Protective Helmet
A firefighter's helmet comprising an inner protective shell configured to be worn on its own as a helmet and an outer protective shell configured to be fitted over the inner shell and realizably retained thereon, a retaining mechanism for retaining the inner shell in the outer shell, wherein the retaining mechanism is moveable by a user whilst wearing the inner shell between a first position in which the retaining mechanism engages a said shell substantially to prevent relative movement between the two shells, and a second position in which the retaining mechanism permits relative movement of the shells whereby allowing the donning or doffing of the outer shell by the user.
The present invention relates to protective helmets, and in particular to firefighters' helmets.
Existing firefighters' helmets comprise a protective outer shell made from impact-resistant plastics or the like which is intended to protect the wearer from falling debris which often is a hazard of burning buildings. To protect the wearer also from the heat and sparks emitted from a fire, the helmet includes a visor and neck protector to protect the head, face and neck of the wearer.
There are cases where the full protective effect of a firefighting helmet is not required. For example, firefighters may have to provide a rescue service at other emergencies in which there is no fire. Then a large firefighting helmet may be inconvenient, but head protection is still necessary. In particular, in the case of road traffic accidents, when a firefighter may need to work in a confined space eg. Within a damaged vehicle, the large helmet may be an impediment. In these cases, it is often found that firefighters will simply remove their helmets, exposing themselves to unnecessary danger. The preferred embodiments of this invention seek to provide a solution to this problem.
Although some two-layer helmets have been proposed to solve this problem it is awkward to both fit the inner and outer helmets on the wearers head securely and provide a wearer friendly mechanism for disengaging the outer helmet.
According to this invention there is provided a firefighters helmet comprising an inner protective shell configured to be worn on its own as a helmet, and an outer protective shell configured to be fitted over the inner shell and releasably retained thereon, comprising a retaining mechanism for retaining the inner shell in the outer shell, wherein the retaining mechanism is moveable by a user whilst wearing the inner shell between a first position in which the retaining mechanism engages a said shell substantially to prevent relative movement between the two shells and a second position in which the retaining mechanism permits relative movement of the shells whereby allowing the donning or doffing of the outer shell by the users.
Preferably the outer shell has an outwardly extending brim or cape.
The helmet may comprise a spacer for spacing the outer shell from the inner shell. The helmet may comprise a visor which is accommodated between the inner and outer shells when not in use.
The retaining mechanism may be releasably biased towards the first position. Preferably the retaining mechanism is moveable by a user whilst wearing the inner shell in order to move it from the first to the second position for allowing the introduction or removal of the outer shell onto or off the inner shell. The retaining mechanism may be pivotally connected to the helmet. The retaining mechanism may be pivotally mounted to an attachment mechanism which is connected to the outer shell, the retaining mechanism thereby being spaced from the outer shell.
The inner helmet may comprise a slot which is engageable by the attachment mechanism such that when the retaining mechanism is in the second position the attachment mechanism can be moved through the slot whilst when the retaining mechanism is in the first position the attachment mechanism cannot be moved through the slot. The retaining mechanism may engage a lower edge of the slot whilst in the first position.
The attachment mechanism may comprise a mounting for an accessory to the helmet.
The retaining mechanism may be disposed on the outer shell, in which case it may engage a lower edge of the inner shell.
A helmet as described above may comprise a mounting for attaching at least one accessory to the helmet.
Embodiments of the invention are now described purely by way of example and with reference to the following figures:
FIGS. 4 to 7 show outer helmet shells with provision for various detachable accessories and ancillary equipment;
As can be seen from the arrows linking
The rim 32 of the inner shell 12 engages pads (not shown) on the inner surface of the outer shell 22 around the greater part of its circumference, except at the front where a gap is provided to permit the passage of the visor 24. A further pad or pads (not shown) is provided in the comb 34 so that when the outer shell is pulled down on to the inner shell and the retaining clip 26 engaged the outer shell is firmly located on the inner shell with a gap of approximately 6 mm between them.
Referring to
Also visible in
Provision may instead or in addition be made on the inner helmet for mounting accessories, and though it may not be possible to fit the outer helmet over it when the accessories are in place.
The attachment mechanism 60, comprises two main portions: a U shaped housing 62 and a lever 64, which is pivotally mounted on the housing at A. A torsion spring (not shown) connects the lever 64 to the housing 62 and biases the lever 64 in a direction which would be clockwise as seen in
The lever 64 comprises an upper portion 66 which is generally rectangular, offset from the midline of, and positioned at a slight angle to a lower portion 68 of the lever 64. The upper portion 66 has a top surface 69. A sloping abutment surface 70 connects one side of the two portions. Due to the biasing of the torsion spring this surface is normally in contact with a raised surface 72 of the leg of the attachment mechanism on which the lever is disposed.
The external surface of the leg of the U-shaped housing 62 opposite the lever 64 is glued to an internal surface of the outer helmet 50. The other leg of the housing may be connected to the inner helmet as follows.
A slot 74, which is slightly wider than the leg of the U-shaped housing on which the lever 64 is disposed, is formed in the inner portion 54 of the inner helmet 52. The slot is approximately 25 mm long and formed midway between the front and rear of the helmet, around halfway up the helmet's side. At the rear of the slot 74 is a solid abutment surface 76, which is as deep as the slot and approximately the same width as the top surface of the lever 64.
To connect the helmets the user inserts the lever 64 into the slot, and pulls the outer helmet 50 in a generally downward direction.
If the user should wish to disengage the helmets, she simply rotates the lower portion of the lever anti-clockwise, so that the top surface of the lever is aligned with the slot 74, as shown in
A second attachment mechanism (not shown) is disposed opposite the first attachment mechanism and is its mirror image, being appropriately biased. Both levers must be engaged or disengaged when donning or doffing the helmet.
Some other features of the attachment mechanism 60 are shown in
Each feature disclosed in this specification (which term includes the claims) and/or shown in the drawings may be incorporated in the invention independently of other disclosed and/or illustrated features. Statements in this specification of the “objects of the invention” relate to preferred embodiments of the invention, but not necessarily to all embodiments of the invention falling within the claims. The description of the invention with reference to the drawings is by way of example only.
The text of the abstract filed herewith is hereby deemed to be repeated here in full as part of the specification.
A firefighter's helmet comprises an inner protective shell configured to be worn on its own as a helmet and an outer protective shell configured to be fitted over the inner shell and releasably retained thereon, comprising retaining mechanism for retaining the inner shell in the outer shell, wherein the retaining mechanism is moveable by a user whilst wearing the inner shell between a first position in which the retaining mechanism engages a said shell substantially to prevent relative movement between the two shells; and a second position in which the retaining mechanism permits relative movement of the shells whereby allowing the donning or doffing of the outer shell by the user.
Publish
Claims
1-15. (canceled)
16. A firefighter's helmet comprising an inner protective shell having an outer layer of impact-resisting plastics and an inner-impact-resisting layer, the inner shell being wearable on its own when the user is attending an incident other than a structural fire, and an outer shell adapted to fit over the inner shell and to be retained thereon, the outer shell being more extensive that the inner shell so as to protect the user against structural firefighting risks, and being configured to be fitted to and removed from the inner shell by the user whilst wearing the inner shell.
17. A firefighter's helmet comprising an inner protective shell configured to be worn on its own as a helmet and an outer protective shell configured to be fitted over the inner shell and releasably retained thereon, comprising retaining mechanism for retaining the inner shell in the outer shell, wherein the retaining mechanism is moveable by a user whilst wearing the inner shell between a first position in which the retaining mechanism engages a said shell substantially to prevent relative movement between the two shells; and a second position in which the retaining mechanism permits relative movement of the shells whereby allowing the donning or doffing of the outer shell by the user.
18. A helmet as claimed in claim 16, wherein the outer shell has an outwardly extending brim or cape.
19. A helmet according to claim 16, comprising a spacer for spacing the outer shell from the inner shell.
20. A helmet according to claim 16, comprising a visor which is accommodated between the inner and outer shells when not in use.
21. A helmet according to claim 17, wherein the retaining mechanism is resiliently biased towards the first position.
22. A helmet according to claim 21, wherein the retaining mechanism is moveable by a user whilst wearing the inner shell in order to move it from the first to the second position.
23. A helmet according to claim 17, wherein the retaining mechanism is pivotally connected to the helmet.
24. A helmet according to claim 17, wherein the retaining mechanism is disposed on the outer shell.
25. A helmet according to claim 24, wherein the retaining mechanism engages a lower edge of the inner shell.
26. A helmet according to claim 23, wherein the retaining mechanism is pivotally mounted on an attachment mechanism which is connected to the outer shell, the retaining mechanism thereby being spaced from the outer shell.
27. A helmet according to claim 26, wherein the inner helmet comprises a slot, which is engageable by the attachment mechanism such that when the retaining mechanism is in the second position the attachment mechanism can be moved through the slot whilst when the retaining mechanism is in the first position the attachment mechanism cannot be moved through the slot.
28. A helmet according to claim 27, wherein the retaining mechanism engages a lower edge of the slot when in the first position.
29. A helmet according to claim 26, wherein the attachment mechanism comprises a mounting for an accessory to the helmet.
30. A helmet according to claim 27, wherein the attachment mechanism comprises a mounting for an accessory to the helmet.
31. A helmet according to claim 28, wherein the attachment mechanism comprises a mounting for an accessory to the helmet.
32. A helmet according to claim 16, comprising a mounting for attaching at least one accessory to the helmet.
33. A method of protecting a firefighter comprising providing the firefighter with a helmet comprising an inner protective shell wearable on its own and an outer protective shell adapted to fit over and to be retained on the inner shell and causing the firefighter to wear the inner shell or both shells depending on the nature of the risk presented by the incident which the firefighter is attending.
34. A method according to claim 33, wherein the firefighter dons or doffs the outer shell whilst wearing the inner shell.
Type: Application
Filed: Oct 7, 2004
Publication Date: Mar 15, 2007
Inventor: Peter Smith (Luton Bedfordshire)
Application Number: 10/575,559
International Classification: A42B 3/00 (20060101);