US3774301A - Cutters - Google Patents

Cutters Download PDF

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Publication number
US3774301A
US3774301A US00220179A US3774301DA US3774301A US 3774301 A US3774301 A US 3774301A US 00220179 A US00220179 A US 00220179A US 3774301D A US3774301D A US 3774301DA US 3774301 A US3774301 A US 3774301A
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US
United States
Prior art keywords
cutting edges
cutting
arm members
cutter
blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00220179A
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English (en)
Inventor
F Brown
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3774301A publication Critical patent/US3774301A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D29/00—Hand-held metal-shearing or metal-cutting devices
    • B23D29/02—Hand-operated metal-shearing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact

Definitions

  • Two cooperating arm members formed from lightweight sheet metal stampings and each incorporating a ramped bladesection and a handle portion, are pivotably interconnected alonga pivot axis with the sharp cutting edges of the blade sections axially spaced apart from each other to assureoverlapping of the blade cutting edges, thereby forming a unique cutter specifically applicable to shearing of small diameter wires, fibers, plastics, and the like.
  • the cutting edge of one of the ramped blade sections contacts the other ramped blade section and slidingly advances thereon, providing assurance that a particular item is completely cut, even when the cutting edges of the blades have been dulled from use.
  • This invention relates to cutters, and more particularly to cutters for use with small diameter wires, fibers, plastics, and the like.
  • the wire is generally flattened instead of being severed, with a flat head remaining on the wire.
  • V-type cutters Another problem prevalent with prior art V-type cutters is partially cut wires, which generally occur when the cutting blades have become dull or nicked.
  • Another object of this invention is to provide cutters of the above character which are completely effective in cutting small diameter wires without leaving unwanted edges.
  • Another object of this invention is to provide a cutter of the above character which is easily handled and manipulated.
  • a further object of this invention is to provide a cutter of the above character which is not only effective, but also inexpensive to manufacture.
  • the cutters of this invention are capable of assuring complete cutting of small diameter wires, fibers, plastics, and the like, even when the cutting edges are dull or nicked, by arranging the cutting edges so that they do not contact each other.
  • the cutting edges are free to move independently of each other.
  • one of the edges slidingly advances on the beveled surface of the other blade portion. This allows the cutting edges of the blades to overlap each other by a specifically controlled amount. This overlap cutting action assures a complete cut of the item regardless of the condition of the cutting surface.
  • FIG. 1 is a fragmentary plan view of the cutters of this invention
  • FIG. 2 is a fragmentary side elevation view of the cutters of FIG. 1;
  • FIG. 3 is a cross sectional end view of the cutting surface of the cutters of this invention taken along line 3-3 of FIG. 1;
  • FIGS. 4 through 6 are cross sectional end views similar to that of FIG. 3, showing the progressive steps as the cutting surfaces of the cutters of this invention are brought into contact with each other, and
  • FIG. 7 is a greatly enlarged cross sectional view of a portion of the cutting surfaces of FIG. 6.
  • Cutter 20 is constructed from a pair of arm members 22 and 24, which are pivotably interconnected by rivet 30 having a pivot axis 31.
  • Arm member 22 comprises an end portion 23 and a handle portion 19, indicated by dash lines in FIG. 1.
  • Arm member 24 comprises an end portion 25 and a handle portion 21, also indicated by dash lines in FIG. 1.
  • Arm members 22 and 24 are die stamped from a single piece of lightweight sheet metal, and the arm members virtually comprise mirror images of each other, except for their ofiset blade portions. End portions 23 and 25 of arm members 22 and 24 are then ground to form sharp cutting edges 42 and 46 along blade sections 26 and 27.
  • arm member 22 comprises the lower member of cutter 20
  • its end portion 23 merely incorporates a gentle upward slope, best seen in FIG. 2.
  • arm member 24 is the upper member of cutter 20
  • am member 24 incorporates a downward sloping offset portion 28 between rivet 30 and its end portion 25.
  • End portion 25 is shaped to be in substantially the same plane as end portion 23 of arm member 22.
  • Arm member 22 and 24 of cutter 20 are free to pivot about axis 31 of interconnecting rivet 30 and, for convenience, are optionally biased apart by a torsion spring 32, having an axis 33 near pivot axis 31.
  • a torsion spring 32 having an axis 33 near pivot axis 31.
  • One leg of spring 32 is connected to arm member 22 by a rivet 34, while the other leg of spring 32 is connected to arm member 24 by a rivet 36.
  • the spring tension of spring 32 is easily overcome with a minimum of effort, and is merely incorporated for-the convenience of the user to assure separation of blade sections 26 and 27 from each other after a wire has been cut.
  • spring 32 is optional, the incorporation of spring 32 on cutter 20 eliminates the need for the user of cutter 20 to manually separate blade sections 26 and 27 after an item has been cut.
  • stop 38 may take many configurations, such as stamped raised legs, one such configuration may comprise a circular boss eccentrically mounted on arm 22 for adjustable-stop action. As arms 22 and 24 are advanced toward each other causing blade sections 26 and 27 to come into cutting juxtaposition with each other, edge 39 of arm 24 approaches abutting contact with stop 38. As will be more clearly explained below, the cutting edges of blade sections 26 and 27 overlap each other with the cutting edge of one sliding along the ramp portion of the other. By changing the position of stop 38, the arch through which arm 24 can swing before edge 39 abuts stop 38 can be preset.
  • Blade section 26 incorporates a cutting edge 42 and a ramp section 44, while blade section 27 incorporates a cutting edge 46 and a ramp portion 48.
  • cutting edge 42 of blade section 26 is axially spaced apart a dis tance A from cutting edge 46 of blade section 27, as shown in FIG. 3.
  • distance A can be varied, depending upon the desired results, in the preferred embodiment the distance A is approximately 0.001 inches.
  • cutting edge 42 of blade section 26 is designed to approach ramp surface 48 of blade section 27, near but displaced from cutting edge 46 of blade section 27.
  • the two cutting edges are designed to merely contact each other.
  • ramp surface 48 is sloped, and cutting edge 42 is juxtaposed to ride up ramp surface 48.
  • cutting edge 42 of blade section 26 cammingly slides along ramp surface 48 of blade section 27.
  • the distance B between cutting edges 42 and 46 when blade sections 26 and 27 have been squeezed tightly together is substantially greater than the axial edge separation distance A shown in FIG. 3.
  • the cutters of this invention have a selfsharpening effect, shown in FIG. 7. As cutting edge 42 repeatedly, cammingly slides up ramp surface 48 of blade section 27, cutting edge 42 undergoes a selfsharpening or burnishing effect, which produces and maintains a sharp cutting edge 42A. This provides assurance that the cutters of this invention will always be sharp, and will always produce a complete and accurate severence of the desired item.
  • a cutter comprising:
  • a cutter as defined in claim 1, further comprising a torsion spring having an axis near said pivot axis and two legs respectively mounted to each of said pair of arm members for maintaining said cutting edges apart when no pressure is applied to said arm members.
  • a cutter as defined in claim 1, further comprising stop means mounted to one of said arm members for lifting the arc through which the other of said arm members may move when said cutting edges are closely juxtaposed to each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Knives (AREA)
  • Scissors And Nippers (AREA)
US00220179A 1972-01-24 1972-01-24 Cutters Expired - Lifetime US3774301A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22017972A 1972-01-24 1972-01-24

Publications (1)

Publication Number Publication Date
US3774301A true US3774301A (en) 1973-11-27

Family

ID=22822402

Family Applications (1)

Application Number Title Priority Date Filing Date
US00220179A Expired - Lifetime US3774301A (en) 1972-01-24 1972-01-24 Cutters

Country Status (5)

Country Link
US (1) US3774301A (enrdf_load_stackoverflow)
JP (1) JPS4886200A (enrdf_load_stackoverflow)
DE (1) DE2303375A1 (enrdf_load_stackoverflow)
FR (1) FR2169163B1 (enrdf_load_stackoverflow)
GB (1) GB1408655A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400876A (en) * 1981-10-26 1983-08-30 Brown Frank R Spring devices
DE3604897A1 (de) * 1985-04-02 1986-10-02 Ars Edge Co. Ltd., Sakai, Osaka Schere
US20040133989A1 (en) * 2003-01-13 2004-07-15 The Stanley Works Tool with inserted blade members
US11278949B2 (en) * 2015-04-02 2022-03-22 Milwaukee Electric Tool Corporation PEX crimping tool
US20220395992A1 (en) * 2021-06-15 2022-12-15 Marshalltown Company Tile Nipper

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147534B (en) * 1983-10-07 1987-11-25 Wallace Mfg Cutting device
DE8330495U1 (de) * 1983-10-22 1984-01-19 Belzer-Dowidat Gmbh Werkzeug-Union, 5600 Wuppertal Zange
JPS61137381U (enrdf_load_stackoverflow) * 1985-02-15 1986-08-26
US20120005902A1 (en) * 2010-07-08 2012-01-12 Fist Way Industrial Co., Ltd. Wire cutter head for preventing misalignment of the cutting blades

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US496584A (en) * 1893-05-02 Cutting-nippers
US1168051A (en) * 1915-10-29 1916-01-11 William Schollhorn Co Hand-tool.
US1578438A (en) * 1921-03-05 1926-03-30 Herman R Hintz Pincers
US3398451A (en) * 1966-06-27 1968-08-27 Crescent Niagara Corp Spring opened nipper

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4430320Y1 (enrdf_load_stackoverflow) * 1965-11-18 1969-12-13

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US496584A (en) * 1893-05-02 Cutting-nippers
US1168051A (en) * 1915-10-29 1916-01-11 William Schollhorn Co Hand-tool.
US1578438A (en) * 1921-03-05 1926-03-30 Herman R Hintz Pincers
US3398451A (en) * 1966-06-27 1968-08-27 Crescent Niagara Corp Spring opened nipper

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400876A (en) * 1981-10-26 1983-08-30 Brown Frank R Spring devices
DE3604897A1 (de) * 1985-04-02 1986-10-02 Ars Edge Co. Ltd., Sakai, Osaka Schere
US20040133989A1 (en) * 2003-01-13 2004-07-15 The Stanley Works Tool with inserted blade members
WO2004065075A3 (en) * 2003-01-13 2005-03-24 Stanley Works Tool with inserted blade members
US7111376B2 (en) 2003-01-13 2006-09-26 The Stanley Works Tool with inserted blade members
CN1756628B (zh) * 2003-01-13 2010-04-28 斯坦利公司 具有插入的刀片构件的工具
US11278949B2 (en) * 2015-04-02 2022-03-22 Milwaukee Electric Tool Corporation PEX crimping tool
US20220395992A1 (en) * 2021-06-15 2022-12-15 Marshalltown Company Tile Nipper

Also Published As

Publication number Publication date
DE2303375A1 (de) 1973-08-09
FR2169163B1 (enrdf_load_stackoverflow) 1977-04-22
JPS4886200A (enrdf_load_stackoverflow) 1973-11-14
GB1408655A (en) 1975-10-01
FR2169163A1 (enrdf_load_stackoverflow) 1973-09-07

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