US3568575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure fluid operable excavating machine
Assignee: Eisenwerk Rothe Erde GmbH
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Filing: 1969-03-19
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Granted: 1971-03-09
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Expires: 1989-03-19
Abstract
Abstract For use in connection with an implement, especially of the excavating and earth-working type, which has a rotatable part and a part normally held stationary during the working of the implement, a turntable which includes: a supporting member connectable to a stationary part, a plurality of antifriction bearing means supported by said supporting member along a circular path, a rotatable member forming a platform and being connectable to a rotatable part, fluid operable cylinder piston means having one element thereof pivotally connected to one of said members, rotatable brake or braking means operatively connected to another element of said cylinder piston means and operable selectively to establish a coupling connection of said other element with the other one of said members and to interrupt said brake connection to permit movement of said other element relative to said other member.
Inventors
- 👤 Albert Hagen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:22
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/08; E02F9/10; E02F9/12; E02F9/121; E02F9/123
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
For use in Connection with an implement, especially of the excavating and earth-working type, which has a rotatable part and a part normally held stationary during the working of the implement, a turntable which includes: a supporting member connectable to a stationary part, a plurality of antifriction bearing means supported by said supporting member along a circular path, a rotatable member forming a platform and being connectable to a rotatable part, fluid operable cylinder piston means having one element thereof pivotally connected to one of said members, rotatable braking means operatively connected to another element of said cylinder piston means and operable selectively to establish a coupling connection of said other element with the other one of said members and to interrupt said braking connection to permit movement of said other element relative to said other member.
Claim 2
Dependent Claim
137 words
For use in Connection with an implement, especially of the excavating and earth-working type, which has a rotatable part and a part normally held stationary during the working of the implement, a turntable which includes: a supporting member connectable to a stationary part, a plurality of antifriction bearing means supported by said supporting member along a circular path, a rotatable member forming a platform and being connectable to a rotatable part, fluid operable cylinder piston means having one element thereof pivotally connected to one of said members, rotatable braking means operatively connected to another element of said cylinder piston means and operable selectively to establish a coupling connection of said other element with the other one of said members and to interrupt said braking connection to permit movement of said other element relative to said other member.
Claim 3
Dependent Claim
50 words
A turntable according to claim 1, in which said cylinder piston means has one of its two elements formed by the cylinder means and the piston rod means thereof pivotally connected to said rotatable member and has its other one of said two elements pivotally connected to said braking means.
Claim 4
Dependent Claim
47 words
A turntable according to claim 1, in which said supporting member is formed by two annular sections detachably connected to each other so as to define a C-shaped cross section with the free ends of said C-shaped cross section facing the axis of rotation of said turntable.
Claim 5
Dependent Claim
43 words
A turntable according to claim 3, in which said braking means are interposed between said two annular sections of said supporting member and are located within the space defined by the inner sides of said C-shaped cross sectional part of said supporting member.
Claim 6
Dependent Claim
69 words
A turntable according to claim 4, in which said braking means comprises upper pressure member means, lower pressure member means, and hose means interposed between said upper and lower pressure member means and provided with means for selectively conveying pressure fluid into or releasing fluid from said hose means to thereby respectively establish or interrupt braking connection between said supporting member and said upper and lower pressure member means.
Claim 7
Dependent Claim
57 words
A turntable according to claim 5, in which said upper and lower pressure member means are provided with guiding surfaces for guiding each other in their movement during the establishment and interruption of said braking connection with said supporting member, said hose means having its peripheral surface fully surrounded by said upper and lower pressure member means.
Claim 8
Dependent Claim
27 words
A turntable according to claim 4, which includes friction lining means interposed between said upper and lower pressure member means and adjacent surfaces of said supporting member.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |