US4363574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of emptying a powder or like material out of a container
Assignee: DYNATRANS AB
•
Filing: 1980-03-05
•
Granted: 1982-12-14
•
Expires: 2000-03-05
Abstract
Abstract Method of emptying a powder or like material out of a container. The powder (9) is conveyed out of the container (1) from its free upper surface by means of a stream of carrier air in a carrier-air pipe (6; 10; 12) provided with openings for the powder. The emptying is facilitated by means of a stream of secondary air from a secondary-air pipe (7; 11; 13). The container is rotated so that the fixed carrier-air pipe may come into the vicinity of the surface of the powder.
Inventors
- 👤 Anders Bjurling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:26
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/02; B65D88/12; B65D88/128; B65D88/54; B65D88/548; B65G; B65G65/00; B65G65/30; B65G65/34; B65G65/36
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
120 words
The method of emptying a powder or like material out of a cylindrical, rotatable horizontally disposed container having a longitudinal axis by means of a substantially horizontally disposed carrier-air pipe with perforations along its length, comprising the steps of, locating said carrier-air pipe axially along the upper free surface of the powder in said container, passing a stream of carrier-air through an air pipe with perforations along its length disposed parallel to the carrier-air pipe to entrain powder into the perforations of the carrier-air pipe and convey the powder out of the container, and rotating the container about its axis to position the carrier-air pipe along said upper free surface to maintain the carrier-air pipe at said upper free surface.
Claim 2
Independent Claim
120 words
The method of emptying a powder or like material out of a cylindrical, rotatable horizontally disposed container having a longitudinal axis by means of a substantially horizontally disposed carrier-air pipe with perforations along its length, comprising the steps of, locating said carrier-air pipe axially along the upper free surface of the powder in said container, passing a stream of carrier-air through an air pipe with perforations along its length disposed parallel to the carrier-air pipe to entrain powder into the perforations of the carrier-air pipe and convey the powder out of the container, and rotating the container about its axis to position the carrier-air pipe along said upper free surface to maintain the carrier-air pipe at said upper free surface.
Claim 3
Dependent Claim
22 words
The method of claim 1 including the step of introducing powder into the carrier-air pipe uniformly along the length of the pipe.
References Cited (Backward Citations)
US1922330A
Cited
US2219208A
Cited
US2256561A
Cited
US2501047A
Cited
US2518514A
Cited
US2678238A
Cited
US2643796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |