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Twin air pump

  • US 4,170,439 A
  • Filed: 01/05/1978
  • Issued: 10/09/1979
  • Est. Priority Date: 01/05/1978
  • Status: Expired due to Term
First Claim
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1. An electromagnetic air pump comprising a valve body having two outlet pipes and four valve chambers each provided with a check valve, and a pair of pump chambers each provided with a pump diaphragm, wherein the first valve chamber communicates with the atmosphere and the first pump chamber, whereby the check valve thereof allows air to flow only from the atmosphere to the first pump chamber, and said first pump chamber communicates with the third valve chamber which communicates with the first outlet pipe, whereby the check valve of said third valve chamber allows air to flow only from the first pump chamber to the first outlet pipe;

  • the second valve chamber communicates with the atmosphere and the second pump chamber, whereby the check valve thereof allows air to flow only from the atmosphere to the second pump chamber, and said second pump chamber communicates with the fourth valve chamber which communicates with the second outlet pipe, whereby the check valve of said fourth valve chamber allows air to flow only from the second pump chamber to the second outlet pipe; and

    the pump further comprising drive means for pulsating said pump diaphragms, the drive means comprising an electromagnet and a pair of arms which are vibrated symmetrically in accordance with the alternation of the magnetic field of the electromagnet and are connected to the diaphragms respectively.

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