Patent US4101922A successfully refreshed from Google Patents.
Patent US3844071A successfully refreshed from Google Patents.
US3844071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for vibratory finishing
Assignee: Roto Finish Ltd
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Filing: 1973-11-28
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Granted: 1974-10-29
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Expires: 1993-11-28
Abstract
Abstract In a vibratory finishing machine of the type in which an annular tub is vibrated by a motor having a shaft with eccentric weights, reversal of the direction of movement of finishing media around the tub is effected by reversing the relative angular position of the weights, this weight reversal being effected automatically in response to reduction of the motor speed, without the usual requirement of reversing the direction of rotation of the motor. Weights reversal is preferably effected by centrifugal force against the action of a toggle spring device.
Inventors
- 👤 W Barlett
- 👤 F Boniface
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:09
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/06; B24B31/073
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A vibratory finishing machine comprising an annular treatment chamber for a finishing medium and workpieces non rotatably mounted on a spring suspension; a motor securely mounted to said chamber and having a motor shaft disposed vertically on the axis of said chamber; first and second eccentric weights mounted on said shaft in axially spaced relation and angularly spaced relation to each other; and means responsive to interruption of rotation of said motor shaft to effect reversal of the relative angular position of said weights.
Claim 2
Dependent Claim
84 words
A vibratory finishing machine comprising an annular treatment chamber for a finishing medium and workpieces non rotatably mounted on a spring suspension; a motor securely mounted to said chamber and having a motor shaft disposed vertically on the axis of said chamber; first and second eccentric weights mounted on said shaft in axially spaced relation and angularly spaced relation to each other; and means responsive to interruption of rotation of said motor shaft to effect reversal of the relative angular position of said weights.
Claim 3
Dependent Claim
49 words
A machine according to claim 1, wherein one of said weights is constituted by means operable to move the effective mass of said weight between alternate positions, lying on angularly opposite sides of the second weight, these means being operable automatically each time rotation of said shaft is interrupted.
Claim 4
Dependent Claim
93 words
A machine according to claim 1, wherein one said weight comprises a container, a loose mass partially filling said container, means pivotally supporting said container on said motor shaft for rocking movement about a transverse axis, the loose mass being adapted to occupy that end of said container which is lowermost with said shaft at rest at any time and said container being tilted about said transverse axis to cause the other end thereof to be lowermost when said shaft is rotating at its operating speed, by centrifugal forces acting on said mass.
Claim 5
Dependent Claim
45 words
A machine according to claim 3, further comprising toggle acting spring means acting between said shaft and said container and tending to hold the latter in the pivotal position to which it was last moved by the effect of centrifugal forces acting on said mass.
Claim 6
Dependent Claim
70 words
A machine according to claim 1 further Comprising a pivoted flap mounted in the chamber, which flap is adapted to deflect freely to permit circulatory movement of the mixture in one direction around said chamber and which, upon reversal of the circulatory movement, is adapted to assume a position in which it deflects the mixture on to a separating screen which effects separation of the parts from the finishing medium.
References Cited (Backward Citations)
US3606702A
Cited
US3811231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |