Patent US5209549A successfully refreshed from Google Patents.
US5209549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable rotation chair
Assignee: Individual
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Filing: 1991-05-28
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Granted: 1993-05-11
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Expires: 2011-05-28
Abstract
Abstract An adjustable chair which allows the user to select a desired lying position. It has a base of circular shape having a connection assembly to rotatably receive a framework, to which a hinged back and seat portions are secured. The framework has a slidable bar supporting the seat portion, while a pair of arms integrally formed on the framework are pivotedly connected to the back portion. Therefore, as one lying on the chair, by properly manipulating the body weight and adjusting the slidable bar, the chair can be adjusted to a desired inclined angle.
Inventors
- 👤 I-Shan Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:02
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/032; A47C1/03255; A47C1/03205; A47C1/03238
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
322 words
A rotatable and adjustable chair, comprising: a base for stabilizing said chair on a floor; a frame rotatable on a shaft engaged in a bearing on said base; said frame comprising: a lower bar having an axis parallel to the plane of said floor and a connecting plate at a center of said lower bar rotatably engaged to said shaft; a first end of each of two v-shaped arms integrally engaged to each end of said lower bar; said v-shaped arms rising above said lower bar at an acute angle to said plane of said floor; a first reinforcing bar parallel to said lower bar fixedly engaged at its ends respectively to each of said two v-shaped arms; a first tubular member fixedly engaged to said connecting plate and a center of said first reinforcing bar; and a second tubular member, disposed in said first tubular member having a pair of bearings disposed therein at both ends; a first end of a slidable bar slidably engaged within said pair of bearings; said slidable bar having a pair of transverse pins limiting slidable movement of said first end of said slidable bar within said second tubular member; control means threadingly engaged through said first tubular member and said second tubular member for fixing said slidable bar relative to said second tubular member; a first edge of each of a back and a seat of said chair being rotatably engaged to each other; a second end of said slidable bar being rotatably engaged to a bottom of said seat; a second end of each of said two v-shaped arms rotatably engaged to side edges of said back; wherein, when said control means is disengaged from said slidable bar, a user can adjust the inclination of said back and said seat to a desirable angle and then fix said back and said seat at said angle by fixing said control means to said slidable bar.
Claim 2
Dependent Claim
322 words
A rotatable and adjustable chair, comprising: a base for stabilizing said chair on a floor; a frame rotatable on a shaft engaged in a bearing on said base; said frame comprising: a lower bar having an axis parallel to the plane of said floor and a connecting plate at a center of said lower bar rotatably engaged to said shaft; a first end of each of two v-shaped arms integrally engaged to each end of said lower bar; said v-shaped arms rising above said lower bar at an acute angle to said plane of said floor; a first reinforcing bar parallel to said lower bar fixedly engaged at its ends respectively to each of said two v-shaped arms; a first tubular member fixedly engaged to said connecting plate and a center of said first reinforcing bar; and a second tubular member, disposed in said first tubular member having a pair of bearings disposed therein at both ends; a first end of a slidable bar slidably engaged within said pair of bearings; said slidable bar having a pair of transverse pins limiting slidable movement of said first end of said slidable bar within said second tubular member; control means threadingly engaged through said first tubular member and said second tubular member for fixing said slidable bar relative to said second tubular member; a first edge of each of a back and a seat of said chair being rotatably engaged to each other; a second end of said slidable bar being rotatably engaged to a bottom of said seat; a second end of each of said two v-shaped arms rotatably engaged to side edges of said back; wherein, when said control means is disengaged from said slidable bar, a user can adjust the inclination of said back and said seat to a desirable angle and then fix said back and said seat at said angle by fixing said control means to said slidable bar.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-10 | 1996-11-09 | 1997-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-10 | 2000-11-09 | 2001-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-10 | 2004-11-09 | 2005-05-11 | $7700.00 | Window Closed / Lapsed |