Dental patient chair with an adjustable headrest
AssigneeSiemens Aktiengesellschaft
InventorsUlrich Steininger, Klaus Stoeckl, Tilman Phleps
Life of this patent
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Abstract
A dental patient chair has an adjustable headrest on a headrest carrier. The headrest is pivotably hinged around a transverse first axis on a bracing member which, in turn, is adjustable in the longitudinal direction in the backrest. In addition, the headrest is connected by a linkage which is pivotably connected on a second axis offset from the first axis so that movement of the linkage causes tilting of the headrest. The linkage is shifted as the headrest carrier is extended and contracted.
Claims10
A dental patient chair comprising a headrest, a backrest, a headrest carrier, first means for adjustably positioning the headrest carrier in said backrest, second means disposed in said headrest carrier for positioning the headrest relative to said headrest carrier, said second means including a bracing member pivotably connected to the headrest on a first axis, a link extending at least over a part of the length of the headrest carrier, said link having a pivotable connection with the headrest on a second axis offset from the first axis, and adjustment means being allocated to the headrest carrier and having a connection to said link for shifting the link to cause pivoting of said headrest on the first axis, the headrest carrier being composed of a lower section, a middle section and an upper section, said lower section containing a base part mounted for longitudinal displacement in the backrest by said first means for adjustably positioning, said middle section containing a middle carrier pivotably connected to the base part and being slightly pivotable in comparison thereto, the upper section containing the bracing member for movement relative thereto, and the backrest having an upwardly open cutout portion with guide means provided on both sides of said cutout, said first means for adjustably positioning including the lower section having means coacting with said guide means.
A dental patient chair comprising a headrest, a backrest, a headrest carrier, first means for adjustably positioning the headrest carrier in said backrest, second means disposed in said headrest carrier for positioning the headrest relative to said headrest carrier, said second means including a bracing member pivotably connected to the headrest on a first axis, a link extending at least over a part of the length of the headrest carrier, said link having a pivotable connection with the headrest on a second axis offset from the first axis, and adjustment means being allocated to the headrest carrier and having a connection to said link for shifting the link to cause pivoting of said headrest on the first axis, the pivotable connection of the link being disposed at an end of said link and including a pivot bearing arranged approximately at the middle of the headrest, said bracing member having a slot-like cutout receiving said link, the connection between the link and adjustment means being at another end of the link and being formed by a connection of said link to a lever mechanism of the adjustment means so that the headrest and a middle carrier of the headrest carrier are adjusted in the sense of a lifting inclination given an outwardly directed motion of the bracing member and are adjusted in a sense of lowering the inclination given an inwardly directed motion of the bracing member.
A dental patient chair comprising a headrest, a backrest, a headrest carrier, first means for adjustably positioning the headrest carrier in said backrest, second means disposed in said headrest carrier for positioning the headrest relative to said headrest carrier, said second means including a bracing member pivotably connected to the headrest on a first axis and a link extending at least the length of the headrest carrier and being pivotably connected to the headrest at a second axis offset from the first axis, said headrest carrier being composed of a lower section, a middle section and an upper section, said lower section containing a base part mounted for longitudinal displacement in the backrest by said first means for adjustably positioning, said middle section containing a middle carrier pivotably connected to the base part and means for pivoting said middle carrier relative to said base part, the upper section containing the bracing member and means for moving said bracing member relative to the middle section as said middle carrier is pivoted to simultaneously move said link relative to said bracing member thereby pivoting said headrest about said second axis.
Dependencies are inferred from the claim text.