US 1635649 A
Description (OCR text may contain errors)
1,635,649 July 1927' c. w. TILLMANNS CAN OPENER Filed July 28. 1924 'INVENTOR. Gar! 11/. 771101111148 Patented July 12,1927.
UNITED STATES PATENT OFFICE.
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Application filed July 28, 1924. Serial No. 728,689.
This invention relates to can-ppeners and for the purpose ofillustration is shown as applied to a can-opener pivoted to. a combination tool or kni e. O
I ()nc object of the invention is to provide a can-opener comprising a back and a blade of diiferent materials, whereby the mostdesirable material for each part may be used.
A furthenobject of the invention 15 130 provide a can-opener adapted for effective use on either cans with rims, or rimless cans.
A further object of the invention is to providea can-opener having separate back and blade, each comprising a tang, and
means associated with said tangs for pivoting said can-opener to a handle, and for securing said blade and back together.
With these and other objects in.view my invention consists in the novel combinations and arrangements of parts which are illustrated in the drawings and will be herein after described. 1 1
In the drawings,
Fig. 1 is a view of a comb nation tool embodying a can-opener comprising my invention.
Fig. 2 shows longitudinal and end eleva t-ions and a plan of the can-opener back. Fig. 3 shows a plan and an elevation of so the can-opener bla e.
Fig. 4. shows a plan and an elevation of the complete can-opener, removed from the handle.
Numeral 5 designates the can-opener blade, which comprises a tang 6, perforated at points 7 8, and 81. The perforation 7 is adapted to receive the pivot pin 9 which joins the can-opener to the knife handle. The perforations 8 and 81 are adapted to receive rivets which join the blade to the can-opener back. The back 10 comprises a tang 11 of the same size and shape as the tang 6, and comprises perforations 11', 12, and 121 located to align respectively with 4 perforations 7, 8 and 81 when the tangs 6 and 10 are superposed. The back 10 also comprises a lateral extension, 13 adapted to engage the rims of cans provided with rims, and a vertical projection provided with a roughened or serrated face 14, adapted to engage the surface of rimless cans. The face 14 is located somewhat below the bottom face of the lateral extension 13, thereby insuring the contact of the serrated friction face 14 with the surface of a rimless can.
The use of separate elements for the blade and back ermits the selection of different materials or these parts. This is of great importance. The function of the blade is to out, while the function of the back is to supply a supporting lever for the cuttin edge, hence it is obvious that the materia most suitable for a back will be altogether unsuitable for a blade. The forming of these two parts separately permits the selection for each part of a material especially ada ted for the function to be performed thereby The blade may be made of a hard high carbon steel which will permanently retain a sharp cutting edge, while the back may be made of a softer and tougher spring steel. An e rtraordinarily efiicient can-opener is thus insured. The method of joining the blade and back, comprising supporting them from the same pivot, and oining them with rivets at two other points insures a rigid and permanent connection between them.
The invention is not to be considered as limited to the precise form herein described and illustrated in the drawings, but is to be construed as covering all equivalent devices falling within the scope of the appended claims.
1. A can-opener comprising a blade and a back formed as separate elements said blade and back respectively comprising tangs adapted to be superposed, a pivot pin adapted to pass thru aligned openings in said superposed tangs, and means other than said pivot pin, associated with said tangs for securing said blade and back against relative displacement.
2. A can-opener comprising a blade and a back formed as separate elements and comprising respectively tangs of similar size and shape, means for securing said tangs together at a plurality of points, said securing means comprising in part a pivot common to blade and back.
3. In a combination tool, a can-opener comprising a handle and separable blade and back elements, said back element being provided with means for engaging the rim of a can provided with a rim, and other Iiieans ments, said blade and back respectively comfor engaging the fiat surface of a rimless prising tangs of similar size and shape 10 can means for securing said blade and back adapted to superposed, pivot means, and elements against relative displacement com-- means securing said blade and back against 5 prising in part a device for pivotally securrelative displacement associated with said and can-opener to said handle. tangs.
A combination tool comprisin a cane opener having separable blade and ack ele- CARL W. TILLMANNS.