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  Structure of a mask having a mask arcUSPTO Application #: 20060010550Title: Structure of a mask having a mask arc Abstract: A mask having a mask arc and a mask body is disclosed. The mask arc includes a lower arc and an elastic strip, the two side ends of the lower arc are mounted with the elastic strip and an engaging slot is located between the side ends and the external sides of the two ends of the lower arc are provided with a protruded seat and the surface of the protruded seat has radially distributed protruded strips and a through hole is formed on the center of the protruded seat; the mask is formed as one unit and the upper edge of the mask is horizontally extended to form a blocking plate and the two ends of the inner side of the mask at the upper side are provided with the protruded block corresponding to the protruded seat at the lower arc, and the surface of the protruded block is provided with radially arranged recess and the center of the protruded block is provided with a through opening. (end of abstract) Agent: Leong C Lei - Walnut Creek, CA, US Inventor: Chen-San Cheng USPTO Applicaton #: 20060010550 - Class: 002009000 (USPTO) Related Patent Categories: Apparel, Guard Or Protector, For Wearer's Head, Face The Patent Description & Claims data below is from USPTO Patent Application 20060010550. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] (a) Technical Field of the Invention [0002] The present invention relates to a combination structure of a mask body. [0003] (b) Description of the Prior Art [0004] A safety helmet for use in welding operation is mounted with a mask. At the two lateral sides of the mask 10 and the working helmet 20 are through holes, and a rotating button 30 passes through the holes and is fastened with a screw nut so that a pivot connection is obtained (FIG. 1). In order to have a bigger masking area, the front portion of the mask 10 is connected to an arch-shaped extension 101. In practice, this extension 101 does not contribute any usefulness in the course of a welding operation. The mask 10 is provided at the rear portion of the head, as shown in FIG. 2, and therefore both of the hands have to unscrew the button 30 and then, lift the extension 101. After the welding process, the extension 101 has to be restored with both hands and the button 30 is tightened. However, in the course of welding, the working helmet 20 has to be taken down and the mask 10 has to be aligned with the mounting position, as shown in FIG. 3. If the user needs to lift up the mask 10 while welding, the processes of loosening the button, and tightening the button 30 are repeating. The repeating process will cause the mask 10 to disconnect from the working helmet 20 after a period of use. The drawbacks of the structure are as follows: [0005] (1) When the mask is not used in welding operation, it is positioned at the rear portion of the head. The bottom end of the mask may hook onto the neck of the wearer (shown in FIG. 2). If the mask is lifted upward, the weight at the rear portion of the head is heavy. This is uncomfortable to the wearer. [0006] (2) In the course of welding operation, it is laborious to mount the mask and to disconnect after use. This is very inconvenient to the user (FIG. 3). [0007] (3) The lens of the mask is too close to the mouth and noise of the wearer, fog may occur at the lens, and therefore, the cleaning of the lens is needed. This is again laborious and inconvenient. [0008] (4) The complicated structure causes an increase in production cost. [0009] (5) Through holes have to be provided to the working helmet. Therefore, the mask is not applicable to all types of helmets. [0010] (6) The uplifting and lowering of the mask together with the adjustment of nut is not convenient. [0011] In view of the above drawbacks, the present invention provides a structure of a mask having a mask arc. SUMMARY OF THE INVENTION [0012] Accordingly, it is an object of the present invention to provide a mask having a mask arc characterized in that the mask arc includes a lower arc and an elastic strip, the two side ends of the lower arc are mounted with the elastic strip and an engaging slot is located between the side ends and the external sides of the two ends of the lower arc are provided with a protruded seat and the surface of the protruded seat is radially distributed protruded strips and a through hole is formed on the center of the protruded seat; the mask is formed as one unit and the upper edge of the mask is horizontally extended to form a blocking plate and the two ends of the inner side of the mask at the upper side are provided with the protruded block corresponding to the protruded seat at the lower arc, and the surface of the protruded block is provided with radially arranged recess and the center of the protruded block is provided with a through opening. [0013] Yet another object of the present invention is to provide a structure of a mask having a mask arc, wherein the mask arc and the mask body are respectively connected by the protruded seat and the protruded block and the radially arranged protruded stripes are engaged with the recess, and a rivet is used to pass through the through hole and the through opening so that the rivet is used as a pivot shaft which allows a turning. [0014] Still another object of the present invention is to provide a structure of a mask having a mask arc, wherein the mask body is provided with a window and the external side of the window is a rotating window cover. [0015] The foregoing object and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts. [0016] Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example. BRIEF DESCRIPTION OF THE DRAWINGS [0017] FIG. 1 is a perspective view of a conventional mask. [0018] FIG. 2 is a schematic view showing a conventional mask being worn prior to a welding operation. [0019] FIG. 3 is a schematic view showing a conventional mask being worn in the course of a welding operation. [0020] FIG. 4 is an exploded perspective view of a second conventional mask with a mask arc. [0021] FIG. 5 is a perspective view of FIG. 4. [0022] FIG. 6 is an elevation view of FIG. 5. [0023] FIG. 7 is an exploded perspective view of a third conventional mask with a mask arc. [0024] FIG. 8 is a perspective view of FIG. 7. [0025] FIG. 9 is an elevational view of FIG. 8. [0026] FIG. 10 is a perspective exploded view of the mask with a mask arc in accordance with the present invention. [0027] FIG. 11 is an elevational view showing the lifting of the window mask of the mask of the present invention. Continue reading... Full patent description for Structure of a mask having a mask arc Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Structure of a mask having a mask arc patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Structure of a mask having a mask arc or other areas of interest. ### Previous Patent Application: Next Patent Application: Welding face covering Industry Class: Apparel ### FreshPatents.com Support Thank you for viewing the Structure of a mask having a mask arc patent info. IP-related news and info Results in 4.44951 seconds Other interesting Feshpatents.com categories: Accenture , Agouron Pharmaceuticals , Amgen , AT&T , Bausch & Lomb , Callaway Golf |
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