WO1997030606A1 - A safety visor - Google Patents
A safety visor Download PDFInfo
- Publication number
- WO1997030606A1 WO1997030606A1 PCT/SE1997/000235 SE9700235W WO9730606A1 WO 1997030606 A1 WO1997030606 A1 WO 1997030606A1 SE 9700235 W SE9700235 W SE 9700235W WO 9730606 A1 WO9730606 A1 WO 9730606A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- grill
- visor
- safety visor
- safety
- wires
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/18—Face protection devices
- A42B3/22—Visors
- A42B3/225—Visors with full face protection, e.g. for industrial safety applications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/02—Goggles
Definitions
- the present invention relates to a safety visor which is designed so as to protect a user's face, in particular the eyes, from flying particles such as sawdust, and also pointed objects such as twigs, and which includes a grill with two groups of grill bars or wires, the grill bars or wires in the one group intersecting the gill bars of wires in the second group.
- safety visors are often employed to prevent flying particles such as sawdust from a chain saw from hitting the worker's face, and in particular his eyes.
- the same safety visor also affords protection against impact from pointed objects such as twigs, which could injure the eyes.
- Safety visors of this type are often mounted on a safety helmet or ear protectors and are placed immediately in front of the wearer's face and eyes.
- safety visors of this type suffer from drawbacks, not least including the formation of mist.
- scratches in the material of the visor, dirt or rain drops may cause reflections and give considerable reduction in visibility through the visor.
- Safety visors are also previously known in the art which are manufactured from woven metal wire mesh in which the different wires in the mesh intersect one another. With a suitable wire diameter, wire gauge and design of the apertures in the mesh, a very good safety effect can be attained vis-a ⁇ vis flying particles.
- safety visors produced from wire mesh suffer from the drawback that they manifestly obstruct the view of the wearer, since the wires constitute quite a large proportion of the total surface area of the visor. A certain improvement in light admission, and thereby visibility through such a visor may be obtained by a reduction of the wire diameter, but this improvement must be bought at the cost of poorer stability and mechanical strength.
- visors produced from wire mesh may easily be penetrated by pointed objects such as twigs and the like, since the wires in the mesh slide in relation to one another.
- Visors produced from wire mesh also cause problems such that small gaps are formed in the interstices between wires in the mesh, and these gaps may, because of capillary action, retain relatively large quantities of water in wet weather. Such amounts of water bonded by the wire mesh may have an impeding effect on visibility through the visor, and, in addition, help to dirty the visor.
- Such visors produced from wire mesh may also give rise to problems in counter light situations since the individual wires in the mesh (because of their large surface area and diameter) cause reflections which impede visibility through the visor.
- the present invention has for its object to design the safety visor mentioned by way of introduction such that it obviates the drawbacks inherent in prior art safety visors.
- the present invention has for its object to realise a safety visor which possesses superior mechanical strength, in particular against penetration by pointed objects.
- the present invention also has for its object to realise a safety visor in which the apertures of the grill may be given expedient shape in terms of penetration by randomly oriented particles of irregular shape.
- the present invention yet further has for its object to realise a visor which may create a 'Venetian blind effect" and thereby obviate or at least reduce problems in situations when the wearer is looking into the light.
- the present invention has for its object to realise a safety visor which is simple and economical to manufacture and which affords improved light admission in that the grill included in the visor takes up a minimum proportion of the surface of the visor.
- the safety visor intimated by way of introduction is characterized in that the safety visor is made of expanded metal.
- Fig. 1 shows a small section of a safety visor produced according to the present invention
- Fig. 2 shows a modified form of a safety visor according to the present invention.
- Fig. 3 is a sectional view illustrating the Venetian blind effect" which is realised employing the embodiment according to Fig. 2.
- the section from a safety visor according to the present invention, illustrated in Fig. 1 comprises a grill network with two groups of mutually intersecting grill bars or wires.
- the one group of grill bars of the grill network 1 carries reference numeral 2
- the second group of grill bars carries reference numeral 3.
- the first group of grill bars 2 is directed from the upper, right-hand corner of the Figure down towards its left-hand lower corner
- the second group of grill bars is directed from the upper, left-hand corner of the Figure down towards its lower, right-hand corner.
- the grill bars in both groups therefore intersect one another at a number of interstices 4 where the mutually converging grill bars are united by being of one piece manufacture.
- the major advantage will hereby be afforded that the grill bars can be given reduced dimensions while retaining stability, because the grill bars in the one group cannot slide in relation to the grill bars in the other group.
- the integral interstices 4 there are no gaps in which water may accumulate by capillary action.
- a grill network of the above described type is produced in that a thin metal plate is provided with a large number of parallel rows of slots longitudinally directed along the rows.
- the slots in one row are located in register with the interval spaces between the slots in adjacent rows.
- the material which is located between adjacent slots is extended simultaneously with the provision of the next row of slots, whereafter the thus slotted plate is drawn out or made planar so that a grill network of generally designated expanded metal is thereby formed.
- the manufacture thus takes place by means of combination of cutting (provision of the slots) and plastic processing (expansion or extension of the material) of a plate metal material.
- the expanded metal is often rolled to a flat state, which is illustrated in Fig. 1.
- the interstices 4 in such a rolled expanded metal will be of a more complicated configuration but may, essentially, be considered as planar and rectangular in cross section.
- the shape of the apertures 5 in the grill network which is shown in Fig. 1 may be described as hexagonal with two, opposing and parallel edges 6.
- the length of these edges corresponds approximately to the length of the interstices 4.
- the other, longer edges 7 of the apertures 5 are pairwise parallel with one another or approximately pairwise parallel with one another and would, if they were extended, form the side edges of a parallelogram or a rhomb.
- the shape of the apertures 5 may also be described as approximating that of a parallelogram or possibly that of a rhomb.
- the apertures 5 in the grill network 1 have two axes which are at right angles in relation to one another, namely a major axis 8 and a minor axis 9.
- the relationship between the length of the major axis and the length of the minor axis is of the order of magnitude of 1-3.5, in which the relationship 1 would imply that the apertures 5 are square in shape (in this instance the square being considered as a special case of the rhomb).
- Fig. 2 shows an alternative embodiment of the subject matter of the present invention.
- the grill network 1 has not been rolled flat but instead the grill bars 2 and 3 included in the grill network remain in those positions which they assumed on manufacture.
- This entails that, in the small section of the grill network which is shown in Fig. 2, those end surfaces 10 which have been realised by cutting the grill network through the interstices 4 at the right-hand edge of the section will be obliquely inclined in relation to the plane of extent 11 and 14 of the grill network, where reference numeral 11 relates to the inside of the visor while reference numeral 14 relates to its outside.
- the thickness of the grill network is intimated at right angles to the plane of extent 11 and 14 by the line 12. It should be observed that each sectional surface through any optional interstice 4 parallel with any of the illustrated end surfaces 10 will have the same size, configuration and orientation as that end surface.
- the left-hand section of Fig. 2 shows the end surfaces 13 of the grill bars 2 and 3 which have been cut on making the small section according to Fig. 2. It will be clearly apparent that these end surface 13 are obliquely inclined in relation to the plane of extent 11 and 14 of the grill network in approximately the same manner as the end surfaces 10. It will further be apparent from the left-hand section of Fig. 2 that the end surfaces 13 are located approximately centrally in the thickness 12 of the grill network, since these surfaces are approximately located at the centre points of the grill bars 2 and 3 and the grill bars alternately extend from the inside 11 of the visor to its outside 14. It should here also be observed that each cut surface through any optional grill bar 2 or 3 parallel with any of the end surfaces 13 will have the same size, shape and orientation as that end surface.
- the grill bars 2 and 3 and also the interstices 4 have substantially rectangular cross section corresponding to the end surfaces 10 and 13.
- the cross sections have longer edge lines 15 and 16, as well as shorter edges lines 17 and 18, respectively.
- the longitudinal direction of the cross sections and thereby the long edge lines 15 and 16 make an acute angle with the plane of extent 11 of the visor.
- maximum light admission will be achieved for light rays 20 which enter approximately 20° from beneath towards the eye 19. This corresponds to viewing at relatively short range.
- the grill network 1 only blocks out approximately 19 per cent of the impinging light, since the distance a-b is approximately 19 per cent of the distance a-c.
- the proportion blocked out will increase. At an angle of impingement of approximately 40° (see the light ray 24), the proportion blocked out will be approximately 67 per cent.
- a light ray 24 which impinges from approximately 40° from above is reflected by the surfaces 15 of the grill bars.
- light rays which impinge steeply from above will be reflected if they impinge upon the defining surfaces 15 of the grill bars.
- reflected light as passes through the visor will in practice be negligible, since the grill bars have a surface coating (for example black matte) which both absorbs light and dissipates on reflection.
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vehicle Step Arrangements And Article Storage (AREA)
- Blinds (AREA)
- Helmets And Other Head Coverings (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO983682A NO983682L (en) | 1996-02-21 | 1998-08-12 | security Guard |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9600642-4 | 1996-02-21 | ||
SE9600642A SE506057C2 (en) | 1996-02-21 | 1996-02-21 | Protective Visor |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997030606A1 true WO1997030606A1 (en) | 1997-08-28 |
Family
ID=20401478
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1997/000235 WO1997030606A1 (en) | 1996-02-21 | 1997-02-14 | A safety visor |
Country Status (4)
Country | Link |
---|---|
CA (1) | CA2247181A1 (en) |
NO (1) | NO983682L (en) |
SE (1) | SE506057C2 (en) |
WO (1) | WO1997030606A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1152844A1 (en) * | 1998-12-24 | 2001-11-14 | Precision Combustion, Inc. | Structure for and method of manufacturing aerodynamic expanded metal |
US6832393B2 (en) * | 1999-05-11 | 2004-12-21 | Peltor Ab | Safety visor |
EP1974625A1 (en) * | 2007-03-30 | 2008-10-01 | Nike Bauer Hockey Inc. | Face guard for a hockey helmet |
WO2010140966A1 (en) * | 2009-06-02 | 2010-12-09 | Ab Kompositprodukter | Visor and method for use in the production of such a visor |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4826344A (en) * | 1988-02-17 | 1989-05-02 | Harry Major Machine And Tool Co. | Corner plate for access panel |
US4831665A (en) * | 1986-07-03 | 1989-05-23 | Anderzon Invest Ab | Protective face visor of a filament mesh |
-
1996
- 1996-02-21 SE SE9600642A patent/SE506057C2/en not_active IP Right Cessation
-
1997
- 1997-02-14 CA CA 2247181 patent/CA2247181A1/en not_active Abandoned
- 1997-02-14 WO PCT/SE1997/000235 patent/WO1997030606A1/en not_active Application Discontinuation
-
1998
- 1998-08-12 NO NO983682A patent/NO983682L/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4831665A (en) * | 1986-07-03 | 1989-05-23 | Anderzon Invest Ab | Protective face visor of a filament mesh |
US4826344A (en) * | 1988-02-17 | 1989-05-02 | Harry Major Machine And Tool Co. | Corner plate for access panel |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1152844A1 (en) * | 1998-12-24 | 2001-11-14 | Precision Combustion, Inc. | Structure for and method of manufacturing aerodynamic expanded metal |
EP1152844A4 (en) * | 1998-12-24 | 2004-05-06 | Precision Combustion Inc | Structure for and method of manufacturing aerodynamic expanded metal |
US6832393B2 (en) * | 1999-05-11 | 2004-12-21 | Peltor Ab | Safety visor |
EP1974625A1 (en) * | 2007-03-30 | 2008-10-01 | Nike Bauer Hockey Inc. | Face guard for a hockey helmet |
WO2010140966A1 (en) * | 2009-06-02 | 2010-12-09 | Ab Kompositprodukter | Visor and method for use in the production of such a visor |
US9265659B2 (en) | 2009-06-02 | 2016-02-23 | Ab Kompositprodukter | Expanded metal and process of making the same |
EP2437628A4 (en) * | 2009-06-02 | 2017-11-08 | AB Kompositprodukter | Visor and method for use in the production of such a visor |
Also Published As
Publication number | Publication date |
---|---|
SE9600642D0 (en) | 1996-02-21 |
SE9600642L (en) | 1997-08-22 |
NO983682L (en) | 1998-10-19 |
NO983682D0 (en) | 1998-08-12 |
SE506057C2 (en) | 1997-11-03 |
CA2247181A1 (en) | 1997-08-28 |
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