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Lubricating device for transmissions or the like in starting condition

  • US 4,169,519 A
  • Filed: 02/24/1978
  • Issued: 10/02/1979
  • Est. Priority Date: 04/07/1977
  • Status: Expired due to Term
First Claim
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1. A lubricating device for lubricating gears in a transmission housing during an initial starting condition phase of operation thereof, said lubricating device comprising:

  • a storage tank housing lubricant therein;

    an oil pump having an inlet port and an outlet port, said inlet port being connected in fluid circuit with said storage tank;

    a normally closed pressure responsive valve having control means responsive to a fluid pressure from said pump above a predetermined threshold value to effect an opening of said valve, said control means being connected in fluid circuit with said outlet port;

    sump means in said transmission housing;

    a first overflow pipe connecting said sump means to said storage tank and including first means establishing an upper lubricant level into which at least one gear is rotated;

    a second overflow pipe connecting said sump means to said storage tank and including second means establishing a lower lubricant level below the level of said one gear;

    third means connecting said outlet port to a further location adjacent said one gear in said transmission housing, said pump effecting a pumping of said lubricant from said storage tank into said transmission housing to effect a pressurized spray of lubricant onto said one gear; and

    said pressure responsive valve being connected in line of said second overflow pipe, said valve becoming opened in response to a fluid pressure from said outlet port of said pump attaining and exceeding said predetermined threshold value to effect a connection between said sump and said storage tank to cause a lowering of the level of lubricant in said transmission housing to said lower lubricant level.

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