Патент USA US2411099код для вставки
Nov. 12, 1946. 2,411,099 T. A. LONG Y CAN OPENER Filed Sept.> 4, 1944 IN1/Emol; 837750271615’.Ä „Cory W @www Patented Nov. 12, 1946 2,411,099 ¿ A*UNITED sTATEs PATENT oFFlcE 2,411,099 CAN OPENER Thomas A. Long, Hammond, Ind. Application September 4, 1944, Serial No. 552,585 7 Claims. . (Cl. 30----15) 2 1 A considerable effort has been extended here tofore in making can openers more reliable and satisfactory. The most satisfactory ones have been those which included a crank carried by a bracket extending out from a wall or other mounting surface. In addition to the crank, such can openers included a piercing lever which can opener is mounted on a hinged door, the plane of rotation of the handle coincides nearly enough with the pivotal axis of the hinge of the door so that turning of the handle produces very little torque tending to swing the door. Hence the door may be kept steady either by a very little force applied with the other hand, or by pressing it to the fully opened position so moved the cutting blade to produce the initial cutting of the can. It has been recognized that that a slight axial pressure on the handle of the extending bracket was sometimes objection 10 the crank holds the door pressed against the able and various expedients have been worked adjacent wall or other stop. The compactness of out for minimizing this objection, as for exam the opener also keeps it from taking up any ob ple, by having the bracket swing into parallelism jectionable amount of space within the cabinet with the wall when not in use. when the door is closed. » One object of the present invention is to pro 15 Additional objects and advantages will be ap vide a satisfactory can opener which operates parent from the following description and from entirely by movement of the crank. This move the drawing in which ment operates the cutter blade to cause the ini Fig. 1 is a front elevational view of the form of tial piercing of the can as well as rotating the the invention chosen for illustration; can against the cutter blade. This is accom 20 y Fig. 2 is a vertical, sectional view taken ap plished according to the preferred form of the proximately on the line 2-2 of Fig. 1; " present invention by arranging a pin on the Fig. 3 is a view corresponding to Fig. 1 but crank which is so disposed as to engage a lever showing the position of the parts after the crank operating the cutter blade. The initial move has been'turned slightly more than one revolu ment of the crank actuates the cutter blade which 25 is then held out of engagement with the pin by Fig. 4 isa fragmentary, side elevational view_of the pressure of the rotating can thereon as the a modification of the invention. crank continues to be rotated to turn the can. . Although the law requires a full and exact de Reverse rotation of the crank withdraws the cut- . scription of at least one form of the invention, ter blade from the can. 30 such as that which follows, it is, of course, the tion; Another object of the invention is to complete ly eliminate the objectionable extending bracket. p 1 purpose of a patent to cover each new inven tive concept therein no matter how it may be disguised by variations in form or additions of This is accomplished by the extremely simple ex pedient of putting the crank and the cutter on further improvements; and the appended claims the same side of the supporting plate and locat 35 are intended to accomplish this purpose by par ing them suñiciently far apart so that the can ticularly pointing out the parts, improvements, does not interfere with the rotation of the crank. or combinations in which the inventive concepts Of course the knurled wheel driving the can is are found. Y driven by a train of gears or the like. This In the illustratedV form of the invention, the might seem to be introducing complications 40 can opener includes a knurled drive wheel I0, which would be too expensive, but gears for this cutter blade II and a crank I2 all of which are purpose can be simple stampings and hence the carried by a base plate I3 having suitable per cost is not prohibitive. Furthermore, the gear forations I4 for receiving mounting screws. The ing can give a mechanical advantage to the crank crank I 2 drives a pinion I6 rigid therewith which which permits using a fairly short crank and still 45 in turn drives idler pinions I'I, the last of which having it turn easily enough-to be operated from drives pinion I8 which in turn drives knurled any position. ` ‘ wheel I 0 which is rigid therewith. The crank I2 Another object of the invention is toprovide ' bears a pin 2| which engages the upper end of a can opener which is suitable for mounting on lever 22, the lower end of which forms the cut a hinged door, such as the door of the cabinet 50 ting `blade II .1 Y in which the cans are kept. According to the The operation of the can opener is as follows: present invention, this is` accomplished largely 'I‘he starting position is shown in Fig. 1. A can by the feature last mentioned and by keeping the 23 is slipped under the cutter blade I I and rested entire assembly quite close to the surface on with its rim on knurled roller Ill. The operator which it is mounted. The result is that when a 55 then grasps the handle 24 of crank I2 and rotates ` 2,411,099 3 4 one and the crank I2 gives a mechanical ad vantage of nearly four to one. These mechanical advantages are multiplied so that not much more the crank. Near the end of the first revolution, the pin 2| strikes the lever 22 near its upper end and urges it in a counterlockwise direction to than one-twelfth the force required at the point of piercing need be applied to the handle 24, ignor ing friction. press the cutter blade I I down through the cap of the can to the position shown in Fig. 3. The pin 2l then slips past the lever 22, the movement of which is limited by a stop pin 2S. The rotation of the knurled wheel I0 turns the can forcing it I claim: l. A can opener including a lever of the first classr having arms of unequal length;` a cutter blade positioned at the free end of the shorter to rotate against cutting blade Il, thus cutting the top of the can around theperiphery thereof. arm',` a drive Wheel for turning the can against the cutter blade, a crank for turning the drive can cover has been slit the desired distancem* wheel, and means responsive to the turning of The pressure of the can against cutting blade I I holds the lever 22 against the pin '25. When the the reverse direction. The initial turning of the the crank for engaging the longer arm tol swing the same, thereby causing the cutterV blade to crank in the reverse direction rotates the can pierce'the can. around its periphery, the crank 22 is turne`d_,_ir,_1_V4 y against the back and side of the cutter blade I I to urge it in the clockwise direction and move it at least far enough so. that the pin> 2l moving 2. A can opener including a base plate, a crank pivotably carried thereby on one side thereof, a cutter blade carried on the same .side of the base plate, and a drive wheel rotatably carried by in _counterclockwise directionwíll engage the left side of lever 22 andpress the lever ina clock wise direction to move the parts back to the the base plate and on theY same side thereof, adapted to turn a can against the cutter blade and driven by said crank. 1 until the crank I2 is again actuated and hence surface on which the base plate is mounted. the` _can opener is ready to receive another can. It is thus seen that manipulation of the single pivotably carried thereby on one side thereof, a slightly in the reverse direction applyingVa-force . 3. A can opener including a base plate, a starting position shown- in Fig. l. Further clock wise movement of the lever 22 maybe prevented 25 crank pivotably carried thereby on one side thereof, a cutter blade carried on the same side by a stop 2l. Optionally thenstop 2l could be of the base plate, and adrive wheel rotatably resiliently yieldable so that pressure o_n the handle carríedby the base plate and on the same side 24 would raise the cutter-blade Il a little higher thereor, adapted to turn a can against the cutter than shown in Fig. lV so as to more completely blade and driven by said crank, said base plate release the can. „ t , being shaped to position the crank close to the The parts will Ystay in the position shown` in Fig. 4. A cantopener including a base plate, a crank cutter blade carried on the same side of the base lever` _or crank l2 performs the Whole iob~ Fur thermore, it. will. be observedthei; tbe plane of rotation of the crank I2 is s_o,k close >tothe mount plate,l and Va drive wheel rotatably carried bythe base plate and on the same side thereof adapted ine. Suríaoe that verylittle bereue will. be exerted to,v turn a> can against the cutter blade> and driven by any position _in_- ytliissurface. This makes it practioeble to usee- bineeddoer es. Support .mem ber and ¿also completely` _eliminates j any such trouble es rúllîrleobt of screws.. or bendingV of parte, Wbìoh sometimeerreviorslv resulted from the. lerereee supplied .by the bracket extending outwardly from the wall in past can openers.V _* „It is believed the# e111 0f, tbedeieils will be _Suf ficientlyA evident frontiK the drawing. l It may be noted, however,` that .the various! pinionsvor gears may befsta‘mped from Vsheetmetal sof that their brseíol Crank through geara 5; A can opener including a base plate, a crank 40 pivotably carried. thereby on one side thereof, a gutter blade carried ,on the same side of thebase plate, and a drive wheelV rotatably carried by the base plete and on,V the same -side thereof, adapted 45 to` turna can against `thecutter blade andl driven by Said crank;> saidcrank being pivotal about an eXLS vabove and. subst:antiallyy further from the drirefwbeeluthen the length of the. crank. 6:, A earl: opener inoludìnga base plate', a crank cost isextrernely low. `Also they are simple spur 50 pivotably carried thereby. on. one side thereof, a ouiterfblede eerried on the Same sideorthebase ge frs yof'uniform thickness sod that Vif it were plat fand a drive- wheel rotatably carried> by the desiredto cut them for greater accuracy, they could be gang-cut. The crankV I2 may be made baseplate, andl on the same side thereof, adapt edz te. turn` ax; can- against` the cutter bladeY and studl 3i Awhich may ` be rigid with veither the 55 driven Aby-,saïid< crank, said, crank being pivotal about an- azris above and> substantiallyA further` crank or the- pinion. Iand threaded into the other from the drive wheel` than thev length of the washers'32 forming the necessary spacers, and rigid with'the'. pinion Iöby means of a> threaded the washer 33 also forming a bearing member for crankÀ and -being- connected to theÁ driveA wheel bearing engagement with the base plate I3. The assembly> of pinion I8 and knurled wheel Ill` is similar except that the larger washer 32 is not required andthe threads on stud 34are left-hand through’speed reducing means to reduce the 60 torque required> to turnl the crank. ' 7, A_canî opener including a» cutter blade car ried by a» pivoted- lever of theñrst class, a drive Wheel rotatable inv one direction’for» turning the edwhile those on stud. 3l are right-handed. As a canî againstthefcutter‘blade, a crankkfor turning matter of fact, studs 3I~ and 34 can be threaded to both members instead of having a rigid engage 65. thedrívewheelin said direction, a projection on inentwith one if preferred, ' HIffa cutting wheel 4 Ifis preferred to-a stationary cutting blade, it may be mounted at the bottom of( lever 22, as seen in Fig. 4, ' ' said- crank`A~ adapted„ .when the crank is.- turnedv to rotate the drive Wheel in said direction,_to en gvagefsaidîlever and'pivot> it in the opposite direc tipn, td pierce the can,Y with - the` cutter-- blade,` the The hardest part of can opening'heretoïf‘ore has 70 mpvement‘of; the` canA aguainstvthe cuttery .blade u‘suallybeen` the initial piercing of thev can.> -‘This is'quite easy in the 'present invention. The lever 2-2gives a mechanical advantage of nearly three to then ì _urgingy the4 lever. further in lthe, same f direc tion,._,and.the projection thenclearing`v^ the lever.,_ „ Y . „ » THOMAS A. LONG.