Chucks or sockets – With fluid-pressure actuator – Socket type
Reexamination Certificate
1999-05-14
2001-01-16
Bishop, Steven C. (Department: 3722)
Chucks or sockets
With fluid-pressure actuator
Socket type
C279S004090, C279S137000
Reexamination Certificate
active
06173971
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to plunger type rotary chuck assemblies that may hold and release the work piece to be processed under fast rotational movements.
2. Description of the Related Art
Taiwan Utility Model Publication No. 315766 entitled “dual direction chuck” and issued on Sep. 11, 1997 discloses a spring chuck for holding a work piece to be cut. Such conventional spring chuck utilizes hydraulic or pneumatic power source and thus requires oil seal and leakproof rubber gasket for restricting passage of working fluid (gaseous or liquid). Such spring chuck rotates at high speed and is subjected to high pressure such that the oil seal and leakproof rubber gasket cannot bear under continuous operation and thus tends to wear, thereby resulting in leakage of the working fluid.
SUMMARY OF THE INVENTION
It is a primary object of the present invention to provide a plunger type rotary chuck assembly including a leakproof member on the fluid passage, the leakproof member only moves rectilinearly to reduce rotary friction, thereby lengthening the life period of the chuck and reducing the malfunction rate.
It is a secondary object of the present invention to provide a plunger type rotary chuck assembly that has a smaller volume and provides a larger holding force and the maintenance thereof is easy so as to be applied to automated devices.
A plunger type rotary chuck assembly in accordance with the present invention includes a main seat in which bearings are mounted for rotatably supporting a main shaft. An inner periphery of an axial hole of the main seat includes a number of fluid passages. A number of piston chambers are provided around and communicated with the axial hole of the main seat such that fluid from the fluid passage controls movements of pistons in the piston chambers and makes a clutch be in an engaged or disengaged status, thereby drawing a spring chuck to a status for holding or releasing a work piece to be processed and thereby making the spring chuck rotate at high speed or stopping the spring chuck.
REFERENCES:
patent: 4032162 (1977-06-01), Flinchbaugh
patent: 4312513 (1982-01-01), Swenson
patent: 315766 (1994-08-01), None
Bacon & Thomas PLLC
Bishop Steven C.
LandOfFree
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