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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7240739 | Well fluid control A well conduit that has an aperture for communicating with a target reservoir and a one-way valve in the aperture may be used in injection and production wells. Other devices, systems, methods, and associated uses are also included in the present invention. For exam... | 07/10/2007 |
| 6048175 | Multi-well computerized control of fluid pumping A system for controlling one or more borehole pumps to enable pumping-on-demand is described. The system uses a computerized controller which, in combination with sensors, monitors and controls the activity of the pump, thereby controlling fluid in the bo... | 04/11/2000 |
| 6036446 | Fluid transfer with concurrent system movement for liquid and vacuum A portable system of inter-connected smaller and larger canisters for near simultaneous vacuum and liquid transfer free from any external power. Captured vacuum in the canisters is employed for waste liquid extraction and a subsequent pressure transfer ma... | 03/14/2000 |
| 5806598 | Apparatus and method for removing fluids from underground wells An apparatus for supplying and venting gas to a downhole accumulation chamber that includes a supply valve having an open supply position to supply gas to the chamber and a closed supply position, a vent valve having an open vent position to vent gas from... | 09/15/1998 |
| 5671813 | Method and apparatus for intermittent production of oil with a mechanical interface Two production strings extend downwardly from a well head of an oil well to a point adjacent a producing region. Lower ends of the two production strings are connected by a coupling which allows a mechanical interface launched adjacent the well head of on... | 09/30/1997 |
| 5487647 | Pneumatically powered submersible fluids pump with casing activator and biasing means A pump, submerged in a fluid in a pump or well, has a buoyant outer, enclosing casing. Communicated to the casing are a conduit to supplying compressed air to the casing, a conduit for carrying the exhausted air away from the casing, an inlet and check va... | 01/30/1996 |
| 5470206 | Pneumatically powered submersible fluids pump with casing activator A pump, submerged in a fluid in a pump or well, has a buoyant outer, enclosing casing. Communicated to the casing are a conduit to supplying compressed air to the casing, a conduit for carrying the exhausted air away from the casing, an inlet and check va... | 11/28/1995 |
| 5451144 | Air-operated pump An air-operated pump includes a pair of poppet valves affixed to a vertical valve shaft and arranged so that the upper valve is closed when the lower valve is open, and vice versa. When a connected displacer is immersed in tank fluid, its buoyancy in comb... | 09/19/1995 |
| 5405247 | Pre-charged vacuum fluid charge/disposal apparatus An apparatus and method of use thereof includes a rechargeable, pre-charged vacuum canister used to remove viscous fluids, e.g., waste oil, from containers such as engine crankcases through an opening, such as a dipstick tube. The self-contained canister ... | 04/11/1995 |
| 5242273 | Method and apparatus for internal combustion engine coolant extractor/injector An automobile coolant extractor/injector comprises a tank assembly, an air pressure control assembly and a hose assembly. The air pressure control assembly creates a vacuum in the tank assembly by using the venturi effect. The air pressure control assembl... | 09/07/1993 |
| 5074758 | Slurry pump A pump for liquid or slurry is valve controlled to fill a pumping chamber to an upper predetermined level; valve controlled to supply gas under pressure to the top of the liquid to force it out a lower outlet port down to a lower predetermined level and t... | 12/24/1991 |
| 4990061 | Fluid controlled gas lift pump A well pumping system uses a closed gas cycle to periodically unload a pumping chamber in a well. The system includes a tubing string having a downhole pumping chamber providing a check valve at the lower end. A packing assembly defines the upper end of t... | 02/05/1991 |
| 4901798 | Apparatus and method for removal of accumulated liquids in hydrocarbon producing wells A method and apparatus are disclosed to detect periodic well loading by produced accumulated secondary fluids, and accordingly to remove the undesired secondary fluid from the tubing of a hydrocarbon producing well. The method according to the present inv... | 02/20/1990 |
| 4818187 | Fluid exchange pump A fluid pump which uses a motive fluid for pumping liquid or gaseous fluids by use of a fluid inlet, a fluid exchange chamber, and a fluid exhaust means operates as follows: A fluid which is to be pumped is introduced into a fluid exchange chamber. The ex... | 04/04/1989 |
| 4625807 | Method and apparatus for recovery of water-immiscible liquids from water-bearing formations Ground water pollutant floating above the water table in a water-bearing formation is removed through a well penetrating the formation by lowering the water level so that pollutant from the region surrounding the well will flow into the well due to gravit... | 12/02/1986 |
| 4427345 | Artificial lifting device and method An artificial lifting device has a downhole valve which intermittently directs operating gas to the top of a collection chamber to promote the lifting of oil below the valve upwardly through an annulus defined between a cylindrical housing supporting the ... | 01/24/1984 |
| 4323452 | Pumpless flow system for a corrosive liquid A system for transporting a highly corrosive liquid solely by pressure differential without the need of mechanical pumps for transporting the corrosive liquid. The system includes a source of gas under pressure (78,82) and first and second corrosive liqui... | 04/06/1982 |
| 4021147 | Gas pressure driven pump The invention is concerned with an improvement in a gas pressure driven pump which comprises a vessel, means for introducing a liquid into the vessel, means for preventing reverse flow of the liquid into the liquid introducing means, means for introducing... | 05/03/1977 |
| 3930755 | Air-pressure actuated slurry pump A slurry pump including a pressure tank with an inlet and a lower outlet and having a pneumatically operated, inwardly opening closure at the inlet and a hinged, outwardly opening door at the outlet swingable between opened and closed positions. An extern... | 01/06/1976 |
