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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 6926026 | Siphon initiating device A siphon initiating device is provided having a cylinder member and slideably interactive hollow piston member, both members equipped with check valves to permit unidirectional flow. Both extremities of the device have threaded fittings for engaging garden hoses. By... | 08/09/2005 |
| 5558762 | Portable water filter and valve assembly A water filter including an inlet assembly which comprises a prefiltering foam tip. The inlet hose includes an adjustable float and a weight on the end of the hose which allows a given length at the end of the inlet hose to extend below the surface of the... | 09/24/1996 |
| 4574828 | Hand held and hand operated pumping and siphoning device A hand held and hand operated device is capable of pumping or siphoning a liquid. The device includes a pair of telescoping hollow tubes having a single longitudinal axis with a seal therebetween that is maintained when one of the tubes is reciprocated re... | 03/11/1986 |
| 4301826 | Combination siphon and positive action pump A combination vacuum lift pump and siphon for handling liquids, comprising a pump cylinder having an inlet disposed near one end and an outlet adjacent to but spaced from the other end, a piston reciprocatable in the cylinder, and a plunger and handle con... | 11/24/1981 |
| 4290443 | Flexible tube liquid transfer device A flexible tube liquid transfer device is provided, formed of three concentric flexible tubes to be used as a siphon. A coupling bush connects the inlet ends of the innermost and outermost tubes, sealing the outermost tube to permit liquid to flow into th... | 09/22/1981 |
| 3958589 | Siphon A simply constructed and inexpensive syphon for rapidly lifting liquid out of a container, the syphon consisting of a flexible plastic tube in which there is a spongy plastic piston attached to a flexible cord which extends out of one end of the tube so i... | 05/25/1976 |
