USRE43908E1 - Dual handle safety folding knife - Google Patents
Dual handle safety folding knife Download PDFInfo
- Publication number
- USRE43908E1 USRE43908E1 US12/806,515 US80651510A USRE43908E US RE43908 E1 USRE43908 E1 US RE43908E1 US 80651510 A US80651510 A US 80651510A US RE43908 E USRE43908 E US RE43908E
- Authority
- US
- United States
- Prior art keywords
- handle
- blade
- portions
- shank
- spring
- 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 - Fee Related, expires
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Classifications
-
- 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
- B26B1/02—Hand knives with adjustable blade; Pocket knives with pivoted blade
- B26B1/04—Hand knives with adjustable blade; Pocket knives with pivoted blade lockable in adjusted position
Definitions
- This invention relates to knives, specifically folding knives that have a blade attached to a pivoting handle. Such knives typically lock in open use or closed position with the blade stored within or partially within the handle.
- a dual handle knife or “butterfly, fighting” knife typically has a pair of pivoting handles, each of which covers one-half the blade in folded closed position and forms a full hand grip in open use position.
- a synchronized folding knife is seen in U.S. Pat. No. 4,547,965 having a pair of channel handles that are pivotally connected to a knife blade with mesh gears.
- U.S. Pat. No. 6,195,898 is directed to a magnetically locking butterfly fighting knife having a pair of magnets on the respective end handle portions so as to be magnetically attracted to one another in either open or in closed position due to the corresponding positioning of the plurality of the magnets.
- a locking dual handle “butterfly type fighting knife” having a pair of integral blade engaging elongated spring urged handle elements that selectively engage a compound configured surface of pivoted handle engagement points.
- Such multiple selective sequential registration provides for positive multiple handle positions that are sequentially engaged from a locked closed position to intermediate and then to an open use locked positions.
- Handle interengagement portions prevent translateral movement of the handle elements with one another when in open use position.
- FIG. 1 is a side elevational view of the knife of the invention in open use position.
- FIG. 2 is a partial enlarged side elevational view of the improved handle and blade configurations of the invention in open use locked position.
- FIG. 3 is a side elevational view of the knife as seen in closed locked position.
- FIG. 4 is an enlarged side elevational view with portions broken away illustrating intermediate handle positions.
- FIG. 5 is an enlarged side elevational view with portions broken away in open use position illustrating blade shank pivot surface engagement with respective handle portions.
- FIG. 6 is a side elevational view of the blade handle spring elements in open independent position.
- FIG. 7 is a side elevational view of the blade handle spring elements in closed independent position orientation.
- a folding knife 10 of the invention can be seen having a blade portion 11 and a handle portion 12 .
- the blade portion 11 has a blade element 13 with an end point 14 , back edge 15 and oppositely disposed cutting edge 16 .
- a shank 17 of the blade has bifurcated handle engagement shank portions 18 A and 18 B with respective pivot apertures 19 A and 19 B therewithin,
- Each of the shank portions 18 A and 18 B have different angled engagement surfaces 20 with the shank portion 18 B having a tapered outside edge 21 with a right angular end edge 22 .
- An angularly disposed return edge 23 terminates at a joining end edge 24 extending between the respective bifurcated end portions.
- the shank portion 18 A has an outside tapered edge 25 with a right angled end edge 26 .
- a corresponding return edge 27 has an angularly disposed surface effacing the hereinbefore described return edge 23 and terminates in the corresponding adjoining end edge 24 , as noted.
- the handle portion 12 is comprised of a pair of independent handle elements 28 and 29 , best seen in FIGS. 1 , 2 and 3 of the drawings which are pivotally secured to the respective shank portions 18 A and 18 B by pivot pins 30 A and 30 B respectively.
- Each of the handle elements 28 and 29 have elongated compound shaped spring plates 31 and 32 respectively, best seen in dotted lines and independently in solid lines in FIGS. 6 and 7 of the drawings.
- the spring plates 31 and 32 have engagement end portions 33 and 34 and are secured to the respective handle elements 28 and 29 by multiple fasteners F positioned along their longitudinal length.
- the spring plate end engagement portions 33 and 34 are registerable on the respective effacing shank portion's angled surfaces 23 and 27 and the handle element pairs 28 and 29 are engaged with one another for use.
- a spring plate portion 35 interlocks the free ends of the handle portions 28 and 29 as best seen in FIG. 2 of the drawings preventing handle translateral movement therebetween.
- the respective engagement surfaces of the end engagement portions 33 and 34 impart a co-lateral force on the incline return surfaces 23 and 27 of the shank portions 18 A and 18 B due to their angular inclination thus maintaining a secure lock position in the open configuration.
- the handle portions 28 and 29 are respectively engaged over the back of the blade edge 15 and cutting edge 16 of the blade 13 .
- the spring end plate portions 33 and 34 are now in contact with the corresponding outer surfaces 21 and 25 of the shank portions 18 A and 18 B which due to their angular inclination as previously described will force the handles 28 and 29 together, holding the handles tightly closed on the blade 13 as described.
- the spring plate 32 has an extending blade stop 40 inwardly of its end engagement portion 34 that prevents the blade 13 upon full closure of the handle 29 thereon from engagement with the cutting edge 16 by spaced contact therewith indicated generally at 41 .
- the handle portion 28 is held tightly against the back edge 15 of the blade 13 with the spring plate 31 resting along the back edge 15 of the blade as best seen in FIG. 3 of the drawings in dotted lines.
- the improved dual handle fighting knife 10 of the invention provides for a unique multiple handle retainment positionings wherein the spring plates 31 and 32 engagement configuration with the angular orientation of the shank portions 18 A and 18 B corresponding registration surface pairs 23 and 27 when in open position and 21 and 25 when in closed position and 22 and 23 when in transition position.
- the handle pairs 28 and 29 and blade 13 will always be in retained resistant relation to one another that is novel only to a dual handle folding knife 10 of the invention with the above described critical improvements and structural configurations as defined.
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Knives (AREA)
Abstract
Description
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/806,515 USRE43908E1 (en) | 2007-06-12 | 2010-11-01 | Dual handle safety folding knife |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/811,661 US7676930B1 (en) | 2007-06-12 | 2007-06-12 | Dual handle safety folding knife |
US12/806,515 USRE43908E1 (en) | 2007-06-12 | 2010-11-01 | Dual handle safety folding knife |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/811,661 Reissue US7676930B1 (en) | 2007-06-12 | 2007-06-12 | Dual handle safety folding knife |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE43908E1 true USRE43908E1 (en) | 2013-01-08 |
Family
ID=41819371
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/811,661 Ceased US7676930B1 (en) | 2007-06-12 | 2007-06-12 | Dual handle safety folding knife |
US12/806,515 Expired - Fee Related USRE43908E1 (en) | 2007-06-12 | 2010-11-01 | Dual handle safety folding knife |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/811,661 Ceased US7676930B1 (en) | 2007-06-12 | 2007-06-12 | Dual handle safety folding knife |
Country Status (1)
Country | Link |
---|---|
US (2) | US7676930B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9908245B1 (en) | 2016-11-03 | 2018-03-06 | Sport Manufacturing Group Inc. | Locking mechanism for a folding instrument |
US11298836B2 (en) | 2018-05-11 | 2022-04-12 | Fiskars Brands, Inc. | Folding machete |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0612972D0 (en) * | 2006-06-30 | 2006-08-09 | Cooper Robert G | Chisels |
US20080250655A1 (en) * | 2007-04-12 | 2008-10-16 | David Cook | Knife, knife blade, knife rack and two U-shaped handle forms each attached at one end to the blade |
US8973273B2 (en) * | 2012-01-13 | 2015-03-10 | Stanley Black & Decker, Inc. | Foldable chisel |
US10737400B2 (en) | 2016-08-29 | 2020-08-11 | Gb Ii Corporation | Retractable knife for rapid manual deployment while fully grasped |
USD825310S1 (en) * | 2017-03-10 | 2018-08-14 | Huan Liu | Butterfly Knife |
USD854393S1 (en) * | 2017-08-21 | 2019-07-23 | Great Neck Saw Manufacturers, Inc. | Safety scraper |
US10226678B1 (en) * | 2017-12-31 | 2019-03-12 | Yulu International Limited | Action skill toy |
TWI823979B (en) | 2018-08-07 | 2023-12-01 | 美商Gbⅱ公司 亦以哥倫比亞河流刀具及工具公司名稱營業 | Folding knife with locking linkage assembly |
JP7481021B2 (en) * | 2018-12-13 | 2024-05-10 | ベンチメイド ナイフ カンパニー インコーポレイテッド | Latchless locking mechanism for butterfly knives |
USD905529S1 (en) | 2019-07-31 | 2020-12-22 | Gb Ii Corporation | Folding knife with linkage assembly |
USD925325S1 (en) | 2019-11-20 | 2021-07-20 | Gb Ii Corporation | Folding knife with linkage assembly |
USD920763S1 (en) * | 2019-11-26 | 2021-06-01 | Heed Industries Inc. | Knife |
USD945244S1 (en) * | 2020-08-24 | 2022-03-08 | Benchmade Knife Co., Inc. | Handle extension for a knife |
US11472045B2 (en) | 2020-10-30 | 2022-10-18 | Shaoching Sung | Knife |
US20230241789A1 (en) * | 2022-02-01 | 2023-08-03 | Justin Byrd | Bow Drill Knife With Bearing |
USD1018248S1 (en) * | 2022-07-06 | 2024-03-19 | Benchmade Knife Co., Inc. | Knife handle extension |
USD1020427S1 (en) * | 2022-07-06 | 2024-04-02 | Benchmade Knife Co., Inc. | Knife |
USD974143S1 (en) * | 2022-10-24 | 2023-01-03 | William Everett Hirsch | Butterfly knife |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US229706A (en) * | 1880-07-06 | Edmund jansen | ||
US1665955A (en) * | 1928-04-10 | Knife structure | ||
US2263415A (en) * | 1940-12-18 | 1941-11-18 | Berg | Pocket tool |
US2671668A (en) * | 1949-05-11 | 1954-03-09 | Autopoint Co | Letter opener |
US2695450A (en) * | 1950-03-13 | 1954-11-30 | Western States Cutlery And Mfg | Combination cutlery tool |
US2714249A (en) * | 1953-07-13 | 1955-08-02 | Dixon W Clark | Folding knife |
US4047298A (en) | 1976-07-01 | 1977-09-13 | Philippar Donald T | Combination sheath and rigid handle for knife blades and the like |
US4271592A (en) * | 1979-02-05 | 1981-06-09 | Hoeptner Hans Gerd | Hand tool with a blade adapted to be folded into the handle |
US4330937A (en) * | 1980-07-25 | 1982-05-25 | Cope James R | Fish filletting knife |
US4364174A (en) * | 1981-04-27 | 1982-12-21 | Lester De Asis | Apparatus and improved method of manufacturing handles for butterfly defense knife |
US4547965A (en) * | 1982-04-16 | 1985-10-22 | Moore Donald M | Synchronized folding knife |
US4648145A (en) * | 1983-03-28 | 1987-03-10 | Miceli Philip V | Folding pocket tool and knife |
US4672743A (en) * | 1986-09-15 | 1987-06-16 | Grahm Robert D | Folding hand knife |
US4722140A (en) * | 1986-01-22 | 1988-02-02 | Miceli Philip V | Knife system |
US6195898B1 (en) | 1998-12-04 | 2001-03-06 | Adam M. Lemisch | Magnetically latching butterfly knife |
US6848183B2 (en) | 2002-08-12 | 2005-02-01 | Adam M. Lemisch | Thumb lock for a butterfly knife |
-
2007
- 2007-06-12 US US11/811,661 patent/US7676930B1/en not_active Ceased
-
2010
- 2010-11-01 US US12/806,515 patent/USRE43908E1/en not_active Expired - Fee Related
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US229706A (en) * | 1880-07-06 | Edmund jansen | ||
US1665955A (en) * | 1928-04-10 | Knife structure | ||
US2263415A (en) * | 1940-12-18 | 1941-11-18 | Berg | Pocket tool |
US2671668A (en) * | 1949-05-11 | 1954-03-09 | Autopoint Co | Letter opener |
US2695450A (en) * | 1950-03-13 | 1954-11-30 | Western States Cutlery And Mfg | Combination cutlery tool |
US2714249A (en) * | 1953-07-13 | 1955-08-02 | Dixon W Clark | Folding knife |
US4047298A (en) | 1976-07-01 | 1977-09-13 | Philippar Donald T | Combination sheath and rigid handle for knife blades and the like |
US4271592A (en) * | 1979-02-05 | 1981-06-09 | Hoeptner Hans Gerd | Hand tool with a blade adapted to be folded into the handle |
US4330937A (en) * | 1980-07-25 | 1982-05-25 | Cope James R | Fish filletting knife |
US4364174A (en) * | 1981-04-27 | 1982-12-21 | Lester De Asis | Apparatus and improved method of manufacturing handles for butterfly defense knife |
US4547965A (en) * | 1982-04-16 | 1985-10-22 | Moore Donald M | Synchronized folding knife |
US4648145A (en) * | 1983-03-28 | 1987-03-10 | Miceli Philip V | Folding pocket tool and knife |
US4722140A (en) * | 1986-01-22 | 1988-02-02 | Miceli Philip V | Knife system |
US4672743A (en) * | 1986-09-15 | 1987-06-16 | Grahm Robert D | Folding hand knife |
US6195898B1 (en) | 1998-12-04 | 2001-03-06 | Adam M. Lemisch | Magnetically latching butterfly knife |
US6848183B2 (en) | 2002-08-12 | 2005-02-01 | Adam M. Lemisch | Thumb lock for a butterfly knife |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9908245B1 (en) | 2016-11-03 | 2018-03-06 | Sport Manufacturing Group Inc. | Locking mechanism for a folding instrument |
US11298836B2 (en) | 2018-05-11 | 2022-04-12 | Fiskars Brands, Inc. | Folding machete |
US11697214B2 (en) | 2018-05-11 | 2023-07-11 | Fiskars Brand, Inc. | Folding machete |
Also Published As
Publication number | Publication date |
---|---|
US7676930B1 (en) | 2010-03-16 |
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Year of fee payment: 4 |
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AS | Assignment |
Owner name: GOOD SPORTSMAN MARKETING, L.L.C., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COLD STEEL, INC.;REEL/FRAME:054578/0070 Effective date: 20201201 |
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AS | Assignment |
Owner name: NXT CAPITAL, LLC, AS AGENT, ILLINOIS Free format text: SECURITY INTEREST;ASSIGNOR:GOOD SPORTSMAN MARKETING, L.L.C.;REEL/FRAME:054937/0360 Effective date: 20210115 |
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