Patent US4407983A successfully refreshed from Google Patents.
US3894725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission for twin worm extruders
Assignee: Rheinstahl AG
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Filing: 1973-11-21
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Granted: 1975-07-15
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Expires: 1993-11-21
Abstract
Abstract A transmission for twin worm extruders, in which the worm reaction forces are by worm pinion shafts in the transmission housing conveyed to an axial bearing housing and in the form of pulling forces are returned from a group of axial bearings by spacer bolt means in the transmission housing and spacer plate means between the axial bearing housing and the transmission housing and between the transmission housing and the worm housing to the latter. Some of these spacer bolt means are located below the extensions of the worm shafts in the transmission housing and extend in a contact free manner through sleeves which surround the respective adjacent spacer bolt means in radially spaced relationship thereto and have journaled thereon intermediate gears one of which is through transmission steps drivingly connected to a drive motor. These intermediate gears which are of the same size mesh with each other and respectively are also drivingly connected to one but a different one of the worm pinion shafts.
Inventors
- 👤 Heinrich Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:54
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/02; F16H1/20; F16H1/22; B; B29; B29C; B29C48/00; B29C48/25; B29C48/252; B30; B30B; B30B11/00; B30B11/22; B30B11/24; B30B11/241; B29C48/03; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19079; Y10T74/19084
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
414 words
In combination: a worm housing, first and second worm extruders arranged in said worm housing and extending substantially parallel to each other, a transmission housing, first and second shaft extensions respectively arranged in axial alignment with and drivingly connected to said first and second worm extruders, first intermediate plate means arranged at one side of said transmission housing and between said transmission housing and said worm housing while being connected to said worm housing and being slightly spaced from said transmission housing, second intermediate plate means arranged on the other side of said transmission housing which is opposite said one side of said transmission housing, said second intermediate plate means being connected to said other side of said transmission housing, axial bearing housing means connected to said second intermediate plate means, said first and second shaft extensions extending through said transmission housing into said axial bearing housing means, axial bearing means arranged in said axial bearing housing means and respectively rotatably supporting the adjacent ends of said shaft extensions in said axial bearing housing means, a first group of spacer bolt means located below said first and second shaft extending in said transmission housing and while extending through said transmission housing having its ends firmly connected to said first and second intermediate plate means, a second group of spacer bolt means located above said first and second shaft extensions in said transmission hoUsing and while extending through the latter having its ends firmly connected to said first and second intermediate plate means respectively, first and second sleeve means respectively surrounding the spacer bolt means of said first group of spacer bolt means in a contactfree manner while each sleeve means of said first group of sleeve means had the ends thereof supported by said transmission housing, a pair of first gears having the same pitch circle diameter and the same number of teeth and respectively being journaled in said first and second sleeve means while meshing with each other and a pair of second gears having the pitch circle diameter and the same number of teeth and being respectively keyed to said first and second shaft extensions and respectively meshing with the gears of said pair of first gears, drive motor means and transmission gear means drivingly connected to said pair of first gears for driving the same, whereby said first and second worm extruders are rotatable by said motor means at the same speed but in opposite directions with regard to each other.
Claim 2
Dependent Claim
414 words
In combination: a worm housing, first and second worm extruders arranged in said worm housing and extending substantially parallel to each other, a transmission housing, first and second shaft extensions respectively arranged in axial alignment with and drivingly connected to said first and second worm extruders, first intermediate plate means arranged at one side of said transmission housing and between said transmission housing and said worm housing while being connected to said worm housing and being slightly spaced from said transmission housing, second intermediate plate means arranged on the other side of said transmission housing which is opposite said one side of said transmission housing, said second intermediate plate means being connected to said other side of said transmission housing, axial bearing housing means connected to said second intermediate plate means, said first and second shaft extensions extending through said transmission housing into said axial bearing housing means, axial bearing means arranged in said axial bearing housing means and respectively rotatably supporting the adjacent ends of said shaft extensions in said axial bearing housing means, a first group of spacer bolt means located below said first and second shaft extending in said transmission housing and while extending through said transmission housing having its ends firmly connected to said first and second intermediate plate means, a second group of spacer bolt means located above said first and second shaft extensions in said transmission hoUsing and while extending through the latter having its ends firmly connected to said first and second intermediate plate means respectively, first and second sleeve means respectively surrounding the spacer bolt means of said first group of spacer bolt means in a contactfree manner while each sleeve means of said first group of sleeve means had the ends thereof supported by said transmission housing, a pair of first gears having the same pitch circle diameter and the same number of teeth and respectively being journaled in said first and second sleeve means while meshing with each other and a pair of second gears having the pitch circle diameter and the same number of teeth and being respectively keyed to said first and second shaft extensions and respectively meshing with the gears of said pair of first gears, drive motor means and transmission gear means drivingly connected to said pair of first gears for driving the same, whereby said first and second worm extruders are rotatable by said motor means at the same speed but in opposite directions with regard to each other.
Claim 3
Dependent Claim
35 words
The combination of claim 1, in which the spacer bolt means of said first group of spacer bolt means are substantially parallel to and laterally offset with regard to said first and second shaft extensions.
References Cited (Backward Citations)
US2188717A
Cited
US3795456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |