Solid material comminution or disintegration – Apparatus – Hand support comminutor
Reexamination Certificate
2005-04-19
2005-04-19
Rosenbaum, Mark (Department: 3725)
Solid material comminution or disintegration
Apparatus
Hand support comminutor
Reexamination Certificate
active
06880773
ABSTRACT:
A shut device for a discharge outlet in a grinder is disposed at a bottom of the grinder and the shut device includes a stationary part and a rotary part. The stationary part has two concentric curved walls being opposite to each other symmetrically and each of the curved walls at an inner side protrudes a tenon next to an end thereof respectively. The rotary part is a step-shaped cap with an abrupt fitting ring corresponding to the two curved walls so as to fit with the two curved walls such that the top of the fitting ring can keep contact with the discharge outlet at the circumference thereof. The rotary part has an annular surface with two L-shaped guide grooves corresponding to the two tenons so that the tenons can be inserted into the guide grooves to form an engagement respectively. There are hollow openings and stop plates are alternately disposed at the center of rotary part to correspond three locating points of opening, shutting and detaching from the discharge outlets and three positioning projections being provided on the guide grooves in accordance with the three locating points. Once the rotary part is turned, the tenons can move along the guide grooves and engage with the locating points one at a time respectively such that the hollow openings can align with the discharge outlet for ground powder falling down or the stop plates close the discharge outlet for preventing the powder from falling down.
REFERENCES:
patent: 3130927 (1964-04-01), Schmieding
patent: 4231527 (1980-11-01), Bounds
patent: 4771955 (1988-09-01), Paulson
patent: 4960246 (1990-10-01), Fohrman
patent: 5709346 (1998-01-01), Bounds et al.
Rosenbaum Mark
Troxell Law Office PLLC
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