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US 5,346,280 AGranted
Chair with automatic standing aid
OwnerNorman A. Deumiteinventor
Life of this patent
Estimating the term…
Abstract
A chair with an automatic standing aid and a wheelchair which incorporates these features are provided. These chairs can raise or lower an occupant automatically while compensating for the change in the center of gravity with stabilizers. The stabilizers allow the chairs to be lightweight, small in size, and independent of heavy supporting bases. The chairs can be used to replace those on existing wheelchair power bases.
Claims27
A chair with an automatic standing aid which comprises:
- a main frame adapted to be mounted on a supporting base;
- a framework of articulated linkage mounted on said main frame so as to move an occupant into a standing position when raised and move an occupant into a sitting position when lowered;
- a seat and seat back combination for supporting an occupant on said framework of articulated linkage, wherein said seat is mounted to said framework of articulated linkage so as to be horizontal when said framework of articulated linkage is lowered and vertical when said framework of articulated linkage is raised, said seat back being mounted to said articulated linkage so as to remain substantially vertical as the framework of articulated linkage is raised and lowered;
- drive means for automatically raising and lowering the framework of articulated linkage mounted on said main frame and connected to said framework of articulated linkage;
- and
- at least one articulated stabilizer pivotally anchored to the main frame and connected to the framework of articulated linkage so as to contact the ground when the framework of articulated linkage is completely raised and lift off the ground when said framework of articulated linkage is completely lowered, wherein each stabilizer has a wheel attached to the end thereof which contacts the ground, wherein said stabilizer contacts the ground at a point in front of the main frame.
3 more elements
A chair as in claim 3, wherein the articulated stabilizers are pivotally anchored at only one point on the main frame.
A stand-up wheelchair which comprises:
- a mobile power base;
- a main frame mounted to said mobile power base;
- a framework of articulated linkage pivotally mounted on said main frame so as to move an occupant into a standing position when raised and move an occupant into a sitting position when lowered;
- a seat and seat back combination for supporting an occupant on the framework of articulated linkage, wherein said seat is rigidly mounted to the framework of articulated linkage so as to be horizontal when said framework of articulated linkage is lowered and vertical when the framework of articulated linkage is raised, said seat back being pivotally mounted to said articulated linkage so as to remain substantially vertical as the framework of articulated linkage is raised and lowered;
- drive means for automatically raising and lowering the framework of articulated linkage mounted on said main frame and said articulated linkage;
- at least one articulated stabilizer having a wheel positioned at one end, wherein said articulated stabilizer is pivotally anchored to the main frame and connected to the framework of articulated linkage so that the wheel contacts the ground when the framework of articulated linkage is completely raised, and the wheel lifts off the ground when the framework of articulated linkage is completely lowered, wherein said wheel contacts the ground at a point in front of the main frame.
3 more elements
A chair with an automatic standing aid which comprises:
- a main frame adapted to be mounted on a supporting base by a center post;
- a framework of articulated linkage mounted on said main frame so as to move an occupant into a standing position when raised and move an occupant into a sitting position when lowered;
- a seat and seat back combination for supporting an occupant on said framework of articulated linkage, wherein said seat is mounted to said framework of articulated linkage so as to be horizontal when said framework of articulated linkage is lowered and vertical when said framework of articulated linkage is raised, said seat back being mounted to said articulated linkage so as to remain substantially vertical as the framework of articulated linkage is raised and lowered;
- drive means for automatically raising and lowering the framework of articulated linkage mounted on said main frame and connected to said framework of articulated linkage;
- and
- at least one articulated stabilizer pivotally anchored to the main frame and connected to the framework of articulated linkage so as to contact the ground when the framework of articulated linkage is completely raised and lift off the ground when said framework of articulated linkage is completely lowered, wherein each stabilizer has a wheel attached to the end thereof which contacts the ground, wherein said stabilizer contacts the ground at a point in front of the main frame.
3 more elements
Dependencies are inferred from the claim text.