Worm drive adjustment for headgear suspension
US8578521B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2011 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Jul 27, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA42B3/145
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A headgear adjustment mechanism is provided that includes a worm having a central axis of rotation, a first headband element, a second headband element, a spur gear, and a housing. The first headband element includes (i) a worm rack disposed in operative engagement with the worm, and (ii) a first pinion rack. The second headband element includes a second pinion rack. The spur gear is disposed in simultaneous operative engagement with the first pinion rack and the second pinion rack, and the housing at least partially encloses the first and second headband elements. During operation of the adjustment mechanism, rotation of the worm about the axis of rotation causes the first headband element and the second headband element to translate in opposite directions with respect to the worm, thereby adjusting a fit of the headgear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.