Pittsburgh hand tool

Inactive Publication Date: 2020-07-23
DURO DYNE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The tool described in this disclosure has a unique design that makes it easier to enter and mate with a Pittsburgh lock. It is also easier to manufacture, requires less material, and is more ergonomic for the user.

Problems solved by technology

Such known tools typically have, at the working end, flat sides and sharp angles, including right angles, which shapes can create difficulties in getting the tool to gain entry to and properly mate with the Pittsburgh Lock, requiring awkward and time-consuming manipulations.

Method used

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  • Pittsburgh hand tool
  • Pittsburgh hand tool

Examples

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Embodiment Construction

[0007]The description herein is made with reference to the Figures. This is for purposes of convenience only and is not restrictive or limiting to the scope of the disclosure and the practice thereof.

[0008]Referring to FIG. 1, depicted thereat is a cross-sectional view of an embodiment of the tool of the disclosure. As shown in this particular embodiment, tool 10 comprised of elongated handle portion 17. In one practice, elongated handle portion 17 is a rigid, flat, and substantially planar, substantially rectangular handle portion comprised of, without limitation, metal (e.g. cold-rolled steel), plastic, glass-filled nylon and like materials as known in the art for sheet metal tooling. In the embodiment depicted at FIG. 1, the handle portion 17 extends from a first end, generally shown at 12, to a second end, generally shown at 11. The first end 12 comprises two prongs, 13 and 14. First prong 13 extends in an outward direction from handle portion 17 and lies in substantially the sa...

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Abstract

Disclosed is a tool useful for fabricating sheet metal ductwork, the tool comprises a handle portion extending from an end of which are first and second prongs, the first prong extending from and in substantially the same plane as the handle portion, the second prong extending outwardly from the handle at a obtuse angle and spaced apart and opposite from the first prong; the second prong having an arcuate tip end that is curved radially at an acute angle toward the direction of the first prong but extending just beyond it.

Description

FIELD OF THE DISCLOSURE[0001]The disclosure relates to a hand tool useful in the fabrication of sheet metal ductwork in the HVAC industry. In one embodiment, the tool of the disclosure is categorizable in the art as a Pittsburgh Lock Opening Tool which is used to open longitudinal seams on sheet metal ductwork.BACKGROUND[0002]Metal ductwork is often formed of connected sections, commonly having a rectilinear cross-section. A Pittsburgh Lock is known to be a type of corner joint between two pieces of sheet metal. It is made by a particular type of folding of the sheet metal edges to create a desired profile which interlocks to join two pieces together. Such a joint is typified by longitudinal seam in the ductwork. For purposes of ductwork fabrication, repair and / or replacement, this longitudinal seam needs to be opened. While various methods of doing so are known, an improvement is nonetheless needed in the related tooling. Such known tools typically have, at the working end, flat si...

Claims

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Application Information

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IPC IPC(8): B21D39/02B21D3/14
CPCB21D3/14B21D39/02B21D39/025
Inventor BELLISE, ANDREW J.KRUPNICK, DAVID B.AGHABEKIAN, STEVE
Owner DURO DYNE CORP
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