US3645458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrating grinding mill
Assignee: Individual
•
Filing: 1970-01-29
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Granted: 1972-02-29
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Expires: 1990-01-29
Abstract
Abstract A miniature grinding device for grinding small samples which comprises an electrically driven vibratory structure including an eccentrically weighted shaft, a frame supported on said shaft, one or more cylindrical grinding chambers secured to said frame and an axially aligned free-moving grooved rod or roller in each chamber, each said rod having a size slightly less than the inside volume of each chamber.
Inventors
- 👤 Hideharu Tobe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:40
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
A grinding apparatus for producing a finely divided powder of a sample material, comprising: vibratable means operative to oscillate uniformly and including at least one cylindrical chamber for reception of the material to be ground, with a grooved rod axially disposed within said at least one cylindrical chamber; a platform operative to support said vibratable means; spring means disposed between said platform and said vibratable means so that the vibratable means normally rests on said spring means in a position of equilibrium; a pair of support means spaced apart from one another, each support means comprising a rigid portion, a resilient beam extending in both directions from said rigid portion, and a pair of rigid stands for supporting the ends of said resilient beam, each support means being disposed so that said resilient beams are parallel with a rotary shaft, between the undersurface of said vibratable means and said platform; and said rotary shaft being a motor-driven shaft rotably supported transversely with respect to said vibratable means, with an unbalanced weight being disposed on said shaft.
Claim 2
Dependent Claim
176 words
A grinding apparatus for producing a finely divided powder of a sample material, comprising: vibratable means operative to oscillate uniformly and including at least one cylindrical chamber for reception of the material to be ground, with a grooved rod axially disposed within said at least one cylindrical chamber; a platform operative to support said vibratable means; spring means disposed between said platform and said vibratable means so that the vibratable means normally rests on said spring means in a position of equilibrium; a pair of support means spaced apart from one another, each support means comprising a rigid portion, a resilient beam extending in both directions from said rigid portion, and a pair of rigid stands for supporting the ends of said resilient beam, each support means being disposed so that said resilient beams are parallel with a rotary shaft, between the undersurface of said vibratable means and said platform; and said rotary shaft being a motor-driven shaft rotably supported transversely with respect to said vibratable means, with an unbalanced weight being disposed on said shaft.
Claim 3
Dependent Claim
30 words
A grinding apparatus according to claim 1 wherein said at least one cylindrical chamber is separable into two parts by a joint of elastic material having a T-shaped cross section.
Claim 4
Dependent Claim
26 words
A grinding apparatus according to claim 1 wherein said vibratable means comprises first and second cylindrical chambers, each chamber having a grooved rod axially disposed therein.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |