# US 5,706,583 A · Twin utility hacksaw blade > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,706,583 A - Document ID: US5706583A - Status: Granted - Kind: A - Application number: 08/673,685 - Filed: 1996-06-25 - Granted: 1998-01-13 - Earliest claimed: 1996-06-25 - Inventors: Robert J. Gengenbach - Web page: https://patentgrep.com/patent/US5706583A ## CPC - B23D 61/123: {Details of saw blade body} - B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q) ## Abstract A dual utility hacksaw blade includes additional mounting through holes. The first set of holes (outer) being the mounting holes for the use of the saw as a conventional hacksaw and the second set of holes being initially pilot holes to be enlarged by the end user when the second utility is desired. The method of the invention also recommends enlarging the first set of holes for mounting in the reciprocating saw as the second utility. Additionally, the blade may include construction facilitating breakage of the hacksaw at predetermined areas and in predetermined angles to provide the second utility. The hacksaw may also simply, and preferably, be cut or broken off for the second utility. ## Claims ### Claim 1 A dual utility blade comprising: a) an elongated blade having two elongated edges one of which being adapted to cut an object and two longitudinal ends said blade including a structure adapted to facilitate shearing of said blade in predetermined locations and at predetermined angles; b) at least two apertures disposed in predetermined locations and being substantially longitudinally oriented on at least one of the two longitudinal ends of said blade and at least one aperture on the other of the two longitudinal ends of said blade. ### Claim 2 (depends on 1) A dual utility blade as claimed in claim 1 wherein said blade is about eight to about fourteen inches in length. ### Claim 3 (depends on 1) A dual utility blade as claimed in claim 1 wherein said blade is adapted to cut metal. ### Claim 4 (depends on 1) A dual utility blade as claimed in claim 1 wherein said blade is a hacksaw blade. ### Claim 5 (depends on 1) A dual utility blade as claimed in claim 1 wherein said edge adapted to cut said object is so adapted for substantially an entirety of the length of said edge. ### Claim 6 (depends on 1) A dual utility blade as claimed in claim 1 wherein said at least two apertures include a first aperture having a diameter of about 5/32 inch and a second aperture having a diameter in the range of about 0.042 to about 0.063 inch. ### Claim 7 (depends on 6) A dual utility blade as claimed in claim 6 wherein said first aperture is located about 15/64 inch from one of said two longitudinal ends of the blade measured to center of the first aperture and about 15/64 inch from the edge adapted to cut measured perpendicularly therefrom and to an edge of said first aperture and wherein said second aperture is located about 31/64 inch from the same longitudinal end measured to center of said second aperture and 1/4 inch from the edge adapted to cut measured to center of said second aperture. ### Claim 8 A cutting device comprising: a) an elongated blade having two elongated edges one of which being adapted to cut an object; b) at least two apertures disposed in predetermined locations and being substantially longitudinally oriented on each of two longitudinal ends of said blade; c) a predetermined shearability structure adapted to facilitate shearing the blade at one or more of a plurality of predetermined locations and angles. ### Claim 9 A method for providing dual utility for a conventional hacksaw blade comprising the steps of: a) providing a hacksaw blade having two first apertures one located on each end thereof; b) enlarging one of said first apertures; c) providing a second aperture in a predetermined position relative to said enlarged aperture; d) shearing said hacksaw blade at a desired angle and distance from said enlarged aperture. ### Claim 10 (depends on 9) A method for providing dual utility for a conventional hacksaw blade as claimed in claim 9 wherein said blade includes teeth, said step of enlarging one of said first apertures being carried out subsequent to determining which end of said blade includes teeth extending theretoward and enlarging the first aperture on that end. ### Claim 11 A method for providing dual utility for a blade comprising the steps of: a) providing an elongated blade having two elongated edges one of which being adapted to cut an object and two longitudinal ends said blade having at least two apertures disposed in predetermined locations and being substantially longitudinally oriented on at least one of the two longitudinal ends of said blade and at least one aperture on the other of the two longitudinal ends of said blade; b) enlarging said two apertures; c) cutting said blade at a desired location and angle. ### Claim 12 (depends on 11) A method for providing dual utility for a blade as claimed in claim 11 wherein said enlarging step comprises enlarging a first of said two apertures from about 5/32 inch diameter to in the range of about 13/64 to about 15/64 inch diameter and a second of said two apertures from in the range of about 0.042 to about 0.063 inch diameter to in the range of about 9/64 to about 11/64 inch diameter. ### Claim 13 (depends on 12) A method for providing dual utility for a blade as claimed in claim 12 wherein said first aperture is about 7/32 inch diameter and said second aperture is about 5/32 inch diameter. ### Claim 14 A method for providing dual utility for a conventional hacksaw blade comprising the steps of: a) providing a hacksaw blade having two first apertures one located on each end thereof and creating a second aperture substantially adjacent at least one of said first apertures; b) enlarging one of said first apertures adjacent said at least one second aperture; c) enlarging said at least one second aperture adjacent the enlarged said first aperture; d) shearing said hacksaw blade at a desired angle and distance from said enlarged first and second apertures. ### Claim 15 (depends on 14) A method as claimed in claim 14 wherein said second aperture is positioned adjacent the first aperture toward which teeth on the blade extend.