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| Number | Title | Issue Date |
| 7308953 | Mobile drilling rig An embodied mobile drilling rig is made of three sections, two substructures and a mast section, which are easily transported and installed at a drilling site. Each substructure includes a mast starting section; a floor side box connected to the mast starting sectio... | 12/18/2007 |
| 7306055 | Automatic method for installing mobile drilling rig at a drilling site A method for installing a mobile drilling rig at a drilling site entails transporting the mobile drilling rig to the drilling site, wherein the mobile drilling rig is made three sections: two substructures and a mast section. The substructures are placed parallel to... | 12/11/2007 |
| 7231741 | Mobile cellular telephone tower A mobile cellular telephone tower comprises a self-propelled base and a tower connected to the base. The tower includes a base segment and at least a first extendable segment operatively connected to a second extendable segment. A winch is connected to the base, and... | 06/19/2007 |
| 7089705 | Portable tower system A portable surveillance system having an easily transportable skid-type base structure that forms a support for a portable tower apparatus. Stabilizers are extendably mounted to the base structure. The tower components include a base member affixed to the base plate... | 08/15/2006 |
| 6951082 | Drilling rig with torque carrier A telescoping rig with an upper mast telescopingly received within a lower mast. A torque carrier is formed of an upper part suspended within the upper mast and a lower part attached to the lower mast. The lower part may be secured to the upper part when the rig is ... | 10/04/2005 |
| 6290377 | Pneumatically telescoping mast having DC operated lighting and pivoting means An improved pneumatically telescoping mast supported for pivotal movement in opposite directions is provided. The mast includes adjacent telescoping sections slidable relative to one another between retracted and extended positions. A pneumatic control sy... | 09/18/2001 |
| 5572836 | Rotational flagpole Disclosed is a rotational flagpole pivotally mounted to a rigidly affixed base with a tongue and slot combination that enables the flagpoles to rotate around the pivot. The flagpole can also be locked in place to prevent rotation. The rotational flagpole ... | 11/12/1996 |
| 5570546 | System for raising and lowering communications equipment A system for lowering and raising telecommunications equipment along a mast pole. The system comprises a mast pole, a platform means, a frame means, a plurality of lift cables, a hoisting means and a transition means. The platform means surrounds the exte... | 11/05/1996 |
| 5524398 | Portable collapsible tower A portable collapsible tower including a frame, at least one stationary tower member fixed to the frame and at least one movable tower member movable along the exterior portion of the stationary tower member relative to the stationary member. A coupling, ... | 06/11/1996 |
| 5058336 | Hinged flange pole A column is attached at a base flange to a plate of a base member by way of an offset horizontal pivot, and can be pivotally raised and lowered by means of a ram. The pivot lies in the general plane of the flange and the plate so that, when the column is ... | 10/22/1991 |
| 4807409 | Vented fascia board A vented fascia board construction positioned between the soffit and the roof of a building to insure a smooth flow of air to the roof area. The fascia board is constructed of vent material which forms a plurality of tubular openings or passages which ext... | 02/28/1989 |
| 4634335 | Elongate, transportable unit standing upright during use An elongate, transportable unit (1) standing upright during use and being intended for transport with the aid of a vehicle (7) provided with a loading bridge (8) which can be turned about a pivot axis located near the rear end of the chassis of the vehicl... | 01/06/1987 |
| 4616454 | Slant service rig A guide mat for a slant service or drill rig. The guide mat comprises rearward and forward portions and an open area in the rearward portion which is used to allow access to a wellhead. Adjustable pedestals are provided which move in orthogonal planes to ... | 10/14/1986 |
| 4602462 | Boom articulating mechanism for aerial devices In a truck mounted overcenter aerial device having an articulating boom assembly, a mechanism for articulating the upper boom relative to the lower boom. A star wheel on the upper boom is acted upon by a pair of linkages powered by hydraulic cylinders mou... | 07/29/1986 |
| 4598509 | Method and apparatus for raising and lowering a telescoping mast Method and apparatus for raising and lowering a telescoping mast. A telescoping mast having an upper section slidably received within a lower section is pivotally connected to a base in a horizontal position. A line is connected to the lower end of the up... | 07/08/1986 |
| 4592177 | Column-mounted appliances An upper part of a column can be pivotally lowered and raised relative to a lower part thereof for servicing of an appliance mounted thereon. However, before the column part can be lowered it must be raised through a limited vertical displacement relative... | 06/03/1986 |
| 4581862 | Drilling equipment tower raising mechanism A raising mechanism for drilling equipment towers mounted on a platform and having two pairs of linkage members, one shorter than the other one, each pair having its members connected on one end to each other and to the underside of the tower at spaced ap... | 04/15/1986 |
| 4575976 | Extension and retraction system for boom apparatus An extension and retraction system for a multiple section, telescoping boom apparatus of the type utilized for raising and lowering a work platform or basket. The innermost longitudinally movable section is carried by a longitudinally inextensible or base... | 03/18/1986 |
| 4492501 | Platform positioning system A platform positioning system for a drilling device of the type which includes a support structure and a transfer arm pivotally connected to the support structure to rotate about a first axis is disclosed. This platform positioning system includes a platf... | 01/08/1985 |
| 4465420 | Self-erecting portable paving mix silo A self-erecting silo assembly comprises a horizontally elongated trailer frame and a cylindrical paving mix bin that overlies the frame when in a horizontal transport position, with its front side lowermost and its top end near a front end of the frame. R... | 08/14/1984 |
| 4406098 | Drilling ramp A drilling ramp for a mobile drilling rig of the type having a wheeled vehicle and a mast substructure, wherein the substructure includes four legs, two of which serve to mount power hydraulic jacks and two of which serve to mount leg locating sockets. Th... | 09/27/1983 |
| 4245441 | Telescoping aerial lift An aerial lift is described which has a pivotable boom with a load end and a pivot end. The boom is constructed such that, as the pivot end of the boom pivots upwardly, the load end is raised substantially vertically. In one embodiment, the boom is mounte... | 01/20/1981 |
| 4188757 | Telescoping aerial lift An aerial lift is described which has a pivotable boom with a load end and a pivot end. The boom is constructed such that, as the pivot end of the boom pivots upwardly, the load end is raised substantially vertically. In one embodiment, the boom is mounte... | 02/19/1980 |
| 4146998 | Position responsive valve for controlling the retraction rate of a lower boom in an articulated boom assembly In an articulated boom having a platform and comprised of upper and lower booms respectively, there are hydraulic actuators controlling the movements of the upper and lower booms. Control means are necessary in association with the lower boom to control i... | 04/03/1979 |
| 4084359 | Survey apparatus A survey system employs a ground-based extendible mast so that survey instruments, such as cameras, mounted at the top of the mast can attain heights comparable to those of low-level aerial photography. The mast is mounted on a base structure that houses ... | 04/18/1978 |
| 4070807 | Aerial lift An aerial lift including a pivotable boom with a pivot end that moves horizontally as the load end of the boom is raised and lowered, allowing the load end to move along a substantially vertical line. The boom is mounted on a vertically adjustable, substa... | 01/31/1978 |
| 4069637 | Tubular section boom A boom for an excavator or the like is constructed to have a generally L-shape when viewed in side elevation and have a circular cross section tapering downward from a maximum diameter at the apex of the boom to each end. The boom is made up of a central ... | 01/24/1978 |
