A device for an adjustable chair, where the back of the chair, at a first mounting site on each side thereof, is pivotally connected to respective side members of the chair, and at a second mounting site forms a hinged connection with a rear part of the chair set frame, where the chair seat frame, a
A device for an adjustable chair, where the back of the chair, at a first mounting site on each side thereof, is pivotally connected to respective side members of the chair, and at a second mounting site forms a hinged connection with a rear part of the chair set frame, where the chair seat frame, at a front mounting site on each side thereof, is slidably connected to a respective side member along a front guide which forms a part of the side member. The first mounting site on the chair back is designed to slide along a rear, forward and downward inclining guide in the side member, and the seat frame has on each side a rear mounting site between said front mounting site and said second mounting site for the chair back, said rear mounting site forming a slidable connection with a guide in each respective side member, which is located between the front and rear guides when seen in the longitudinal direction of the side member which is either horizontal or inclines slightly forward and upward.
대표청구항▼
[ What is claimed is:] [1.] A device for an adjustable chair, where the back of said adjustable chair, at a first mounting site on each side thereof, is pivotally connected to respective side members of the chair, and at a second mounting site forms a hinged connection with a rear part of a chair se
[ What is claimed is:] [1.] A device for an adjustable chair, where the back of said adjustable chair, at a first mounting site on each side thereof, is pivotally connected to respective side members of the chair, and at a second mounting site forms a hinged connection with a rear part of a chair seat frame, where the chair seat frame, at a front mounting site on each side thereof, is slidably connected to one of the respective side members along a front guide which forms a part of the side member, wherein said first mounting site on the chair back is designed to slide along a rear, forward and downward inclined guide in the side member, and wherein the seat frame on each side has a rear mounting site between said front mounting site and said second mounting site for the chair back, said rear mounting site forming a slidable connection with a central guide in each respective side member, which is located between the front guide and the rear guide when seen in the longitudinal direction of the side member, characterized in that the front guide is inclined forward and upward and forms an angle with the horizontal in the range of 10.degree.-45.degree., that the central guide forms an angle with the horizontal in the range of 0.degree.-15.degree., and that the rear, forward and downwardly inclined guide is slightly curved, and forms an angle with the horizontal in the range of 15.degree.-45.degree..
Hector, Jr., Melvin G.; Yentzer, Dana R., Structure, components and method for constructing and operating an automatically self locking manually propelled vehicle such as a wheel chair.
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