| US 7,544,046 B2 | ||
| Vacuum pump | ||
| Christian Beyer, Köln (Germany); Christian Harig, Köln (Germany); Rainer Hölzer, Hürth (Germany); Alois Greven, Erkelenz (Germany); and Hermann Boy, Kerpen (Germany) | ||
| Assigned to Oerlikon Leybold Vacuum GmbH, Cologne (Germany) | ||
| Appl. No. 10/512,026 PCT Filed Apr. 15, 2003, PCT No. PCT/EP03/03891 § 371(c)(1), (2), (4) Date Oct. 19, 2004, PCT Pub. No. WO03/089791, PCT Pub. Date Oct. 30, 2003. |
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| Claims priority of application No. 202 06 267 U (DE), filed on Apr. 20, 2002. | ||
| Prior Publication US 2005/0129535 A1, Jun. 16, 2005 | ||
| Int. Cl. F04B 53/00 (2006.01) | ||
| U.S. Cl. 417—234 [417/2; 417/313] | 11 Claims |
| 1. A vacuum pump comprising:
a pump unit with a vacuum pumping set,
an operating unit connected with the pump unit for controlling the pump unit and arranged spaced from the pump unit, and
transceiver modules in the pump unit and the operating unit, respectively, for transmitting and receiving control and operational
data bidirectionally in a wireless manner, the pump unit and the operating unit being exclusively connected with each other
in a wireless manner,
wherein the pump unit comprises:
a pump control and a supervisory module for continuous supervision of the transceiver module even if no control or operational
data at all are exchanged between the pump unit and the operating unit,
the supervisory module regularly inducing the transceiver module at intervals of a few seconds at maximum to emit a presence
signal,
the pump control switching the pumping set to a safety mode when the supervisory module signals an interruption of the reception
of a control signal continuously transmitted by the transceiver module of the operating unit.
|