Abstract: A mobility walker comprising a pair of rear legs and a pair of front legs, each configured to support the mobility walker on the ground. The mobility walker further comprises a transverse handle extending laterally across a width of the mobility walker. The transverse handle is configured to be grasped by a user when operating the mobility walker. At least sixty percent of the length of each of the front legs is formed with a concave curvature, as viewed from a front of the mobility walker.

Abstract: A mobility walker comprising a pair of rear legs and a pair of front legs, each configured to support the mobility walker on the ground. The mobility walker further comprises a transverse handle extending laterally across a width of the mobility walker. The transverse handle is configured to be grasped by a user when operating the mobility walker. At least sixty percent of the length of each of the front legs is formed with a concave curvature, as viewed from a front of the mobility walker.

Abstract: A wheelchair includes left and right side frames and a folding mechanism for connecting the left and right side frames to each other in a folding and unfolding relationship. The folding mechanism includes cross struts rotatably connected to the lower side frame members, hinge links connected to the upper side frame members, and a lock for locking the hinge links together when the folding mechanism is unfolded to form a rigid truss between the left and right upper side frame members.

Abstract: Methods for operating a material dispensing system. The method includes measuring numerical values of an operating parameter, such as line velocity, material pressure, or material temperature, of the dispensing system to predict a future numerical value of the operating parameter. The predicted numerical value of the operating parameter is used to accurately define a start time, which is measured from the detection of the presence of a workpiece being transported past an applicator of the dispensing system, at which to initiate dispensing of the material from the applicator. A calibration procedure is provided for deriving a mathematical relationship used to determine the predicted numerical value of the operating parameter.

Abstract: Methods for operating a material dispensing system. The method includes measuring numerical values of an operating parameter, such as line velocity, material pressure, or material temperature, of the dispensing system to predict a future numerical value of the operating parameter. The predicted numerical value of the operating parameter is used to accurately define a start time, which is measured from the detection of the presence of a workpiece being transported past an applicator of the dispensing system, at which to initiate dispensing of the material from the applicator.

Abstract: Methods for operating a material dispensing system. The method includes measuring numerical values of an operating parameter, such as line velocity, material pressure, or material temperature, of the dispensing system to predict a future numerical value of the operating parameter. The predicted numerical value of the operating parameter is used to accurately define a start time, which is measured from the detection of the presence of a workpiece being transported past an applicator of the dispensing system, at which to initiate dispensing of the material from the applicator. A calibration procedure is provided for deriving a mathematical relationship used to determine the predicted numerical value of the operating parameter.

Abstract: Methods for operating a material dispensing system. The method includes measuring numerical values of an operating parameter, such as line velocity, material pressure, or material temperature, of the dispensing system to predict a future numerical value of the operating parameter. The predicted numerical value of the operating parameter is used to accurately define a start time, which is measured from the detection of the presence of a workpiece being transported past an applicator of the dispensing system, at which to initiate dispensing of the material from the applicator. A calibration procedure is provided for deriving a mathematical relationship used to determine the predicted numerical value of the operating parameter.

Abstract: A portable device for detecting surface outgas contaminants of an article includes: (i) a portable housing that has a chamber which is in communication with a port that is adapted to be sealably attached to a surface of the article; (ii) a mass spectrometer that is coupled to the chamber for analyzing gaseous materials in the chamber; and (iii) means for generating a vacuum within the chamber thereby drawing outgas contaminants from the surface of the article into the chamber for analysis by the mass spectrometer. By performing a mass spectrometric analysis of the surface of interest and comparing the data with mass spectrometric data ascertained with the device from a clean surface, the type and amount of outgas contaminants, if any, can be determined.

Abstract: A portable device for detecting surface outgas contaminants of an article includes: (i) a portable housing that has a chamber which is in communication with a port that is adapted to be sealably attached to a surface of the article; (ii) a mass spectrometer that is coupled to the chamber for analyzing gaseous materials in the chamber; and (iii) means for generating a vacuum within the chamber thereby drawing outgas contaminants from the surface of the article into the chamber for analysis by the mass spectrometer. By performing a mass spectrometric analysis of the surface of interest and comparing the data with mass spectrometric data ascertained with the device from a clean surface, the type and amount of outgas contaminants, if any, can be determined.

Abstract: A string construction for athletic rackets, musical instruments and the like, comprising a thermoplastic core coated with a cationic lubricating agent, and a second coating comprising a thermoplastic resin surrounding and bonded to said first coating.