Patent US3620508A successfully refreshed from Google Patents.
US3620508A
Expired / Lapsed
US
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Apparatus for filling dental mold flasks
Assignee: Evonik Operations GmbH
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Filing: 1969-09-26
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Granted: 1971-11-16
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Expires: 1989-09-26
Abstract
Abstract A device to vibrate dental mold flask as the investment material is being placed in the flask to form the mold in which the operator may have both hands free to manipulate the flask and the container in which the investment material was mixed. The vibrating device being activated by placing the mold on the device which includes a lever to be vibrated by a cam.
Inventors
- 👤 Hans Lea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:04
CPC Classifications
A; A61; A61C; A61C19/00; B; B22; B22C; B22C15/00; B22C15/10; B22C15/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
An apparatus for vibrating the flask in making a mold, said apparatus comprising a ball element, means to vibrate said ball and switch means activated by downward pressure on said ball to actuate said means to vibrate said ball, whereby when said ball is pressed downwardly by a flask, the flask will be vibrated.
Claim 2
Independent Claim
54 words
An apparatus for vibrating the flask in making a mold, said apparatus comprising a ball element, means to vibrate said ball and switch means activated by downward pressure on said ball to actuate said means to vibrate said ball, whereby when said ball is pressed downwardly by a flask, the flask will be vibrated.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 in which said ball is mounted on a lever, and said switch means is operated by movement of said lever.
Claim 4
Dependent Claim
35 words
The apparatus of claim 2 in which said lever is provided with a roller bearing which is moved by movement of said lever into a position for engagement with said means to vibrate said ball.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |