CA1124080A - Electric knife sharpener - Google Patents
Electric knife sharpenerInfo
- Publication number
- CA1124080A CA1124080A CA352,896A CA352896A CA1124080A CA 1124080 A CA1124080 A CA 1124080A CA 352896 A CA352896 A CA 352896A CA 1124080 A CA1124080 A CA 1124080A
- Authority
- CA
- Canada
- Prior art keywords
- grinding wheel
- knife
- armature
- rotor
- housing
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An electric knife sharpener characterized by an electric motor having a stator winding producing a magnetic axial bias on tha armature and on a grinding wheel axially displaceable bodily with the armature and by a pair of slots adapted to engage a knife against them and angularly intersecting the grinding wheel whereby a properly inserted blade axially displaces the grinding wheel and the motor armature to achieve a substantially constant magnetic axial bias of the grinding wheel against the blade of a knife upon magnetic action of the motor winding on the motor armature.
An electric knife sharpener characterized by an electric motor having a stator winding producing a magnetic axial bias on tha armature and on a grinding wheel axially displaceable bodily with the armature and by a pair of slots adapted to engage a knife against them and angularly intersecting the grinding wheel whereby a properly inserted blade axially displaces the grinding wheel and the motor armature to achieve a substantially constant magnetic axial bias of the grinding wheel against the blade of a knife upon magnetic action of the motor winding on the motor armature.
Description
8~
FIELD OF TH INUENTI~N
This inuention rslates tD a knife sharpener and more particularly, tu a knife ~harpener of the typa having a grinding wheel driven by an electric motor, as cnmmonly used in homes.
~ACKGROUND OF THE INVENTION
; In the electric knife sharpener~ of the type that have been prOpC18ed 80 far, the slot or alots ~or the knife, and the grinding ............. ........ wheel are relatively arranged with the r~ult that the quality of tha sharpening very much dependQ on the skill o~ the u~erO In practics, this leads to uneven sharpening, fastsr grinding out of th~ knive3 to correct unevenly grounded ~pots or portion~ of the blade, and to a skill requirement that i8 beyond the pos~ibilities of many people.
More particularly, the electric knife sharpenere that havs b~en '~ prOp'08ed 90 far include at lea~t one of the following dieadvantage3:
their 810t9 are arranged such that tha kni~e i8 not positively guided --all the way at the ~ame angla relative to ths grinding ~acs; the pr~s~ure of the blade against th~ grindlng wheal i9 not positivsly contrslled and i8 entirely dependent on th~ sklll of the u~er; the ; s3me slot ia u~d for tha l~t ~ide and the right eide o~ the blads ~ 2U and th~re i3 thu~ ~ probl~m to hold tho blede at th~ ~ame angle - ~or both 0ide~; thu grlnding wheel rotat~ in ths fr~nt to roar diréction againRt the blad~ end thi~ prcduce~ a rough cùtting sdge ~: with graininga on it.
:
,,'~ ~!~
A general ob~ect of the pre~0nt lnv~n~lon i9 to provide an ~lectric knife 3harpener o~ the abnv~ type that ~8 conctructed and arranged to ~ ~ubstantially evold tha 3bove montioned disedvQntageeO
; A more partlcular 90nsr~1 ob~ect of tha presont invention ie toprovld0 an elactric kni~e ~h~rpener of th~ abov~ type that i9 adapted -. 30 to providu even sharpening of kniv~D subat~ntially irrespactivs of the skill o~ tha u3~r.
A mor~ aper-i~ic ob~act of the pre~ent invention ia to provide , .~ .
- I~
FIELD OF TH INUENTI~N
This inuention rslates tD a knife sharpener and more particularly, tu a knife ~harpener of the typa having a grinding wheel driven by an electric motor, as cnmmonly used in homes.
~ACKGROUND OF THE INVENTION
; In the electric knife sharpener~ of the type that have been prOpC18ed 80 far, the slot or alots ~or the knife, and the grinding ............. ........ wheel are relatively arranged with the r~ult that the quality of tha sharpening very much dependQ on the skill o~ the u~erO In practics, this leads to uneven sharpening, fastsr grinding out of th~ knive3 to correct unevenly grounded ~pots or portion~ of the blade, and to a skill requirement that i8 beyond the pos~ibilities of many people.
More particularly, the electric knife sharpenere that havs b~en '~ prOp'08ed 90 far include at lea~t one of the following dieadvantage3:
their 810t9 are arranged such that tha kni~e i8 not positively guided --all the way at the ~ame angla relative to ths grinding ~acs; the pr~s~ure of the blade against th~ grindlng wheal i9 not positivsly contrslled and i8 entirely dependent on th~ sklll of the u~er; the ; s3me slot ia u~d for tha l~t ~ide and the right eide o~ the blads ~ 2U and th~re i3 thu~ ~ probl~m to hold tho blede at th~ ~ame angle - ~or both 0ide~; thu grlnding wheel rotat~ in ths fr~nt to roar diréction againRt the blad~ end thi~ prcduce~ a rough cùtting sdge ~: with graininga on it.
:
,,'~ ~!~
A general ob~ect of the pre~0nt lnv~n~lon i9 to provide an ~lectric knife 3harpener o~ the abnv~ type that ~8 conctructed and arranged to ~ ~ubstantially evold tha 3bove montioned disedvQntageeO
; A more partlcular 90nsr~1 ob~ect of tha presont invention ie toprovld0 an elactric kni~e ~h~rpener of th~ abov~ type that i9 adapted -. 30 to providu even sharpening of kniv~D subat~ntially irrespactivs of the skill o~ tha u3~r.
A mor~ aper-i~ic ob~act of the pre~ent invention ia to provide , .~ .
- I~
- 2 -, .. , . , , .. .. , , . . . . , ., ,_, . . _.-- _.. _, . , , , ... , __ _ ... _, . ~ _, _, _ _ , _ an electric kniYe eh&rpener of tha aho~e type th~t produces svan biasing o~ ~ kni~e and grinding wheel operativaly againat aach -oth0r .
Anothor ob~act of the ~rs~ent in~ention i9 to providR an el0ctric knife harpaner o~ the above type whHrein the knife is adapted to be poRitively held angularly and poeitionally relative to a grinding whHel for even grlnding all the way along the blada of tha kni~e.
A further object o~ th~ present 1nvention ia to pro~ide an eleotric knife sharpensr of the sbova type wherein ther~ i8 a slQt on e3ch side of th~ grinding wheel to seFarately and accurately grind both sides o~ a knife in thoae elots respectively.
A still ~urther ob~ec~ o~ tha pressnt invention i8 to provide sn electric knl~e eharpener of the above typ~ wherein ths motor and the alote are arrangsd to rotate the grinding wheel againAt the blade of a knife in the ~orward dir~ction o~ diapl~csm~nt c~ the kni~e and ther~by produce ~ minimum o~ grainings on the blade.
Still another ob~ct ot th~ pras3nt in~ention ie to prouide an electric knif0 sharpener o~ th~ abo~a type wherein the biae of the grinding wheel relatlvo to the blad~ ot a kni~e i8 achi~ved by magnetic axial bi~e ef the orinding wheal by the magnetic field of ths motor winding.
~
The above ~nd other ob3eota ~nd ~d~ant~ges o~ tha pr0ssnt ,...
lnvention w111 be b~tt~r unde~tood with ra~srenc~ to the ~ollowing ~ dat0ilad daecrlption o~ a pr0farred embodi~ent thersof which ie ;~ illuatr~ted by woy oP exa~ple in the acco~panying drawings, in whioh:
Figure a tep plan viaw of an eleGtric knife ~harpener ~,.,:;
according to the pr~ent lnv~ntion9 Figure 2 i8 ~ front el~vation vlew o~ the ~am0 ~lectric knife aharp0ner;
Figure 3 i~ a croa~ s~ctionAl view, ae ~een along lina 3-3 in v Figure l;
,, .
, j , ~
Anothor ob~act of the ~rs~ent in~ention i9 to providR an el0ctric knife harpaner o~ the above type whHrein the knife is adapted to be poRitively held angularly and poeitionally relative to a grinding whHel for even grlnding all the way along the blada of tha kni~e.
A further object o~ th~ present 1nvention ia to pro~ide an eleotric knife sharpensr of the sbova type wherein ther~ i8 a slQt on e3ch side of th~ grinding wheel to seFarately and accurately grind both sides o~ a knife in thoae elots respectively.
A still ~urther ob~ec~ o~ tha pressnt invention i8 to provide sn electric knl~e eharpener of the above typ~ wherein ths motor and the alote are arrangsd to rotate the grinding wheel againAt the blade of a knife in the ~orward dir~ction o~ diapl~csm~nt c~ the kni~e and ther~by produce ~ minimum o~ grainings on the blade.
Still another ob~ct ot th~ pras3nt in~ention ie to prouide an electric knif0 sharpener o~ th~ abo~a type wherein the biae of the grinding wheel relatlvo to the blad~ ot a kni~e i8 achi~ved by magnetic axial bi~e ef the orinding wheal by the magnetic field of ths motor winding.
~
The above ~nd other ob3eota ~nd ~d~ant~ges o~ tha pr0ssnt ,...
lnvention w111 be b~tt~r unde~tood with ra~srenc~ to the ~ollowing ~ dat0ilad daecrlption o~ a pr0farred embodi~ent thersof which ie ;~ illuatr~ted by woy oP exa~ple in the acco~panying drawings, in whioh:
Figure a tep plan viaw of an eleGtric knife ~harpener ~,.,:;
according to the pr~ent lnv~ntion9 Figure 2 i8 ~ front el~vation vlew o~ the ~am0 ~lectric knife aharp0ner;
Figure 3 i~ a croa~ s~ctionAl view, ae ~een along lina 3-3 in v Figure l;
,, .
, j , ~
- 3 -, , ~ igure 4 i~ a crpss-3ectional vi~w as aeen along lins 4-4 in Figur0 1;
Figurs 5 i9 a par~p~cti~s view of the 3ame electric knife ~hsrpanar with a knifa operativaly associated with it in sharpening position; and Figure 6 i~ a view of R grinding whaal fnrming part of the alactric knif~ sharpenar o~ the other figur0~ of drawings~
The illu~trated elsctric knif0 sharpener comprises a housing fermad of an upper portion 1 and a bottom or lower portion 2. An electric ewitoh i~ eecured to the upper po~tion 1 and outwardly proJscts thsra~rom to energize an electric moto~ driving a grinding whsel 4. The electric motor 5 iA ~ecured to the base portion 2 and projsct~ into the upp0r houaing portion 1.
The elsctric mutor 5 lncluds~ a stator and a rotor. The atetor compriss~ a fixed armature 6 made of laminations, as ~hown in Figura
Figurs 5 i9 a par~p~cti~s view of the 3ame electric knife ~hsrpanar with a knifa operativaly associated with it in sharpening position; and Figure 6 i~ a view of R grinding whaal fnrming part of the alactric knif~ sharpenar o~ the other figur0~ of drawings~
The illu~trated elsctric knif0 sharpener comprises a housing fermad of an upper portion 1 and a bottom or lower portion 2. An electric ewitoh i~ eecured to the upper po~tion 1 and outwardly proJscts thsra~rom to energize an electric moto~ driving a grinding whsel 4. The electric motor 5 iA ~ecured to the base portion 2 and projsct~ into the upp0r houaing portion 1.
The elsctric mutor 5 lncluds~ a stator and a rotor. The atetor compriss~ a fixed armature 6 made of laminations, as ~hown in Figura
4~ with a winding 7 coiled around a bottom partlon o~ the ~ix~d armatura. The rotor f.the motor compri~es an armaturs ~ rotative~y mounted ae i~ well known for magn~tic ~nergi~atiun by the winding 7 through ths laminated ermature 50 A pair o~ bearinga 9 rotativaly carry a ~haft 10 ~n which sre fixadly s~cur~d the arm~ture ~ snd thæ
grinding wh0~1 4 for bedily di~placement ther~with both in rotation and axially ralatlva to the ba0rings 9. A ventil~ting fan 11 i~ securad on th0 oppoaite end o~ th0 ~h~t 10 to vantilate th~ mctor upon lt~
rotation. The bearing~ 9 and the mounti~g Qf the ahaft lD i8 su~h that the latter i8 ~reely axi~lly displec~able. It is well known that the ~agnetic ~ield prnvided by the winding 7 produces 8 magnetic bi~a on tha armature B to driv~ tha latte~. Al~o, it i~ known but to a lesa sxt0nt that the ~ama ~gnstic ~l~ld producas an axial biaa against axi21 displacem~nt of th~ rotary armatur~ ~ 0ithsr wày from , 3D a næutral, intermadiat0 ~xi~l position.
The grinding wha01 4 define~ axially opposit~ flat facaa or sid~ 12 ~ach having a circumfarsntial outar ndg0 or lina 13 and a _ . _ . __. _ . _. , ,, .~ ... _, .. ..... . . .. . .. .
8~
.
circumferential outer portion adjoining the line 13. On eaoh ~ide of ~ the grinding wh~el 4, there i8 alsn providsd a circumferential Dutar portion 14 whi~h, as ~hown in Figur0 6, i~ transversely conv~x with a radius indicated by R to sharpen a hollow ground blada. Th0 grinding wheel 4 al~o includes a cylindrical surface 15. Washar~s 16 are mounted on the ~haft lO to ~oparate the rotary armature 8 from the bearings 9.
. The upper portion 1 of the houelng i8 provided with a palr of ~; ~lots 17 and lB ext~nding downwardly into the upp~r portion~ each to a pradetsrmined depth snd at a prsdet3rminad angle. The slot 17 and lB are arranged on the opposit0 eide3 o~ the grinding wheel with their plane conv0rging toward sach other and toward the grinding whe01 such that each o~ the~e~lote intersects ths corresponding side o~ the grinding wheel when tho latter stands ln the neutral position oP magnetic axial biae produced by the windlng 7 on tha rotor armature 8. Thi~ relationship between the slot~ 17 and 18 and the grinding wheel 4 i9 illustrated in Flgurss 2 and 4 wherein th~ ~ull line illu~tration o~ the grinding wheel r~presents ita neutral poeition . of magnetic axial bias~ ~he depth o~ the 810te 17 and 18 is such :~ 20 that the blade ~ ot a knife K iB engagad to the bottDm thqrao~, the ~ blade will overlap the abova mentioned ~l~t c1rcu~fer0ntial outar . . , portion only with ~ g~all o~erlap indlcatsd by the latter E in Flgure 3~ The l~tt~r F indicates the dapth o~ ths ground portion that can be made by the eircum~erential sur~ace~ 14 oP the grinding :~ whael 4.
It must be readily und0rstood that upon operatlve 3ngagement -; of the blada 9 o~ a kni~e K in the elot 17, the grinding whsel 4 ia sxially ~i~pl~ced a predetermined distance by tho blsd~ to the : po~ltion indicated by th0 da~hed line~ 4' in Figure 4~ There results the ~ame axial displacement of the armature ~ re~ulting in the magnetic ~iold acting ther00n So produce ~ counter-acting ,. . .
magn~tic axi~l bias ot the grinding wheel 4 against the right ~ide . . _ .... ~ ., _. _ __ _ .. _ .. .. . . .. . . .
of -'ha blada. Similarly, the engag0m~nt' of the blade o~ a kni~
to the bsttom o~ tha ~lot 18 prnducs~ a magnetic axial bias in the oppositfl direction upon di~placam0nt o~ the grinding wheel to the dashed lines po~ition 4'~. Thu~, a constant magn~tic axial blaa i9 produc0d against aither ~ide of the blade. The right ~ide and the left side of tha blade are sharpened into the left and the right slots regp8ctivaly. ThH 810t8 17 and lH are inclined at a predetermined angla A, a~ sho~n in Figure 4, for optimum sharpe'ning of ths cutting edoe o~ knif~ blades.
An intermediate alot 19 i~ ~ormed in tha top oP the hsusing portion 1 in o~erlying regi~try w~th the cylindrical sur~ace 15 o~
the grinding whael 4. The alot 19 is in an inclined plane relative to the plane o~ rot~tion ot the grinding wheel and hss oppoaite faces inclined at dif~0rant angles B and C~ ahown in Figure 4. The differently inolined opposite ~aceR are predetermined to engage the two bladas respsctively o~ ~oissors against them.
Aa ~hown in Figure 3,~the grinding whs01 4 ha~ ito uppsr portlon rotsting in a ~orward direction again3t the bl~de o~ the kni~ to produce a very smooth,~harpening froe o~ grainings,elong the edge o~ tha blade~ ~
' .
~ 6 -,,,,, . , , . . .. , ... ,, . _ .
, .
grinding wh0~1 4 for bedily di~placement ther~with both in rotation and axially ralatlva to the ba0rings 9. A ventil~ting fan 11 i~ securad on th0 oppoaite end o~ th0 ~h~t 10 to vantilate th~ mctor upon lt~
rotation. The bearing~ 9 and the mounti~g Qf the ahaft lD i8 su~h that the latter i8 ~reely axi~lly displec~able. It is well known that the ~agnetic ~ield prnvided by the winding 7 produces 8 magnetic bi~a on tha armature B to driv~ tha latte~. Al~o, it i~ known but to a lesa sxt0nt that the ~ama ~gnstic ~l~ld producas an axial biaa against axi21 displacem~nt of th~ rotary armatur~ ~ 0ithsr wày from , 3D a næutral, intermadiat0 ~xi~l position.
The grinding wha01 4 define~ axially opposit~ flat facaa or sid~ 12 ~ach having a circumfarsntial outar ndg0 or lina 13 and a _ . _ . __. _ . _. , ,, .~ ... _, .. ..... . . .. . .. .
8~
.
circumferential outer portion adjoining the line 13. On eaoh ~ide of ~ the grinding wh~el 4, there i8 alsn providsd a circumferential Dutar portion 14 whi~h, as ~hown in Figur0 6, i~ transversely conv~x with a radius indicated by R to sharpen a hollow ground blada. Th0 grinding wheel 4 al~o includes a cylindrical surface 15. Washar~s 16 are mounted on the ~haft lO to ~oparate the rotary armature 8 from the bearings 9.
. The upper portion 1 of the houelng i8 provided with a palr of ~; ~lots 17 and lB ext~nding downwardly into the upp~r portion~ each to a pradetsrmined depth snd at a prsdet3rminad angle. The slot 17 and lB are arranged on the opposit0 eide3 o~ the grinding wheel with their plane conv0rging toward sach other and toward the grinding whe01 such that each o~ the~e~lote intersects ths corresponding side o~ the grinding wheel when tho latter stands ln the neutral position oP magnetic axial biae produced by the windlng 7 on tha rotor armature 8. Thi~ relationship between the slot~ 17 and 18 and the grinding wheel 4 i9 illustrated in Flgurss 2 and 4 wherein th~ ~ull line illu~tration o~ the grinding wheel r~presents ita neutral poeition . of magnetic axial bias~ ~he depth o~ the 810te 17 and 18 is such :~ 20 that the blade ~ ot a knife K iB engagad to the bottDm thqrao~, the ~ blade will overlap the abova mentioned ~l~t c1rcu~fer0ntial outar . . , portion only with ~ g~all o~erlap indlcatsd by the latter E in Flgure 3~ The l~tt~r F indicates the dapth o~ ths ground portion that can be made by the eircum~erential sur~ace~ 14 oP the grinding :~ whael 4.
It must be readily und0rstood that upon operatlve 3ngagement -; of the blada 9 o~ a kni~e K in the elot 17, the grinding whsel 4 ia sxially ~i~pl~ced a predetermined distance by tho blsd~ to the : po~ltion indicated by th0 da~hed line~ 4' in Figure 4~ There results the ~ame axial displacement of the armature ~ re~ulting in the magnetic ~iold acting ther00n So produce ~ counter-acting ,. . .
magn~tic axi~l bias ot the grinding wheel 4 against the right ~ide . . _ .... ~ ., _. _ __ _ .. _ .. .. . . .. . . .
of -'ha blada. Similarly, the engag0m~nt' of the blade o~ a kni~
to the bsttom o~ tha ~lot 18 prnducs~ a magnetic axial bias in the oppositfl direction upon di~placam0nt o~ the grinding wheel to the dashed lines po~ition 4'~. Thu~, a constant magn~tic axial blaa i9 produc0d against aither ~ide of the blade. The right ~ide and the left side of tha blade are sharpened into the left and the right slots regp8ctivaly. ThH 810t8 17 and lH are inclined at a predetermined angla A, a~ sho~n in Figure 4, for optimum sharpe'ning of ths cutting edoe o~ knif~ blades.
An intermediate alot 19 i~ ~ormed in tha top oP the hsusing portion 1 in o~erlying regi~try w~th the cylindrical sur~ace 15 o~
the grinding whael 4. The alot 19 is in an inclined plane relative to the plane o~ rot~tion ot the grinding wheel and hss oppoaite faces inclined at dif~0rant angles B and C~ ahown in Figure 4. The differently inolined opposite ~aceR are predetermined to engage the two bladas respsctively o~ ~oissors against them.
Aa ~hown in Figure 3,~the grinding whs01 4 ha~ ito uppsr portlon rotsting in a ~orward direction again3t the bl~de o~ the kni~ to produce a very smooth,~harpening froe o~ grainings,elong the edge o~ tha blade~ ~
' .
~ 6 -,,,,, . , , . . .. , ... ,, . _ .
, .
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED, ARE DEFINED AS FOLLOWS:
1. An electric knife sharpener comprising a housing, an electric motor mounted in said housing and including a rotor and a stator, bearing means rotatively holding the rotor and arranged for axial displacement of the latter, said rotor having an armature rotatively carried by said bearing means and axially displaceable re-lative thereto, the stator having a winding producing a magnetic field operatively acting on the armature to drive the rotor and axially biasing the armature against axial displacement thereof from a magnetically neutral axial position relative to said bearing means, a grinding wheel connected to the rotor and axially displaceable bodily therewith against the magnetic axial bias produced on the rotor by the winding, and said housing having at least one aperture therein adjacent the grinding wheel and providing access to hold a knife in lateral contact with one side of the grinding wheel against said magnetic axial bias for operative sharpening of the knife.
2. An electric knife sharpener as defined in claim 1, wherein said one aperture constitutes one slot extending into the housing in a plane converging with the plane of rotation of the grinding wheel and intercepting the latter at a predetermined axial distance while the armature stands in said magnetically neutral axial position whereby upon engagement of a knife at the bottom of said one slot, the grinding wheel axially engages against the knife with a constant magnetic axial bias.
3. An electric knife sharpener as defined in claim 2, wherein said housing includes another slot extending therein, both of said slots extend in converging planes relative to each other and to the plane of rotation of the grinding wheel and on the axially opposite sides of the latter, each of said slots intersects the grinding wheel a predetermined axial distance while the armature stands in said magnetically neutral axial position, each of said slots defines a front end and a rear and corresponding to a front and a rear of the housing respectively, and said motor is constructed and arranged to rotate the grinding wheel in a forward direction adjacent said slots and against the blade of a knife.
4. An electric knife sharpener as defined in claim 3, wherein the grinding wheel has opposite sides defining flat faces at right angle to the rotation axis of the grinding wheel and a bevel annular surface adjoining said flat faces circumferentially outward thereof and said flat faces have each a radially outmost circumferential portion axially registering with the bottom of the corresponding slot whereby a knife in one of the slots is sharpened against and by the corresponding outmost circumferential portion.
5. An electric knife sharpener as defined in claim 4, wherein said housing includes a third slot extending therethrough in an inclined plane intermediate said one and said another slots end said grinding wheel includes a flat circumferential surface underlying said third slot and forming an angle relative thereto adapted to sharpen scissors into the third slot against the flat circumferential surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA352,896A CA1124080A (en) | 1980-05-28 | 1980-05-28 | Electric knife sharpener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA352,896A CA1124080A (en) | 1980-05-28 | 1980-05-28 | Electric knife sharpener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1124080A true CA1124080A (en) | 1982-05-25 |
Family
ID=4117048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA352,896A Expired CA1124080A (en) | 1980-05-28 | 1980-05-28 | Electric knife sharpener |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1124080A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7189142B2 (en) | 2005-07-29 | 2007-03-13 | Damasio Da Batista | Sharpening-trimming assembly |
-
1980
- 1980-05-28 CA CA352,896A patent/CA1124080A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7189142B2 (en) | 2005-07-29 | 2007-03-13 | Damasio Da Batista | Sharpening-trimming assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |