US3730055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic drive for a turning connection with balls
Assignee: Fried Krupp AG Hoesch Krupp
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Filing: 1971-02-24
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Granted: 1973-05-01
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Expires: 1991-02-24
Abstract
Abstract A hydraulic drive for a rotary connection for use in connection with implements having a rotatable upper part and a non-rotatable lower part, in which the rotatable housing means of radial piston motor means are arranged in a chamber defined by inner ring means adapted to be connected to the non-rotatable lower part and by outer ring means adapted to be connected to the rotatable outer part while said housing means has outer teeth meshing with teeth of said inner ring means, and while said outer ring means comprises conduit means adapted to be connected to a source of pressure fluid and communicating with the interior of said radial piston motor means.
Inventors
- 👤 W Schluter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:24
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/84; B66C23/86; E; E02; E02F; E02F9/00; E02F9/08; E02F9/10; E02F9/12; E02F9/121; E02F9/123
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
185 words
A hydraulic drive for a rotary connection employing balls and to be used in connection with implements having a rotatable upper part and a non-rotatable lower part, which includes: inner ring means for connection to a non-rotatable lower part of an implement, said inner ring means having inner teeth, outer ring means for connection to a rotatable upper part of an implement, at least one circular row of balls interposed between said inner ring means and said outer ring means to permit rotation of said outer ring means relative to said inner ring means, said inner ring means and said outer ring means defining with each other chamber means, and radial piston motor means arranged in said chamber means and having rotatable housing means with outer teeth meshing with said inner teeth of said inner ring means, said radial piston motor means also including central means, and said outer ring means including an upper section having said central means connected thereto and having conduit means leading into said radial piston motor means and being adapted to be connected to a source of fluid under pressure.
Claim 2
Dependent Claim
185 words
A hydraulic drive for a rotary connection employing balls and to be used in connection with implements having a rotatable upper part and a non-rotatable lower part, which includes: inner ring means for connection to a non-rotatable lower part of an implement, said inner ring means having inner teeth, outer ring means for connection to a rotatable upper part of an implement, at least one circular row of balls interposed between said inner ring means and said outer ring means to permit rotation of said outer ring means relative to said inner ring means, said inner ring means and said outer ring means defining with each other chamber means, and radial piston motor means arranged in said chamber means and having rotatable housing means with outer teeth meshing with said inner teeth of said inner ring means, said radial piston motor means also including central means, and said outer ring means including an upper section having said central means connected thereto and having conduit means leading into said radial piston motor means and being adapted to be connected to a source of fluid under pressure.
Claim 3
Dependent Claim
50 words
A hydraulic drive according to claim 1, in which said upper section of said outer ring means has a supporting extension extEnding into said chamber means, and which includes supporting plate means supported by said supporting extension and in its turn supporting said central means of said piston motor means.
Claim 4
Dependent Claim
65 words
A hydraulic drive according to claim 2, in which said conduit means include two annular passages provided in the upper surface of said upper section of said outer ring means and provided with means for connection to a source of oil under pressure, and also includes bores extending through said upper section and establishing fluid communication between said annular passages and said piston motor means.
Claim 5
Dependent Claim
24 words
A hydraulic drive according to claim 3, which includes braking means arranged within said chamber means and operatively connected to said rotatable housing means.
Claim 6
Dependent Claim
17 words
A hydraulic drive according to claim 4, in which said braking means includes a hydro-mechanical band brake.
Claim 7
Dependent Claim
23 words
A hydraulic drive according to claim 5, in which said band brake comprises a brake drum forming part of said rotatable housing means.
Claim 8
Dependent Claim
40 words
A hydraulic drive according to claim 1, in which said radial piston motor means includes a plurality of radial piston motors arranged in evenly spaced relationship to each other along a circle around the center portion of said rotary connection.
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |