The stylish design incorporates a base 6 curved lens providing close, optimum coverage for the wearer while allowing the lens to be fully retracted into the helmet shell while not in use.
That way you won't accidentally kick it off the EFAB and damage the helmet shell, visors, and the IR harness.
"So we're toying with new shapes where we can smooth out that contour and possibly shape the interior of the helmet shell differently so we can incorporate larger pads if needed," Cole said.