US3726560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stool
Assignee: Individual
•
Filing: 1971-08-23
•
Granted: 1973-04-10
•
Expires: 1991-08-23
Abstract
Abstract The dental stool has a base with casters permitting movement into desired operating position. The seat is supported by a hinged arm mounting for the seat column lower end, permitting free movement of the column axis in all directions in a horizontal plane. The column length is adjustable for placing the seat at desired height and the seat has a tilting adjustment with respect to the column, and may turn freely about the column axis. The forward edge of the seat is recessed for supporting the thighs to either side of the recess and rearwardly thereof. A horizontal ring cooperating with a rotatable wheel on the column limits the movement with respect to the base and a horizontal plate cooperates with an adjustable spring pressed pad at the bottom of the column to provide a slight frictional resistance to movement of the stool seat and column.
Inventors
- 👤 R Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:38
CPC Classifications
A; A47; A47C; A47C3/00; A61; A61B; A61B90/00; A61B90/60
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
A stool comprising a base, seat and seat support post, and an anti-friction hinged arm mechanism supporting the post over the base with the post axis vertical and permitting free movement horizontally over said base of the post, said hinged arm mechanism comprising a first arm having one end pivotally supported by said base for swinging about a vertical axis and a second arm having one end pivotally carried by the other end of the first arm for also swinging about a vertical axis, and supporting said post at its other end, and limit means comprising a boundary ring supported by the base and a roller carried by the post in position for engagement with said ring for confining, the movement of the post axis to a predetermined area.
Claim 2
Dependent Claim
129 words
A stool comprising a base, seat and seat support post, and an anti-friction hinged arm mechanism supporting the post over the base with the post axis vertical and permitting free movement horizontally over said base of the post, said hinged arm mechanism comprising a first arm having one end pivotally supported by said base for swinging about a vertical axis and a second arm having one end pivotally carried by the other end of the first arm for also swinging about a vertical axis, and supporting said post at its other end, and limit means comprising a boundary ring supported by the base and a roller carried by the post in position for engagement with said ring for confining, the movement of the post axis to a predetermined area.
Claim 3
Dependent Claim
78 words
A stool according to claim 1, in which the middle of the seat front edge is recessed so as to concentrate support to the buttock and thigh regions of a person seated thereon, the seat surfaces to each side of the so recessed portion being substantially coplanar, and the stool further comprising hinge means supporting said seat for tilting forward about a horizontal axis adjacent the top of the post and parallel to the said seat front edge.
Claim 4
Dependent Claim
24 words
A stool according to claim 2 in which the said seat together with its said tilt axis are freely rotatable about the post axis.
Claim 5
Dependent Claim
28 words
A stool according to claim 3, in which the post comprises means for adjusting the the length of the post and correspondingly adjusting the height of said seat.
Claim 6
Dependent Claim
27 words
A stool according to claim 1, comprising an adjustable friction element for providing a slight frictional resistance to said free movement of said post over said base.
Claim 7
Dependent Claim
34 words
A stool according to claim 5, in which said frictional element is carried by the bottom of said post, and comprising a horizontal plate supported by said base and engaged by said frictional element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |