Vented personal flotation device
Personal flotation devices (PFD's), also known as life jackets, swim vests, etc., including various structures which promote an increased flow of air within the PFD thereby conveying warm, moisture laden air away from the wearer, and allowing at least some ambient air to reach the skin or outer clothing of the wearer. Either or both of at least two modes are provided for fluid passage or “venting.” One fluid passage mode is in directions parallel to an inner side (i.e. “lateral”), with fluid passages being defined by structures such as projections or within various three-dimensional permeable materials, such as spacer fabric. Another fluid passage mode is through an aperture in a buoyant intermediate layer. Depending upon the particular design, a blend or combination of these two modes is achieved.
1. A personal flotation vest, comprising:
at least one front panel configured to fit on the front of the torso of a person;
at least one rear panel configured to fit on the rear of the torso of the person and being connected to the front panel;
vest shoulders connected to a top of the front panel and a top of the rear panel and being configured to extend over each of the shoulders of the person to support the front and rear panels on the person;
the front panel, the rear panel and the vest shoulders being configured to expose and not restrain the arms of the person when the vest is worn,
the front panel including:
a front outer layer constructed of a fabric that is permeable to air and moisture;
a front inner layer constructed of a fabric that is permeable to air and moisture;
a front buoyant intermediate layer of buoyant closed cell foam material having an inner side and an outer side and being disposed between the front outer layer and the front inner layer; and
at least one front aperture extending through a mid-region of the front buoyant intermediate layer, and being oriented and configured to allow air and moisture passage in a horizontal direction through said front aperture, the horizontal direction being defined as generally perpendicular to the front outer layer, the front inner layer, and the front buoyant intermediate layer;
ventilation passageways for ventilating the torso disposed adjacent to the inner side of the front buoyant intermediate layer, the ventilation passageways communicating with the front aperture, extending away from the front aperture and extending along and adjacent to the inner side of the front buoyant intermediate layer in directions that are up, down, left and right with respect to the front aperture;
the rear panel including;
a rear outer layer;
a rear inner layer; and
a rear buoyant intermediate layer of buoyant closed cell foam material held between the rear outer layer and the rear permeable inner.
2. The personal flotation vest of claim 1 , wherein said front buoyant intermediate layer further comprises a plurality of projections on said inner side of said buoyant intermediate layer serving as spacers from said front permeable inner layer so as to define said passageways communicating with said aperture.
3. The personal flotation vest of claim 2 wherein the projections are convoluted closed cell foam projections configured to form passageways around each projection, the passageway around each projection being in fluid communication with passageways around adjacent passageways.
4. The personal flotation vest of claim 1 , wherein said front permeable inner layer comprises a three-dimensional knit spacer fabric including spaced-apart inner and outer permeable fabric sublayers interconnected by resilient pile, said resilient pile defining said passageways communicating with said aperture.
5. The personal flotation vest of claim 1 , wherein said front buoyant intermediate layer has an inner side facing towards said front inner layer and which further comprises a plurality of projections on said inner side of said buoyant intermediate layer serving as spacers from said front permeable inner layer so as to define passages that extend from the aperture to a side of the front panel.
6. The personal flotation vest of claim 5 wherein said projections are unitary with said front buoyant intermediate layer and form passageways around each projection, the passageway around each projection being in fluid communication with passageways around adjacent passageways.
7. The personal flotation vest of claim 1 wherein the front aperture and inner and outer layers are configured to provide air and liquid flow through the front aperture.
8. The personal flotation device of claim 1 wherein the rear panel includes at least one rear aperture extending through said rear buoyant intermediate layer oriented to allow fluid passage in a horizontal direction through said rear aperture, the horizontal direction being defined as generally perpendicular to the torso when the personal flotation vest is worn and being generally perpendicular to the rear outer layer, the rear inner layer, and the rear buoyant intermediate layer adjacent the aperture.
9. The personal flotation vest of claim 1 further comprising a plurality of apertures through the front buoyant intermediate layer and the rear buoyant intermediate layer for venting air and moisture to and from the torso of the person, each aperture being oriented to allow fluid passage in a horizontal direction through said aperture, the horizontal direction being defined individually for each aperture as being generally perpendicular to the outer layer, the inner layer, and the buoyant intermediate layer adjacent the aperture in the front or rear panels.