US4183579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doctor's stool
Assignee: Individual
•
Filing: 1978-05-15
•
Granted: 1980-01-15
•
Expires: 1998-05-15
Abstract
Abstract A stool type seat having a base with floor engaging suction cups to hold the stool in place, the single supporting post having a spring centered hinge to allow the post to tilt in any direction. A saddle type seat is rotatably mounted on top of the post. Stabilizing legs are attached to the post and are hinged to allow the post to swing forward and to some extent to either side, but the legs lock when the post is upright to prevent the stool from tipping over backwards. The structure folds and breaks down into compact components for transportation and storage.
Inventors
- 👤 Enrique M. Gonzalez y. Rojas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:59
CPC Classifications
A; A47; A47C; A47C9/00; A47C9/02; A47C9/025; A47C7/00; A47C7/002; A61; A61B; A61B90/00; A61B90/60
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A stool, comprising: a base having spaced floor engaging base legs; a post extending upwardly from said base and having a self-centering resilient hinge connection to the base; a seat mounted on the upper end of said post; a sleeve slidably mounted on said post above said hinge connection; a pair of spaced stabilizer legs with upper ends pivotally attached to said sleeve and having floor engaging lower ends extending outwardly beyond the base legs; a collar fixed on said post below said sleeve, with links pivotally connecting said stabilizer legs to the collar; and a shoulder on said post defining a stop for limiting downward sliding motion of the sleeve and thereby limiting the outward spread of the stabilizer legs.
Claim 2
Dependent Claim
121 words
A stool, comprising: a base having spaced floor engaging base legs; a post extending upwardly from said base and having a self-centering resilient hinge connection to the base; a seat mounted on the upper end of said post; a sleeve slidably mounted on said post above said hinge connection; a pair of spaced stabilizer legs with upper ends pivotally attached to said sleeve and having floor engaging lower ends extending outwardly beyond the base legs; a collar fixed on said post below said sleeve, with links pivotally connecting said stabilizer legs to the collar; and a shoulder on said post defining a stop for limiting downward sliding motion of the sleeve and thereby limiting the outward spread of the stabilizer legs.
Claim 3
Dependent Claim
19 words
A stool according to claim 1, wherein said stabilizer legs have floor engaging rollers in the lower ends thereof.
Claim 4
Dependent Claim
42 words
A stool according to claim 1, wherein said base has a central hub with a pair of said base legs extending forwardly and a third base leg extending rearwardly therefrom; said stabilizer legs extending rearwardly on opposite sides of said third leg.
Claim 5
Dependent Claim
66 words
A stool according to claim 3, wherein said base legs are pivotally attached to said hub to fold downwardly therefrom; said hub having a downwardly projecting guide pin, a connecting sleeve axially slidable on said guide pin, and links pivotally connecting said base legs to said sleeve; said guide pin having a shoulder comprising a stop for limiting the upward sliding motion of the connecting sleeve.
References Cited (Backward Citations)
DE336216C
Cited
US659089A
Cited
US912310A
Cited
US900077A
Cited
US2402934A
Cited
US2812614A
Cited
US3282530A
Cited
US3203657A
Cited
US3371959A
Cited
US3926472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |