Patent Grant
8510870
The present invention relates to an adjustable helmet, and more particularly, to a helmet having an exterior shell that is adjustable laterally and longitudinally.
A variety of helmets are commercially available. Most helmets that are adapted to be worn in sporting, recreational and occupational activities include a hard outer shell that forms a portion of the helmet designed to be impacted, padding adapted to fit between the hard outer shell and the head of a wearer, and in some cases, a band that fits around the head of a wearer to hold the hard shell in place relative to the wearer's head.
Many helmets are designed to be adjustable to accommodate a variety of head sizes and shapes. This adjustability is usually provided in the form of an mechanism that adjusts some component of the helmet, internal to the hard outer shell. For example, many hard hats include a one piece, hard outer shell and a head band that is designed to circumferentiate the head of a wearer. The head band is outfitted with a rotatable dial that shortens or lengthens the band via a rack and pinion mechanism to approximate the circumference of the wearer's head. This type of internal adjustability is helpful, but does nothing to adjust the dimensions of the hard outer shell of the hard hat, which is also referred to as a “helmet” herein. Accordingly, the profile of the hard outer shell remains unchanged, which can present comfort and fit issues for the wearer, and can leave the wearer with a helmet that appears too large for their head—despite “fitting” their head on the inside of the helmet.
Other helmets have alternative designs that enable the hard outer shell to be adjusted from front to back, or longitudinally. An example of these helmets are found in the sport of hockey. Most hockey helmets include a front shell covering the crown and temples of a wearer's head, and a rear shell that covers the sides and the rear of the head. The front shell and rear shell are joined with screws that enable a wearer to adjust the longitudinal (front-to-back) dimension of the helmet. After the adjustment, the user can tighten the screws so that the front and rear shells remain joined in a fixed configuration. While this construction is helpful, it requires the use of tools to make the lengthwise adjustment.
Some more recent helmets, such as that disclosed in U.S. Pat. No. 6,108,824 to Fournier, include manually operable features (that is, no tools are required) to adjust the lengthwise dimensions of the helmet. Even helmets like that in Fournier, however have downsides. For example, while the longitudinal dimensions are adjustable, the helmet is not laterally adjustable. For those with large, wide heads, the typical longitudinally adjustable helmet does not address all fitment issues.
In the bicycle helmet industry, there are helmets that provide longitudinal and lateral dimension adjustment. For example, U.S. Pat. No. 6,647,556 to Grepper illustrates a bicycle helmet including an internal screw mechanism that is joined with guides embedded in different parts of the helmet. When the screws are turned, the guides cause separation of the helmet parts, changing the longitudinal and lateral dimensions of the helmet. While this is useful, the screws require tools for adjustment, the actuating mechanism is relatively complex and appears hard to assemble, and the helmet, when expanded, includes wide-open gaps. These gaps can be easily penetrated by objects that impact the head of a wearer. Thus, such adjustable bicycle helmets are not of much use in sporting, recreational or occupational activities where objects such as sticks are used.
While there are a variety of adjustable helmets currently available, there remains much room to provide improved fully and easily adjustable helmets.
A helmet is provided which is adjustable longitudinally and laterally to fit a variety of head configurations.
In one embodiment, the helmet includes an outer shell having front and a rear shell parts, which are movably joined with one another, and an adjuster. The rear outer shell and/or the front outer shell can include first and second lateral shell portions separated by a slot. The adjuster can move the first and second lateral shell portions away from one another from a narrowed mode to a widened mode to increase the lateral dimension of the helmet. The adjuster also can move at least one of the front shell and the rear shell relative to the other to increase the longitudinal dimension of the helmet as the first and second lateral shell portions move from the narrowed mode to the widened mode.
In another embodiment, the adjuster can be configured to simultaneously increase and/or decrease the lateral and longitudinal dimensions of the helmet. Optionally, the increase or decrease in the longitudinal dimension of the helmet can be proportional to, or can be non-proportional relative to, the increase or decrease in the lateral dimensions of the helmet provided by the adjuster.
In yet another embodiment, the adjuster can be manually operable without the use of tools. Optionally, the adjuster includes a manually rotatable or movable dial or knob, which can actuate the adjuster, and cause it to move the respective portions of the helmet in the desired manner. Further optionally, the helmet can include fasteners, which can secure the respective shell portions in a fixed, immovable configuration after desired manual longitudinal and/or lateral adjustments have been made.
In still another embodiment, the helmet can include a base with the adjuster joined with the base. The base can form a part of the outer shell, and can be joined with the rear shell. In general, the front and rear shells can move relative to the base to provide the longitudinal and lateral dimension adjustment.
In a further embodiment, the base can include a slot cover that extends over and conceals the slot so that foreign objects are impaired and/or prevented from passing through the slot.
In yet a further embodiment, the adjuster includes a strap that extends forwardly to the front shell so that the strap can push the front shell away from the base.
In still a further embodiment, the adjuster includes a manually rotatable dial joined with a rack and pinion mechanism that engages the strap, wherein rotation of the dial extends and retracts the strap relative to the adjuster.
In another, further embodiment, a method is provided that includes providing a helmet including an adjuster, a front outer shell and a rear outer shell movably joined with the front outer shell. The front outer shell and/or the rear outer shell include first and second lateral shell portions separated by a slot. The adjuster is operated to move the first and second lateral shell portions away from one another from a narrowed mode to a widened mode to increase the lateral dimension of the helmet, and to optionally simultaneously move the front shell forward relative to the rear shell to increase the longitudinal dimension of the helmet as the first and second lateral shell portions move from a narrowed mode to a widened mode.
The helmet described herein enables a wearer to alter both the longitudinal and lateral dimensions of the helmet to ensure a comfortable and safe fit. For example, where the profile of the outer shell of the helmet can be adjusted, the wearer can experience a better fit, and an exceptional level of safety. Where included, the manually operable adjuster can enable a wearer to make the desired adjustments while the helmet is on the wearer's head, without the use of tools. This can eliminate repeated trial and error fitment issues common with conventional helmets. Further, where the adjuster adjusts one dimension, then continues to adjust another dimension, a good fit along the latter dimension can also be achieved. In cases where the slot cover is included, the slot that contributes to lateral adjustment can be covered to prevent objects from penetrating the slot and impacting the wearer's head.
These and other objects, advantages, and features of the invention will be more fully understood and appreciated by reference to the description of the current embodiment and the drawings.
I. Overview
A current embodiment of an exemplary helmet is shown in
The helmet 10 can include a hard outer helmet shell 12, which as shown, includes a front shell 20 and a rear shell 30 slidably joined with one another. The rear shell can include first 32 and second 34 lateral portions at least partially separated from one another by a slot 36 extending longitudinally from the rear region toward the frontal region when the helmet 10 is on a wearer's head. The helmet can also include a shell base 50 joined with the rear shell 30. The shell base can include an adjuster 60 including a manually operable dial or knob 62 and a strap 64 extending from the adjuster 60, along the rear shell 30, and forwardly to the front shell 20.
By manually operating the dial 62, the strap 64 can extend and retract relative to the adjuster 60. In doing so, the strap moves the first and second lateral portions 32, 34 away from one another in the direction of arrows 77, widening the slot 36, and reconfiguring the portions 32, 34 from the narrowed mode shown in
As used herein, “helmet” refers to any headgear designed to be worn on a wearer's head, and includes but is not limited to sporting helmets, such as hockey helmets, lacrosse helmets, football helmets, baseball helmets, etc., occupational helmets such as hard hats, military helmets, and recreational helmets, regardless of construction or the materials from which the helmets are made.
II. Construction
A helmet 10 in accordance with a current embodiment will now be described in more detail with reference to
The helmet can include an outer shell 11 including a front shell 20 and a rear shell 30. The front and rear shells can be connected to one another, and in general, can be movable relative to one another. The shells can be constructed from a hard or rigid materials designed to take an impact and distribute the forces from the impact to optional padding on the interior of the helmet. Suitable materials include, but are not limited to, polycarbonates, nylon, thermoplastics, resins, metals, alloys, carbon fibers, and other materials. The front and rear shells 20 and 30 can be of a desired aesthetic configuration, and can include a predetermined number of ventilation apertures to provide added comfort by enabling air to circulate around the head of the wearer.
As illustrated in
The secondary longitudinal locking mechanism 22 optionally can join the front 20 and rear 30 shells in a fixed, and immovable configuration after a wearer manually adjusts the longitudinal dimension 90 of the helmet a desired amount, for example, by sliding the front shell 20 relative to the rear shell 30 to increase the longitudinal dimension of the helmet 10.
The secondary longitudinal locking mechanism 22 can include slots 26 and 27 defined by the rear shell 30, a set of ribs 24 on the rear shell 30 that is designed to interlock with corresponding ribs 28 on the front shell 20, and fastening elements 29, 23 that further interlock the ribs and hold the shells in a desired configuration. Optionally, the ribs 24 and 28 can be replaced with any suitable interlocking mechanism to provide a friction or structural interlocking to prevent forward and rearward movement of the front shell 20 relative to the rear shell 30.
The slots 26 and 27 can be generally linear or curvilinear in structure. Further, the slots can be angled upwardly relative to a horizontal plane as shown in
Although shown as screws 29 that interfit with nuts 23, the fastening elements can be replaced with any suitable fastener such as bolts, cam locks, and the like. The fastening elements also can be designed to be joined with the adjuster 60, and in particular, the adjuster straps 64. For example, one of the nuts 23 can be fixedly joined with the strap guide 66. If desired, however, the secondary locking mechanism 20 can be absent altogether from the helmet.
With reference to
The padding 80 can further include a rear inner pad 85 configured to wrap around the interior surface 14 of the rear shell 30. In general, the rear inner pad 85 can include a central portion 81 and wing portions 83, which extend generally adjacent the lateral portions of the helmet. The central portion 81 can interfit within the recess 87 defined by the front inner pad 82 so that the central portion 81 can slide forward and rearward within the recess relatively freely, yet still provide impact absorption on the top of the wearer's head. Optionally, the wing portions 83 of the rear inner pad 85 can be joined with and cover the adjuster 60 and/or other portions of the base 50. Further optionally, the rear inner pad 85 can be of a continuous piece, with a central portion and wings generally being integral and immovable relative to one another, generally covering the occipital, rear region and top region of a wearer's head as desired.
The front shell 20 optionally can include an additional impact absorption element 89, generally transversing the front of the helmet where most impacts occur. This impact absorption element 89 can be fixedly secured to the front shell 20 using conventional fasteners. The impact absorption element can also be fixedly joined with ends 73 of the adjuster strap 64 as described below in detail with reference to
The inner padding 80 and the impact absorption element 89 can be constructed of any shock absorbing material, for example, expanded polypropylene, expanded polyethylene, vinyl nitrile, polyurethane and/or polystyrene. Further, these components can be joined with the interior surface 14 of the shell 11 with any suitable fastening agents, such as glue, adhesives, tacks, staples, screws, rivets and/or hook and loop fasteners. As desired, additional comfort liners also can be secured between the rear inner pad 85 and the front padding 80 and/or front impact absorption material 89. Although not shown, these elements can be placed to cover the strap 64 as it spans from behind the rear inner pad 85 forwardly to the front shell 20 of the helmet. The comfort liners (not shown) can be secured to the inner surface 14 of the helmet and/or portions of the padding 80 by suitable fastening devices such as glue, adhesives, tacks, staples, rivets and/or screws.
Although not shown, the helmet 10 also can include ear loops and a chin strap attached to the ear loops so that the helmet can be secured to the head of the wearer. If desired, the helmet 10 can also include left and right ear covers to protect the ears of the wearer.
The helmet 10 also includes the rear shell 30 joined with the front shell 20. The rear shell can generally be subdivided into a first lateral portion 32 and a second lateral portion 34. Referring to
Returning to
The slot 36, however, is adapted to change in dimension via adjustment by the adjuster 60. In so doing, the lateral portions 32 and 34 move away from one another to increase the width 35, thereby opening up the slot 36 from a narrowed configuration to a widened configuration. In making this transition, the lateral portions 32 and 34 move from a narrowed mode to a widened mode, so that the lateral dimension 95 of the helmet 10 also increases.
As shown in
As further explained below, the lateral portions 32 and 34 also can be joined by a slot cover 55, which can be joined to the exterior surface 15 of the shell 11 via rivets, screws or any other suitable fasteners. If desired, the slot cover 55 can be integrally molded with the shell 11.
The rear shell 30 and base 50 can include optional guide mechanisms to assist in reconfiguration of the lateral portions from a narrowed mode to a widened mode, and vice versa. For example, as shown in
The guide mechanism 52 can also include a secondary guide element 56 that engages the guide slot 54. As shown in
The guide mechanism 52 shown in
The shell base 50 can be joined with the rear shell 30 via the guide mechanism 52, as well as other mechanisms and structures. For example, as shown in
At its forward most portion, the slot cover 55, and indirectly the base 50, can be fixedly and immovably joined with the rear shell 30 via fasteners 31. Suitable fasteners include, but are not limited to, screws, rivets, bolts and clips, as well as adhesives, cements, and the like. Optionally, the components can be integrally molded with one another as desired. Further optionally, the slot cover 55 can be joined with the bridge 37 of the rear shell 30.
The outer shell 11 can also include a shell base 50, which generally covers at least a portion of the rear of the wearer's head 99. This shell base 50 can be joined directly to the rear shell 30 as described above, and the adjuster can be joined with the adjuster 60. For example, as shown in
As shown in
As illustrated in
As shown in
As shown in
Optionally, if desired, the strap 64 can be a continuous piece (not shown), and can extend from the adjuster 60 forwardly toward the front shell 20 around the front shell 20, and can return back to the adjuster on the opposite side of the helmet. In this configuration, the strap can be fastened to the front shell in a variety of manners such as those explained above.
Referring to
III. Method of Operation
A method of operating a current embodiment illustrated in
The adjuster 60 can also be configured so that when the lateral adjustment is maximized, that is, the lateral portions 32 and 34 are moved to their most outwardly disposed position, and maximum lateral dimension 95, the adjuster 60 continues to increase the longitudinal dimension of the outer helmet shell. Alternatively, the adjuster 60 can be configured to continue increasing the lateral dimension 95 of the helmet shell 11 after reconfiguring the front 20 and rear 30 shells from a shortened mode to a lengthened mode, that is, after moving the shells to their most extended positions, and maximum longitudinal dimension 90.
Referring specifically to
As shown in
Referring to
As a result, the helmet in general is reconfigured from a narrowed mode to a widened mode, with the narrowed mode being shown in
Returning to
With reference to
The transition of the lateral portions 32 and 34 of the rear shell 30 from an inward mode to an extended mode, or vice versa, can occur nearly simultaneously, or before, or after the longitudinal movement of the front 20 and rear 30 shells relative to one another. In the embodiments shown, the lateral movement of the lateral portions 32 and 34 in the direction of the arrows 77 generally occurs simultaneous to the forward movement of the front shell 20 in the direction of the arrow 91. However, after the strap 64 has been extended sufficiently to move the lateral portions 32 and 34 from the narrowed mode to the extended mode, and to increase the width 35 to its maximum point, continued extension of the strap in direction 95 continues to move the front shell 20 in the direction of the arrow 91. In this manner, the adjuster generally increases the longitudinal dimension 90 of the helmet, after moving the first and second lateral shell portions 32 and 34 from the narrowed mode to the widened mode to adjust the lateral dimension 95.
