Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7367366 | Pumping device A pumping device includes a container having a cover structure. A piston is movably received in the container and is manually operable. The cover structure has an air inlet valve and a slide switch, which, when properly set, allow air to be sucked into or expelled o... | 05/06/2008 |
| 7171995 | Fuel-recovery system and method A fuel-recovery system for removing fuel from a fuel tank having a filler neck and a rollover valve is disclosed. A fuel-recovery line has one or more holes in its outside wall and a tapered plug in its inlet end. The fuel-recovery line also has a bend in its inlet ... | 02/06/2007 |
| 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 |
| 6883535 | Liquid handling apparatus The present invention is an apparatus for the transfer of fluid or fuel, from a reservoir to a container, which may be a tank from which the liquid will be used or a tank in which the liquid will be temporarily stored. The apparatus includes a compliant base element... | 04/26/2005 |
| 6256801 | Siphon assemblies A siphon assembly for a flushing cistern, said assembly including an inverted generally U shaped duct having an up leg and a down leg the up leg being provided with an enlarged chamber having a lower end open to the interior of the cistern in use and the ... | 07/10/2001 |
| 6161568 | Water supply pipe protector A decorative pipe protector that can be positioned around a copper water supply pipe to both provide a decorative appearance and protect the copper water supply pipe from corrosion. The pipe protector includes a trim tube extending axially between a first... | 12/19/2000 |
| 6112759 | Oil drawing and dispensing device A drawing and dispensing device includes a container for receiving a liquid and having an opening coupled to a pipe for drawing a liquid into the container. A check valve is attached to the port. A pump device is attached to the check valve for pumping th... | 09/05/2000 |
| 5620309 | Fluid pump priming system An apparatus for priming a non self-priming fluid pump or siphon device includes three components: an outlet valve, priming pump and inlet check valve. All three components are integrated into the casting of the fluid pump or are attached separately to an... | 04/15/1997 |
| 5433246 | Pressure coupling for cleaning water lines A pressure coupling for facilitating connection of an air pump with a water faucet to expel water from water lines connected with the faucet by operation of the air pump. In a preferred embodiment the pressure coupling includes a valve stem threadably sea... | 07/18/1995 |
| 4649953 | Siphon assembly for flushing cisterns Siphon assembly for a flushing cistern is in two parts; the first including the down leg of the siphon duct the lower end of which is mounted in the cistern base and the second including the up leg and the inlet chamber in which the flushing piston is rec... | 03/17/1987 |
| 4232694 | Siphon A siphon is formed of a long transparent main siphon tube having a distal end for insertion in a tank from which fluid is to be siphoned and having a proximal end. A smaller diameter transparent connection tube fits tightly within the main siphon tube at ... | 11/11/1980 |
| 4112963 | Siphon tube starter A siphon tube starter comprising a cylinder and piston, the base of the cylinder having a tubular inlet extension to which is fastened a soft flexible cone for abutting the end of a siphon tube. Retraction of the piston creates a negative pressure in the ... | 09/12/1978 |
| 4041971 | Siphon starting device A siphon includes an inverted U-shaped tube providing a passage between a main and an auxiliary container of water. A longer leg of the tube is connected to the upper end of a first section of an enclosed chamber which extends deeply into the main contain... | 08/16/1977 |
