Abstract: A portable exercise device includes an elongated base sheet and at least one attachment mechanism secured to the elongated base sheet at preselected locations on one side of said base sheet. The at least one attachment mechanism has at least one apparatus to receive an appendage of a user of the device and to provide a mechanism by which to secure a variety of exercise accessories to the base sheet. A retention mechanism for selectively removably connecting the device to a door sufficiently secures the device to the door that it will permit vigorous repeated use of the device without causing the device to inadvertently separate from the door during use and will also permit rapid, facile removal of the device from the door.
Abstract: A solar receiver assembly includes a tube adapted to carry a heat transfer medium and a glass envelope surrounding the tube and having opposed ends. An interface is disposed between each end and the tube so as to seal and support the tube from the envelope. And the receiver includes a prism disposed over the interface to divert incident radiation away from the interface and toward the tube and/or the glass envelope. The prisms may be provided with reflective and/or anti-reflective coatings to further optimize diversion of radiation from the interface.
May 12, 2011
Date of Patent:
November 19, 2013
Lockheed Martin Corporation
Yongdan Hu, Nancy E. Wasson, Matthew M. Kapelanczyk