Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 4021149 | Fluid driven reciprocating pump A fluid driven reciprocating pump is described, particularly for use in feeding fertilizer solution to an irrigating water line, the pump being driven solely by the pressurized water in the supply line and requiring no electricity or other power source fo... | 05/03/1977 |
| 4008984 | Pump apparatus Flexible diaphragms mounted on the ends of a shaft contact a liquid to be dispensed (e.g., syrup bases). A chamber is located about the shaft side of each diaphragm, which chamber is in communication via shaft passages with outlets in the shaft wall. A va... | 02/22/1977 |
| 3972654 | Diaphragm pump boiler feed water system A hydraulic fluid control system regulates the delivery rate of feed water to a boiler. A hydraulic actuated diaphragm pump having a plurality of diaphragm working chambers which are interconnected with check valve controlled inlets and outlets pumps the ... | 08/03/1976 |
| 3967917 | Process and equipment for lifting secondary liquids with the energy of primary liquids One liquid is pumped to a higher elevation by another liquid. In a first stage, the pumping liquid is withdrawn from a chamber and the liquid to be pumped is thereby raised and drawn into the chamber by a siphon effect. In a second stage, the pumped liqui... | 07/06/1976 |
| 3963377 | Pneumatically powered pump system Disclosed is a pumping system using a pneumatically powered, submerged pump for lifting high viscosity oil from a well. The pump includes a flexible, bag-shaped expansible member or "bladder" mounted within a surrounding housing. Pressurized gas is suppli... | 06/15/1976 |
| 3957401 | Fluid pump assembly The pump assembly comprises means defining a fluid retention chamber having an inlet opening and an outlet opening therein, and check valve means adjacent the inlet and outlet openings, which are operative to limit the fluid flow therethrough to relativel... | 05/18/1976 |
| 3955901 | Membrane pump An air pressure-operated membrane pump for pumping a liquid comprises a housing including a chamber which is divided into liquid and air compartments by a floppy flexible membrane extending across it. The air compartment has an air inlet and outlet connec... | 05/11/1976 |
| 3932066 | Breathing gas delivery cylinder for respirators A cylinder for delivering at limited positive pressure a preselected limited volume of breathing gas at a preselected limited flow rate. The cylinder includes a cylindrical housing which is substantially closed to the atmosphere. A drive weight is movably... | 01/13/1976 |
