Patent US3841437A successfully refreshed from Google Patents.
US3841437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable step stool
Assignee: Individual
•
Filing: 1973-06-28
•
Granted: 1974-10-15
•
Expires: 1993-06-28
Abstract
Abstract A stool suitable for standing upon to reach high places is described. The stool includes an upstanding post to be grasped by the user to keep his balance and also includes a roller which is normally inactive but which, when the stool is tilted, becomes active enabling the stool to be rolled about easily. One embodiment includes a step at a first level and a platform at a higher level.
Inventors
- 👤 J Caughey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:08
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/005
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
204 words
A stool, comprising, first and second generally rectangular upright side members disposed parallel to each other and each having a bottom edge, a top edge, a front edge and a rear edge, said bottom edges being adapted to be engaged and supported by a flat surface, a generally rectangular top member supported by said side members and fastened to the top edges thereof, and an elongated roller mounted between said side members for rotation about an axis parallel to said surface and located above said bottom edges and forward of said rear edges by first and second distances, respectively, both approximately equal to the radius of said roller, so that no portion of said roller projects substantially beyond said rear edges of said side members, said side members each being formed with the junction between said rear and bottom edges cut away sufficiently so that as said stool is tilted backward said roller engages said surface and said bottom edges become disengaged therefrom, whereby said stool may be rolled along said surface and whereby said stool may be stored in a space little wider than the width of the stool and with said rear edges of said side members substantially flush against a wall.
Claim 2
Dependent Claim
204 words
A stool, comprising, first and second generally rectangular upright side members disposed parallel to each other and each having a bottom edge, a top edge, a front edge and a rear edge, said bottom edges being adapted to be engaged and supported by a flat surface, a generally rectangular top member supported by said side members and fastened to the top edges thereof, and an elongated roller mounted between said side members for rotation about an axis parallel to said surface and located above said bottom edges and forward of said rear edges by first and second distances, respectively, both approximately equal to the radius of said roller, so that no portion of said roller projects substantially beyond said rear edges of said side members, said side members each being formed with the junction between said rear and bottom edges cut away sufficiently so that as said stool is tilted backward said roller engages said surface and said bottom edges become disengaged therefrom, whereby said stool may be rolled along said surface and whereby said stool may be stored in a space little wider than the width of the stool and with said rear edges of said side members substantially flush against a wall.
Claim 3
Dependent Claim
135 words
A stool in accordance with claim 1 in which said junctions between said rear and bottom edges are cut away sufficiently so that no portion of either edge extends beyond the lower rear quadrant of said roller and in which said side members are formed with the junction between said front and top edges notched to form a ledge parallel to said top and bottom edges approximately midway there between and which includes a stair tread mounted on said ledges and which includes a post extending upwardly through an aperture in said top member located adjacent to said rear edge approximately midway between said side members and which includes a cross member beneath said top member and supported by said side members and formed with a recess for receiving the lower end of said post.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |