GB2024927A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Lockable pivots
Assignee: Allard Way Holdings Ltd
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Filing: 1979-07-06
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Granted: —
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Expires: 1999-07-06
Abstract
Abstract A latch mechanism for controlling relative movement of two hinged members about a pivot axis X, e.g. a helmet and visor comprises a first part (19) fixed to one hinged member and a second part comprising a first member (25) fixed to the other hinged member (13) and, mounted on the first member, a manually operable second member (27). On application of pressure in a direction about the axis the second member (27) pivots at 49A or 49B on the first member (25) against a spring bias (43) to disengage the second member from the first part (19) and allow the second latch part (25, 27) to move angularly with respect to the first latch part (19) under continuing pressure on the second member. <IMAGE>
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-30 12:40
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/18; A42B3/22; A42B3/228; E; E05; E05D; E05D11/00; E05D11/10; E05D11/1007
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
212 words
A latch mechanism for controlling the relative movement of two hinged members about an axis comprising: a first part fixed, or adapted to be fixed, to one of the two hinged members; a second part comprising a first member fixed, or adapted to be fixed, to the other of said two hinged members, and a manually operable second
member having two spaced portions adapted to contact spaced reaction surfaces on said first
member; and a spring arrangement which biasses
said spaced portions and reaction surfaces
towards contact with one another; the second
member having a surface which engages a surface
of the first latch part under the action of the spring
arrangement, and the arrangement being such that pressure applied to the manually operable
second member of the second latch part is reacted
at one or other of the reaction surfaces accordingly as the applied pressure acts in a sense clockwise or counter-clockwise about the hinge axis to cause said second member to pivot against the bias of the spring arrangement about one or the other of its spaced portions with the result that the engaged surfaces are disengaged and under continuing pressure at its second member the said second latch part moves angularly with respect to the said first latch part.
Claim 2
Dependent Claim
212 words
A latch mechanism for controlling the relative movement of two hinged members about an axis comprising: a first part fixed, or adapted to be fixed, to one of the two hinged members; a second part comprising a first member fixed, or adapted to be fixed, to the other of said two hinged members, and a manually operable second
member having two spaced portions adapted to contact spaced reaction surfaces on said first
member; and a spring arrangement which biasses
said spaced portions and reaction surfaces
towards contact with one another; the second
member having a surface which engages a surface
of the first latch part under the action of the spring
arrangement, and the arrangement being such that pressure applied to the manually operable
second member of the second latch part is reacted
at one or other of the reaction surfaces accordingly as the applied pressure acts in a sense clockwise or counter-clockwise about the hinge axis to cause said second member to pivot against the bias of the spring arrangement about one or the other of its spaced portions with the result that the engaged surfaces are disengaged and under continuing pressure at its second member the said second latch part moves angularly with respect to the said first latch part.
Claim 3
Dependent Claim
28 words
A latch mechanism according to Claim 1 wherein the engageable surfaces of the first latch part and the second member of the second latch part are toothed surfaces.
Claim 4
Dependent Claim
84 words
A latch mechanism according to Claim 1 or
Claim 2 wherein said first member of the second latch part comprises a planar lever the outside edges of which provide said spaced reaction surfaces, and the second member of the second latch part comprises two plates lying on opposite sides of the planar lever, at least one of which plates has projections which constitute said spaced portions on the second member and provide a gap between the two plates through which said planar member extends.
Claim 5
Dependent Claim
63 words
A latch mechanism according to Claim 3 wherein said spaced reaction surfaces are provided by the outside edges of the two limbs of a forked portion of said lever and said spring arrangement comprises a spring disposed between the two limbs and anchored at one end to the lever and at the other end to the second member of the second latch member.
Claim 6
Dependent Claim
28 words
A latch mechanism according to Claim 4 wherein at said second member the spring is anchored by a fixing member which serves to secure the two plates together.
Claim 7
Dependent Claim
13 words
A latch mechanism substantially as hereinbefore described with reference to the accompanying drawings.
Claim 8
Dependent Claim
13 words
A latch mechanism substantially as hereinbefore described with reference to the accompanying drawings.
Claim 9
Dependent Claim
25 words
A helmet having a visor hinged thereto and a latch mechanism according to any preceding claim for controlling relative movement of the visor and helmet
Claim 10
Dependent Claim
39 words
A unit comprising a visor and a latch mechanism according to any one of Claims 1 to 6 adapted for mounting on a helmet, the visor being secured to said first member of the second part of the mechanism.
References Cited (Backward Citations)
No citation records indexed.
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