US4583618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coordinated stage system with articulate means
Assignee: Individual
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Filing: 1984-11-15
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Granted: 1986-04-22
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Expires: 2004-11-15
Abstract
Abstract A coordinated stage system with articulate means for interconnecting two or more stages in line and in series for use on scaffolding equipment, pole jacks, bridges, docks and the like is disclosed. The coordinated stage system provides a continuous path wherein the length of the path may be increased and changes in elevation are accomplished by a novel joint arrangement.
Inventors
- 👤 Rudi M. Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:52
CPC Classifications
E; E04; E04G; E04G1/00; E04G1/15; E04G1/152; E04G1/18; E04G1/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
284 words
A coordinated stage system for supporting a person thereon comprising: (a) first and second longitudinal stages, each of said first and second stages having: (i) a pair of diametrically opposed longitudinal side rails, and (ii) a deck supported by said pair of diametrically opposed longitudinal side rails, (b) articulate means for pivotally joining said first and second stages in line and in series about a common axis perpendicular to said pair of diametrically opposed longitudinal rails of said first and second stages, (c) said articulate means includes (i) a first rung in said first stage coaxially disposed in said common axis of said articulate means, (ii) said first rung being fixed between said pair of diametrically opposed longitudinal side rails at one end of said first stage, (iii) extension bracket means fixed to said second stage and extending therefrom in cooperative relationship with said first rung of said first stage for pivotally coaxially coupling said second stage to said first stage; (iv) said extension bracket means includes a pair of cradle support members positioned in cradling cooperative relationship to said first rung of said first stage for said pivotal movement of said first and second stages about said common axis, and (v) said pair of cradle support members include a locking means disposed above said common axis and above said first rung of said first stage when said first rung of said first stage is cradled within said pair of said cradle support members for pivotally locking said first rung of said first stage to said pair of said cradle support members so that said locking means and said rung of said first stage are visible to said person on said coordinated stage system.
Claim 2
Dependent Claim
284 words
A coordinated stage system for supporting a person thereon comprising: (a) first and second longitudinal stages, each of said first and second stages having: (i) a pair of diametrically opposed longitudinal side rails, and (ii) a deck supported by said pair of diametrically opposed longitudinal side rails, (b) articulate means for pivotally joining said first and second stages in line and in series about a common axis perpendicular to said pair of diametrically opposed longitudinal rails of said first and second stages, (c) said articulate means includes (i) a first rung in said first stage coaxially disposed in said common axis of said articulate means, (ii) said first rung being fixed between said pair of diametrically opposed longitudinal side rails at one end of said first stage, (iii) extension bracket means fixed to said second stage and extending therefrom in cooperative relationship with said first rung of said first stage for pivotally coaxially coupling said second stage to said first stage; (iv) said extension bracket means includes a pair of cradle support members positioned in cradling cooperative relationship to said first rung of said first stage for said pivotal movement of said first and second stages about said common axis, and (v) said pair of cradle support members include a locking means disposed above said common axis and above said first rung of said first stage when said first rung of said first stage is cradled within said pair of said cradle support members for pivotally locking said first rung of said first stage to said pair of said cradle support members so that said locking means and said rung of said first stage are visible to said person on said coordinated stage system.
Claim 3
Dependent Claim
62 words
The invention defined in claim 1 wherein said locking means includes a pair of locking pins extending through a corresponding pair of openings in said pair of cradle support members disposed above said common axis of said articulate means and positioned in cooperative relationship with said first rung of said first stage for pivotally locking said first stage to said second stage.
References Cited (Backward Citations)
US405195A
Cited
FR362729A
Cited
US1356819A
Cited
US2318493A
Cited
US3289788A
Cited
FR93137E
Cited
FR2424987A1
Cited
US4499967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |