Patent US3642399A successfully refreshed from Google Patents.
US3642399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugally cast pipe fittings
Assignee: Deutsche Fibercast GmbH
•
Filing: 1969-10-09
•
Granted: 1972-02-15
•
Expires: 1989-10-09
Abstract
Abstract An apparatus for centrifugally casting wherein a plurality of molds surround a resin tank on a centrifuge table. Feed lines communicate between each mold and the lower portion of the tank. Vent lines communicate between each mold and the upper part of the tank.
Inventors
- 👤 Rudolf F Barainsky
- 👤 Richard Kiefer
- 👤 Hartmut Pankuweit
- 👤 Alfred G Esser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:55
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/36; B29C33/00; B29C33/10; B29C39/00; B29C39/02; B29C39/04; B29C39/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
141 words
Arrangement for the manufacture of preferably glass-fiber reinforced castings of casting resin, for instance, epoxy resin which is subjected to a centrifugal force during the molding process, wherein it flows via pipes to cavities which contain the glassfiber fabric, of parted molds (9) moving along a circular path, characterized by that the molds (9) are arranged about an axis of rotation on a circle in such a manner that each mold (9) is closest to the center of rotation only with a narrowly limited part of its cavity (8) and is connected at this pint to pipe lInes (7; 10), of which always one line (7) feeds the resin (5) from a centrally arranged tank (6) into the mold (9), while the other line (10) serves for the venting and overflow of the mold (9) and returns to the fill tank.
Claim 2
Dependent Claim
141 words
Arrangement for the manufacture of preferably glass-fiber reinforced castings of casting resin, for instance, epoxy resin which is subjected to a centrifugal force during the molding process, wherein it flows via pipes to cavities which contain the glassfiber fabric, of parted molds (9) moving along a circular path, characterized by that the molds (9) are arranged about an axis of rotation on a circle in such a manner that each mold (9) is closest to the center of rotation only with a narrowly limited part of its cavity (8) and is connected at this pint to pipe lInes (7; 10), of which always one line (7) feeds the resin (5) from a centrally arranged tank (6) into the mold (9), while the other line (10) serves for the venting and overflow of the mold (9) and returns to the fill tank.
Claim 3
Dependent Claim
46 words
Arrangement according to claim 1, characterized by that the molds (9) are mounted on a rotary table (1) which drives the tank (6) at the center via a planetary gear at the same angular speed at alternatingly increasing and decreasing distance from the individual molds (9).
Claim 4
Dependent Claim
43 words
Arrangement according to claim 1, characterized in that the tank (6) is arranged adjustable in height, but with the lowest point of its interior space at the same level or higher than the highest point of the cavity (8) of the molds (9).
Claim 5
Dependent Claim
40 words
Arrangement according to claim 1, characterized in that the venting line (10) is brought upwards in the direction of the axis of rotation and has a capacity which is equal or greater than the capacity of the feed line (7).
Claim 6
Dependent Claim
23 words
Arrangement according to claim 1, characterized in that in the venting line (10) provides an organ indicating the completion of the filling operation.
Claim 7
Dependent Claim
92 words
Arrangement according to claim 2, characterized in that the tank (6) is arranged adjustable in height, but with the lowest point of its interior space at the same level or higher than the highest point of the cavity (8) of the molds (9), that the venting line (10) is brought upward in a direction of the axis of rotation and has a capacity which is equal or greater than the capacity of the feed line (7) and that the venting line (10) provides an organ indicating the completion of the filling operation.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |