Patent US4402428A successfully refreshed from Google Patents.
US4402428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dosing apparatus for viscous materials
Assignee: Ludwig Schwerdtel GmbH
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Filing: 1981-03-17
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Granted: 1983-09-06
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Expires: 2001-03-17
Abstract
Abstract A dosing device for viscous materials, especially for paints, has a dosing cylinder, in which is disposed a dosing piston coupled with a hydraulically chargeable piston cylinder drive. A multi-way valve is placed ahead of the dosing cylinder to which is connected, on the one hand, a line for the supply of the material and, on the other hand, a pressure line for extrusion of the metered material by a drive, via a dispensing valve. The lines can be connected to the dosing cylinder selectively. The apparatus is embodied as a mobile unit. An open storage container is provided, from which originates the line for the supply of the material to the dosing cylinder which is embodied as a suction line. The drive is operatively arranged to effect the suction operation of the dosing piston.
Inventors
- 👤 Hans-Jorg Lang
- 👤 Ernst Schwerdtel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:45
CPC Classifications
G; G01; G01F; G01F11/00; G01F11/02; G01F11/021
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
In a dosing device for viscous materials, especially for paints, including a dosing cylinder in which is disposed a dosing piston coupled with a hydraulically chargeable piston cylinder drive, a multi-way valve disposed downstream of the dosing cylinder and connected on one side to a line for supply of the materials and on another side to a pressure line for the extrusion of metered material by means of the drive via a dispensing valve, each of said lines being selectively connected to the dosing cylinder, the improvement comprising: an open storage container, said dosing cylinder defining suction-producing means, said line for the supply of the material to the dosing cylinder interconnecting said storage container with said suction apparatus, a feed station monitoring device associated with said storage container having a pre-stressable compression spring coupled to first switching means for monitoring the minimal amount of fill in said container as well as an adjustable spring coupled to a second switching means for monitoring the maximal amount of fill in said container.
Claim 2
Dependent Claim
170 words
In a dosing device for viscous materials, especially for paints, including a dosing cylinder in which is disposed a dosing piston coupled with a hydraulically chargeable piston cylinder drive, a multi-way valve disposed downstream of the dosing cylinder and connected on one side to a line for supply of the materials and on another side to a pressure line for the extrusion of metered material by means of the drive via a dispensing valve, each of said lines being selectively connected to the dosing cylinder, the improvement comprising: an open storage container, said dosing cylinder defining suction-producing means, said line for the supply of the material to the dosing cylinder interconnecting said storage container with said suction apparatus, a feed station monitoring device associated with said storage container having a pre-stressable compression spring coupled to first switching means for monitoring the minimal amount of fill in said container as well as an adjustable spring coupled to a second switching means for monitoring the maximal amount of fill in said container.
Claim 3
Dependent Claim
15 words
An improved dosing apparatus according to claim 1, wherein said storage container is freely interchangeable.
Claim 4
Dependent Claim
15 words
An improved dosing apparatus according to claim 2, wherein said suction line is freely interchangeable.
Claim 5
Dependent Claim
15 words
An improved dosing apparatus according to claim 3, wherein said dosing cylinder is freely interchangeable.
Claim 6
Dependent Claim
14 words
An improved apparatus according to claim 2, wherein said dosing cylinder is freely interchangeable.
Claim 7
Dependent Claim
14 words
An improved apparatus according to claim 1, wherein said suction line is freely interchangeable.
Claim 8
Dependent Claim
15 words
An improved dosing apparatus according to claim 1, wherein said dosing cylinder is freely interchangeable.
Claim 9
Dependent Claim
15 words
An improved dosing apparatus according to claim 7, wherein said storage container is freely interchangeable.
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) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |