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| Number | Title | Issue Date |
| 4580641 | Method and apparatus for starting diesel type hammers A self starting diesel hammer (20) having a tubular casing (30) inside which a heavy ram (32) is driven up by means of an explosion and then falls back onto an anvil (46) while compressing air under the ram so that fuel injected under the ram (32) causes ... | 04/08/1986 |
| 4480944 | Offshore drilling of large diameter holes in rock formations A drilling rig comprises a platform (10) supported above a sea surface (14) by legs which extend to the sea bottom (16). A drill guide (30) of rigid open framework construction extends down from the platform to the sea bottom. The drill guide is only mini... | 11/06/1984 |
| 4473123 | Diesel hammer capable of delivering uplift blows and method of using same A diesel hammer (20) is adapted to produce uplift blows by connecting its casing (30) via a pulling connection (52) to a case (24) to be pulled, removing vent plugs (76) from the top of the casing, sealing all other openings (78), (82), (94), in the casin... | 09/25/1984 |
| 4470468 | Offshore drilling of large diameter holes in rock formations A drilling rig comprises a platform (10) supported above a sea surface (14) by legs which extends to the sea bottom (16). A drill guide (30) of rigid open framework construction extends down from the platform to the sea bottom. The drill guide is only min... | 09/11/1984 |
| 4414918 | Distributor head for a pipe lining machine A distributor head for throwing mortar onto the wall of a pipe (12) being lined. A set of inner rotating vanes (56) throw the mortar onto an outwardly flared conical surface (40 ) and the mortar travels along the surface (40) to the outer vanes (48) on it... | 11/15/1983 |
| 4415045 | Offshore drilling of large diameter holes in rock formations A drilling rig comprises a platform (10) supported above a sea surface (14) by legs which extend to the sea bottom (16). A drill guide (30) of rigid open framework construction extends down from the platform to the sea bottom. The drill guide is only mini... | 11/15/1983 |
| 4384467 | Method of forming rings A method and apparatus for forming rings that is particularly suited for forming plow rings from elongated lengths of stock having irregular cross sectional shape. A length of stock (12) is positioned against a mandrel (20), the end of the stock being pre... | 05/24/1983 |
| 4351136 | Ground anchor installation A ground anchor for resisting uplift loads is installed by forming a hole in the earth with an enlargement at the bottom, placing an anchor plate in the bottom of the hole with projectable toggle arms extending out into the hole enlargement and with at le... | 09/28/1982 |
| 4351623 | Underwater storage of oil An offshore oil storage facility on a sea bed which can withstand the effects of waves, tides and oil transfer even though it is of lightweight steel construction. The oil in the tank floats on a layer of water and standpipes extend up from the water laye... | 09/28/1982 |
| 4329937 | Pipe lining apparatus This invention relates to apparatus for lining or coating the interior of lengths of large diameter, e.g. sixty inch (152.4 cm) pipe by applying fluent material thereto, and more specifically relates to such apparatus wherein a pipe liner vehicle travels ... | 05/18/1982 |
| 4273475 | Load supporting structure Soil having liquefaction potential in a load bearing region is stabilized by the placement of load supporting pile means in the region and the placement of water impervious means in the region, the water impervious means extending to a depth at least equa... | 06/16/1981 |
| 4268192 | Concrete wall construction A concrete water retaining wall is formed by driving a plurality of concrete cylinder piles into the earth in closely spaced relationship along a line. Thereafter, elongated tubular flexible bags are inserted down into the spaces between adjacent cylinder... | 05/19/1981 |
| 4252763 | Method and apparatus for cement lining of pipes A pipe lining apparatus includes a distributor head which throws cement mortar centrifugally against the interior of a pipe, a trowel which smooths the cement mortar and a liquid coating spray applicator which applies a curing control substance to the tro... | 02/24/1981 |
| 4238166 | Underwater driving of piles Piles are driven underwater by feeding them through spaced apart, aligned, tubular guides mounted on a structure to be anchored by the piles. When the piles reach the sea bed an elongated follower is fed down through the guide sleeves to the top of the pi... | 12/09/1980 |
| 4227831 | Self-contained offshore platform A self-contained jack up type drilling and production platform structure comprising a flotatable barge-like hull with support legs which can be jacked up and down to lower and raise the hull with respect to the surface of the sea. A removeable drilling mo... | 10/14/1980 |
| 4197033 | Method of installing a pipeline A pipeline is installed by forming a ground surface below the desired grade of the pipeline, holding a pipe length at the desired grade while injecting a hardenable fluid material into a bag positioned between the pipe length and the underlying ground sur... | 04/08/1980 |
| 4126191 | Gas discharge type underwater hammer with liquid purge and reflood control An underwater hammer, of the gas discharge type, is provided with a surrounding casing arranged in the nature of a diving bell from which liquid can be purged so that the hammer ram may move up and down with minimum resistance. A reflood tube extends down... | 11/21/1978 |
| 4124982 | Method of stabilizing soil in pile bearing regions Soil having liquefaction potential in a load bearing region is stabilized by the placement of load supporting pile means in the region and the placement of water impervious means in the region, the water impervious means extending to a depth at least equa... | 11/14/1978 |
| 4102143 | Anchoring of structures Anchoring arrangements for structures such as offshore towers. Wedges which fit down into spaces defined by downwardly converging surfaces fixed to the structure and to an anchor member, respectively, are held in frictional locking engagement by means of ... | 07/25/1978 |
| 4098355 | Underwater hammer with circumferential flow seal An underwater hammer, of the gas discharge type, is provided with a circumferential control valve on the hammer ram to allow free flow of water and gas upwardly along the ram in the annular clearance between the ram and a tubular sleeve in which it is gui... | 07/04/1978 |
| 4060139 | Underwater gas discharge hammer with gas reservoir An underwater gas discharge type hammer is provided with a gas reservoir into which expended ram driving gas exhausts to avoid aeration of incoming water which surrounds the gas discharge device of the hammer. The gas resevoir is also arranged as a diving... | 11/29/1977 |
| 4058175 | Method for operating pile driver Method and apparatus for forming piles in the earth with a pile hammer rig having a hoisting drum carried by a crane, driving and braking apparatus for the drum, a drop-weight, a hoisting rope leading from the drum for lifting the drop-weight, apparatus f... | 11/15/1977 |
| 4031687 | Formation of elevated structures Techniques are described for forming an elevated concrete slab-like supporting platform. A sand blanket is installed on the platform site and supporting piles are driven down through the sand blanket. A concrete slat is poured over the sand blanket and a ... | 06/28/1977 |
| 4026193 | Hydraulically driven hammer system A hydraulic pile driving hammer system is described which requires only a single pressure operated pilot to obtain switching for reversal of hydraulic forces at both ends of its stroke.... | 05/31/1977 |
| 4020744 | Control of hydraulically powered equipment A hydraulically driven hammer is disclosed, along with valve actuation arrangements which operate to switch hydraulic forces on the hammer ram after preselected intervals following application of pressurized pilot fluid flows. These flows pass into a flui... | 05/03/1977 |
| 4012917 | Bridge beam tower erection methods and apparatus A platform is raised from water level up to the tops of prepositioned template legs by means of jacking units comprising jacking mechanisms and jacking legs mounted near the upper ends of the template legs. Bridge beams of open framework construction span... | 03/22/1977 |
| 4002211 | Cable operated apparatus for forming piles Method and apparatus for forming piles in the earth with a pile hammer rig having a hoisting drum carried by a crane, driving and braking apparatus for the drum, a drop-weight, a hoisting rope leading from the drum for lifting the drop-weight, apparatus f... | 01/11/1977 |
| 4002038 | Method and apparatus for rapid erection of offshore towers A platform is raised from water level up to the tops of prepositioned template legs by means of jacking units comprising jacking mechanisms and jacking legs mounted near the upper ends of the template legs and extending down to the platform. Bridge beams ... | 01/11/1977 |
| 3971227 | Installation of expanded base piles A massive precast pile tip is provided with a tubular sleeve which extends into the tip to tightly encircle a core of the tip mandrel. The sleeve strengthens the tip material in the core region to improve its driving strength. A mandrel fits into the slee... | 07/27/1976 |
| 3955594 | Pressure operated valve systems Fluid flow through a conduit is controlled by varying the pressure of the fluid. The fluid passes through a normally closed valve comprising a flexible sleeve held in pinched closed condition by an elastic material which is isolated from all pressures exc... | 05/11/1976 |
| 3931778 | Support barge method and apparatus A machinery supporting arrangement suitable for use in maintenance and repair of dam walls comprising a barge with a liftable platform for carrying the machinery. The platform extends out over the top of a dam wall when the barge is moored alongside it so... | 01/13/1976 |
