Stahr
Frederick Roland Stahr, Seattle, WA US
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20110297071 | Underwater Vehicle Bouyancy System - A multiple stage buoyancy changing system, or variable buoyancy device, for an underwater vehicle. The multiple stage buoyancy changing system comprises: a pressure hull containing a flexibly-sized internal fluid reservoir; a flexibly-sized external fluid reservoir attached to the pressure hull and connected to the internal reservoir; a system of devices and channels configured to move fluid between the internal fluid reservoir and the external fluid reservoir to change a displaced volume of the vehicle. Each stage of the variable buoyancy device can be optimized for maximum energy efficiency while changing the vehicle's displaced volume within an ambient pressure range. A control system for the variable buoyancy device engages different stages depending on ambient external pressure such that maximum energy efficiency is achieved over a large range of pressures/depths. | 12-08-2011 |
20120318188 | Autonomous Underwater Vehicle - Multi-stage buoyancy changing system for an autonomous underwater vehicle comprises: an internal reservoir configured to hold a fluid; an external bladder connected to the internal reservoir and configured to exchange fluid with the internal reservoir via one or more channels; a first device configured to move fluid through a channel from the internal reservoir to the external bladder at an optimized efficiency for an ambient pressure of a first segment of a dive profile to increase apparent displacement and buoyancy of the vehicle; and a second device configured to move fluid through a channel from the internal reservoir to the external bladder at an optimized efficiency for an ambient pressure of a second segment of the dive profile to increase an apparent displacement and a buoyancy of the vehicle. The first segment of the dive profile includes a different ambient pressure range than the second segment of the dive profile. | 12-20-2012 |
20130239870 | Underwater Vehicle Bouyancy System - A multiple stage buoyancy changing system, or variable buoyancy device, for an underwater vehicle. The multiple stage buoyancy changing system comprises: a pressure hull containing a flexibly-sized internal fluid reservoir; a flexibly-sized external fluid reservoir attached to the pressure hull and connected to the internal reservoir; a system of devices and channels configured to move fluid between the internal fluid reservoir and the external fluid reservoir to change a displaced volume of the vehicle. Each stage of the variable buoyancy device can be optimized for maximum energy efficiency while changing the vehicle's displaced volume within an ambient pressure range. A control system for the variable buoyancy device engages different stages depending on ambient external pressure such that maximum energy efficiency is achieved over a large range of pressures/depths. | 09-19-2013 |
Hannes Stahr, St. Lorenzen AU
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20140050442 | OPTICAL COUPLING SYSTEM FOR TWO OPTICAL WAVEGUIDES - An optical coupling system for coupling a first optical waveguide having a first core surrounded by a first sheath to a second optical waveguide having a second core surrounded by a second sheath. An end face of the first core of the first optical waveguide abuts an end face of the second core of the second optical waveguide at a coupling location and the second core is flush with the first core in the axial direction, wherein, in the region of the coupling location, over at least part of a predetermined axial portion, both the second sheath of the second optical waveguide and the first sheath of the first optical waveguide together form a cladding of the optical waveguide in the predetermined portion. | 02-20-2014 |
Johanees Stahr, Bruck An Der Mur AT
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20110135248 | PRINTED CIRCUIT BOARD ELEMENT AND METHOD FOR THE PRODUCTION THEREOF - The invention relates to a printed circuit board element ( | 06-09-2011 |
Richard E. Stahr, Elgin, IL US
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20120125711 | SOUND ABSORBING PANEL AND SYSTEM - Disclosed are a sound absorbing panels and a sound absorbing system using such panels, particularly for use in reducing highway and railway noise. The panel includes an enclosure including a first panel face with a number of apertures or holes to allow sound passage, where the ratio of the area of the apertures to the total area of the first panel face is set at a predetermined percentage. The enclosure is configured such that an inner surface of the first panel face is proximate to a fibrous sound absorbing material with an area approximately equal to the total area of the first panel face. The panel enclosure may have various shapes and configurations for optimal sound absorption, and may be configured in a sound absorbing system such that one or more of the panels are mountable to existing structures, such as sound barrier walls in a retrofit manner. | 05-24-2012 |