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Harry Franklin Vickers (October 1, 1898 – January 12, 1977) was an American inventor and industrialist. He grew up in Montana and southern California . He was called the "Father of Industrial Hydraulics" by the American Society of Mechanical Engineers, who gave him the Society's highest award, the ASME Medal, in 1956.
Fluid flow in an external gear pump. A hydraulic pump is a mechanical source of power that converts mechanical power into hydraulic energy (hydrostatic energy i.e. flow, pressure). Hydraulic pumps are used in hydraulic drive systems and can be hydrostatic or hydrodynamic. They generate flow with enough power to overcome pressure induced by a ...
Calligra Sheets uses ODS as default file format. Collabora Office Calc for Mobile and Desktop apps uses ODS as its native file format. Collabora Online Calc uses ODS as its native file format. EditGrid, a web-based (online) spreadsheet service – full support. [41] FileApp allows viewing OpenDocument files on iPhone and iPad. [5]
According to the OpenDocument 1.0 specification, the ZIP file specification is defined in Info-ZIP Application Note 970311, 1997. [14] [15] The simple compression mechanism used for a package normally makes OpenDocument files significantly smaller than equivalent Microsoft ".doc" or ".ppt" files. This smaller size is important for organizations ...
An eccentric rotary vane pump Another eccentric rotary-vane pump design. Note that modern pumps have an area contact between rotor and stator (and not a line contact). 1. pump housing 2. rotor 3. vanes 4. spring. A rotary vane pump is a type of positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In ...
A servo valve receives pressurized hydraulic fluid from a source, typically a hydraulic pump. It then transfers the fluid to a hydraulic cylinder in a closely controlled manner. Typically, the valve will move the spool proportionnaly to an electrical signal that it receives, indirectly controlling flow rate.
A fluid power system has a pump driven by a prime mover (such as an electric motor or internal combustion engine) that converts mechanical energy into fluid energy, Pressurized fluid is controlled and directed by valves into an actuator device such as a hydraulic cylinder or pneumatic cylinder, to provide linear motion, or a hydraulic motor or pneumatic motor, to provide rotary motion or torque.
A variety of hardness-testing methods are available, including the Vickers, Brinell, Rockwell, Meyer and Leeb tests. Although it is impossible in many cases to give an exact conversion, it is possible to give an approximate material-specific comparison table for steels.