To explain the adjustment of the helmet another way, with the base shell 50 as a reference area, the various components of the front shell 20 and the rear shell 30 can move relative to the base 50. For example, the adjuster 60, when adjusted, pushes the front shell 20 away from the base 50. This, in turn, causes the front shell 20 to slide relative to the rear shell 30, increasing the longitudinal dimension 90 of the helmet 10. Again using the base 50 as a reference region, the adjuster 60 pushes the lateral portions 32 and 34 outward relative to the base. This, in turn, increases the lateral dimension 95 of the helmet. The adjuster 60 can provide the movement of the front shell 20 and the lateral portions 32, 34 of the rear shell nearly simultaneously or in a sequential manner depending on the configuration of the adjuster and its engagement with the respective components of the shell 11.
The operation of the helmet 10 can be explained in yet another way, for example, from the perspective of the helmet being placed on the head of a wearer for fitting, as show in
As a result of this clockwise rotation, the strap 64 retracts toward the adjuster, in the direction of arrow 45. In so doing, the front shell 20, which is attached to the adjuster via strap 64, moves in the direction of arrows 45 and 47 toward the rear shell 30, and/or base 50 of the helmet 10. Where the strap 64 is attached via strap guide 66, or by other mechanisms, to the lateral portions 32 and 34, the strap 64 pulls the lateral portions 32 and 34 from the widened mode as illustrated in
The movement of the front shell 20 toward the rear shell 30 and/or base 50, relative to the movement of the lateral portions 32 and 34, can optionally be proportional. For example, for each increment of longitudinal movement, the adjuster 60 can make a corresponding increment of lateral movement. As a even more particular example, when the adjuster reduces the longitudinal dimensions by ¼ inch, it can simultaneously reduce the lateral dimension by ⅛ inch by moving the lateral portion closer to one another by that distance. The precise proportioning of movement can vary as desired. Furthermore, the adjuster 60 can move the helmet components to adjust the lateral and/or longitudinal dimensions simultaneously or at different times as explained above.
The adjuster 60 can adjust the longitudinal 90 and lateral 95 dimensions of the helmet 10 nearly infinitely, which can enable the helmet 10 to fit a wide variety of users. This lateral and longitudinal adjustment can be performed while the helmet 10 is on the head of the user, simply by manually adjusting the adjustment element 62. If the user desires to set the helmet components in a fixed, immovable configuration, where the longitudinal 90 and lateral 95 dimensions are fixed for an extended period of time, the user optionally can engage the elements 29, manually or with a tool, to operate the longitudinal locking mechanisms 22 and secure the front shell 20 in a fixed configuration relative to the rear shell 30.
The user optionally can also fix the longitudinal dimension 90 of the helmet. To do so, the user can engage the guide pin elements 56, manually or with a tool, to tighten those elements and secure the base 50 in a fixed immovable configuration relative to the lateral portions 32 and 34 of the rear shell 30. In this manner, with the base 50 and rear shell 30 in a fixed immovable configuration, the lateral dimension 95 of the helmet is set in a fixed configuration. If a user desires to alter the dimensions 90 and 95 again after tightening the fasteners or elements, the user can loosen those items and then manually engage the adjuster element 62 to reconfigure the helmet 10 and dial the helmet 10 to the desired dimensions.
The above description is that of the current embodiment of the invention. Various alterations and changes can be made without departing from the spirit and broader aspects of the invention as defined in the appended claims, which are to be interpreted in accordance with the principles of patent law including the doctrine of equivalents. Any reference to claim elements in the singular, for example, using the articles “a,” “an,” “the” or “said,” is not to be construed as limiting the element to the singular.
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