Cutlery – Perforating or indenting implements
Reexamination Certificate
1999-10-22
2001-02-20
Rachuba, M. (Department: 3724)
Cutlery
Perforating or indenting implements
C030S363000
Reexamination Certificate
active
06189220
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a punch, and more particularly to a punch having one or more punching members that may be replaced with each other.
2. Description of the Prior Art
Typical punches comprise a punch rod slidably received in a housing, a knob secured on top of the punch rod for forcing the punch rod downward to cut or to punch the sheet members. A spring is engaged with the punch rod for biasing the punch rod away from the sheet members before the punch rod is depressed against the sheet members. The punch rod has a predetermined shape which may be used to punch or to form a predetermine-shaped pattern on the sheet members. The patterns may not be changed.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional punches.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a punch including one or more punching members that may be replaced and changed with each other according to the user's need.
In accordance with one aspect of the invention, there is provided a punch comprising a plate, a socket supported on the plate and including a recess formed therein, a barrel supported above the plate, a shaft slidably received in the barrel and including a bottom end extended downward and outward of the barrel, a mold piece, means for detachably securing the mold piece to the bottom end of the shaft, means for moving the shaft and the mold piece downward to actuate on the socket.
The moving means includes at least one lever having a first end pivotally secured to the barrel at a pivot axle and having a middle portion, and a pin engaged through the middle portions of the lever and engaged through the shaft for coupling the lever to the shaft. The barrel includes at least one oblong hole formed therein for slidably receiving the pin and for guiding the pin to be moved up and down relative to the barrel. The shaft includes at least two holes formed therein for selectively receiving the pin. A spring means is further provided for biasing the shaft and the mold piece away from the socket.
The detachably securing means includes a ferrule rotatably secured to the shaft, and means for attaching the mold piece to the ferrule. The attaching means includes an inner thread formed in the ferrule, and an outer thread formed on the mold piece and threaded with the inner thread of the ferrule to secure the mold piece to the ferrule. A device is further provided for preventing the mold piece from rotating relative to the shaft and includes a stud extended from the shaft, and a cavity formed in the mold piece for receiving the stud of the shaft, the cavity of the mold piece and the stud of the shaft include a corresponding non-circular cross section for preventing the mold piece from rotating relative to the shaft.
A device is further provided for preventing the socket from rotating relative to the plate and includes one or more projections extended inward of an opening of the plate, and one or more notches formed in the socket for receiving the projections and for preventing the socket from rotating relative to the plate.
The socket includes a recess formed therein, the mold piece includes a mold element extended therefrom for engaging into the recess of the socket. A pad is further engaged into the recess of the socket.
Further objectives and advantages of the present invention will become apparent from a careful reading of a detailed description provided hereinbelow, with appropriate reference to accompanying drawings.
REFERENCES:
patent: 2359699 (1944-10-01), Valentine
patent: 3108558 (1963-10-01), Galvin
patent: 3748940 (1973-07-01), Muri
patent: 4281459 (1981-08-01), Krieg
patent: 4487566 (1984-12-01), Barna
patent: 5303625 (1994-04-01), Hai-Shen
patent: 5560110 (1996-10-01), Haines
patent: 5647278 (1997-07-01), Wu
patent: 6076447 (2000-06-01), Damask
patent: 6089137 (2000-07-01), Lee
Pryor Sean
Rachuba M.
Yu Hsun Hsuan
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