Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
167 words
A protective helmet comprising an outer helmet shell, a lining (10) of impact resistant material within said shell, a cradle (24,26,28) of webbing extending within and fastened to said lining and an adjustable headband (42) secured to said lining, characterised in that said headband comprises a rear headband member (46) extending adjacent a lower edge (20) along opposite sides (16) and adjacent the rear (14) of said lining, said rear headband member being anchored at opposite ends (52) respectively at forwardly disposed locations of said lining and a front headband member (44) pivotally carried at opposite ends (60) respectively on said rear headband member at opposite sides of said lining whereby said front headband member can be rotated between a first operative position in which it serves as part of said headband and a second retracted position within said lining in which space is provided at the front of said lining to enable said helmet to be fitted to the head of a user wearing breathing apparatus.
Claim 2
Dependent Claim
26 words
A helmet as claimed in Claim 1, characterised in that retaining means (64,70,72) are provided for securing said front headband member in said retracted position thereof.
Claim 3
Dependent Claim
134 words
A helmet as claimed in Claim 1 or Claim 2, characterised in that said front headband member in said first operative position is secured at or adjacent its mid-length by a strap (65) to an anchorage (66) in the front of the lining above the headband members, said strap having an outer surface (67) disposed in said first operative position against said lining and an inner surface (65) and spaced first and second hinges (74,72) respectively adjacent said anchorage and said front headband member of which said first hinge facilitates folding back of said strap to dispose said inner surface thereof against said lining and said second hinge enables folding of said strap to dispose said front headband part at the location thereof connected to said strap against said outer surface of said strap.
Claim 4
Dependent Claim
39 words
A helmet as claimed in Claim 3, characterised in that said strap is formed in one with said front headband member and said hinges are formed by weakening said strap along respective lines which extend transversely to said strap.
Claim 5
Dependent Claim
32 words
A helmet as claimed in any preceding claim, characterised in that said rear headband member is further anchored at locations (58) on opposite sides of and towards the rear of said lining.
Claim 6
Dependent Claim
52 words
A helmet as claimed in any preceding claim, characterised in that said rear headband part is formed by two band parts (48,50) which at rear ends thereof overlap, there being provided means for adjusting the extent of said overlap to adapt the embrace of the headband to the head of the wearer.
Claim 7
Dependent Claim
154 words
A buckle characterised by a body (80), a first path (92) in said body in which a first band part (50) is fixedly securable and a second path (94) in said body disposed alongside said first path and with said paths in overlying relationship and in which a second band part (48) formed with a row of spaced apart perforations (100) can extend, said body being formed with an abutment (102) which projects into said second path and which, in operation, is engaged in one of said perforations, said body being capable of being flexed to dispose said paths into parallel arcuate form of curvature sufficient to release said abutment from said band perforation in which it is engaged, whereby the band part (48) in said second path can be moved longitudinally relatively to said buckle and said buckle can subsequently be released to enable engagement of said abutment with another of said perforations.
Claim 8
Dependent Claim
120 words
The buckle as claimed in Claim 7, characterised in that said abutment is formed with a first surface (104) perpendicular to the direction of relative movement of the buckle and the band in said second path and a second surface (106) which tapers said abutment towards an a perforation engaging end thereof whereby, in operation, on pulling said band part (48) formed with said perforations in one direction, said band part (48) which is pulled flexes said body and moves along said second path to become disengaged from said abutment and be drawn through said second path to a position where on release of said pulled band part re-engagement in another of said perforations by said abutment can the place.
Claim 9
Dependent Claim
43 words
The buckle as claimed in Claim 7 or Claim 8, characterised in that two abutments (102) spaced transverseley with respect to said paths are provided for engagement with apertures (100) of two parallel rows of apertures which extend along said second band part.
Claim 10
Dependent Claim
62 words
The buckle as claimed in any one of Claims 7 to 9, characterised in that said body comprises spaced longitudinal members (86), spaced transverse members (84) formed with respective elongated apertures (88) and a platform (90) which extends between said longitudinal members and between said transverse members and which together with said apertures (88) in said transverse members defines said paths (92,94).
Claim 11
Dependent Claim
23 words
The buckle as claimed in Claim 10, characterised in that said abutment or abutments (102) extend from said platform into said second path.
Claim 12
Dependent Claim
35 words
The buckle as claimed in Claim 10 or Claim 11, characterised in that on a side of said platform defining said first path are provided means for securing an end of said first band part.
Claim 13
Dependent Claim
27 words
The buckle as claimed in any of Claims 7 to 12, characterised in that said buckle is formed as a one piece injection moulding from plastics material.