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 Title: |
US4133308:
Protective devices
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Lowe, Brian A.; Cheshunt, United Kingdom
Odell, Raymond; Potters Bar, United Kingdom
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| Assignee: |
Racal-Amplivox Communications Ltd., Middlesex, United Kingdom
other patents from RACAL-AMPLIVOX COMMUNICATIONS LTD. (461810) (approx. 3)
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| Published / Filed: |
1979-01-09
/ 1977-02-24
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| Application Number: |
US1977000771781
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| IPC Code: |
Advanced:
A42B 3/00;
A42B 3/18;
A42B 3/22;
A42B 3/28;
A62B 18/04;
Core:
A42B 3/04;
A62B 18/00;
more...
IPC-7:
A62B 18/00;
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| ECLA Code: |
A42B3/28E; A42B3/22C; A62B18/04A;
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| U.S. Class: |
Current:
128/201.25;
002/171.3;
Original:
128/145.R;
128/142.7;
002/171.3;
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| Field of Search: |
128/145 R,141 R,142.7,139,146.7
002/171.3,410,416,417,421,418,414,6
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| Priority Number: |
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| Abstract: |
An improved anti-dust helmet comprising a shell spaced from the wearer's head by a supporting harness and provided with a transparent visor sealed at the sides to the wearer's face. Between the helmet shell and the wearer's head there is a sealing member extending continuously from the visor seals around the upper occipital part of the wearer's head. The sealing member is formed of a soft and resilient material and is so formed that the edge of the sealing member that rests against the wearer's head approaches the head at an acute angle. The sealing member may be fabricated or moulded from natural or synthetic rubber or from other elastomeric materials.
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| Attorney, Agent or Firm: |
Laubscher, Lawrence E. ;
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| Primary / Asst. Examiners: |
Recla, Henry J.;
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Family: |
Show 21 known family members
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First Claim:
Show all 5 claims |
What is claimed is:
1. An improved anti-dust helmet including a hollow helmet shell member having inner and outer surfaces, said helmet shell member containing a lower open portion for receiving a user's head, and an open front viewing portion; air circulation means arranged within the rear portion of said helmet shell member for directing air forwardly of the helmet; supporting harness means connected within the helmet shell member for spacing the inner surface thereof from the user's head; transparent visor means mounted across the helmet open front viewing portion, said visor means being connected at its upper edge portion with said helmet shell member and being adapted at its side edges for sealing engagement with the user's face;
- the improvement which comprises sealing means for sealing the space between the occipital portion of the user's head and the inner surface of said helmet shell member, said sealing means including a soft resilient generally U-shaped member having an outer peripheral surface in sealed engagement with the inner surface of the helmet shell member, a deformably generally planar web portion extending radially inwardly from said outer peripheral surface, and an inner peripheral surface adapted for sealing engagement with the occipital portion of the user's head, said sealing member containing an air circulation opening in fluidic communication with said air circulation means, whereby air from said circulation means passes through said opening forwardly of the helmet.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 16 U.S. patent(s) that reference this one
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