| US 7,500,542 B2 | ||
| System for lubricating and cooling a mechanical assembly | ||
| Pierre Maret, Lambesc (France); and André Baixas, Vitrolles (France) | ||
| Assigned to Eurocopter, Marignane (France) | ||
| Filed on Aug. 11, 2004, as Appl. No. 10/915,475. | ||
| Application 10/915475 is a division of application No. 10/170405, filed on Jun. 14, 2002, granted, now 6,817,448. | ||
| Claims priority of application No. 01 07845 (FR), filed on Jun. 15, 2001. | ||
| Prior Publication US 2005/0056490 A1, Mar. 17, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. F01M 1/08 (2006.01) | ||
| U.S. Cl. 184—6.26 [74/606 A; 184/6.4] | 8 Claims |
| 1. A system for lubricating and cooling a mechanical assembly, said system comprising:
a main lubricating and cooling device circulating a stream of lubricating and cooling liquid through said mechanical assembly
at a relatively high pressure; and
an auxiliary backup lubricating and cooling device set in operation automatically or manually in response to a condition that
said main device becomes defective, said backup device comprising:
a first path comprising at least one reservoir of lubricating and cooling liquid that operates to feed said lubricating and
cooling liquid provided under pressure;
a second path comprising at least one source of pressurized gas that operates to output pressurized gas from said source;
a feed mechanism that receives said lubricating and cooling liquid provided by said first path and said pressurized gas provided
by said second path and outputs said pressurized gas and liquid;
at least a first spray nozzle and a second spray nozzle that each receive said pressurized gas and liquid output from said
feed mechanism, for spraying said pressurized gas and liquid onto said mechanical assembly; and
said first path further comprising a pressure and flow limiter arranged between said reservoir and said first and second spray
nozzles, and wherein:
said first and second spray nozzles are fed with the lubricating and cooling liquid from said reservoir at a pressure at most
equal to 2 bar (2·105 pascal).
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