US3773221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the fine dosaging of substances
Assignee: Zimmermann A Maschinenbau
•
Filing: 1971-12-29
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Granted: 1973-11-20
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Expires: 1991-12-29
Abstract
Abstract Apparatus for the fine dosaging of substances, more particularly substances tending to form bridges and to cake together, by means of a feed device removing the material in small quantities from a supply container, and possibly a weighing device connected thereto, characterised in that the feed device comprises a known worm which is taken laterally out of the supply container and is surrounded by an elastomeric guide tube, the guide tube supported at places by a concentric, relatively large supporting tube which is secured to the supply container. The supply container comprises a loosening floor for the material resting on it and the loosening floor consists of an air-pervious material at the underside of which air pressure impulses or blasts can be applied.
Inventors
- 👤 A Lesk
- 👤 O Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:42
CPC Classifications
B; B65; B65G; B65G65/00; B65G65/30; B65G65/34; B65G65/40; B65G65/46; B65B; B65B1/00; B65B1/04; B65B1/18; B65D; B65D88/00; B65D88/54; B65D88/72
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
175 words
An apparatus for the precise dosaging of accretion-like and bridging-type materials comprising a supply container for containing one of an accretion-like and a bridging-type material, loosening floor means disposed at the bottom of the supply container for dislodging the material lying on the floor, a feed worm projecting from a side of the supply container for conveying the material from the supply container, an elastomeric guide tube arranged concentrically about the feed worm for expansion by materials forming on walls of the guide tube, the materials formed on the walls being fragmented off by the expansion of the tube, and a weighing device operatively connected to an output end of the feed worm for controlling the feed worm in response to a predetermined amount of material conveyed by said feed worm, said weighing device including an elastomeric weighing container wherein precise dosaging of accretion-like and bridging-type material is obtained in a batchwise manner by feeding predetermined amounts of the material from the supply container to the weighing device by controlled operation of the feed worm.
Claim 2
Independent Claim
175 words
An apparatus for the precise dosaging of accretion-like and bridging-type materials comprising a supply container for containing one of an accretion-like and a bridging-type material, loosening floor means disposed at the bottom of the supply container for dislodging the material lying on the floor, a feed worm projecting from a side of the supply container for conveying the material from the supply container, an elastomeric guide tube arranged concentrically about the feed worm for expansion by materials forming on walls of the guide tube, the materials formed on the walls being fragmented off by the expansion of the tube, and a weighing device operatively connected to an output end of the feed worm for controlling the feed worm in response to a predetermined amount of material conveyed by said feed worm, said weighing device including an elastomeric weighing container wherein precise dosaging of accretion-like and bridging-type material is obtained in a batchwise manner by feeding predetermined amounts of the material from the supply container to the weighing device by controlled operation of the feed worm.
Claim 3
Dependent Claim
43 words
Apparatus according to claim 1, in which the guide tube is supported by a concentric, relatively large supporting tube secured at one end to the supply container and connected at a second end to the guide tube by means of a ring clamp.
Claim 4
Dependent Claim
27 words
Apparatus according to claim 1, in which the loosening floor includes an air-previous material at the underside of which air pressure impulses or blasts may be applied.
Claim 5
Dependent Claim
23 words
Apparatus according to claim 3, in which the air-pervious loosening floor forms the upper closure of a chamber into which compressed-air conduit opens.
Claim 6
Dependent Claim
24 words
Apparatus according to claim 4, in which the compressed-air conduit comprises control means for producing pressure impulses with a duration of about 1/10 s.
Claim 7
Dependent Claim
44 words
Apparatus according to claim 1, in which the weighing container consists of a flexible rubber tube which narrows in the downward direcTion, and is clamped in the longitudinal direction, and the lower open end of which tube is adapted to be closed by pinching.
Claim 8
Dependent Claim
60 words
Apparatus according to claim 6, in which the flexible rubber tube at its lower end is taken through a rigid ring connected to a compressed-air conduit, while between the ring and the flexible tube there is an elastomeric sleeve which is adapted to have compressed air admitted to it and which is connected in air-tight manner to the rigid ring.
Claim 9
Dependent Claim
28 words
Apparatus according to claim 7, in which the flexible rubber tube is adapted to be clamped between the rigid ring and a flange which holds its upper end.
Claim 10
Dependent Claim
19 words
Apparatus according to claim 8, in which between the rigid ring and the flange a clamping rod is inserted.
Claim 11
Dependent Claim
20 words
Apparatus according to claim 1, in which the weighing device is operatively connected to the feed worm in dust-tight manner.
Claim 12
Dependent Claim
22 words
Apparatus according to claim 1, in which the weighing container is suspended on a spring balance which is subjected to a preload.
Claim 13
Dependent Claim
29 words
Apparatus according to claim 1, in which the feed worm is connected at the output end by way of a free coupling to means for driving the feed worm.
Claim 14
Dependent Claim
27 words
Apparatus according to claim 12, in which the means for driving includes a driver element extending from a driving shaft of a motor to the free coupling.
Claim 15
Dependent Claim
35 words
Apparatus according to claim 13, in which the feed worm is formed of a helical spring having an output-region end turn bent up radially outwardly to form an abutment against which the driver element abuts.
Claim 16
Dependent Claim
27 words
Apparatus according to claim 1, further comprising means for driving the feed worm and in which the weighing device includes means for controlling the means for driving.
Claim 17
Dependent Claim
39 words
Apparatus according to claim 15, in which said means for driving includes a motor, and said means for controlling includes switch means for deenergizing the motor in response to predetermined amounts of material being received by the weighing container.
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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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |