Installation for disinfecting, by the action of formaldehyde

• US 4,119,400 A
• Filed: 02/11/1977
• Issued: 10/10/1978
• Est. Priority Date: 12/16/1975
• Status: Expired due to Term

• Current Assignee: Societe Detec SA
• Original Assignee: Societe Detec SA
• Inventors: Kurz, Maurice
• Primary Examiner(s): Wolk, Morris O.
• Assistant Examiner(s): Garris, Bradley
• Application Number:
  US05/767,992
• Time in Patent Office: 606 Days
• Field of Search: 21/DIG. 4, 21/58, 21/91-93, 21/110
• US Class Current: 422/298
• CPC Class Codes: A61L 2/204 Formaldehyde

Abstract

Apparatus for disinfecting medical apparatus, and especially artificial respirators, by the action of formaldehyde fumes subsequently neutralized by ammonia fumes, the apparatus being adapted to avoid the deposition of crystalline hexamethylene tetramine inside the respirator and comprising an enclosure for receiving the medical apparatus, a source of formaldehyde fumes likely to spread within the enclosure, and an auxiliary neutralization chamber communicating with the enclosure and provided with a source of ammonia; the volume of the neutralization chamber being such as to allow ammonia fumes to spread and to come into contact with formaldehyde fumes for a sufficient time to ensure neutralization.

Claims

1. Apparatus for disinfecting medical apparatus and especially artificial respirators by the action of formaldehyde fumes subsequently neutralized by ammonia fumes and adapted to avoid the deposit of crystalline hexamethylene tetramine inside the medical apparatus, said disinfecting apparatus comprising:

a disinfection enclosure adapted to receive a medical apparatus and provided with at least one hermetically closed door through which the medical apparatus is inserted and subsequently removed;

means for introducing formaldehyde fumes into said enclosure;

air inlet means for introducing air into said enclosure;

a source of heat for raising the temperature of the air to a predetermined value;

a decontamination compartment having a UV source for decontaminating the air introduced into said enclosure;

pump means for conveying the air from outside of said enclosure successively to said decontamination compartment to said source of heat and to said disinfecting enclosure;

an auxiliary neutralization chamber communicating with said disinfecting enclosure and provided with a souce of ammonia fumes, the volume of said neutralization chamber being such as to allow said ammonia fumes to spread and to come into contact with formaldehyde fumes for a sufficient time to ensure neutralization thereof;

pump means connected to said disinfection enclosure and to said neutralization chamber and adapted to withdraw the formaldehyde fumes from said disinfection enclosure and deliver them to said neutralization chamber; and

a non-return valve allowing the formaldehyde fumes to be conveyed to said neutralization chamber and precluding the reverse movement thereof from said neutralization chamber to said disinfection enclosure.

2. The appartus of claim 1 wherein said air inlet means is provided with an electrovalve.

3. The apparatus of claim 1, wherein said neutralization chamber comprises baffles adapted to slow down and extend the path of the ammonia fumes and the formaldehyde fumes in said neutralization chamber by multiplying the contacts between the ammonia and formaldehyde and by ensuring a complete neutralization of the formaldehyde by the ammonia.

4. The apparatus of claim 1, wherein said disinfection enclosure comprises female socket means inside said enclosure and adapted to connect the medical apparatus so as to allow electrical actuation thereof and circulation of formaldehyde fumes inside said medical apparatus.