Patent ID: 6886562

Claim:
In an oxygen breathing apparatus having a plurality of tubular frame members, the tubular frame members comprising first and second end piece members and first and second temple members, the end piece members and the temple members each having a first end and a second end, with the first end of at least one of the temple members in air communication with an oxygen supply and the first end of at least one of the end piece members in air communication with a nostril cannula, the second end of the first temple member rotatably hinged relative to the second end of the first end piece member and moveable between a first position and a second position, and the second end of the second temple member rotatably hinged relative to the second end of the second end piece member and moveable between a first position and a second position, the improvement comprising: a. a thick walled connection portion disposed at the second end of each end piece member and each temple member, each of said thick walled portions comprising a contact end surface; b. said thick walled connection portion of at least one of said end piece members also comprising a convex portion, and said thick walled connection portion of at least one of said temple members also comprising a concave portion; c. wherein, when said second end of each temple member is moved from the first position to the second position relative to said end piece members, the contact end surface of each of said temple members engage the contact end surface of said each of said first end piece members to form a first and second common joint portion, and the convex portion of said at least one end piece member is inserted into the concave portion of said at least one temple member to form a hermetic seal and establish air communication between said at least one end piece member and said at least one temple member and said first and second common joint portions are prevented from being damaged during use.