Patent US4292903A successfully refreshed from Google Patents.
US4292903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable box stool
Assignee: Individual
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Filing: 1979-11-02
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Granted: 1981-10-06
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Expires: 1999-11-02
Abstract
Abstract This stool is adaptable for many uses, and it includes a hollow outer box, in which is slidably received an inner box, that is elevatable in height by linkage arms and a liftwire. The arrangement also includes a pair of pins for being positioned in openings of the outer box, so as to render the inner box secure at any desired height.
Inventors
- 👤 Robert J. Hockema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:45
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/20; A47C3/34; A47B; A47B9/00; A47B9/14; A47C4/00; A47C4/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
207 words
An adjustable box stool, comprising, in combination, an outer hollow box, an inner hollow box vertically slidable in said outer box, a vertical row of spaced-apart openings on opposite sides of said outer box, a horizontally slidable clevis pin latch in each opposite side wall of said inner box being outwardly slidable into selective of said openings in said outer box, for securement of said boxes together; each said clevis pin latch being connected by a first wire to a longitudinally intermediate portion of a first pair of link rods which at one ends are attached to a bracket mounted on a bottom of said inner box; a second pair of link rods attached at their one ends to opposite ends of said first link rods, and opposite end of each said second pair of link rods being hooked together to one end of a singular, upwardly second wire extending slidably through a transverse hole in a horizontal dowel secured between said side walls of said inner box, and an upper opposite end of said second wire being fitted with a pull ring; and an access hole in a top wall of said inner box for a person's hand to reach therein and pull said pull ring.
Claim 2
Dependent Claim
207 words
An adjustable box stool, comprising, in combination, an outer hollow box, an inner hollow box vertically slidable in said outer box, a vertical row of spaced-apart openings on opposite sides of said outer box, a horizontally slidable clevis pin latch in each opposite side wall of said inner box being outwardly slidable into selective of said openings in said outer box, for securement of said boxes together; each said clevis pin latch being connected by a first wire to a longitudinally intermediate portion of a first pair of link rods which at one ends are attached to a bracket mounted on a bottom of said inner box; a second pair of link rods attached at their one ends to opposite ends of said first link rods, and opposite end of each said second pair of link rods being hooked together to one end of a singular, upwardly second wire extending slidably through a transverse hole in a horizontal dowel secured between said side walls of said inner box, and an upper opposite end of said second wire being fitted with a pull ring; and an access hole in a top wall of said inner box for a person's hand to reach therein and pull said pull ring.
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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) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |