Carrier for a heavy load including a boom |
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| 申请号 | US3768670D | 申请日 | 1972-03-10 | 公开(公告)号 | US3768670A | 公开(公告)日 | 1973-10-30 |
| 申请人 | SPECIAL MACHINERY INC; | 发明人 | CLOUD J; | ||||
| 摘要 | A self-propelled carrier, which also may be towed, has a fixed platform on which a heavy load such as a concrete burial vault, for example, may be supported. The vault may be moved to and from the platform by a vertically movable hook, which is supported on a trolley movable along a boom parallel to the boom''s longitudinal axis. The boom is supported intermediate its ends by a movable mast so that the boom may be lowered and raised independently of the vertical movement of the hook. The forward end of the boom has control members connected thereto to cause both tilting of the boom about a horizontal axis perpendicular to its longitudinal axis and pivoting of the boom about a vertical axis. | ||||||
| 权利要求 | 1. A carrier including: a frame supported by a plurality of wheels; said frame having a fixed platform to support a load; a boom; first and second means mounted on said frame in spaced relation to each other in the longitudinal direction of said boom to support said boom at two longitudinally spaced portions of said boom; at least one of said first and second mounted means supporting said boom intermediate its ends; said first mounted means supporting said boom for pivotal movement about a vertical axis; means to maintain the vertical axis against movement relative to said frame; said boom being disposed in spaced relation to said platform by said first and second mounted Means; first moving means to pivot said boom about the vertical axis; second moving means to shift said boom bodily vertically relative to said platform; load supporting means supported by said boom; third moving means to move said load supporting means vertically relative to said boom and said platform and independently of said first and second moving means; and fourth moving means to move said load supporting means parallel to the longitudinal axis of said boom and within the confines of the length of said boom. 2. The carrier according to claim 1 in which: said second mounted means includes said first moving means; and said first moving means includes means connected to said frame and said boom. 3. The carrier according to claim 2 in which said connected means of said first moving means includes a pair of control means, each of said control means being universally connected to said frame and said boom. 4. The carrier according to claim 3 in which: said load supporting means includes: a trolley supported on said boom for movement on said boom parallel to the longitudinal axis of said boom; a hook sheave supported on said trolley for mmovement therewith; and a hook universally supported on said hook sheave for connection to the load. 5. The carrier according to claim 4 in which said fourth moving means includes means to move said trolley along said boom and said third moving means includes means to move said hook sheave vertically relative to said trolley. 6. The carrier according to claim 2 in which said connected means of said first moving means is connected to said boom adjacent one end thereof. 7. The carrier according to claim 1 in which: said load supporting means includes: a trolley supported on said boom for movement on said boom parallel to the longitudinal axis of said boom; a hook sheave supported on said trolley for movement therewith; and a hook universally supported on said hook sheave for connection to the load. 8. The carrier according to claim 7 in which said fourth moving means includes means to move said trolley along said boom and said third moving means includes means to move said hook sheave vertically relative to said trolley. 9. The carrier according to claim 1 in which said first mounted means includes means forming part of said second moving means. 10. The carrier according to claim 1 in which: said carrier has a single front wheel; means to steer said front wheel; and means to raise and lower said front wheel relative to said frame, said raising and lowering means moving said front wheel to any position between a fully extended position and a fully retracted position, said raising and lowering means including means to retain said front wheel in the position to which it is moved. 11. The carrier according to claim 1 in which: said first mounted means includes means to support said boom for pivotal movement about a horizontal axis; and said first moving means includes means to pivot said boom about the horizontal axis. 12. The carrier according to claim 2 in which said connected means of said first moving means is universally connected to said frame and said boom. 13. The carrier according to claim 2 in which said first mounted means includes means forming part of said second moving means. 14. The carrier according to claim 13 in which said connected means of said first moving means is connected to said boom adjacent one end thereof. |
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