Patent US4146144A successfully refreshed from Google Patents.
US4146144A
Expired / Lapsed
US
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Apparatus for discharging loose particulate solid material from a storage space
Assignee: Nils Weibull AB
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Filing: 1977-04-21
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Granted: 1979-03-27
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Expires: 1997-04-21
Abstract
Abstract An apparatus for discharging loose particulate solid material from a storage space, for instance the hold of a ship. A screw conveyor is suspended in a carriage mounted at the upper part of the space and is horizontally movable. The carriage has a hoisting machinery for wire ropes in which a beam is suspended along which the conveyor is mounted. At least two stabilizing wire ropes are secured to the beam and run to pulleys on the carriage, which pulleys are so disposed that the wire ropes cross each other at a point between the carriage and the beam. From the pulleys stabilizing wire ropes run to a device for keeping the wire ropes tensioned when the beam is raised, lowered and stationary.
Inventors
- 👤 Olof A. A. Johansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:01
CPC Classifications
B; B65; B65G; B65G65/00; B65G65/30; B65G65/34; B65G65/36; B63; B63B; B63B27/00; B63B27/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
171 words
Apparatus for discharging loose particulate solid material from a storage container having spaced side walls, said apparatus comprising: a carriage; means for mounting said carriage adjacent the top of said storage container so that said carriage is horizontally movable; an elongated beam positioned below said carriage; a screw conveyor mounted to said beam, said conveyor having a length substantially less than the distance between said side walls; flexible means for suspending said beam from said carriage; means on said carriage connected to said flexible suspending means for providing vertical movement of said beam; at least two flexible stabilizing ropes connected to respective ends of said beam and extending to said carriage in such a manner that said stabilizing ropes cross each other between said beam and said carriage; and means on said carriage connected to said stabilizing ropes for maintaining a constant predetermined tension thereon regardless of whether said beam is stationary or is being raised or lowered, said tensioning means being separate and independent from said vertical movement providing means.
Claim 2
Dependent Claim
171 words
Apparatus for discharging loose particulate solid material from a storage container having spaced side walls, said apparatus comprising: a carriage; means for mounting said carriage adjacent the top of said storage container so that said carriage is horizontally movable; an elongated beam positioned below said carriage; a screw conveyor mounted to said beam, said conveyor having a length substantially less than the distance between said side walls; flexible means for suspending said beam from said carriage; means on said carriage connected to said flexible suspending means for providing vertical movement of said beam; at least two flexible stabilizing ropes connected to respective ends of said beam and extending to said carriage in such a manner that said stabilizing ropes cross each other between said beam and said carriage; and means on said carriage connected to said stabilizing ropes for maintaining a constant predetermined tension thereon regardless of whether said beam is stationary or is being raised or lowered, said tensioning means being separate and independent from said vertical movement providing means.
Claim 3
Dependent Claim
44 words
The apparatus recited in claim 1 wherein said tensioning means comprises: a rope drum on which said stabilizing ropes are wound from opposite directions; and a motor of the type that develops full effect when at a standstill and when rotating in either direction.
Claim 4
Dependent Claim
35 words
The apparatus recited in claim 2 wherein said tensioning means further comprises a brake coupled to said rope drum, said brake being operable when said beam is stationary and said screw conveyor is in operation.
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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |