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A haircutting appliance comprises an enclosed housing having a hollow handle connecting the housing to a vacuum source to carry away cut hairs from a subject's head.
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| Number | Title | Issue Date |
| 7137792 | Piston pump for high viscous materials In a piston pump (1) having a differential piston (12) positioned in a cylindrical housing (11) and translationally drivable, a first pressure chamber (13) of the differential piston (12) is connectable to a second pressure chamber... | 11/21/2006 |
| 6935850 | Axially aligned dual piston cylinder air pump with a common head portion A dual-direction pump includes two cylinders arranged on opposite sides of a head portion and an inlet return-flow prevention device and a leakproof device mounted between the cylinder and the head portion for avoiding leakage at the juncture between the cylinder an... | 08/30/2005 |
| 6695595 | Pump for pumping at two pressures A pump includes a cylinder, a piston assembly, a first nozzle, a valve, a controller, a ring and a second nozzle. The cylinder defines first and second chambers and first and second channels for communication between the chambers. The piston assembly is r... | 02/24/2004 |
| 5997256 | Dual stage, dual mode air pump The dual stage, dual mode air pump is selectively operable in a low pressure, high volume mode or a high pressure, low volume mode. It includes a pump head, an outer tube that is engaged to the pump head, an inner tube that is engaged to the pump head and... | 12/07/1999 |
| 5832727 | Hydraulic oil well pump drive system A hydraulic oil well pump drive system for driving an oil well sucker rod includes a master piston positioned within a master cylinder for axial displacement between first and second ends of the master cylinder. The master piston has a piston drive rod wh... | 11/10/1998 |
| 5423662 | Precision metered multiple fluid pumping system A precision metering, multiple fluid pumping system comprised of a main pump for pumping a primary fluid and an auxiliary pump for pumping a secondary fluid adjustably linked to work in unison with the main pump. The auxiliary pump is linked to the main p... | 06/13/1995 |
| 4775301 | Oscillating electromagnetic pump with one-way diaphragm valves An oscillatory pump includes a cylinder (9) having normally-closed valves (10,13) of flexible material fixedly located at the inlet (Ac) and outlet (Bc) ends of the cylinder (9), and a piston (1) having an inlet (Ap) and a... | 10/04/1988 |
