Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7373872 | Diaphragm pump A diaphragm pump (1) is provided with an annular working chamber (6) and an annular diaphragm (3), which is fixed on its outer peripheral region (12) and on its inner edge region (13). The inner and the outer diaphragm fixing point... | 05/20/2008 |
| 7284572 | Valve A plate valve, especially for diaphragm pumps, having a valve plate (8), a valve seat (15), and a valve chamber bounded by a valve housing is provided, with the valve plate being held at the edges thereof. The valve plate (8) is preset under ten... | 10/23/2007 |
| 7128541 | Oscillating displacement pump An oscillating displacement pump, particularly a diaphragm pump (P) for liquid or gaseous delivery media, having a delivery space which on the one side is delimited by a pump head and on the other side by a delivery element, particularly formed by a diaphragm (6 | 10/31/2006 |
| 7029250 | Pulsation damper A pulsation damper which is used for damping pressure variations in an oscillating positive-displacement pump connected thereto is provided. The pulsation damper includes an inlet connection element, an outlet connection element and a line connecting the elements wh... | 04/18/2006 |
| 6655257 | Diaphragm pump A diaphragm pump with a diaphragm (1) of elastic material, which includes a receiving cavity (4) in a reinforced central area (3) for a connecting rod head (5) of a connecting rod which displaces the diaphragm (1). The diaphragm (1) includes a clamping ri... | 12/02/2003 |
| 5971723 | Dosing pump A diaphragm dosing pump (1) has a rotary driving motor (3) electrically connected to control electronics (4). The motor is controlled in such a way that at the beginning and end of each dosing operation the driven diaphragm preferably always takes the sam... | 10/26/1999 |
| 5785508 | Pump with reduced clamping pressure effect on flap valve In a diaphragm pump flap valves accommodated in a pump head are provided which have a valve disk in which are situated valve flaps (14) circumscribed by partial ring-shaped recesses. These are respectively flexibly connected with the remaining valve disk ... | 07/28/1998 |
