Abstract:
Protective suit for a dog allows a dog to work in a cleanroom or other controlled environment. Suit  10  includes particle-blocking coverall  20  and hood  50.  Hood  50  includes transparent face shield  52  to cover dog&#39;s eyes and snout. Face shield  52  is open at the end to allow air and odors to reach dog&#39;s nose unimpeded. Face shield  52  extends slightly beyond dog&#39;s nostrils to prevent dog from contacting hazardous chemicals or pathogens. Coverall  20  includes fitted sleeves  22  with integral boots  24;  also a tail pouch  30  to keep tail separate and visible.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to garments for animals, and particularly to a protective garment for a dog working in a cleanroom. 
       BACKGROUND OF THE INVENTION 
       [0002]    Four-legged animals, particularly dogs, have long worn simple garments to protect them from cold or wet weather. Dogs have a wide assortment of sweaters, rain jackets, hats, and boots to keep them comfortable outdoors. Dogs that work often wear distinguishing uniforms, such as the colored capes or vests worn by assistance dogs. Dogs that work in law enforcement or the military may even wear armored apparel. 
         [0003]    Dogs that have been groomed for a show may wear some sort of coverall suit to keep them clean, such as to keep them from accidentally rubbing against a dusty surface. Containment suits to keep insecticidal dust in contact with a dog&#39;s fur for a period of time are also known. 
         [0004]    Both types of “cleanliness” garment for a dog are typically designed with air vents to keep the dog from overheating while wearing the coverall. Thus they prevent bulk transfer of dirt or insecticide between the inside and the outside of the suit, but do not totally prevent material, especially small particles and hairs, from entering or leaving the suit. 
         [0005]    One very specialized job that dogs can perform is to identify and locate various harmful materials, such as bacteria, molds, and allergenic chemicals. Colonies of mold, yeast, or bacteria often create chemical products of their metabolism that have an odor that is diagnostic of the type of organism. Dogs can be trained to respond to these characteristic odors and to indicate the location of the strongest source of a detected odor. 
         [0006]    For example, a dog trained to recognize characteristic odors from molds can locate infestations that are not visible, such as on the inner surface of wallpaper or underneath floor covering in houses. Dogs can also find colonies of harmful fungi and bacteria in restaurants, hospitals, and manufacturing areas such as semiconductor fabrication cleanrooms. 
         [0007]    Bacterial types that can be identified by their odors include  E. Coli, Salmonella,  and  Listeria.  These genera include several pathogenic species that are health hazards to animals and humans. Bacteria and fungi can also cause various types of defects and yield loss in manufacturing. 
         [0008]    It is desirable that dogs that perform jobs in restaurants, hospitals or other health care facilities, and manufacturing areas wear distinctive garments to indicate that they are service dogs and not unauthorized pets. Such garments are preferably also protective for the dogs and for the facility. 
         [0009]    For example, dogs typically shed hairs, dander, and other materials when they move. These are allergenic to some people and are never seen as benign when found in a restaurant meal or on a semiconductor wafer. Thus, a garment for a dog working in a facility that prepares food, provides health care, or manufactures microscopic or sterile articles would preferably envelop the dog and keep hair and dander inside. 
         [0010]    It is desirable that a work garment for a dog be constructed somewhat like “cleanroom” garb for humans: made of lintfree fabric that does not allow passage of small particles in either direction, composed of parts that overlap sufficiently that movement does not open a gap between parts or create a “bellows” effect to puff particles out between parts of the garment, and covering substantially all of the body. 
         [0011]    However, human cleanroom garb typically either leaves the face bare or covers the face with a paper or fabric covering that air can penetrate. In the case of extremely “clean” applications, a human cleanroom suit may contain its own air source, such that the person may be totally enclosed in an impermeable unit. 
         [0012]    A dog that is trained to detect certain odors uses a special type of breathing that maximizes the sensitivity of the sense of smell. The dog breathes more air in and out than is generally used for simple respiration and the air is preferably not filtered or obstructed. Filtration of the atmosphere through a permeable mask can add spurious odors and obscure the directionality of a scent. Thus, a cleanroom suit for a dog would have special requirements for the design of the face covering. 
         [0013]    A dog trained to locate odors typically detects an odor then gradually approaches the strongest source of the odor. To signal the center of the odor, the dog may point to the source of odor with a paw, sit down directly in front of it, or stand close to it and wag the tail. Thus, an odor-detecting dog typically comes close to the source of an odor, which may be a pathogen or substance that may be harmful to the dog. 
