US3921289A - Bladed cutting tool with removable and replaceable blade - Google Patents

Bladed cutting tool with removable and replaceable blade Download PDF

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Publication number
US3921289A
US3921289A US491853A US49185374A US3921289A US 3921289 A US3921289 A US 3921289A US 491853 A US491853 A US 491853A US 49185374 A US49185374 A US 49185374A US 3921289 A US3921289 A US 3921289A
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US
United States
Prior art keywords
blade
rod
handle
nose
knob
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
US491853A
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English (en)
Inventor
Shigeki Hasegawa
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.)
FEATHER KOGYO KK
Original Assignee
FEATHER KOGYO KK
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 FEATHER KOGYO KK filed Critical FEATHER KOGYO KK
Application granted granted Critical
Publication of US3921289A publication Critical patent/US3921289A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B5/00—Hand knives with one or more detachable blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/02—Socket, tang, or like fixings
    • B25G3/12—Locking and securing devices
    • B25G3/18—Locking and securing devices comprising catches or pawls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/02—Socket, tang, or like fixings
    • B25G3/12—Locking and securing devices
    • B25G3/32—Locking and securing devices in association with, or including, tang, bolt, or other member passing axially through whole length of handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B1/00—Hand knives with adjustable blade; Pocket knives
    • B26B1/08—Hand knives with adjustable blade; Pocket knives with sliding blade

Definitions

  • ABSTRACT A bladed cutting tool consisting of a handle slotted to receive and releasably retain and hold a cutting blade, by and in response to reciprocation within the handle of blade holding and releasing means.
  • FIG.10 FI G 11 5 M r WM 56 V I2 l4
  • FIG.12 FI G 11 5 M r WM 56 V I2 l4
  • the blade holder This invention relates to a cutting instrument consistcomprises an assembly indicated at 10. From FIG. 1 it ing essentially of a handle having means to receive and releasably retain and hold the end of a blade.
  • a further object is to provide an instrument as aforesaid, wherein change of blades may be instantly and readily made without the use of a tool.
  • Another object is to provide a tool of the nature stated which is neat, attractive and smooth in appearance and in which the blade release mechanism is concealed within the handle, except for an actuating knob forming a smooth and attractive continuation of the rearward end of the handle.
  • a further object is to afford a handle which is formed of two similar halves having planar surfaces contacting at an interface, which surfaces are grooved or channeled to conjointly define and form chambers accomodating the blade-release and retaining mechanism.
  • FIG. 1 is an exploded perspective view of the blade holder or handle with halves separated to show the blade retaining and releasing mechanism, the rearward portion of a blade being shown in dot-dash lines;
  • FIG. 2 is a vertical longitudinal section showing one handle portion, the blade holding mechanism being retracted to position releasing a blade the rearward end .of which is shown in dot-dash lines;
  • FIG. 3 is a perspective view showing the fully assembled handle and the rearward end of a blade emplaced therein but with the knob of the blade-holding means retracted to release position.
  • FIG. 4 is a vertical longitudinal section similar to FIG. 2 but showing how a blade indicated in dot-dash lines, is inserted into the handle;
  • FIG. 5 is a perspective view like FIG. 3 but showing how the release knob at the end of the handle, may be rotated to retain the release mechanism retracted;
  • FIG. 6 is a side elevation to reduced scale, showing one side of the handle with a blade secured therein;
  • FIG. 7 is an elevational view like FIG. 6, of the other side of the handle with a blade secured thereto;
  • FIG. 8 is a top plan view of a fully assembled handle and blade
  • FIG. 9 is a bottom plan view of the assembled instrument.
  • FIG. 10 is an end view looking from left to right, FIG. 6;
  • FIG. 11 is an end view looking from right to left, FIG. 6;
  • FIG. 12 is a central longitudinal section through the assembled instrument, taken in a plane normal to the plane of FIG. 8 and showing the holding mechanism in operating position.
  • the handle consists of two similar halves l4, separable in a plane generally coincident withthe plane of a flat blade 12.
  • the handle portions may be of wood, plastic, metal or other suitable rigid material.
  • the handle halves 14 are formed, each with a semicylindrical groove or channel 22 which mate when the handle is assembled, to form a guideway for slidably mounting in the axial or longitudinal direction, a push rod 16, shown as cylindrical.
  • channels 22 are enlarged or counterbored as at 24, FIGS. 1, 2 and 4, to jointly form a chamber in which slidably fits a circular flange 46 and which may be integral with rod 16 at the forward end thereof.
  • a coil spring 48 surrounds rod 16 for a free fit in counterbore 24.
  • the parts are constructed and arranged so that in the assembled handle the spring abuts flange 46 at one end and at its rearward end engages the shoulder formed by and between grooves 22 and counter-bore 24. The spring acts continuously to urge rod 16 forwardly into its blade-locking position.
  • each recess has a depth or dimension transversely of the handle, of about one-half the thickness of the blade to be used therewith, so that there is thus formed a cavity or slot into which the end of blade 12 may smoothly fit.
  • the slot formed conjointly by recesses v 26 is shaped to conform to the end of the blade.
  • a pin 28 is fixed with and protrudes from the recess in one handle half 14 and in the assembled instrument fits a bore 36 in the opposite portion. This assures accurate registration of the halves and as will be subsequently explained the pin also fits and receives a notch 30 in blade 12 when the latter is fully emplaced. The blade is thereby positively held against longitudinal or axial movement in its slot in the handle. It is contemplated in certain models more than one pin like 28 may be provided, with each pin fitting its own slot in the blade.
  • the halves of the handle are formed at the forward end of counterbore 24, with notches which register and conjointly form or define a passageway 32 opening into the rearward end of recesses 26 forming the bladereceiving slot.
  • the passageway is so shaped as to re cieve with a smooth sliding fit, a lug or nose 44 integral with or otherwise rigidly affixed to the forward end of rod 16. It is important to note from FIG. 2 that the for ward portion of nose 44 has generally fiat parallel faces which make this portion of essentially uniform thickness in the vertical direction, which thickness may gradually increase at and along the rearward portion.
  • the transverse dimension of the nose may be uniform and is greater thanthe corresponding dimension of the blade-receiving slot.
  • rod 16 is axially drilled and threaded as at 42. so that a release knob 18 may be secured thereto by a screw 56 passing through a hole 52 in the knob and threaded into the rod.
  • the handle halves are recessed at their outward rear surfaces as indicated at 57. FIGS. 1, 3 and 5.
  • the knob has spaced forwardly-extending lugs 54 integral therewith each of which has a smooth fit in a respective one of the recesses 57 when the knob is in its forward or bladelocking position.
  • the angular relation of nose 44 and lugs 54 is such that when the nose is in the position of FIGS. 1, 2, 3 and 12 about the axis of rod 16, the lugs are in registration.
  • a blade can be easily removed for sharpening, straightening or replacement with a new or used blade. No tools are required for the interchange. Blades of various lengths, shapes and purposes can be readily and quickly substituted.
  • the forward extensions 34 at and along the top of each blade half 14 are very useful, especially for long blades because these conjointly form a continuation of the upper edge of the blade-recieving slot of the handle and permit increased force or leverage on the blade, downwardly in the cutting direction. So long as the rearward end of each blade is properly shaped and notched, it can have any selected length within practicable limits and be designed and shaped for a variety of purposes such as in surgery, woodworking, household use in slicing and cutting and numerous other uses and purposes.
  • the blade may also be made with a toothed edge for sawing. Where a collection of blades is accumulated for use with a single handle, all blades may be sharpened at the same time and a material saving in costs of servicing thus effected.
  • the handle is simple to assemble. With one handle half held as in FIG. 1, rod 16 is disposed in groove 22 thereof, the rearward end of spring 48 is urged slightly forwardly until the entire spring is seated in counterbore 24. With the spring thus slightly compressed the other half is moved into registering contact with the first half and'screws 38 are inserted and threaded down until the two halves are in unitary contact. Disassembly of the handle for repairs or servicing is equally easy.
  • a handle for releasably holding a flat blade comprising two essentially similar halves secured together at an essentially planar interface and conjointly defining a central longitudinal passageway and a bladereceiving slot forwardly of the passageway, a rod axially slidable in and along said passageway, said rod extending rearwardly to protrude slightly from the end of the handle, a nose fixed with the forward end of said-rod and axially movable with the same from a first forward position engageable with a blade fitting said slot, to a second retracted position free of .the blade, a knob fixed to said protruding end and operable to move said rod and nose between first and second positions, and lug means carried by said knob to engage said handle and hold said rod in second and retracted position when said rod,-nose and knob are retracted and rotated as a unit through a predetermined angle.
  • said pin being located forwardly in said extension.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Knives (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
US491853A 1974-03-04 1974-07-25 Bladed cutting tool with removable and replaceable blade Expired - Lifetime US3921289A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1974025741U JPS5250079Y2 (enrdf_load_stackoverflow) 1974-03-04 1974-03-04

Publications (1)

Publication Number Publication Date
US3921289A true US3921289A (en) 1975-11-25

Family

ID=12174236

Family Applications (1)

Application Number Title Priority Date Filing Date
US491853A Expired - Lifetime US3921289A (en) 1974-03-04 1974-07-25 Bladed cutting tool with removable and replaceable blade

Country Status (5)

Country Link
US (1) US3921289A (enrdf_load_stackoverflow)
JP (1) JPS5250079Y2 (enrdf_load_stackoverflow)
DE (1) DE2451917C3 (enrdf_load_stackoverflow)
GB (1) GB1449407A (enrdf_load_stackoverflow)
SE (1) SE409429B (enrdf_load_stackoverflow)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4202095A (en) * 1977-12-07 1980-05-13 Hilaire Gingras Steak knife
US4344724A (en) * 1979-10-11 1982-08-17 Mapal Fabrik Fur Prazisionswerkzeuge Dr. Kress Kg Cutting tool assembly
USD308624S (en) 1987-10-02 1990-06-19 David Zimet Cutting tool
USD473121S1 (en) 2002-05-02 2003-04-15 Acey Sebren Eads Utility knife
WO2003089195A1 (en) * 2002-04-18 2003-10-30 Benchmade Knife Co. Method and apparatus for securing a handle to a knife tang
US20090313781A1 (en) * 2008-06-23 2009-12-24 Marvin Gray Spring-loaded bladed hand tool
US20120246946A1 (en) * 2011-03-31 2012-10-04 Thomas Kreitz Knife With a Metal End Cap and Method for Fixing the End Cap
US20160066735A1 (en) * 2014-09-05 2016-03-10 Progressive International Corporation Peeler
US9622773B2 (en) 2012-03-19 2017-04-18 Aspen Surgical Products, Inc. Side activated safety scalpel for left and right hand users with blade removal system
US9693797B2 (en) 2014-03-07 2017-07-04 Aspen Surgical Products, Inc. Scalpel handle sheath with blade remover
USD800905S1 (en) 2015-03-06 2017-10-24 Aspen Surgical Products, Inc. Scalpel handle sheath
CN107791282A (zh) * 2017-10-26 2018-03-13 尚李玲 一种新型裁纸刀的刀头结构
USD813390S1 (en) 2016-01-15 2018-03-20 Aspen Surgical Products, Inc. Surgical scalpel blade attachment
CN108006155A (zh) * 2017-12-02 2018-05-08 黑龙江云要印电子商务有限公司 一种设备减震装置中的快捷弹簧更换机构
US10299825B2 (en) 2014-10-03 2019-05-28 Aspen Surgical Products, Inc. Sharps blade applicator and storage device
US11278310B2 (en) 2016-03-21 2022-03-22 Aspen Surgical Products, Inc. Safety scalpel handle
US20220168910A1 (en) * 2019-02-28 2022-06-02 Belair Instrument Company, Llc Trimsafe histology radius blade grossing knife
US11707857B2 (en) * 2012-10-26 2023-07-25 Outdoor Edge Cutlery, Llc Knife with replaceable blade
US11945126B1 (en) * 2023-09-19 2024-04-02 Microtech Knives, Inc. Pocket knife
USD1020426S1 (en) 2013-10-25 2024-04-02 Outdoor Edge Cutlery, Llc Knife
USD1046591S1 (en) 2023-07-14 2024-10-15 Outdoor Edge Cutlery, Llc Blade holder
USD1046589S1 (en) 2023-07-14 2024-10-15 Outdoor Edge Cutlery, Llc Knife handle
USD1047657S1 (en) 2023-07-14 2024-10-22 Outdoor Edge Cutlery, Llc Knife handle
USD1047654S1 (en) 2023-07-14 2024-10-22 Outdoor Edge Cutlery, Llc Blade holder
USD1047656S1 (en) 2023-07-14 2024-10-22 Outdoor Edge Cutlery, Llc Knife handle
USD1086841S1 (en) 2024-07-22 2025-08-05 Outdoor Edge Cutlery, Llc Knife blade

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095511A1 (de) * 1982-05-27 1983-12-07 Dr. Hinz Labor, Fachlaboratorium für Kieferorthopädie GmbH Vorrichtung zur Pflege der Zähne
FR2561563B1 (fr) * 1984-03-20 1989-01-20 Cotte Andre Piece constituee de deux moities complementaires bloquees l'une par rapport a l'autre, son procede de fabrication et manche de couvert realise a l'aide d'une telle piece
DE8712318U1 (de) * 1987-09-11 1989-01-12 Klotz, Manfred, 4790 Paderborn Schneidmesser
JP7039016B2 (ja) * 2018-03-22 2022-03-22 有限会社ストカ ジョイント構造及び道具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1448730A (en) * 1921-06-24 1923-03-20 William J Davis Sharpening device for safety-razor blades
US2109108A (en) * 1935-08-19 1938-02-22 Douglas F Fesler Knife
US2256032A (en) * 1939-07-06 1941-09-16 Frank E Mckee Hollow-ground safety razor blade and sharpener
US3308533A (en) * 1964-10-08 1967-03-14 Barth A Holohan Barber's razor with holder for exchangeable blades

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1448730A (en) * 1921-06-24 1923-03-20 William J Davis Sharpening device for safety-razor blades
US2109108A (en) * 1935-08-19 1938-02-22 Douglas F Fesler Knife
US2256032A (en) * 1939-07-06 1941-09-16 Frank E Mckee Hollow-ground safety razor blade and sharpener
US3308533A (en) * 1964-10-08 1967-03-14 Barth A Holohan Barber's razor with holder for exchangeable blades

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4202095A (en) * 1977-12-07 1980-05-13 Hilaire Gingras Steak knife
US4344724A (en) * 1979-10-11 1982-08-17 Mapal Fabrik Fur Prazisionswerkzeuge Dr. Kress Kg Cutting tool assembly
USD308624S (en) 1987-10-02 1990-06-19 David Zimet Cutting tool
WO2003089195A1 (en) * 2002-04-18 2003-10-30 Benchmade Knife Co. Method and apparatus for securing a handle to a knife tang
US20030221323A1 (en) * 2002-04-18 2003-12-04 Deasis Les Method and apparatus for securing a handle to a knife tang
USD473121S1 (en) 2002-05-02 2003-04-15 Acey Sebren Eads Utility knife
US20090313781A1 (en) * 2008-06-23 2009-12-24 Marvin Gray Spring-loaded bladed hand tool
US20120246946A1 (en) * 2011-03-31 2012-10-04 Thomas Kreitz Knife With a Metal End Cap and Method for Fixing the End Cap
US9622773B2 (en) 2012-03-19 2017-04-18 Aspen Surgical Products, Inc. Side activated safety scalpel for left and right hand users with blade removal system
US10292729B2 (en) 2012-03-19 2019-05-21 Aspen Surgical Products, Inc. Side activated safety scalpel for left and right hand users with blade removal system
USD1023715S1 (en) 2012-10-26 2024-04-23 Outdoor Edge Cutlery, Llc Knife
US11780102B2 (en) 2012-10-26 2023-10-10 Outdoor Edge Cutlery, Llc Folding knife with replaceable blade
US11707857B2 (en) * 2012-10-26 2023-07-25 Outdoor Edge Cutlery, Llc Knife with replaceable blade
USD1020426S1 (en) 2013-10-25 2024-04-02 Outdoor Edge Cutlery, Llc Knife
US10201369B2 (en) 2014-03-07 2019-02-12 Aspen Surgical Products, Inc. Scalpel handle sheath with blade remover
US10806485B2 (en) 2014-03-07 2020-10-20 Aspen Surgical Products, Inc. Scalpel handle sheath with blade remover
US9693797B2 (en) 2014-03-07 2017-07-04 Aspen Surgical Products, Inc. Scalpel handle sheath with blade remover
US20160066735A1 (en) * 2014-09-05 2016-03-10 Progressive International Corporation Peeler
US10104998B2 (en) * 2014-09-05 2018-10-23 Progressive International Corporation Peeler
US10299825B2 (en) 2014-10-03 2019-05-28 Aspen Surgical Products, Inc. Sharps blade applicator and storage device
USD854685S1 (en) 2015-03-06 2019-07-23 Aspen Surgical Products, Inc. Scalpel handle sheath
USD800905S1 (en) 2015-03-06 2017-10-24 Aspen Surgical Products, Inc. Scalpel handle sheath
USD813390S1 (en) 2016-01-15 2018-03-20 Aspen Surgical Products, Inc. Surgical scalpel blade attachment
US11278310B2 (en) 2016-03-21 2022-03-22 Aspen Surgical Products, Inc. Safety scalpel handle
CN107791282A (zh) * 2017-10-26 2018-03-13 尚李玲 一种新型裁纸刀的刀头结构
CN108006155A (zh) * 2017-12-02 2018-05-08 黑龙江云要印电子商务有限公司 一种设备减震装置中的快捷弹簧更换机构
US20220168910A1 (en) * 2019-02-28 2022-06-02 Belair Instrument Company, Llc Trimsafe histology radius blade grossing knife
USD1047657S1 (en) 2023-07-14 2024-10-22 Outdoor Edge Cutlery, Llc Knife handle
USD1046591S1 (en) 2023-07-14 2024-10-15 Outdoor Edge Cutlery, Llc Blade holder
USD1046589S1 (en) 2023-07-14 2024-10-15 Outdoor Edge Cutlery, Llc Knife handle
USD1047654S1 (en) 2023-07-14 2024-10-22 Outdoor Edge Cutlery, Llc Blade holder
USD1047656S1 (en) 2023-07-14 2024-10-22 Outdoor Edge Cutlery, Llc Knife handle
US11945126B1 (en) * 2023-09-19 2024-04-02 Microtech Knives, Inc. Pocket knife
EP4566773A3 (en) * 2023-09-19 2025-08-06 Microtech Knives, Inc. Pocket knife
USD1086841S1 (en) 2024-07-22 2025-08-05 Outdoor Edge Cutlery, Llc Knife blade

Also Published As

Publication number Publication date
GB1449407A (en) 1976-09-15
SE409429B (sv) 1979-08-20
DE2451917A1 (de) 1975-09-11
DE2451917C3 (de) 1981-07-23
DE2451917B2 (de) 1980-10-09
JPS50115700U (enrdf_load_stackoverflow) 1975-09-20
JPS5250079Y2 (enrdf_load_stackoverflow) 1977-11-14
SE7412179L (enrdf_load_stackoverflow) 1975-09-05

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