US4298095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work support frame
Assignee: Black and Decker Inc
•
Filing: 1980-01-17
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Granted: 1981-11-03
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Expires: 2000-01-17
Abstract
Abstract A one piece frame for carrying a platform made from a unitary channel adapted to releasably receive a plurality of support legs. Adjustable top brackets mountable in the channel for supporting the platform connect to the frame to affix thereto. Bracing members on the frame prevent lateral shifting of the support legs. The channel at the leg is notched or recessed to permit a clamp to engage standard and substandard legs commonly made from two (2)-foot-by-four (4)-foot wood. Also, the clamps are provided with a plurality of teeth angularly disposed to engage the adjacent leg substantially perpendicular.
Inventors
- 👤 Ronald A. Jackson
- 👤 John Maruscak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:14
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
In a work support, the improvement which comprises: (a) a unitary channel member having a top portion to support one end of a plank and further having integral bent leg portions at respective ends thereof, (b) clamp means on the leg portions for receiving and retaining support legs thereon, and (c) at least one bracing member carried on the channel member to support the leg in a direction of force opposite that exerted thereon by the clamp means.
Claim 2
Dependent Claim
78 words
In a work support, the improvement which comprises: (a) a unitary channel member having a top portion to support one end of a plank and further having integral bent leg portions at respective ends thereof, (b) clamp means on the leg portions for receiving and retaining support legs thereon, and (c) at least one bracing member carried on the channel member to support the leg in a direction of force opposite that exerted thereon by the clamp means.
Claim 3
Dependent Claim
26 words
The combination claimed in claim 1 wherein: (a) the bracing member defines a strap affixed to the channel member on one side of the clamp means.
Claim 4
Dependent Claim
23 words
The combination claimed in claim 2 wherein: (a) the strap affixed to the channel member on the upper side of the clamp means.
Claim 5
Dependent Claim
45 words
The combination claimed in claim 3 wherein: (a) the leg portions having a flat surface against which the clamp urges the leg, and (b) the strap is spaced from the flat surface of the leg portion and lies in the plane of said flat surface.
Claim 6
Dependent Claim
138 words
In a work support, the improvement which comprises: (a) a unitary channel member having a top portion to support one end of a plank and further having integral bent leg portions at respective ends thereof, (b) the leg portions have outwardly extending flanges formed adjacent the clamp means, (c) recesses are formed on the flanges, (d) clamp means affixed to the leg portions on one side of the recesses, and biased toward the flanges in the direction of the recesses to be releasably urged theretoward, and adapted to engage legs disposed in said leg portions, and (e) a bracing member carried on the work support remote from the clamp means to engage the legs and to coact with the clamp means and leg portions to positively clamp the legs thereto and prevent any lateral shifting of said legs.
Claim 7
Dependent Claim
138 words
In a work support, the improvement which comprises: (a) a unitary channel member having a top portion to support one end of a plank and further having integral bent leg portions at respective ends thereof, (b) the leg portions have outwardly extending flanges formed adjacent the clamp means, (c) recesses are formed on the flanges, (d) clamp means affixed to the leg portions on one side of the recesses, and biased toward the flanges in the direction of the recesses to be releasably urged theretoward, and adapted to engage legs disposed in said leg portions, and (e) a bracing member carried on the work support remote from the clamp means to engage the legs and to coact with the clamp means and leg portions to positively clamp the legs thereto and prevent any lateral shifting of said legs.
Claim 8
Dependent Claim
29 words
The combination claimed in claim 5 wherein: (a) the bracing member's defining straps, one for each leg portion, affixed to the flanges on one side of the clamp means.
Claim 9
Dependent Claim
25 words
The combination claimed in claim 6 wherein: (a) the strap to engage the legs on the side opposite the clamp means engagement with the legs.
Claim 10
Dependent Claim
50 words
The combination claimed in claim 1 or 5 wherein: (a) the clamp means has a leading edge, and (b) teeth are formed on the leading edge at an angle relative thereto whereby the teeth will engage the legs at an angle of incidence greater than that of the leading edge.
Claim 11
Dependent Claim
29 words
The combination claimed in claim 8 wherein: (a) the teeth are set at an angle of substantially 70° with respect to the hypothetical line projected from the leading edge.
Claim 12
Dependent Claim
27 words
The combination claimed in claim 8 wherein: (a) the teeth are set at a predetermined angle to engage standard legs substantially perpendicular, whereby positive clamping is obtained.
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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) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |