United States Patent m
Green et al.
 AIR FILTRATION AND CONTROL SYSTEM INCLUDING HEAD GEAR
 Inventors: Lawrence J. Green, Hungtinton Beach;
Harry Nicholas Herbert, San Juan
Capistrano, both of Calif.
 Assignee: Bio-Medical Devices, Inc., Irvine,
 Appl. No.: 539,708
 Filed: Oct 5,1995
 Int CI.6 A42B3/00
 U.S. CI 2/171.3; 2/424
 Field of Search 2/171.3, 422, 424.
2/436. 202. 205. 206; 128/201.15. 201.22, 201.23, 201.24, 201.25, 206.19
 References Cited
U.S. PATENT DOCUMENTS
1,184,785 5/1916 Stem 128/201.15
3,963,021 6/1976 Bancroft 2/171.3
4,127,130 11/1978 Naysmith 128/201.25
4,619254 10/1986 Morettietal 128/201.23
4,730,612 3/1988 Dampney 2/171.3
5,022,900 671991 Bar-Yona et al 128/201.25
5,054,480 10/1991 Bareetal 128/201.25
5,104,430 4/1992 Her-Mou 2/171.3
5,125,402 6/1992 Greenough 128/201.25
5,245,994 9/1993 Chang et al 2/171.3
FOREIGN PATENT DOCUMENTS
2220574 1/1990 United Kingdom 128/201.22
[li] Patent Number: 5,711,033
 Date of Patent: Jan. 27, 1998
Primary Examiner—Michael A. Neas
Attorney, Agent, or Firm—G. Donald Weber, Jr.
An air flow and filtration control system in the form of a headgear which is worn by a physician during a surgical procedure, a technician during an assembly process, or any other user wherein controlled air flow and air filtration is required or desired. The flow-through system includes a relatively rigid, open frame, skeleton headgear structure which substantially surrounds the head of the wearer. A fan is mounted in the headgear structure. The fan is positioned to move air through ducts formed in the headgear structure. A shroud (or hood) is draped over and attached to the headgear structure in such a fashion as to completely cover the headgear structure and to cover at least a portion of the wearer in order to maintain sterile or controlled conditions relative to the wearer. The shroud includes filtration areas which may encompass the entire shroud. The filtration areas may be disposed adjacent to the fans when the shroud is placed over the headgear structure. A relatively planar transparent screen or "window" is provided at the front of the apparatus for substantially undistorted viewing. Typically, the transparent screen is mounted in the shroud and is removable therewith. A suitable power supply, such as a battery pack or the like, is used to selectively power the fans. It is anticipated that at least the shroud (and the components mounted thereto) will be disposable.
23 Claims, 6 Drawing Sheets