Abstract: A protective helmet having a dome-shaped body and air vent structure in the body comprising a body consisting of molded, synthetic resin sections, a first the section having relatively higher density and a second the section having relatively lower density; the first section extending in strengthening adjacency to the second section, laterally of the vent structure.

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 collapsible carrier adapted for use on the rear portion of a motor vehicle has an outer frame member, an inner frame member and two support arms. The frame members and support arms depend radially from hub assemblies. The angular relationship of the frame members and support arms may be adjusted by small increments and locked at various angular relationships.

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 has an outer shell with a front viewing opening, and a visor swingable between up and down positions. The helmet also includes structure mounting the visor to swing between such positions, and detent structure on one arm portion of a ratchet plate to retain the visor in such positions. The detent structure includes shoulders to lock the visor in at least one of such positions, and to allow easy unlocking by manual deflection of a portion of the visor, away from the shell. The ratchet plate also has a second arm portion attached to an inwardly recessed section of the shell, so that the visor is swingable in closely spaced relation to the shell outer front surface.

Abstract: A motorcyclist or bicyclist helmet has dome shaped top wall structure, side wall structures, a front opening for forward viewing, a shield covering said opening, a lower front wall structure, and rear wall structure. It also includes:(a) frontward facing air inlet defined by the front wall structure, and(b) a face mask carried by the helmet to extend in upright relation inwardly of the lower front wall structure and configured to deflect air received through the air inlet for flow upwardly at the inner side of the shield, and to deflect the helmet wearer's breath away from the shield.

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 forwardly longitudinally extending cyclist's protective helmet includes a dome shaped outer shell having a forward portion, a rearward portion, and a medial portion over which air flows substantially smoothly as the cyclist moves forwardly. That medial portion includes an upper crown and laterally spaced left and right sides extending downwardly and laterally from the crown. At least one opening is located in the medial portion, the opening facing rearwardly and bounded by elongated outer and inner edges which extend substantially laterally. Air flowing over the medial portion acts to aspirate air from within the helmet interior and outwardly through the opening.

Abstract: A heat resistant helmet composite comprises:(a) an outer dome-shaped shell,(b) an inner liner received in the shell, the liner having an outer dome shaped surface to fit in the shell, and(c) a metal foil sheet extending between the shell and the liner and extending over and adjacent the dome-shaped surface of the liner.Typically, the foil sheet is gathered throughout its major extent, to provide multiple locally overlapping layers of foil that increase the heat transfer resistance between the shell and liner.

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 protective helmet system comprises:(a) a protective helmet including a hard outer shell and an impact absorbing liner at the inner side of the shell, the helmet defining a forwardly located viewing gap, and one or two visors at the gap,(b) the helmet having shroud structure to seal off between the helmet and the wearer, thereby to isolate the helmet interior from the exterior,(c) the helmet having inlet port means for entering fluids such as water, oxygen and pressurized air.A modular container may be provided for the fluids.

Abstract: A helmet retention system for a forwardly facing helmet includes:(a) a clip having first, second and third attachment structures which are integrally interconnected,(b) the first attachment structure including generally forwardly extending parallel slots in which a left or right retention strap section is threadable for strap length adjustment,(c) the second attachment structure including a generally upwardly extending additional slot to receive one of two rear strap sections, and(d) the third attachment structure including a hook below the level of said first attachment structure to removably support a connector operatively connected to the other of the left and right retention strap sections, and a cantilevered retainer adapted to be deflected when the connection is applied to the hook or removed therefrom, and which otherwise retains the connector against removal from the hook.

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.