US3897658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for finishing workpieces under high vibrating pressure (tentative)
Assignee: Shikishima Tipton Manufacturing Co Ltd
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Filing: 1973-04-17
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Granted: 1975-08-05
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Expires: 1993-04-17
Abstract
Abstract A method and an apparatus for finishing workpieces which are caused to flow in a helical motion together with abrasive media within a circular vibratory finishing tub in the form of a hollow annulus closed at both ends, and more particularly for vibratory finishing of workpieces together with abrasive media in a heavily compressed condition and for separating the mass (a mixture of workpieces and abrasive media) into workpieces and abrasive media. The apparatus has a downwardly inclined or horizontal circular vibratory finishing tub having an opening at the top which is closed in operation, in the form of a hollow annulus, having the radially greatest sectional area at the central portion thereof and the sectional area being gradually smaller toward both ends thereof, so that the mass is caused to flow during vibration with an increased density resulting in a substantially compressed condition of the mass so that workpieces and abrasive media are caused to move in a closely spaced relation which would otherwise be eliminated at every vibrating. By this arrangement the vibrating pressure and action between workpieces and abrasive media are improved and the mass separating efficiency as well as the smoothness of the finished surfaces are also improved considerably.
Inventors
- 👤 Hisamine Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:16
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/06; B24B31/073
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
251 words
An apparatus for vibrating finishing of workpieces under heavy compression force during vibration, comprising a substantially horizontally positioned circular annular vibratory finishing tub, a base, a plurality of springs on said base and supporting said tub thereon, vibrating means on said base having a drive means and a vertical shaft having eccentric weights thereon with one end connected to said drive means and other end connected to said tub, said tub being in the form of a hollow annulus having a mass separating portion and a finishing portion extending around the circumference of said tub from one end of the mass separating portion of the other end thereof, a stationary dam in the bottom thereof at the end of said finishing portion adjacent said other end of said mass separating portion, mass separating means in said means separating portion of said tub adjacent to and above the level of the top of said stationary dam, said tub having a charging opening in the top of said finishing portion adjacent said one end of said mass separating portion and a closure means on said tub for closing and charging opening, said finishing portion having an equal width throughout its circumferential length and having a depth at said charging opening and above said dam less than the depth adjacent the bottom of said dam, and the depth of said finishing portion increasing gradually from said charging opening to the bottom of said dam and from the top to the bottom of said dam.
Claim 2
Independent Claim
251 words
An apparatus for vibrating finishing of workpieces under heavy compression force during vibration, comprising a substantially horizontally positioned circular annular vibratory finishing tub, a base, a plurality of springs on said base and supporting said tub thereon, vibrating means on said base having a drive means and a vertical shaft having eccentric weights thereon with one end connected to said drive means and other end connected to said tub, said tub being in the form of a hollow annulus having a mass separating portion and a finishing portion extending around the circumference of said tub from one end of the mass separating portion of the other end thereof, a stationary dam in the bottom thereof at the end of said finishing portion adjacent said other end of said mass separating portion, mass separating means in said means separating portion of said tub adjacent to and above the level of the top of said stationary dam, said tub having a charging opening in the top of said finishing portion adjacent said one end of said mass separating portion and a closure means on said tub for closing and charging opening, said finishing portion having an equal width throughout its circumferential length and having a depth at said charging opening and above said dam less than the depth adjacent the bottom of said dam, and the depth of said finishing portion increasing gradually from said charging opening to the bottom of said dam and from the top to the bottom of said dam.
Claim 3
Dependent Claim
48 words
An apparatus as claimed in claim 1 in which the depth E of said finishing portion at the bottom of said dam, the depth F of said finishing portion adjacent said charging opening and the deptH G above the top of said dam are in the relationship E>F>G.
Claim 4
Dependent Claim
18 words
An apparatus as claimed in claim 2 in which said depths are in the relation E>F>0.8E and 0.9E>G>0.5E.
Claim 5
Dependent Claim
20 words
An apparatus as claimed in claim 3 in which said depth are in the relation F Congruent 0.9E and 0.8E>G>0.6E.
Claim 6
Dependent Claim
16 words
An apparatus according to claim 1 in which the bottom of said tub is downwardly inclined.
Claim 7
Dependent Claim
60 words
An apparatus according to claim 1 in which a movable flap is pivotally mounted above the stationary dam and leaving the space above the dam in the tub open for flow of the mass when it is pivoted upwardly and blocking said space above the dam for leading the mass up out of the tub when it is pivoted downwardly.
Claim 8
Dependent Claim
23 words
An apparatus according to claim 1 in which the stationary dam has an ascending portion facing upstream and a descending portion facing downstream.
Claim 9
Dependent Claim
43 words
An apparatus according to claim 1 in which said mass separating portion has a sieve in the upper portion of said tub and the distance between the sieve and the inside bottom of the tub is less than the width of the tub.
Claim 10
Dependent Claim
60 words
An apparatus according to claim 1 further comprising a plate in said tub for preventing the backflow of the mass, said plate being mounted on inside of the inner peripheral wall of the tub and having a width of K/4 and a height of K, when K is the width of the tub, vertically and radially of the tub, respectively.
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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |