Directional lock for interface headgear arrangement
AssigneeFisher & Paykel Healthcare Limited
InventorsJeroen Hammer, Vitaly Kapelevich
Life of this patent
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Abstract
A directional lock or a headgear or interface assembly comprising one or more directional locks that include a catch arrangement for initiating or assisting in movement of a lock member of the direction lock. In some configurations, the catch arrangement assists movement of the lock member in only a portion of a range of travel of the lock member. In some configurations, the directional lock has a housing and a sleeve and the catch arrangement has a catch arm carried by the sleeve. The catch arm includes a catch end that contacts the lock member, which can be a lock washer in some configurations.
Claims20
A directional lock, comprising:
- a housing defining a channel;
- a pair of rollers supported by the housing and positioned within the channel;
- a core that passes between the pair of rollers;
- wherein the pair of rollers is movable relative to the housing between a first position, which provides a first level of resistance to rotation of the pair of rollers, and a second position, which provides a second level of resistance to rotation of the pair of rollers, wherein the second level of resistance is higher than the first level of resistance;
- and
- wherein the second level of resistance is caused at least in part by contact between the pair of rollers and the housing,
- wherein each of the pair of rollers comprises an axle that forms a center of each of the pair of rollers such that each of the pair of rollers rotates about the respective axle.
Dependencies are inferred from the claim text.