Patent US4216933A successfully refreshed from Google Patents.
US4216933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable scaffold support base
Assignee: Individual
•
Filing: 1979-03-06
•
Granted: 1980-08-12
•
Expires: 1999-03-06
Abstract
Abstract A portable scaffold support base is disclosed which can be transported from one use site to another by a fork lift or the like. When it is delivered to the use site, the base is oriented horizontal by adjusting vertical supporting legs which are initially located over the best available surface by an outrigger extending from the base.
Inventors
- 👤 Milton A. Cramer, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:28
CPC Classifications
E; E04; E04G; E04G1/00; E04G1/24; E04G5/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
A portable scaffold support base comprising, a rigid rectangular frame, a pair of tubular cross bars rigidly attached to said frame in parallel and spaced relation, said tubular cross bars being open at one end to receive a fork lift, tubular outrigger collars disposed at each corner of said frame, outrigger members slidable in said collars and adapted to be adjustable to form horizontally disposed extensions from said frame, vertically disposed sleeves mounted on the outer ends of said outrigger members, vertically disposed support legs slidably received in said sleeves, means for locking said support legs in selected position in said sleeves, and means for attaching a scaffold mounted on said frame, whereby said frame may be supported in a horizontal plane with said outrigger members extended horizontally selected distances and said support legs extended vertically selected distances to provide support on the best available surface.
Claim 2
Dependent Claim
146 words
A portable scaffold support base comprising, a rigid rectangular frame, a pair of tubular cross bars rigidly attached to said frame in parallel and spaced relation, said tubular cross bars being open at one end to receive a fork lift, tubular outrigger collars disposed at each corner of said frame, outrigger members slidable in said collars and adapted to be adjustable to form horizontally disposed extensions from said frame, vertically disposed sleeves mounted on the outer ends of said outrigger members, vertically disposed support legs slidably received in said sleeves, means for locking said support legs in selected position in said sleeves, and means for attaching a scaffold mounted on said frame, whereby said frame may be supported in a horizontal plane with said outrigger members extended horizontally selected distances and said support legs extended vertically selected distances to provide support on the best available surface.
Claim 3
Dependent Claim
57 words
A portable scaffold support base as claimed in claim 1, wherein said means to lock said support leg in said sleeve includes at least one bore through said sleeve; a plurality of bores through said support leg; and a pin, which passes through said bore in said sleeve and one of said bores in said support leg.
Claim 4
Dependent Claim
84 words
A portable scaffold support base as claimed in claim 1, further comprising pairs of tubular reinforcing bars, each of said pair of tubular reinforcing bars being spaced apart and parallel to each other and rigidly attached at one end perpendicular to one of said pair of tubular cross bars and attached at the other end to said frame such that said scaffold support base is also transportable by a fork lift or the like which engages one of said pairs of tubular reinforcing bars.
Claim 5
Dependent Claim
24 words
A portable scaffold support base as claimed in claim 3, wherein said tubular cross bars and said tubular reinforcing bars are rectangular in cross-section.
Claim 6
Dependent Claim
27 words
A portable scaffold support base as claimed in claim 3, further comprising a detachable foot mounted on the lower end of each of said vertical support legs.
References Cited (Backward Citations)
US2598730A
Cited
US2820561A
Cited
US3071204A
Cited
US3063667A
Cited
FR1406373A
Cited
US3302751A
Cited
US3329103A
Cited
US3506138A
Cited
US3850264A
Cited
US3857494A
Cited
FR2301443A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |