Cutlery – Cutting tools – With blade moving means
Reexamination Certificate
2000-06-10
2002-08-06
Payer, Hwei-Slu (Department: 3724)
Cutlery
Cutting tools
With blade moving means
C030S272100, C030S286000
Reexamination Certificate
active
06427339
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an electrical metal cutting device and more particularly pertains to allowing metal objects to be cut in difficult to reach areas.
The use of tools and accessories is known in the prior art. More specifically, tools and accessories heretofore devised and utilized for the purpose of cutting objects are known to consist basically of familiar, expected and obvious structural configurations, notwithstanding the myriad of designs encompassed by the crowded prior art which have been developed for the fulfillment of countless objectives and requirements.
By way of example, U.S. Pat. No. 4,105,080 to Gunning discloses an air hammer capable of reciprocation when connected to a source of pressurized air. U.S. Pat. No. 4,300,287 to Tibbs discloses a tool attachable to an air hammer for removing the skin of an automobile. U.S. Pat. No. 4,164,813 to Dittert discloses an electrically powered knife.
While these devices fulfill their respective, particular objective and requirements, the aforementioned patents do not describe an electrical metal cutting device for allowing metal objects to be cut in difficult to reach areas.
In this respect, the electrical metal cutting device according to the present invention substantially departs from the conventional concepts and designs of the prior art, and in doing so provides an apparatus primarily developed for the purpose of allowing metal objects to be cut in difficult to reach areas.
Therefore, it can be appreciated that there exists a continuing need for a new and improved electrical metal cutting device which can be used for allowing metal objects to be cut in difficult to reach areas. In this regard, the present invention substantially fulfills this need.
SUMMARY OF THE INVENTION
In the view of the foregoing disadvantages inherent in the known types of tools and accessories now present in the prior art, the present invention provides an improved electrical metal cutting device. As such, the general purpose of the present invention, which will be described subsequently in greater detail, is to provide a new and improved electrical metal cutting device which has all the advantages of the prior art and none of the disadvantages.
To attain this, the present invention essentially comprises a housing having a generally L-shaped configuration.
The housing has a hollow interior. The housing has a horizontally disposed upper portion and a vertically disposed lower portion. The upper portion has an open outer end. A motor is disposed within the upper portion of the housing. The motor has a corresponding activation trigger disposed within the lower portion of the housing. The activation trigger has an outer portion disposed outwardly of the lower portion of the housing. The motor is couplable with an outside power source. A power cylindrical bore is disposed within the upper portion of the housing inwardly of the open outer end thereof. The power cylindrical bore has a shaft extending inwardly therefrom. The shaft has a free end coupling with the motor. The power cylindrical bore has an open outer end. A power piston is slidably positioned within the open outer end of the power cylindrical bore. The power piston has an outer end extending outwardly of the open outer end of the upper portion of the housing. The power piston has an opening in its outer end. A cutting blade is secured within the opening in the outer end of the power piston. A compression spring is secured to the outer end of the power piston. The compression spring has a ring guard receiving the cutting blade therethrough. The compression spring has a hooked portion extending downwardly therefrom.
There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto.
In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting.
As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention.
It is therefore an object of the present invention to provide a new and improved electrical metal cutting device which has all the advantages of the prior art tools and accessories and none of the disadvantages.
It is another object of the present invention to provide a new and improved electrical metal cutting device which may be easily and efficiently manufactured and marketed.
It is a further object of the present invention to provide a new and improved electrical metal cutting device which is of durable and reliable construction.
An even further object of the present invention is to provide a new and improved electrical metal cutting device which is susceptible of a low cost of manufacture with regard to both materials and labor, and which accordingly is then susceptible of low prices of sale to the consuming public, thereby making such an electrical metal cutting device economically available to the buying public.
Even still another object of the present invention is to provide a new and improved electrical metal cutting device for allowing metal objects to be cut in difficult to reach areas.
Lastly, it is an object of the present invention to provide a new and improved electrical metal cutting device including a housing having a generally L-shaped configuration. The housing has a hollow interior. The housing has a horizontally disposed upper portion and a vertically disposed lower portion. The upper portion has an open outer end. A motor is disposed within the upper portion of the housing. The motor is couplable with an outside power source. A power cylindrical bore is disposed within the upper portion of the housing inwardly of the open outer end thereof. The power cylindrical bore has a shaft extending inwardly therefrom. The shaft has a free end coupling with the motor. The power cylindrical bore has an open outer end. A power piston is slidably positioned within the open outer end of the power cylindrical bore. The power piston has an outer end extending outwardly of the open outer end of the upper portion of the housing. The power piston has an opening in its outer end. A cutting blade is secured within the opening in the outer end of the power piston.
These together with other objects of the invention, along with the various features of novelty which characterize the invention, are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific objects attained by its uses, reference should be had to the accompanying drawings and descriptive matter in which there is illustrated preferred embodiments of the invention.
REFERENCES:
patent: 1896580 (1933-02-01), Gilmore
patent: 2367945 (1945-01-01), Jorgensen
patent: 3642002 (1972-02-01), Otterstrom
patent: 3832772 (1974-09-01), Sumida
patent: 4105080 (1978-08-01), Gunning
patent: 4164813 (1979-08-01), Dittert
patent: 4300287 (1981-11-01), Tibbs
patent: 4
Goldstein & Lavas P.C.
Payer Hwei-Slu
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