Patent US2902799A successfully refreshed from Google Patents.
Patent US4779542A successfully refreshed from Google Patents.
US4779542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fold and roll staging
Assignee: Stageright Corp
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Filing: 1987-07-31
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Granted: 1988-10-25
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Expires: 2007-07-31
Abstract
Abstract A portable and foldable platform stage assembly has two support panels movable from a collapsed position with panels closely adjacent each other to an operative position with the panels in a single plane, the inner edges in substantial contact. Roller wheels move from a storage position when the panels are in operative position to a floor contacting position when the panels are collapsed for storage or movement. Outer legs move from a storage position to a vertical operative position when the panels are shifted to operative position. A central support frame pivotally supports the inner edges of the platform panels in the two positions with shaped spaced support links which provide positive support in the operative position and adapt to a receiving position when the panels are moved to storage positions.
Inventors
- 👤 Kenneth E. Staten
- 👤 Orley D. Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:17
CPC Classifications
A; A47; A47B; A47B25/00; A47B25/003; E; E04; E04H; E04H3/00; E04H3/10; E04H3/22; E04H3/24; E04H3/28; A47B2025/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
193 words
A fold and roll platform assembly comprising: (a) a pair of platform panels, (b) outer legs on each said panels to support the outer edges in operative position, (c) a central support frame to support the panels in storage position when said panels are disposed parallel to each other or in operative position when positioned inner edge to inner edge in a common plane, said support frame comprising: (1) a base member on said frame extending in the same direction and spaced from said common plane, (2) main support legs at each end of said frame extending upwardly and pivotally connected to said respective panels adjacent the respective inner edges of said panels, and pivotally connected to said base member, (3) secondary support legs spaced from said main support legs each pivotally connected to said respective panels and said base member, said main and secondary support legs being simultaneously movable to allow said panels to shift from a vertical upright storage position to a horizontal operative position, said main and secondary support legs acting in substantially parallel position to support the inner edges of said panels on said base member of said frame.
Claim 2
Dependent Claim
193 words
A fold and roll platform assembly comprising: (a) a pair of platform panels, (b) outer legs on each said panels to support the outer edges in operative position, (c) a central support frame to support the panels in storage position when said panels are disposed parallel to each other or in operative position when positioned inner edge to inner edge in a common plane, said support frame comprising: (1) a base member on said frame extending in the same direction and spaced from said common plane, (2) main support legs at each end of said frame extending upwardly and pivotally connected to said respective panels adjacent the respective inner edges of said panels, and pivotally connected to said base member, (3) secondary support legs spaced from said main support legs each pivotally connected to said respective panels and said base member, said main and secondary support legs being simultaneously movable to allow said panels to shift from a vertical upright storage position to a horizontal operative position, said main and secondary support legs acting in substantially parallel position to support the inner edges of said panels on said base member of said frame.
Claim 3
Dependent Claim
58 words
A fold and roll platform assembly as defined in claim 1 in which operative links respectively connect said outer legs with said main support legs to move said outer legs from a storage position adjacent a panel to an operative position perpendicular to a panel when said panels are moved from a storage position to an operative position.
Claim 4
Dependent Claim
51 words
A fold and roll platform assembly as defined in claim 2 in which roller wheels are mounted on extensions of said respective operative links to shift from a surface contacting position to a storage position when said panels are moved on said frame from a storage position to an operative position.
Claim 5
Dependent Claim
43 words
A fold and roll platform assembly as defined in claim 1 in which said secondary support legs are formed in a dogleg shape to provide a concave clearance area for the inner edge of a panel as it moves to a storage position.
Claim 6
Dependent Claim
42 words
A fold and roll platform assembly as defined in claim 1 in which each said main support leg has a bend to provide a storage space for one end of each said secondary support leg when said panels are in storage position.
Claim 7
Dependent Claim
52 words
A fold and roll platform assembly as defined in claim 1 in which a short arm is positioned and secured adjacent the inner edge of each said platform panel, and the upper ends of said main support legs and said secondary support legs are pivotally attached to said arm at spaced positions.
Claim 8
Dependent Claim
44 words
A fold and roll platform assembly as defined in claim 6 in which each said main support leg has a bend to provide a storage space for said short arm and one end of said secondary leg when said panels are in storage position.
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |