Clean room helmet system

• US 5,046,492 A
• Filed: 07/15/1988
• Issued: 09/10/1991
• Est. Priority Date: 07/15/1988
• Status: Expired due to Term

• Current Assignee: Bird Products Corporation (Becton, Dickinson & Co)
• Original Assignee: Stack Holdings Incorporated
• Inventors: Williamson, Ian M., Stackhouse, Wyman H.
• Primary Examiner(s): Burr, Edgar S.
• Assistant Examiner(s): Asher, Kimberly L.
• Application Number:
  US07/219,220
• Time in Patent Office: 1,152 Days
• Field of Search: 128/205.19, 128/205.27, 128/201.24, 128/201.25, 128/201.29, 128/200.27, 128/200.28
• US Class Current: 128/200.27
• CPC Class Codes: A41D 13/1153 with a hood
• CPC Class Codes: A41D 13/1184 with protection for the eyes, e.g. using shield or visor
• CPC Class Codes: A42B 3/286 with forced flow, e.g. by a fan
• CPC Class Codes: A62B 18/04 Gas helmets

Abstract

There is described an improved clean room helmet system including a helmet having an inlet port and an exhaust port. Connected to the inlet port is a portable and mobile pressure filtering system for suppling filtered air to the helmet. A separate portable and mobile vacuum filtering system is connected to the outlet port on the helmet for exhausting and filtering all air removed from the interior of said helmet before exhausting the air into the atmosphere. All air fed to the helmet is filtered and all air exhausted from the helmet is filtered thereby protecting the user from breathing contaminated air. The system also protects those persons in the environment from air being exhausted from the helmet into the environment. A deflector located within the helmet prevents pressurized air entering the inlet port from being fed directly to the exhaust port located on the helmet.

Claims

1. A Clean Room Helmet System for substantially isolating a person from the environment and the environment from the person comprising:

a helmet for covering the head portion of a user,

said helmet having a solid translucent face plate and an inlet port and an exhaust port for allowing intake air to enter the helmet and exhaust air to leave the helmet respectively.

a portable and mobile pressure filtering system adapted to be carried on the person of the user and connected to said inlet port on said helmet for supplying filtered air to said helmet,

said pressure filtering system consisting of an electric motor, battery pack and filtering element connected in circuit to filter all air supplied to said helmet,

a portable and mobile vacuum filtering system adapted to be carried on the person of the user and connected to said outlet port on said helmet for exhausting and filtering all air removed from the interior of said helmet portion,

said vacuum filtering system consisting of an electric motor, battery pack and filtering element connected in circuit to filter all air removed from said helmet, and

an air deflector located in said helmet between said inlet port and said outlet port for deflecting the filtered incoming air from the inlet port into the vicinity of the user'"'"'s nose portion whereby optimum breathing efficiency is obtained before the air is exhausted out the exhaust port,

and in which said helmet includes a chin portion and said deflector fits inside said chin portion between said inlet port and said exhaust port and is attached to said helmet with double faced adhesive tape.