Abstract: A helmet has a generally dome shaped helmet body with inner and outer sides and a lower edge extending generally in the shape of a loop; an elongated reinforcement member is embedded in the helmet to extend proximate the looping lower edge portion; that member may have band shape; and additional such band shaped reinforcement members may extend within the dome shape of the helmet. Openings may be provided through the body to pass retention straps, a first strap holder configured to be supported at and by the outer side of the helmet, the holder attached to at least one strap that extends through one of the openings, and the holder operable to transmit strap tension to the helmet. The holder typically holds two strap ends, and defines slots through which the straps pass for adjustable retention by the holder.

Abstract: A helmet retention system includes a junction plate which, when tilted relative to the wearer's cheek, loosens its grip, on a chin strap. The plate has a triangular cross section cross piece with narrow lands having edges normally gripping the chin strap. Also, the helmet has a lower outer side which loops about the helmet and is shaped to grip a replaceable textile band, which is decorative.The helmet includes a strap section that extends crosswise of the uppermost, forward, domed extent of the helmet; and, the helmet may typically have air inflow and outflow openings, and an air flow channel, relative to which the strap section extends crosswise.

Abstract: A helmet has a generally dome shaped helmet body with inner and outer sides and a lower edge extending generally in the shape of a loop; an elongated reinforcement member is embedded in the helmet to extend proximate the looping lower edge portion; that member may have band shape; and additional such band shaped reinforcement members may extend within the dome shape of the helmet, such as laterally spaced rib or ridge portions.

Abstract: A helmet has a generally dome shaped helmet body with inner and outer sides and a lower edge extending generally in the shape of a loop; an elongated reinforcement member is embedded in the helmet to extend proximate the looping lower edge portion; that member may have band shape; and additional such band shaped reinforcement members may extend within the dome shape of the helmet. Openings may be provided through the body to pass retention straps, a first strap holder configured to be supported at and by the outer side of the helmet, the holder attached to at least one strap that extends through one of the openings, and the holder operable to transmit strap tension to the helmet. The holder typically holds two strap ends, and defines slots through which the straps pass for adjustable retention by the holder.

Abstract: A helmet has a generally dome shaped helmet body with inner and outer sides, openings through the body to pass retention straps, a first strap holder configured to be supported at and by the outer side of the helmet, the holder attached to at least one strap that extends through one of the openings, and the holder operable to transmit strap tension to the helmet. The holder typically holds two strap ends, and defines slots through which the straps pass for adjustable retention by the holder.

Abstract: A helmet retention system includes a junction plate which, when tilted relative to the wearer's cheek, loosens its grip, on a chin strap. The plate is attached to a strap or straps which are in turn attached to the helmet. The plate has a triangular cross section cross piece with narrow lands having edges normally gripping the chin strap. Also, the helmet has a lower outer side which loops about the helmet and is shaped to grip a replaceable textile band, which is decorative.

Abstract: A helmet strap clip assembly includes two clip elements, each connectible to a helmet strap or straps, the two elements having interconnectible tongue and groove parts whereby they are connectible together and disconnectible from one another in response to finger pressure exertion thereon, the connection enabling guiding of one clip element onto the other and into registered position, for interconnection.

Abstract: A bicyclist's helmet has an outer shell; an inner liner; forward air inlet structure and rearward air discharge structure, as well as air channeling in between the inlet and discharge to provide ram effect cooling; resiliently collapsible bellows padding on the liner to engage the wearer's head; retention straps that pass through the liner in order to attach to the outer shell; insert plugs associated with the outer shell to anchor the straps in spaced relation to the channeling and collapsible pads; a wrap-around eye protective visor that also provides a sun shade, the visor being detent adjustable at the front of the helmet; and a retention strap buckle that takes-up excess strap length.

Abstract: A cyclist's helmet incorporates a dome shaped top wall structure, opposite side wall structures, a front opening for forward viewing, a lower front wall structure which extends forwardly and a rear wall structure. It also includes:(a) a frontward facing air inlet means defined by said wall structure, and an air outlet means defined by said wall structure generally rearwardly of said lower front wall structure, and(b) passage means in said wall structure including said side wall structure to receive air inflow from said inlet means for circulation to the upper interior of the helmet and subsequent flow via said wall structure and to said outlet means,(c) said inlet means, passage means, and outlet means located to enhance cooling air flow through the helmet.

Abstract: A visor on a helmet incorporates a transparent curved shield that extends downwardly. The visor and shield have a tongue and groove interfit that provides a quick slide interconnection, without separate fasteners.

Abstract: A motorcyclist's or bicyclist's helmet has dome shaped top wall structure, side wall structures, a front opening for forward viewing, a lower front wall structure which juts forwardly, and rear wall structure; and it also includes:(a) a frontward facing air inlet defined by the lower front wall structure,(b) passage structure in the helmet to receive air inflow from the inlet for circulation to different portions of the interior of the helmet and subsequent flow to the helmet exterior, and(c) a closure carried by the helmet front wall for movement adjustably controlling said passage structure.In addition, the helmet typically includes a shield, and said passage structure includes a primary passage to direct inflowing air toward the inner side of the shield, and a secondary passage to direct inflowing air rearwardly toward the interior of the helmet.

Abstract: A cyclist's helmet incorporates a dome shaped top wall structure, opposite side wall structures, a front opening for forward viewing, a lower front wall structure which extends forwardly and a rear wall structure. It also includes:(a) a frontward facing air inlet means defined by said wall structure, and an air outlet means defined by said wall structure generally rearwardly of said lower front wall structure, and(b) passage means in said wall structure including said side wall structure to receive air inflow from said inlet means for circulation to the upper interior of the helmet and subsequent flow via said wall structure and to said outlet means,(c) said inlet means, passage means, and outlet means located to enhance cooling air flow through the helmet.

Abstract: A bicyclist's helmet comprises:(a) an outer shell containing distributed openings through which air streams may enter the helmet,(b) a liner in said outer shell and supporting same adjacent such openings,(c) the liner forming left and right air flow channels communicating with the openings, the channels openly facing the interior of the helmet lengthwise of the channels for conducting air toward the rear of the helmet.In addition, a screen may be located over at least one of the channels; the openings may be transversely elongated and have narrow slit width to increase air pickup yet maintain helmet strength; a removable brow perspiration pad may be employed inwardly of a frontal opening in the helmet; an adjustable visor may be incorporated in the helmet; and a quickly attachable and detachable connection may be employed on the helmet retention system.