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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 7309926 | Solar-powered pumping device A solar-powered pumping device comprising: a solar power converter for generating power from sunlight; a pump driven by power from said solar power converter; an actuator for controlling the orient... | 12/18/2007 |
| 6220837 | Progressing cavity pump having a ratio of eccentricity, rotor diameter and stator lead A progressing cavity pump adapted for use in pumping liquid/solid mixtures with a solid content of about 50% has a single start helical rotor and a two start helical stator bore. The ratio of the eccentricity of the rotor to its minor diameter is about 1:... | 04/24/2001 |
| 5924929 | Flexible drive shaft and drive shaft and rotor assembly A flexible drive shaft for connection to the rotor of a progressive cavity pump or motor, in which the drive shaft 7, provided with a coating 26, is formed of titanium or similar metal. A relatively inexpensive metal flanged head portion is fastened, e.g.... | 07/20/1999 |
| 5474432 | Progressive cavity pump or motors A stator assembly for a progressive pump or motor, comprising a resilient material stator (10) having a helical bore (12) therethrough, the cylindrical outer surface (14) of the stator having a plurality of axially extending circumferentially spaced outwa... | 12/12/1995 |
| 5411383 | Rotor and flexible drive shaft assembly A rotor and flexible drive shaft assembly for a progressive cavity pump or motor in which the rotor 10 is provided with an end portion 12 and the drive shaft 20 is provided with a head portion 18. A transverse spirally wound sheet metal pin 24 is engaged ... | 05/02/1995 |
| 5407337 | Helical gear fluid machine A helical gear fluid machine comprises an inner rotary element (14) and an outer rotary element (15) and a casing (12), the rotary elements being mounted within the casing for rotation about mutually spaced fixed axes (17,16), The casing forms stationary ... | 04/18/1995 |
| 4379561 | Well packer A well packer, in particular for a bore hole pump, comprises a packer sleeve having a tapered external surface surrounded by a collet ring which has a tapered internal surface. The collet ring is of resilient material and can be stressed to a smaller diam... | 04/12/1983 |
| 4247156 | Shaft bearing A shaft bearing for locating a shaft within a tubular member, the bearing comprising a tubular central portion with an axial bore to receive the shaft. A plurality of arms extend outwardly from the tubular central portion in pairs, the arms all extending ... | 01/27/1981 |
