Chucks or sockets – Pivoted jaw – Cam-sleeve actuated
Reexamination Certificate
1998-11-23
2001-10-23
Bishop, Steven C. (Department: 3722)
Chucks or sockets
Pivoted jaw
Cam-sleeve actuated
C279S004010, C279S108000, C279S123000
Reexamination Certificate
active
06305697
ABSTRACT:
FIELD OF THE INVENTION
This invention related to clamps and more particularly to rotary clamps used to hold metal casting trees during a cutting operation.
BACKGROUND OF THE INVENTION
In metal casting operations, several identical articles are simultaneously cast as a cluster or tree. The various articles must be cut from the tree or cluster. In some conventional practices, the cast articles are cut from the tree by a power driven, manually manipulated saw. This type of operation is dangerous and sometimes results in injury to the operator.
SUMMARY OF THE INVENTION
It is an object of this invention to provide an improved rotary clamping device for gripping and holding metal casting trees during a cutting operation regardless of the shape or configuration of the sprue or other part to be gripped.
Another object of this invention is to provide an improved rotary clamping device of elongate configuration for reaching and gripping internally located sprues of metal castings to be cut.
Another object of this invention is to provide a rotary clamping device having recessed clamping jaws for effectively clamping sprues or other parts of metal casting to be cut.
REFERENCES:
patent: 445695 (1891-02-01), Grout et al.
patent: 791027 (1905-05-01), Heupel
patent: 2708118 (1955-05-01), Kuchenbrod
patent: 2859042 (1958-11-01), Drissner et al.
patent: 3244430 (1966-04-01), Buck
patent: 4211123 (1980-07-01), Mack
patent: 5044421 (1991-09-01), Tebbe
Bains Herman H
Bishop Steven C.
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