Automatically deployable and retractable combiner mechanism

Details Automatically deployable and retractable combiner mechanism Automatically deployable and retractable combiner mechanism

1994-03-17

1996-09-10

Crowder, C. D.

Apparel

Guard or protector

For wearer's head

2 62, 359632, A42B 304, C02B 2710

Patent

active

055533280

ABSTRACT:
Device for rapidly and automatically deploying and retracting a combiner attached to a visored helmet. A combination of opposing springs, one made from conventional materials and the other from shape memory alloy (SMA), effects a detent mechanism and the retracting and deploying mechanism. The conventional spring normally exerts a greater force than the SMA spring, but the latter exerts the greater force upon being heated, preferably by means of an electric current passing through the spring. Alternative deployment and retraction means include a solenoid-conventional spring combination or an electrical motor which used in conjunction with a locking and unlocking means incorporating a SMA spring.

REFERENCES:
patent: 3170979 (1965-02-01), Baldwin
patent: 4081209 (1978-03-01), Heller et al.
patent: 4364636 (1982-12-01), Ellis
patent: 4829843 (1989-05-01), Suzuki
patent: 4976327 (1990-12-01), Abujudom
patent: 4984542 (1991-01-01), Rische
patent: 4992339 (1991-02-01), Geogopoulos
patent: 5019932 (1991-05-01), Iwata

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