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Battery powered vacuum unit

  • US 4,863,593 A
  • Filed: 02/04/1988
  • Issued: 09/05/1989
  • Est. Priority Date: 10/29/1985
  • Status: Expired due to Fees
First Claim
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1. A portable vacuum unit for use in field filtrations, and unit comprising:

  • (a) a housing having therein a generally upright piston pump and a direct current electric motor for driving said pump, said pump including a cylinder having a reciprocable piston therein, an inlet port for air under reduced pressure and an outlet port for exhausting air to the atmosphere;

    (b) a tubular connection extending through a wall of said housing for attachment of a suction line;

    (c) a vacuum line extending from said tubular connection to said inlet port of said piston pump, said vacuum line including a water trap;

    (d) means for introducing a lubricant into said cylinder without removal of any wall of said housing;

    (e) means for allowing automatic intermittent operation of said motor during operation of said vacuum unit; and

    (f) means for maintaining full time suction in said vacuum unit during said intermittent operation of said motor.

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