Abstract: A cushion used for uniform compression of a surface with varied topography with minimal stress concentrations. The cushion includes a shaped base and a plurality of flexible projections extending from the shaped base. Each of the plurality of projections has a proximal end attached to the shaped base, a distal end opposite the shaped base, and an axial section extending between the proximal and distal ends. The plurality of flexible projections can individually flex. In an aspect, a facial cushion for use with a mask brace that secures a face mask to a patient's face includes a shaped base and a plurality of flexible projections extending from the shaped base. The individually flexing projections provide greater comfort to a wearer of the mask brace because the flexible projections can conform to the structure of the wearer's face while still providing a seal of the face mask to the face.

Abstract: A method for a person to control transmission of particles to and away from his/her frontal face region including the step of obtaining a face covering apparatus with a frame that can be held on the person's head and a covering assembly on the frame. With the frame on the person's head, the wall structure on the covering assembly is movable between blocking and staging positions. In the former position, the wall structure blocks airborne particles moving toward and away from a person's nostrils and/or mouth. In the latter position, the wall structure does not reside directly forwardly of the person's frontal face region below a horizontal plane at or above a top of the person's mouth.

Abstract: The helmet uses a new fastener to fasten a cage to the helmet shell allowing sides of the cage to be mounted directly against the shell, reducing the width of the shell on each side. A ball is attached to a portion of a bar of the cage to act as a limit stop precluding movements of the cage with respect to the helmet. A chin bar is fastened to the helmet at two points on each side of the shell. The shell is molded with recessed portions designed to receive the two branches of the chin bar on each side where they will be fastened to the shell so that the outer surfaces of the chin guard are flush with the shell at the locations of attachment to provide a smooth transition and reduce weight. An adjustment device to adjust the fit of the helmet to the user includes a star wheel on each side of the helmet attached to an arcuate flexible strip extending rearwardly around the occipital area of the skull.

Abstract: The present document describes a facial interface comprising a flexible face contact layer configured to cover a user's face; and a nasal layer configured to sealably cover an external nose region of said user. The flexible face contact layer and nasal layer provide fluid circulation of air through said user's nostrils.

Abstract: The present invention is a football helmet designed to reduce the occurrence of concussions and subconcussive impacts to the brain through the use of a novel system of materials and design implemented on the interior and exterior of the helmet. The helmet disclosed herein can include a new impact absorption system using cylindrical segments of viscoelastic foam with a sealed central void to absorb high energy impacts. In some aspects, the helmet disclosed herein includes a multi-layer helmet designed to absorb a wide range of potential impacts.

Abstract: A protective headgear for a baseball or softball fielder includes a rigid outer protective shell that has a first side portion, an opposing second side portion and a brim that extends outwardly from a front portion. The outer protective shell has a top opening and a rear opening that is defined between the first and second side portions. As a result, the protective headgear does not completely circumscribe the fielder's head. The protective headgear also includes an impact absorption material disposed along an inner surface of the outer protective shell and also an inner cap to be worn beneath the outer protective shell. The inner cap is formed of a breathable material and can be in the form of a skull cap.

Abstract: A mud visor formed by a substantially transparent sheet is attached to a goggle lens. The mud visor may be attached to the goggle lens using a substantially transparent adhesive or adhesive tape. Thus, the mud visor may provide clear and improved field of view for the user. Further, the mud visor may be configured to cover and guide a top portion of a roll-off film as the roll-off film is conveyed across the goggle lens. A top portion of the mud visor may be inserted into the lens groove of a goggle frame along with the goggle lens when the goggle lens is attached to the goggle frame. The mud visor also may stretch across the goggle lens and overlap with film canisters at both sides to provide a seamless coverage to prevent mud from entering behind the mud visor or the roll-off film.

Abstract: A face protection system is provided in the form of a face shield attachable to a hard hat. An upper portion of the face shield includes at least one loop surrounding at least a portion of an opening. The opening is sized to allow at least a portion of a dome of the hard hat to fit upward therethrough, but small enough to keep the entire hard hat from passing therethrough, so that the upper portion of the face shield rests upon the hard hat. A mask extends down from the upper portion of the face shield and preferably includes a plurality of columns on a front side thereof in front of a face of a wearer of the hard hat. Preferably ribs extend laterally between the columns, with the columns and ribs together forming the mask. A visor can optionally be placed inboard of the mask.

Abstract: A protective face shield with respirator including a face shield sized to cover some or all of the face and a respirator attached to the back side of the plastic shield. The respirator can include a substantially tubular, compressible foam mask with one end of the tubular mask bonded to the back side of the plastic shield and the other end of the tubular mask oriented rearward creating a rear surface for engaging with the face and surrounding the nose and mouth. The tubular mask can include at least one ventilation opening that traverse through the wall of the tubular mask and a ribbon (e.g., strip) of air filter media that wraps at least partially around the outside of the tubular mask covering some or all of the outside surface of the mask.

Abstract: A helmet mounting assembly for attaching helmet accessories to a helmet is provided. The assembly comprises a front-to-back mounting unit comprising at least one rail, grip or connector configured for connecting at least one helmet accessory to the front-to-back mounting unit, whereby the front-to-back mounting unit further comprises a back end configured to enable passage of securing elements there through, and at least one clipping element for attaching the back end of the front-to-back mounting unit to a back edge of the helmet via the securing elements, configured to further pass through the at least one clipping element, and forcefully pulling the front-to-back mounting unit onto the surface of the helmet to squeeze the mounting unit onto the helmet.

Abstract: A disposable face shield designed to protect the eyes and face of wearers from various diseases, such as COVID-19. The face shield assembly includes a transparent shield panel coupled with a front strap and back strap. The front strap contacts the forehead and spaces the transparent shield panel away from the face. The back strap extends around the head and holds the transparent shield panel on the head. Each of the straps are adjustable for different type head sizes.

Abstract: A shock absorber, for use with headgear having a faceguard, has a sliding member that does not extend beyond the support structure of the shock absorber in a way that would leave it vulnerable to damage. A headgear having a faceguard provides a protected mounting location for mounting a shock absorber for the faceguard.

Abstract: A protective cap is described. The protective cap includes a protective case having a padded inner surface and a rigid outer cover. The rigid outer cover includes a forward facing portion. The forward facing portion includes an aperture having a width approximately equal to a width of the forward facing portion. The protective cap also includes a pair of side facing portions and an optional head cover fitting. The optional head cover fitting is attached to the protective case, and an optional face shield. The optional face shield is connected to a track located on a pair of side facing portions of the protective case. The outer shell includes variable transparency and/or opaqueness allowing a visualization of information, such as a team logo, on a separately worn traditional baseball/other sports cap. Alternatively a logo/design is applied directly to the outer shell of the protective cap.

Abstract: A device for fixing to a helmet is described. The helmet includes a shell portion configured to receive a user's head, and the device includes a leaf spring for coupling to the shell portion and configured to dissipate impact forces. A helmet including such device is further described.

Abstract: A helmet includes a housing sized for use on a human head and having an opening designed to expose a face associated with the human head and a facemask attached to the housing and situated over the opening to cover the face. The facemask has a slightly curved front portion, a slightly curved right side portion, and a slightly curved left side portion. The facemask has a plurality of substantially vertically oriented bars having different widths. The vertically oriented bars include a first type having a first width, a second type having a second width that is larger than the first width, and a third type having a third width that is larger than the first and second widths. The left and right side portions of the facemask include a first type bar and a second type bar, where the second type bar is situated nearer to the housing than the first type bar.

Abstract: A maintenance-free respirator 10 that includes a mask harness and a mask body 11. The mask body 11 has at least one layer of filter media 56 and has a perimeter 32 that includes an upper segment 34. The upper segment 34 includes first and second concave segments 36, 38 that are located, respectively, on first and second sides of a central plane 40, when viewing the mask body from a top view. A maintenance-free respirator 10 of this configuration is comfortable to wear and can provide a snug fit to a wearer's face, particularly beneath each of the wearer's eyes, while at the same time having an ability to improve compatibility with various protective eyewear.

Abstract: A helmet tool including a housing; a pin at least partially disposed in the housing; a trigger mechanism operatively engaged with the pin, wherein the pin and trigger mechanism may be configured together within the housing such that actuation of the trigger mechanism causes the pin to one of extend from or retract into the housing; and a latch connected to the housing.

Abstract: The secondary part (17), for securing on and/or in a dental implant, is suitable for receiving a tertiary part. The secondary part (17) has a secondary-part body (22) with a recess (21) on the inside, and a secondary-part screw (20) receivable or received in the recess. The secondary part (17) has a screwing-in mechanism in the form of a contour for receiving a screwing-in tool for screwing the dental implant, connected to the secondary part (17), into a jawbone.

Abstract: A method and system are provided for placing nose wires in a facemask production line. A supply of individual pre-cut nose wires are supplied to a dispenser in the production line. With the dispenser, the nose wires are metered at a defined spacing and orientation onto a running carrier web that is conveyed past the dispenser. The carrier web and nose wires deposited thereon are conveyed to a folding station wherein a binder web is folded over an edge of the carrier web such that the nose wires are encapsulated between the binder web and the carrier web.

Abstract: A skydiving helmet including a helmet shell having a front opening, is provided. The helmet further includes a visor having a lateral mounting section, where the visor is operable between a lowered position and a raised position. The skydiving helmet also includes a visor mounting system laterally positioned on the helmet shell to pivotally connect the lateral mounting section to the helmet shell. The visor mounting system includes a base plate having a cavity formed therein with a locking slot and a guiding section communicating with one another. The visor mounting system also includes a locking element positioned within the cavity and being operable between an extended configuration for preventing rotation of the visor, and a retracted configuration for allowing a frontward translation of the visor, away from the helmet front opening, and subsequent rotation of the visor, from the lowered to the raised position.

Abstract: Headgear for a shielding garment for operating on components exposed to high voltage, or for operating at a safe distance proximate to high voltage parts, or for activities involving exposure to high electric and/or electromagnetic fields at any frequency and voltage is disclosed. The headgear comprises a cover element which is configured to cover the head of an operator and has an opening at least at an upper portion of the operator's face. The headgear further comprises a transparent face shield made of an electrically conductive fabric. The face shield is removably coupled to the cover element to close the opening and is electrically connected to the shielding garment. The fabric has a density ranging from 25 to 40 g/m2 and comprises a plurality of yarns having a yarn count ranging from 10 to 30 deniers, and each comprising a respective core externally covered with a coating made of a conductive metal.

Abstract: A hat, such as a cap or a visor, has a typical neck cover and an onboard face cover that at least partially covers a user's face. The face cover is positionable between a deployed position wherein the face cover covers the user's face and the neck cover covers the user's neck area and a stowed position wherein the inner surface of the face cover is positioned against the inner surface of the neck cover. The face cover is held in the stowed position by either cooperating snaps or sections of hook and loop material located on the inner surface of each component with the respective units matingly engaged with one another.

Abstract: A helmet is disclosed for sports that protects the wearer from impact that may cause head trauma. The helmet includes a recoiling shock absorber system on one or more portions likely to sustain direct blows. The shock absorber system may move omnidirectionally in response to the line of force received at impact by a facemask connected to the shock absorber. Impact to the portion of the helmet receiving a hit may be dissipated through the shock absorber system and distributed into the remaining shell of the helmet.

Abstract: An improved-seal mask for the respiratory therapy of the type comprising a shaped shell (12) at least covering mouth, nose and eyes of a patient (11), and provided, along a perimeter (13) which is suitable for being placed in contact against the patient's face, with a sealing gasket (14), said shaped shell (12) being provided with at least one inlet fitting (15) for the mixture of air and oxygen, said mask also comprising a neckpiece (20) provided with a plurality of prongs (21), each joined in a fixed or removable manner to a corresponding fastening point (17), distributed over the perimeter of the shaped shell (12), is provided with five fastening points (17) for the neckpiece (20), wherein two upper fastening points (17?) are arranged at the height of the eyes, symmetrically with respect to a sagittal plane, two lower fastening points (17?) are arranged at the height of the chin, symmetrically with respect to a sagittal plane, and a fifth fastening point (17??) is arranged centrally along an upper edge (18

Abstract: A breakaway facemask system for reducing injuries from a facemask penalty in American football includes a helmet that is worn during athletic activities. A cage is removably coupled to the helmet. The cage is positioned to cover to the opening thereby protecting a user's face from impact. A plurality of retainers is provided and each of the retainers is coupled to the helmet. Each of the retainers releasably engages the cage such that the cage is removably coupled to the helmet. The cage breaks away from the helmet when the cage is gripped thereby reducing the possibility of injury to the user.

Abstract: A protective facemask for a helmet includes one or more compression portions. In one aspect, a facemask of a plurality of arcuately curved bars includes a frame portion and lateral bars configured to extend across the frontal opening of the helmet and join to the frame portion at terminal ends. The lateral bars include one or more compression portions which are more compliant to a given force than other portions of the plurality of arcuately curved bars. A compression portion may include a first material that is less rigid than a second material forming the other portions of the arcuately curved bars. A compression portion may further include first and second zones, with the first zone being more compliant to the given force than the second zone. Such compression portions may be positioned within the lateral bars near the point of joining with the frame.

Abstract: Embodiments of the present disclosure provide for a modular helmet apparatus and system comprised of a removable outer shell disposed on an inner frame. The disclosed football helmet provides for enhanced energy diffusion through the use of one or more energy diffusion areas disposed on an outer shell of the helmet, the one or more energy diffusion areas being configured to align with the energy diffusion zones of the frame. Embodiments of the present disclosure enables a user to quickly and easily replace or swap the outer shell of the helmet with a second or replacement shell by selectively coupling the desired outer shell with the frame.

Abstract: A goggle frame and an adaptor configured to attach to the goggle frame are disclosed in accordance with various embodiments. The adaptor may allow the goggle frame to adapt to different lenses or accessories. In particular, the adaptor may allow the goggle frame to adapt to lenses of different sizes, thicknesses, shapes, shades, colors, prescriptions, curvatures, and the like. Further, the adaptor may allow the goggle frame to adapt to various accessories, such as roll-off film systems of different sizes, various imaging devices, e.g., cameras, video cameras, display devices, e.g., LCD or LED displays, heads up displays, lighting devices, Global Positioning Systems (GPS), and the like.

Abstract: A helmet is disclosed for sports that protects the wearer from impact that may cause head trauma. The helmet includes a recoiling shock absorber system on one or more portions likely to sustain direct blows. The shock absorber system may move omnidirectionally in response to the line of force received at impact by a facemask connected to the shock absorber. Impact to the portion of the helmet receiving a hit may be dissipated through the shock absorber system and distributed into the remaining shell of the helmet.

Abstract: The invention provides a face shield for sports activities. The face shield comprises a facial covering shield, a plurality of foam pads, a nose shield portion and a pair of detachable straps. The facial covering shield has a pair of eye openings. The pair of detachable straps around the cheek and the forehead are fully adjustable and provide a comfortable and secure fit for the user. The nose shield portion protects the user's nose from injuries. The plurality of foam pads includes a pair of forehead pads and a pair of cheek pads, and, the plurality of foam pads are removable and reusable and can be adjusted to desired position to create perfect fit for the user's face. The design of the face shield is more unique and fits on the top of the forehead and leaves plenty of space and protects the eye portion and reduces and eliminates vision problems.

Abstract: A force attenuating helmet construction including a rigid layer generally conforming to the wearer's head. A plurality of force absorbing and reacting portions extend from locations of the rigid layer such that, in response to an impact event experienced by the helmet, the absorptive and reactive forces minimize impact forces transferred to the user's head and spine. The helmet can include inner and outer rigid layers, or shells, and which are spatially supported by a plurality of force attenuating components. A dual compression coil is associated with each of opposite end mounting portions of a face mask with the outer shell for providing for bi-directional force absorbing displacement of the mask portion.

Abstract: A helmet can include a helmet body and a shield. The helmet body can include a front portion and a tail portion, and the shield can include two ear portions connected by a brow portion. The shield can be releasably coupled to the helmet body. The ears of a helmet user can be exposed with respect to the helmet body and covered with respect to the shield. The brow portion of the shield can extend across the front portion of the helmet. The tail portion of the helmet can be tapered and the front portion of the helmet can have a rounded leading edge, such that the helmet body has a tear drop form factor.

Abstract: A helmet slide assembly is attached to a helmet and functioning to enable a tilting of a visor relative to the helmet. The helmet assembly includes a base plate that is attached to a sidewall of the helmet and a slide plate disposed substantially in a parallel arrangement relative to the base plate and secured to a sidewall of the visor. The slide plate has an elongated slot for receiving a pivot member. The assembly also includes a pivot plate having locked and unlocked positions. The pivot member is secured at one end thereof to the pivot plate and the slide plate is constructed and arranged for a sliding motion once the pivot plate is unlocked.

Abstract: A football helmet comprising a rigid plastic shell adapted to cover the head of a wearer and a faceguard in the form of a cage of metal bars and removably attached to the shell. The faceguard includes an upper portion including an uppermost bar having a center bar part and a pair of side bar parts, and a horizontal bar below the center bar part and connected to the center bar part by a vertical bar, the uppermost bar and horizontal bar defining a gap between them which extends the entire length of the horizontal bar. The faceguard has a pair of raised eyebrow areas, each raised eyebrow area consisting of one of the pair of side bar parts bent upwardly with respect to the center bar part, in the uppermost bar being positioned on either side of the front portion of the shell and above the lower edge of the front portion of the shell.

Abstract: An improved design for a helmet to reduce injuries caused by helmet-to-helmet collisions. Certain embodiments include novel quick release features that permit the detachment of a facemask from a helmet in 30 seconds or less, resulting in the ability to attend to an injured player in a rapid fashion and without the need for any additional tools to accomplish such removal. Other aspects relate to impact energy absorbing constructions, including shock absorbing systems and PEEK facemask designs, that when combined with the quick release features described, provide a superior helmet for a player's protection.

Abstract: Provided is a face protector provided with a transparent film sheet to protect a viewing window of any one working mask selected from a safety face shield or a welding helmet. One or more transparent film sheets are inserted into a gap between the surface of the upper part of the viewing window and the bent inner surface of an upper support brim and thus combined with the surface of the viewing window, thereby preventing contaminants, paints, slag or metal particles, which may contaminate the viewing window during a working process, from being attached to the viewing window, securing a worker's clear view to increase worker safety, and to greatly extending the working mask.

Abstract: The present invention is a gel cushion that is placed on a user's nose bridge before putting on a ventilator mask. The gel cushion is composed of a tacky gel material, such as a viscoelastic polymer gel. The gel cushion is wider than the edges of the ventilator mask and remains in place even if the mask is repositioned. The gel cushion adapts to the user's face in the area on and around the nose bridge to cushion and seal the ventilator mask in that area.

Abstract: A faceguard retaining device has a base with underlying portion extending along a surface of a helmet shell. A latch, pivotally mounted to the base, has a hooked part, a pair of nubs and a pair of trunnions, the nibs and trunnions being in grooves of the base when the latch is in a closed and locked condition to prevent the latch from opening. A clip engaged to the latch and base biases the latch closed. A stabilizer is in a stabilizer groove of the base and a plate extends over the underlying portion. A fastener fastens the plate and base to the shell to resists bending of the underlying portion. The latch is lifted from the underlying portion to lift the nubs from the grooves and allow the latch to pivot upwardly into an open condition.

Abstract: A shock absorber, for use with headgear having a faceguard, has a sliding member that does not extend beyond the support structure of the shock absorber in a way that would leave it vulnerable to damage. A headgear having a faceguard provides a protected mounting location for mounting a shock absorber for the faceguard.

Abstract: A helmet attachment system is usable to attach a mandible or face or mouth guard. The helmet attachment system also comprises a pair of attachment bases, each arranged on a side of the helmet near to an ear covering of the helmet. The attachment bases each include a metal base plate covered by an attached body block. Each attachment base provides provisions for attaching opposite ends of a mandible to the bases. The metal base plate includes hooks for engaging an edge of the helmet. A pair of strap assemblies is provided, each strap assembly connected to one attachment base. The strap assemblies extend rearward and are connected to the back rail by a buckle member on the end of each strap assembly. The back rail includes a pair of buckle member-receiving slots. The straps assemblies and the hooks provided on the attachment bases secure the attachment bases to the helmet.

Abstract: A football helmet with shell, faceguard, padding and comfort liner system, has replaceable nose bumpers for connecting a top center of the faceguard to the shell, button and keyhole connectors connecting the liner to an inner surface of the padding and T-nut connectors for connecting the padding to an inner surface of the shell. Front portions of the comfort liner have harder foam cushions than other portions of the liner to improve impact absorption. Selected areas of the padding system contain pads with inner and outer molded thermoplastic urethane parts of different durometer, each including a sheet with plural alternating hollow protrusions. The faceguard has an upper bar with raised ends above a lower edge of the front portion of the shell that form a face opening and on either side of the nose bumper.

Abstract: A shock-absorbing face guard connector for an athletic helmet such as a helmet worn in American football, ice hockey, cricket, or baseball and softball. The shock-absorbing face guard connector couples a face guard to the athletic helmet, and can absorb some or all of the forces resulting from a strike to the face guard amid play. The shock-absorbing face guard connector includes a compressible piece that can compressible yield when the face guard is struck.

Abstract: A helmet for use by a driver of a vehicle or vessel includes a chin guard extending from side to side over the front open part of a helmet shell molded to an open-face shape, and supported about an axis passing through the right to left side of the helmet shell so as to swivel up and down, the chin guard including a surface layer member formed from a flexible material so as to be deformable by deflection into a shape conforming to different widths of different helmet shells, and a core member formed from a rigid material and mounted inside of the surface layer member to inhibit the surface layer member from deflection.

Abstract: A protective frame of a mask includes: a first frame unit integrally formed as one piece, and including a first protective part for protecting a portion of a face of a user, and a first connecting part integrally connected to the first protective part; and a second frame unit integrally formed as one piece, and including a second protective part for protecting another portion of the face of the user, and a second connecting part integrally connected to the second protective part. The first connecting part is connected to the second connecting part, and the first frame unit and the second frame unit are connected together to constitute the protective frame.

Abstract: Face armor according to the invention comprises a face guard having dual side panels for disposition on opposite sides of the head of a person wearing the face armor, wherein a side slit extends upwardly from the bottom edge of each side panel such that the chin strap of a helmet extending to the chin of a person wearing the helmet extends over a portion of the side panel rearward of the side slit, passes through the side slit, and extends under a portion of the side panel forward of the side slit, thereby minimizing interference from the face guard to a snug and comfortable fitting of the helmet's tightened chin strap along the side of the person's head. In one embodiment fasteners close over each side slit and a portion of the chin strap to secure the forward and rearward portions of the side panel together.

Abstract: A face shield, such as a visor, mounts to a protective helmet using a mounting assembly. The mounting assembly has a base, a spacer assembly, and a pair of posts. The base is disposed on the interior of the helmet. The posts are connected to the base and extend outwardly through holes that are formed in the side of the helmet. The spacer assembly slides over the posts when the posts are inserted through the corresponding holes in the helmet, and frictionally engages the outer surfaces of the first and second posts such that the helmet is disposed between the base and the spacer assembly. The posts threadingly receive corresponding fasteners that attach the face shield to the helmet.

Abstract: An ergonomic facemask for a headpiece, including a wire cage having a plurality of horizontal wires and a plurality of vertical wires. The plurality of horizontal wires includes a horizontal wire configured to extend forward of a user's face at a height between the user's nose and the user's upper lip, and the plurality of vertical wires includes a center vertical wire that extends along the sagittal line of a user's face. The mutual arrangement of the center vertical wire together with the horizontal wire adequately shields a user's face while avoiding interference with the user's field of view.

Abstract: Draping particulate filters for use with at least the nostrils is disclosed. The draping particulate filters include diaphanous PM filter material, a biocompatible skin contact adhesive located on at least a skin contact side of part of the diaphanous PM filter material, and at least one line of perforations. Methods of making draping particulate filters are also disclosed.

Abstract: An adjustable hockey helmet includes a front shell that is longitudinally movable relative to a rear shell to adjust the length of the helmet. One or more substantially rigid straps or similar elements are attached to the front shell and extend to the interior of the rear shell. A cam mechanism or similar device is included on the rear shell for securing the straps directly or indirectly against the interior of the rear shell to prevent longitudinal movement of the front shell relative to the rear shell once the helmet is adjusted to a desired length. Alternatively, the one or more straps may be attached to the rear shell and the cam mechanism may be included on the front shell.

Abstract: An adjustable hockey helmet includes a front shell that is longitudinally movable relative to a rear shell to adjust the length of the helmet. One or more substantially rigid straps or similar elements are attached to the front shell and extend to the interior of the rear shell. A cam mechanism or similar device is included on the rear shell for securing the straps directly or indirectly against the interior of the rear shell to prevent longitudinal movement of the front shell relative to the rear shell once the helmet is adjusted to a desired length. Alternatively, the one or more straps may be attached to the rear shell and the cam mechanism may be included on the front shell.