US3701194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for assembling ducts having pittsburgh type joints
Assignee: Individual
•
Filing: 1969-12-18
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Granted: 1972-10-31
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Expires: 1989-12-18
Abstract
Abstract A tool for assembling sections of sheet metal duct. The tool includes a substantially flat body which is substantially vertically disposed during use and a horizontal top marginal edge in the form of a pair of vertically disposed reverse folds defining two laterally adjacent and longitudinally extending channels for receiving the respective parts of the duct being joined. A bottom marginal edge, parallel to the upper edge, is angularly disposed with respect to the body of the tool so that the forward and rearward ends of the tool body portion are spaced laterally away from the duct side wall to be conveniently grasped by the fingers when repositioning the tool along the length of the duct section as the assembly and joining procedure proceeds.
Inventors
- 👤 Erwin Richard Widman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:04
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/02; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53909; Y10T29/53943; Y10T29/53991
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
A tool for assembling a sheet metal duct section or the like, said tool comprising a substantially flat body portion which is normally vertically disposed during use, said body portion Having a horizontally extending upper edge, and a lower edge spaced away from said upper edge, a return bend of said upper edge forming a leg portion extending downwardly from said upper edge and substantially parallel to said body portion, said leg and body portions together defining a downwardly facing, inverted U-shaped open-ended channel therebetween, a second return bend of said upper edge forming an upward extension of said leg portion which is substantially parallel to said leg and body portions, said upward extension and said leg portion together defining a substantially U-shaped upwardly facing open-ended channel which is laterally adjacent to said downwardly facing open-ended channel on the same side of said tool, each of said open-ended channels having substantially equal width slightly greater than the sheet thickness of said sheet metal duct for slidably receiving an edge of the sheet metal in each channel.
Claim 2
Dependent Claim
176 words
A tool for assembling a sheet metal duct section or the like, said tool comprising a substantially flat body portion which is normally vertically disposed during use, said body portion Having a horizontally extending upper edge, and a lower edge spaced away from said upper edge, a return bend of said upper edge forming a leg portion extending downwardly from said upper edge and substantially parallel to said body portion, said leg and body portions together defining a downwardly facing, inverted U-shaped open-ended channel therebetween, a second return bend of said upper edge forming an upward extension of said leg portion which is substantially parallel to said leg and body portions, said upward extension and said leg portion together defining a substantially U-shaped upwardly facing open-ended channel which is laterally adjacent to said downwardly facing open-ended channel on the same side of said tool, each of said open-ended channels having substantially equal width slightly greater than the sheet thickness of said sheet metal duct for slidably receiving an edge of the sheet metal in each channel.
Claim 3
Dependent Claim
31 words
A tool according to claim 1 which further comprises means on said body portion for grasping said tool for slidably moving the same along an edge of said sheet metal duct.
Claim 4
Dependent Claim
90 words
A tool according to claim 2 wherein said means for grasping said tool comprises a lip portion formed by a bend of said lower edge of the body portion, said bend being towards that side of said tool on which both of said channels are located whereby, when said tool is slidably received on an edge of said sheet metal duct, said lower edge of said body portion engages said duct to space said body portion away from said duct for grasping to slide said tool along said duct edge.
References Cited (Backward Citations)
US2260584A
Cited
GB867114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |