Abstract: A radiation shielding block for constructing structural walls having flat opposed front and rear surfaces defining a thickness of the block, continuously curved, sinusoidal opposed left and right surfaces and top and bottom surfaces. The continuously curved, sinusoidal surfaces have a regular repeating wavelength pattern having a wave direction that is perpendicular to the flat front and rear surfaces, and a length that is two complete wavelengths of a sinusoidal wave. A plurality of the radiation shielding blocks are stackable in a staggered wythe construction having a plurality of wythes and at least one successive course of blocks set atop a previous course of blocks such that the continuously curved, sinusoidal surfaces of the successive course of blocks engage complementary continuously curved, sinusoidal surfaces of the previous course of blocks, and the successive course of blocks is offset by one wavelength from the previous course in a front-rear direction.

Abstract: A motor driven door assembly is provided, the motor driven door assembly includes a door frame, a motor assembly connected to the door frame and having a motor directly connected to a first portion of a door hinge, and a door connected to the door hinge. The door hinge includes a second portion supported by a bearing assembly that carries substantially all of the door's weight, and the motor directly drives the door hinge to open or close the door.

Abstract: A sliding door assembly is provided comprising a first door having a tortuous leading edge, a door frame, a guide track, and a member having a complementary tortuous edge to that of the door. The drive assembly includes magnets to drive the door between open and closed positions.

Abstract: The present invention is directed to interlocking building block with continuously curved surface profiles suitable for general wall construction, and, when using desireably dense materials, particularly suitable for constructing walls capable of significantly blocking electromagnetic radiation, such as photon, gamma, and neutron radiation.

Abstract: A sliding door assembly is provided comprising a first door having a tortuous leading edge, a door frame, a guide track, and a member having a complementary tortuous edge to that of the door. The drive assembly includes magnets to drive the door between open and closed positions.

Abstract: A rotating entrance assembly is provided, the rotating entrance assembly including a rotating base, a motor in driving connection with the rotating base, and first and second shielding components that are arranged on the rotating base. A passageway is defined between the first and second shielding components.

Abstract: A rotating entrance assembly is provided, the rotating entrance assembly including a rotating base, a motor in driving connection with the rotating base, and first and second shielding components that are arranged on the rotating base. A passageway is defined between the first and second shielding components.

Abstract: A motor driven door assembly is provided, the motor driven door assembly includes a door frame, a motor assembly connected to the door frame and having a motor directly connected to a first portion of a door hinge, and a door connected to the door hinge. The door hinge includes a second portion supported by a bearing assembly that carries substantially all of the door's weight, and the motor directly drives the door hinge to open or close the door.

Abstract: The present invention is directed to interlocking building block with continuously curved surface profiles suitable for general wall construction, and, when using desireably dense materials, particularly suitable for constructing walls capable of significantly blocking electromagnetic radiation, such as photon, gamma, and neutron radiation.