US3685543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the spreading of concrete
Assignee: Friedrich Wilhelm Schwing GmbH
•
Filing: 1970-06-09
•
Granted: 1972-08-22
•
Expires: 1990-06-09
Abstract
Abstract A machine for delivering concrete from a vehicle to remote locations, which includes an articulated sectional mast having piston and cylinder assemblies enabling adjustment through an arc of 180*. The concrete feed pipes or tubes are carried by the mast sections for conveying concrete from the vehicle to the outer end of the mast structure. The sections of the mast can be folded upon each other in a unique manner to enable convenient transportation thereof from place to place.
Inventors
- 👤 Friedrich Schwing
- 👤 Bernard Meinken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:35
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/02; E04G21/04; E04G21/0418; E04G21/0436; B; B66; B66C; B66C2700/00; B66C2700/03; B66C2700/0321; B66C2700/0357; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6855; Y10T137/6881; Y10T137/8593; Y10T137/8807
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
Apparatus for delivering concrete to remote locations comprising an articulated section mast having a basic arm, an intermediate arm section, and an outer mast section, conduit means for concrete carried by said mast means for forcibly feeding concrete through said conduit means, piston and cylinder assemblies arranged respectively at the joints of said mast sections and directly connected thereto with a cylinder connected to one arm section and its piston connected to another arm section for actuating the sections thereof through an arc of 180* for enabling extension or retraction of selected mast sections, and pivotal connections between said mast sections respectively enabling said outer mast section to be folded between said basic arm and intermediate arm section, and with a substantial portion of the length of said outer arm section wholly offset laterally of the adjacent arm section.
Claim 2
Dependent Claim
139 words
Apparatus for delivering concrete to remote locations comprising an articulated section mast having a basic arm, an intermediate arm section, and an outer mast section, conduit means for concrete carried by said mast means for forcibly feeding concrete through said conduit means, piston and cylinder assemblies arranged respectively at the joints of said mast sections and directly connected thereto with a cylinder connected to one arm section and its piston connected to another arm section for actuating the sections thereof through an arc of 180* for enabling extension or retraction of selected mast sections, and pivotal connections between said mast sections respectively enabling said outer mast section to be folded between said basic arm and intermediate arm section, and with a substantial portion of the length of said outer arm section wholly offset laterally of the adjacent arm section.
Claim 3
Dependent Claim
94 words
Apparatus as claimed in claim 1, in which said conduit means is in the form of a continuous flexible tube disposed, as viewed with the mast sections in extended position, with a length thereof along one side of said basic arm, a length thereof along the upper edge of said intermediate arm section, and another length thereof along an opposite side of said outer arm section, the tube arrangement being such that the arm sections can be folded together with the outer arm section disposed between said basic arm and said intermediate arm section.
References Cited (Backward Citations)
US3126913A
Cited
US2674500A
Cited
US2948306A
Cited
US3221772A
Cited
US3409046A
Cited
US3451427A
Cited
US3399909A
Cited
US3459222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |