US3339282A - Power operated knife blades driving and retaining means - Google Patents

Power operated knife blades driving and retaining means Download PDF

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Publication number
US3339282A
US3339282A US522550A US52255066A US3339282A US 3339282 A US3339282 A US 3339282A US 522550 A US522550 A US 522550A US 52255066 A US52255066 A US 52255066A US 3339282 A US3339282 A US 3339282A
Authority
US
United States
Prior art keywords
blade
retainer
driver
tang
retaining means
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
US522550A
Other languages
English (en)
Inventor
John M Hansen
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.)
Scovill Inc
Original Assignee
Scovill Inc
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 Scovill Inc filed Critical Scovill Inc
Priority to US522550A priority Critical patent/US3339282A/en
Priority to GB24725/66A priority patent/GB1100363A/en
Priority to CH830266A priority patent/CH445331A/fr
Priority to BE682344D priority patent/BE682344A/xx
Priority to SE8471/66A priority patent/SE304583B/xx
Priority to ES0329097A priority patent/ES329097A1/es
Priority to NL6609966A priority patent/NL6609966A/xx
Application granted granted Critical
Publication of US3339282A publication Critical patent/US3339282A/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
    • B26B7/00—Hand knives with reciprocating motor-driven blades
    • B26B7/005—Counter reciprocating blades

Definitions

  • This invention relates to power operated knives of the type provided with a pair of reciprocated removable blades, and more particularly to means for driving and retaining the blades in such knives.
  • the main object of the invention is to produce blade retaining means which hold the blades firmly in their intended positions in the knife handles when the knives are in use, and which permit of removal of the blades when desired.
  • the retaining means comprise a pair of rigid plates designed to have pivotal movements about a non-fixed fulcrum for the purpose of releasing the blade tangs in response to actuation of a blade release button, and designed to have limited bodily movement which permits insertion of the blades into their retained positions.
  • the blade retaining means of my invention comprises a pair of rigid plates each loosely mounted in one of a pair of blade driver-carriers, urged by a specially formed leaf spring into tang engaging position.
  • the form of the rigid plates and the novel mounting thereof in the drivercarriers permits of pivotal movement of the plates about substantially horizontal fulcrums parallel to the longitudinal axis of the knife housing, which occurs when a blade release button is actuated. Bodily movement of the retainer plates occurs when blade tangs are inserted into the blade carrier portion of the drivers, said plates being automatically returned to tang engaging and retaining positions when the blades have been inserted a predetermined distance into the knife housing.
  • FIG. 1 is an elevational side view of the forward end of a power operated knife embodying my invention, the housing having been broken away to expose one of the blade drivers and retaining means.
  • FIG. 2 is a transverse vertical sectional view in the plane of the line 22 of FIG. 1, showing the blade retaining means in their tang engaging positions.
  • FIG. 3 is a view similar to FIG. 2, but showing the blade retaining means released from tang engagement by a blade release button.
  • FIG. 4 is a horizontal longitudinal sectional view in the plane of the line 44 of FIG. 2.
  • FIG. 5 is an exploded isometric view of the two driver members, with their rearward portions broken away, showing one retainer plate and leaf spring detached, and the other retainer plate mounted in the driver at the left of the figure.
  • a knife housing has mounted therein the tangs 11 of a pair of blades 12.
  • Each tang 11 has formed on its outer side surface a projection 13 for engagement with the retainer plate hereinafter described.
  • Blade drivers 14, 15, each comprise a forward blade carrier member 16, 17, respectively, and a rearward portion 18, 19, respectively, engaged by motor driven eccentrics 20, whereby the drivers are reciprocated in opposite directions relatively to each other.
  • a carrier member 3,339,282 Patented Sept. 5, 1967 and portion of each driver are rigidly connected together by rivets 21.
  • Registering openings 22, 23, are located in the connected side walls of the carriers and drivers, the openings being generally rectangular in shape.
  • the drivers 14, 15, are made of metal and have ears 24 directed toward each other extending from the edges of the driver walls at opposite ends of the openings 23.
  • a rigid retainer plate 25 is loosely mounted in each of the carrier-driver members 14, 15, being located adjacent the outer side of the driver and having a portion extending through the registering openings 23 of the driver and 22 of the carrier.
  • the retainer plate 25 is made of a rectangular piece of metal bent and shaped as shown in FIG. 5 to form a horizontal fulcrum member 26, vertical wall 27, inwardly directed horizontal wall 28, downwardly extending tang-contacting member 29, outwardly directed horizontal wall 30, downwardly extending outer wall 31, blade release button-contacted member 32 and terminal edge portion 33.
  • the parts 28, 29 and 30 project inwardly through the openings 22, 23, so that the member 29 faces the blade tangs 11.
  • the parts 26, 27, 31, 32, and 33 are located on the outer side of the driver.
  • the metal forming the parts 28, 29 and 30 is shaped to make the tang-contacting member 29 slightly curved as best shown in FIG. 4, and the horizontal walls 28, 30 are correspondingly shaped to be slightly wider midway between their ends than they are adjacent their ends.
  • the slot 34 extends vertically in the tang-contacting member 29 and then horizontally into the middle of the horizontal wall 28 as shown in FIG. 6, for the purpose of receiving the tang projection 13 when the blade is inserted between the two carrier-driver members and for permitting disengagement of the tang projections from the retainers 25.
  • the retainer plate 25 is installed from the outer side of a driver-carrier 14 or 15, with the tang-contacting member 29 and its horizontal walls 28 and 30 extending through the openings 23, 22, with the fulcrum member 26 resting on the upper edge of the driver 18 or 19, and the blade release button-contacted member 32 extending downwardly beyond the driver-carrier for engagement by a blade-release button described hereinafter.
  • the installation is facilitated by the small notches 35 at opposite ends of the member 29, permitting the said member 29 to pass the ears 24 which project into the driver wall opening 23.
  • a leaf spring 36 shaped as shown in FIG. 5, is inserted between the horizontal walls 28 and 30 of the retainer 25, with the ends of the spring retained behind the ears 24 as shown in FIG. 4.
  • a blade release button 40 as a whole, is shown in this embodiment as mounted in the lower wall of the housing 10.
  • the button 40 comprises an exposed manually depressible member 41, stud 42, spring 43 surrounding the stud, and conical head 44 for contacting the parts 32 of the retainer plates 25, as shown in FIGS. 2 and 3.
  • the blade release button 40 fits within the recess formed in the walls 45 of the housing 10, the space 46 permitting the button 41 to be depressed relatively to the housing, to thereby move the head 44 upwardly into contact with the retainer plates 25.
  • the blade release button 40 may be located in either the top or bottom wall of the housing. If located in the top of the housing, the blade drivers-carriers together with their retainer plates 25 are turned upside down but otherwise function as described and shown herein, where the button 40 is located in the bottom wall.
  • the operation of the blade drivers and retainers is as follows: When the blade tangs 11 are inserted between the carriers 16, 17, the projections 13 on the outer surfaces of the tangs come into contact with the curved surfaces of the members 29 of the retainers 25. This movement of the housing 10, causes the retainer plates 25 to move bodily slightly until the tang projections 13 snap into the slots 34 of the plates 25, whereupon the retainer plates 25 resume their normal position by the pressure of spring 36.
  • the retainer plates 25 maintain their blade holding positions as shown in FIG. 2 until the blade release button is actuated, whereupon the conical head 44 moves upwardly between the parts 32 of the retainers as shown in FIG. 3. This movement causes pivotal movements of the plates 25 about horizontal fulcrums 26, thereby disengaging the retainers from the projections 13 of the tangs 11 and allowing the blades to be withdrawn.
  • Power operated knife blades driving and retaining means comprising (a) a knife handle housing,
  • said blade retainers being bodily movable when contacted by blade tangs inserted between them, and pivotally movable about said fulcrums when engaged by blade release means between them.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Binders And Loading Units For Sheaves (AREA)
US522550A 1966-01-24 1966-01-24 Power operated knife blades driving and retaining means Expired - Lifetime US3339282A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US522550A US3339282A (en) 1966-01-24 1966-01-24 Power operated knife blades driving and retaining means
GB24725/66A GB1100363A (en) 1966-01-24 1966-06-02 Improvements in or relating to power operated knife blade driving and retaining means
CH830266A CH445331A (fr) 1966-01-24 1966-06-09 Mécanisme d'entraînement et de retenue pour les lames d'un couteau électrique
BE682344D BE682344A (fr) 1966-01-24 1966-06-09
SE8471/66A SE304583B (fr) 1966-01-24 1966-06-21
ES0329097A ES329097A1 (es) 1966-01-24 1966-07-14 Dispositivo de accionamiento y retencion de hojas de un cuchillo accionado mecanicamente.
NL6609966A NL6609966A (fr) 1966-01-24 1966-07-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US522550A US3339282A (en) 1966-01-24 1966-01-24 Power operated knife blades driving and retaining means

Publications (1)

Publication Number Publication Date
US3339282A true US3339282A (en) 1967-09-05

Family

ID=24081307

Family Applications (1)

Application Number Title Priority Date Filing Date
US522550A Expired - Lifetime US3339282A (en) 1966-01-24 1966-01-24 Power operated knife blades driving and retaining means

Country Status (7)

Country Link
US (1) US3339282A (fr)
BE (1) BE682344A (fr)
CH (1) CH445331A (fr)
ES (1) ES329097A1 (fr)
GB (1) GB1100363A (fr)
NL (1) NL6609966A (fr)
SE (1) SE304583B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5778541A (en) * 1997-03-28 1998-07-14 Mcclung; Robert K. Pro pumpkin carver
US6185826B1 (en) 1999-05-13 2001-02-13 Scott Lutz Electric slicing knife with switch guard
US20040139617A1 (en) * 2003-01-16 2004-07-22 Mike Neshat Blades for electric knife

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158770A (en) * 1984-04-13 1985-11-20 Jeffrey Berman Power saw

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US938584A (en) * 1908-10-30 1909-11-02 Charles A Hunt Sash-fastener.
US3307259A (en) * 1964-06-22 1967-03-07 Scovill Manufacturing Co Power operated knife

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US938584A (en) * 1908-10-30 1909-11-02 Charles A Hunt Sash-fastener.
US3307259A (en) * 1964-06-22 1967-03-07 Scovill Manufacturing Co Power operated knife

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5778541A (en) * 1997-03-28 1998-07-14 Mcclung; Robert K. Pro pumpkin carver
US6185826B1 (en) 1999-05-13 2001-02-13 Scott Lutz Electric slicing knife with switch guard
US20040139617A1 (en) * 2003-01-16 2004-07-22 Mike Neshat Blades for electric knife

Also Published As

Publication number Publication date
SE304583B (fr) 1968-09-30
ES329097A1 (es) 1967-05-01
GB1100363A (en) 1968-01-24
NL6609966A (fr) 1967-07-25
BE682344A (fr) 1966-12-09
CH445331A (fr) 1967-10-15

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