Locking device and headrest

Chairs and seats – Headrest – Adjustable rectilinearly vertically

Reexamination Certificate

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Reexamination Certificate

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10549955

ABSTRACT:
A locking device and a headrest are disclosed. The locking device includes spring elements, which can be engaged in at least one locking position and the locking device can be displaced in relation to at least two retaining bars that have a large number of recesses. The spring elements co-operate with the recesses in such a way that the engagement of the spring elements in their locking position locks the locking device in relation to the retaining bars. According to the invention, the spring elements are configured in such as way that the retaining bars are locked by the mechanical fixing of the spring elements in their central zone or by exertion of a force on the spring elements in their central zone.

REFERENCES:
patent: 3563602 (1971-02-01), Ohta et al.
patent: 3572831 (1971-03-01), Barecki et al.
patent: 4671573 (1987-06-01), Nemoto et al.
patent: 296 13 073 (1996-09-01), None
patent: 196 30 473 (1998-01-01), None
patent: 0 864 461 (1998-09-01), None
patent: 0 916 549 (1999-05-01), None
PCT International Preliminary Report on Patentability (Translation), based on International Application No. PCT/EP2004/002701, date of mailing Mar. 2, 2006 (7 pages).
Search Report by European Patent Office for International Application No. PCT/EP2004/002701; mailing date Jul. 16, 2004; 2 pages.

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