US4088203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable scaffold
Assignee: Individual
•
Filing: 1976-11-03
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Granted: 1978-05-09
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Expires: 1996-11-03
Abstract
Abstract An adjustable scaffold having a platform supported from a base by at least two sets of scissors connectors, and a lifting means for adjusting the platform between stored and elevated positions. The lifting means is pivotally attached between, rather than within, the sets of scissors connectors.
Inventors
- 👤 Raymond E. Smith, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:42
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; B66F11/042; E; E04; E04G; E04G1/00; E04G1/18; E04G1/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
165 words
An adjustable scaffold comprising: a base; a platform connected to said base; and means for raising and lowering said platform above said base, comprising first and second scissors connectors between said platform and said base, each of said scissors connectors having an inner member pivotally connected to two outer members, said first and second scissors connectors being pivotally joined to each other at ends of their members, and a pair of hydraulic cylinders, each of said cylinders having a bottom end pivotally attached to the inner member of said first scissors connector at a position closer to the middle than to an end of said inner member, and a pair of lever brackets, each of said lever brackets being pivotally attached to a top end of each of said pair of hydraulic cylinders, each of said lever brackets further being secured to an outer member of said second scissors connector at a position closer to an end than to the middle of the outer member.
Claim 2
Dependent Claim
165 words
An adjustable scaffold comprising: a base; a platform connected to said base; and means for raising and lowering said platform above said base, comprising first and second scissors connectors between said platform and said base, each of said scissors connectors having an inner member pivotally connected to two outer members, said first and second scissors connectors being pivotally joined to each other at ends of their members, and a pair of hydraulic cylinders, each of said cylinders having a bottom end pivotally attached to the inner member of said first scissors connector at a position closer to the middle than to an end of said inner member, and a pair of lever brackets, each of said lever brackets being pivotally attached to a top end of each of said pair of hydraulic cylinders, each of said lever brackets further being secured to an outer member of said second scissors connector at a position closer to an end than to the middle of the outer member.
Claim 3
Dependent Claim
19 words
The adjustable scaffold of claim 1 wherein said hydraulic cylinders are positioned laterally intermediate said inner and outer members.
Claim 4
Dependent Claim
166 words
An adjustable scaffold comprising: a base; a platform connected to said base; and means for raising and lowering said platform above said base, comprising first and second scissors connectors between said platform and said base, each of said scissors connectors having an inner member pivotally connected to two outer members, said first and second scissors connectors being pivotally joined to each other at ends of their members, and a pair of hydraulic cylinders, each of said hydraulic cylinders having a top end pivotally attached to the inner member of said second scissors connector at a position closer to an end than to the middle of said inner member, and a pair of lever brackets, each of said lever brackets being pivotally attached to a bottom end of each of said pair of hydraulic cylinders, each of said lever brackets further being secured to the outer members of said first scissors connector at a position closer to the middle than to an end of the outer members.
Claim 5
Dependent Claim
166 words
An adjustable scaffold comprising: a base; a platform connected to said base; and means for raising and lowering said platform above said base, comprising first and second scissors connectors between said platform and said base, each of said scissors connectors having an inner member pivotally connected to two outer members, said first and second scissors connectors being pivotally joined to each other at ends of their members, and a pair of hydraulic cylinders, each of said hydraulic cylinders having a top end pivotally attached to the inner member of said second scissors connector at a position closer to an end than to the middle of said inner member, and a pair of lever brackets, each of said lever brackets being pivotally attached to a bottom end of each of said pair of hydraulic cylinders, each of said lever brackets further being secured to the outer members of said first scissors connector at a position closer to the middle than to an end of the outer members.
Claim 6
Dependent Claim
19 words
The adjustable scaffold of claim 3 wherein said hydraulic cylinders are positioned laterally intermediate said inner and outer members.
Claim 7
Dependent Claim
223 words
An adjustable scaffold comprising: a base; a platform; first and second scissors connectors coupled between said platform and said base, each of said scissors connectors having a pair of outer members pivotally connected to an inner member; means for pivotally connecting one end of the outer members of said first scissors connector to one end of the inner member of said second scissors member; means for pivotally connecting one end of the inner member of said first scissors connector to one end of the outer members of said second scissors connector; a first pair of hydraulic cylinders having respective bottom ends pivotally attached to the inner member of said first scissors connector at positions closer to the middle than to an end of said inner member, and having respective upper ends pivotally attached to the outer members of said second scissors connector at positions closer to an end than to the middle of said outer members; and a second pair of hydraulic cylinders having respective bottom ends pivotally attached to the outer members of said first scissors connector at positions closer to the middle than to the ends of said outer members, and having respective upper ends pivotally attached to the inner member of said second scissors connector at a position closer to the end than to the middle of said inner member.
Claim 8
Dependent Claim
223 words
An adjustable scaffold comprising: a base; a platform; first and second scissors connectors coupled between said platform and said base, each of said scissors connectors having a pair of outer members pivotally connected to an inner member; means for pivotally connecting one end of the outer members of said first scissors connector to one end of the inner member of said second scissors member; means for pivotally connecting one end of the inner member of said first scissors connector to one end of the outer members of said second scissors connector; a first pair of hydraulic cylinders having respective bottom ends pivotally attached to the inner member of said first scissors connector at positions closer to the middle than to an end of said inner member, and having respective upper ends pivotally attached to the outer members of said second scissors connector at positions closer to an end than to the middle of said outer members; and a second pair of hydraulic cylinders having respective bottom ends pivotally attached to the outer members of said first scissors connector at positions closer to the middle than to the ends of said outer members, and having respective upper ends pivotally attached to the inner member of said second scissors connector at a position closer to the end than to the middle of said inner member.
Claim 9
Dependent Claim
19 words
The adjustable scaffold of claim 5 wherein said hydraulic cylinders are positioned laterally intermediate said inner and outer members.
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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |