Abstract: A hammer drill driving bit device for installing an anchor fastener includes a shaft. A first end of the shaft has a first recess extending axially thereinto. The first recess is arcuate and thus is complementary to a head of an anchor fastener, which can be inserted into the first recess. A second end of the shaft is engageable a chuck of a hammer drill so that the shaft is operationally engaged to the hammer drill. The shaft can engage the head of the anchor fastener, such that, with the anchor fastener positioned through a first hole in a first substrate, the hammer drill is positioned to drive the anchor fastener into a second hole in a second substrate. The anchor fastener expands to engage a wall of the second hole to couple the first substrate to the second substrate.

Abstract: A sealing device for positive pressure testing is attached to a respirator face mask and includes an outer frame integrally joined to a movable cap by a flexible link that biases the cap in an open position for the operational use of the face mask against a manually applied force to move the cap to a sealed position for the positive pressure testing to assure the proper fit of the face mask on the wearer. The method for positive pressure testing includes flexibly moving the sealing device from the open position to the sealing position such that the sealing surface of the cap seals the exhalation valve assembly closed. The wearer then exhales into the mask to test the seal of the mask. When the test is completed, the sealing device is released and the inherent biasing force moves the cap from the sealing position to the open position.

Abstract: A sealing device for positive pressure testing is attached to a respirator face mask and includes an outer frame integrally joined to a movable cap by a flexible link that biases the cap in an open position for the operational use of the face mask against a manually applied force to move the cap to a sealed position for the positive pressure testing to assure the proper fit of the face mask on the wearer. The method for positive pressure testing includes flexibly moving the sealing device from the open position to the sealing position such that the sealing surface of the cap seals the exhalation valve assembly closed. The wearer then exhales into the mask to test the seal of the mask. When the test is completed, the sealing device is released and the inherent biasing force moves the cap from the sealing position to the open position.