Noise attenuator attachment arm
First Claim
1. A sprung attachment arm for a sound attenuating device forming part of a head stirrup or adapted to be fitted to a protective helmet, said arm (2) being adapted at one end thereof for attachment to a protective ear muff (4), wherein the arm has an elongate, straplike configuration along at least part of a length thereof, and defines at least one element which functions as a sprung leg (5), and which forms an angle with adjacent elements of the straplike part, said angle increasing as the arm is bent outwardly such that the muff is spring-biased against the head of a wearer with a relatively constant pressure over a relatively wide bending range.
1 Assignment
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Accused Products
Abstract
A sprung attachment arm for sound attenuating devices intended to form part of a head stirrup or to be fitted to a protective helmet. The arm (2) is constructed so that one end thereof can be attached to a protective ear muff (4) in a manner to spring-press the ear muff against the head of the wearer. The arm (2) has a substantially straplike configuration along at least part of its length and a cross-section through the straplike part presents at least one part which functions as a sprung leg (5) which forms an angle with adjacent parts of the straplike part (2). The straplike part (2) will preferably include at least two mutually angled sprung legs (5). A sprung arm of this configuration will produce an abutment pressure which will vary only slightly in response to different head sizes.
159 Citations
10 Claims
- 1. A sprung attachment arm for a sound attenuating device forming part of a head stirrup or adapted to be fitted to a protective helmet, said arm (2) being adapted at one end thereof for attachment to a protective ear muff (4), wherein the arm has an elongate, straplike configuration along at least part of a length thereof, and defines at least one element which functions as a sprung leg (5), and which forms an angle with adjacent elements of the straplike part, said angle increasing as the arm is bent outwardly such that the muff is spring-biased against the head of a wearer with a relatively constant pressure over a relatively wide bending range.
Specification