A dosing device with a rotating piston cylinder
Abstract
Abstract A filling device for filling in doses of soft-plastic material with a piston, which comprises a filling housing and a dosaging cylinder rotatably mounted in the housing and alternately into a filling position and an emptying position. A piston reciprocates in the cylinder and is divided by at least one portion of larger diameter and a portion of smaller diameter into a stepped-up piston. The inner surface of the cylinder is stepped down complementary to the stepped-up piston. The stepped-up piston defines in the cylinder an annular chamber at the end face of the portion of the piston having a larger diameter and a cylindrical chamber at the end of the portion of the cylinder having smaller diameter. The filling housing has a filling opening within the range of the chambers, and the cylinder has a lateral opening within the range of the annular chamber and the cylindrical chamber, respectively, thereby providing alternately communication with the housing for filling the chambers and with the opening in the housing, respectively, for emptying the cylinder, depending upon the position of the cylinder.
Inventors
- 👤 Heinz Freckmann
- 👤 Karlheinz Mayer
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |