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US 4,546,498 AGranted
Electrically powered device for opening and closing the visor of a crash helmet
OwnerLino Fantininventor
Life of this patent
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Abstract
The device comprises a small electric motor driving, through reduction gearing, a gear segment associated with the visor pivot point. The gear segment has a configuration which includes a quarter of a circle and a straight portion which imparts the visor with an initial forward movement followed by a pivotal movement during the opening phase, and vice versa during the closing phase.
Claims3
An electrically powered device for opening and closing the visor of a crash helmet comprising:
- a casing positioned within the temple regions of the motorcyclist's crash helmet;
- an electric motor including a reduction gearing and housed in said casing;
- a gear segment movably supported on said casing and driven by said motor through said reduction gearing;
- a slot formed in the walls of said casing;
- a first pin mounted for rotation together with and projecting from said gear segment slidably engaging in said slot and connecting the visor ends to said gear segment;
- a cam comprising a first rectilinear portion followed by a second portion in the shape of an arc of a circle,
- a second pin projecting from said gear segment and engaging in said cam;
- the first portion of said cam having limits, which define a stroke of said second pin, which is equal to the stroke allowed to said first pin by said slot, so that when a rotatory motion is imparted by the motor to the reduction gearing, this rotatory motion is converted first in a linear motion of the gear segment and thereafter the rotatory motion is transmitted to the gear segment, when said gear segment reaches a rotatory condition.
5 more elements
Dependencies are inferred from the claim text.