         [0014]    It would be desirable that a work suit for a dog protect the dog from hazards the dog encounters. Although the dog&#39;s nose must be relatively free to process air, it is desirable that the nose also be protected against accidental or careless contact with harmful substances. In fact, it would be desirable that the dog&#39;s entire body, including the pads of its paws, be protected from contact with pathogens or harmful chemicals. 
         [0015]    There is a need for an identifying garment that a dog can wear while locating characteristic odors in restaurants, hospitals, laboratories, skilled nursing facilities, and cleanrooms. There is further a need for a garment that prevents particles from being shed by the dog while in the controlled facility. There is further a need for a garment that protects the dog from contact with dangerous materials. There is further a need for a protective garment for a dog that does not impede the dog&#39;s breathing or interfere with the dog&#39;s sense of smell. 
       SUMMARY OF THE INVENTION 
       [0016]    The present invention is “clean” garb for a dog that uses the sense of smell to locate harmful bacteria or fungi in controlled environments such as hospitals and cleanroom manufacturing areas. The coverall covers nearly all of the dog&#39;s body and feet while providing a clear airway to the nostrils. 
         [0017]    The garb generally includes a body covering suit with integral booties and a hood for covering the head. The body portion includes a back zipper for entry into the suit. Elongated portions enclose each leg separately for easy walking. An elastic band secures each leg portion above the foot to form a bootie, which may include a flexible sole for walking on. 
         [0018]    Another elongate portion surrounds the tail. An elastic band holds the tail portion firmly near the base of the tail so that wagging or waving of the tail may be clearly seen by the dog&#39;s handler. 
         [0019]    A hood for covering the head is donned after the body portion and overlaps it in the head and neck area. An elastic band secures the hood tightly against the base of the neck. The front of the hood is transparent plastic to allow the dog to see. The transparent portion surrounds the snout and extends slightly beyond it. The end of the transparent portion is open to allow free passage of air, but the extended end of the hood prevents the dog&#39;s nose from contacting any surface. 
         [0020]    The invention will now be described in more particular detail with respect to the accompanying drawings in which like reference numerals refer to like parts throughout. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0021]      FIG. 1  is a perspective, partly exploded view of the dog wearing work garb of the present invention. 
           [0022]      FIG. 2  is a top view of the work garb alone. 
           [0023]      FIG. 3  is a top view of the dog and work garb of  FIG. 1 . 
           [0024]      FIG. 4  is a side view of the dog and work garb of  FIG. 1 . 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0025]      FIG. 1  shows a dog  100  wearing the work garb  10  of the present invention. Work garb  10  includes two main parts: coverall  20  for covering the body and hood  50  for covering the head. 
         [0026]      FIG. 2  shows the parts of work garb  10  in top view.  FIG. 3  is a top view of the dog of  FIG. 1 .  FIG. 4  is a side view of the dog of  FIG. 1 . 
         [0027]    Coverall  20  covers the dog&#39;s entire body except for the front part of the head. Body portion  40  covers dog  100 &#39;s torso and includes a long zipper  43  that selectively opens up back  42  of coverall  20  for dog  100  to don coverall  20 . Neck/head portion  44  covers dog  100 &#39;s neck and the back part of the head. Preferably, neck/head portion  44  terminates near the ears and preferably, as shown, terminates between dog  100 &#39;s ears and eyes. 
         [0028]    Neck/head portion  44  includes a cinching means, such as elastic band  45 , for holding the edge of neck/head portion  44  snugly against the dog&#39;s head. 
         [0029]    Coverall  20  includes a leg covering  22  for each leg. Each leg covering  22  is an elongated sleeve with a closed end. The closed end of leg covering  22  forms an integral bootie  24  for the foot. Cinching means, such as an elastic band  25 , located just above the dog&#39;s foot, holds bootie  24  in place so that dog  100  may walk easily. Alternatively, elastic band  25  may be replaced with other cinching means for holding the bootie in place, such as a strap that is tied or otherwise secured above dog  100 &#39;s foot. 
         [0030]    Coverall  20  preferably includes a tail pouch  30  for enclosing dog  100 &#39;s tail. Tail elastic  35  secures tail pouch  30  close to dog  100 &#39;s tail about an inch or two from the base of the tail. Tail elastic  35  ensures that the tail does not slip inside coverall  20 . Because some dogs  100  are trained to indicate the location of an odor by wagging the tail, it is necessary that the tail remains within tail pouch  30  so that wagging is easily seen. 
         [0031]    Work garb  10  also includes a hood  50  for covering dog  100 &#39;s head without interfering with dog  100 &#39;s senses of vision or smell. Hood  50  generally comprises a bonnet portion  52  and a face shield  56 . 
         [0032]    Bonnet portion  52  is for covering the rear part of dog  100 &#39;s head and overlapping neck/head portion  44  of coverall  20 . Bonnet portion  52  includes neck elastic  55  to hold bonnet portion  52  tightly overlapped over neck/head portion  44 . 
         [0033]    Face shield  56  is attached to bonnet portion  52  and covers the front portion of dog  100 &#39;s head. Face shield  56  is generally in the shape of a truncated cone and constructed from transparent, flexible plastic. Face shield  56  is open at the end near dog  100 &#39;s nostrils to allow for unobstructed breathing and sampling of air for odors. Face shield  56  extends slightly beyond dog  100 &#39;s snout so that dog  100  cannot touch any surface with unprotected nose  101 , lips, or tongue. 
         [0034]    Face shield  52  is preferably constructed of sheet material that is flexible enough to form into the general shape of a truncated cone that fits fairly snugly around the dog&#39;s snout. The preferred material is also sufficiently rigid when rolled into a conical shape that it extends past dog  100 &#39;s nose  101  in a sufficiently rigid manner that dog  100  will not be able to easily dislodge or mash opening  57  and be able to contact dangerous materials with nose  101 . 
         [0035]    Face shield  56  may be permanently attached to bonnet portion  52 , such as by adhesive or by sewing. Alternatively, face shield  56  may be detachable so that it is easily replaced if scratched or contaminated. For example, face shield  56  may be attached with snaps (not shown) that are covered by a placket. 
         [0036]    In an alternative embodiment, not illustrated, face shield  56  comprises a transparent portion of hood  50  sufficient for dog  100  to see through. In such case, opening  57  in the distal end of hood  50  is rigidified, such as by including a plastic armature around opening  57 . 
         [0037]    Coverall  20  and bonnet portion  52  are constructed of suitable woven, knit, or non-woven sheet material that prevents passage of particles and microorganisms. Tyvek is an example of a non-woven material that is suitable for a single wearing. Suitable fabrics woven from synthetic fibers can be used to make work garb  10  that can be laundered and re-used many times. Zipper  43  must be of a type that does not generate free particles when operated. Alternative closure means include ties, snaps, hook and loop fastener, or similar. 
         [0038]    Dog  100  must be appropriately prepared before donning work garb  10 . Dog  100  is thoroughly brushed and bathed. After drying, dog  100  is vacuumed to remove loose hairs and dander. The vacuuming is done before entering the “gowning area” that is typically adjacent to the clean work area. 
         [0039]    The vacuumed dog  100  then enters the gowning area. The human handler with dog  100  dons gloves before helping dog  100  don work garb  10 . Zipper  43  is fully opened and coverall  20  is spread open for dog  100  to step into. Each of dog  100 &#39;s feet goes into an appropriate leg cover  22  and the handler ensures that the foot is fully engaged into bootie  24 , with elastic  25  disposed above the foot. Dog  100 &#39;s tail is similarly placed into tail pouch  30 . Then zipper  43  is closed and neck/head elastic  45  is smoothed in front of dog  100 &#39;s ears. 
         [0040]    Hood  50  is then pulled over dog  100 &#39;s head from the front. Dog  100 &#39;s snout goes into conical face shield  52  and neck elastic  55  is overlapped over neck/head portion  44  of coverall  20 . The handler checks that dog  100 &#39;s nostrils and lips are protected by face shield  52  and cannot touch any external surface. 
         [0041]    This garbing process is typically performed with dog  100  and handler standing on a tacky mat so that any lint or bacteria stirred up by the process is eventually collected by the tacky mat. The human handler typically replaces the gloves with fresh ones after assisting dog  100  don work garb  10 . 
         [0042]    While work garb  10  has been described for use by a dog  100 , it may be seen that work garb  10  can be adapted for use by a similar animal, such as a pig, without loss of the benefits of the invention. 
         [0043]    Although particular embodiments of the invention have been illustrated and described, various changes may be made in the form, composition, construction, and arrangement of the parts herein without sacrificing any of its advantages. Therefore, it is to be understood that all matter herein is to be interpreted as illustrative and not in any limiting sense, and it is intended to cover in the appended claims such modifications as come within the true spirit and scope of the invention