Patent application number | Description | Published |
20080289921 | Shock absorber for switching-device operating device - A shock absorber includes a casing that is filled-in with a working fluid, a cylinder body that is housed in the casing and that forms chambers inside and outside the cylinder body, a sliding shaft that passes through the cylinder body and forms a flow path between the sliding shaft and the cylinder body and engages a movable contact, and a piston that is fixed to the sliding shaft and that is housed inside the cylinder body. An outer diameter of the piston is larger than a diameter of the sliding shaft. The piston can be slid in an inner peripheral surface of the cylinder body while ensuring waterproofing and causes the working fluid to move inside and outside the cylinder body and receives, due to a flow resistance at the time of the working fluid passing through the flow path, a braking force. | 11-27-2008 |
20110247853 | GAS BUSHING - A gas bushing is constructed in such a manner that a center conductor includes: a main electrically-conductive portion having a first outside diameter; and a larger-diameter portion being provided in an upper end portion of the center conductor and having a second outside diameter that is larger than the first outside diameter; and a connection portion connecting the main electrically-conductive portion and the larger-diameter portion together; a lower end of the larger-diameter portion is positioned lower than a lower end of the flange portion, and the lower end of the larger-diameter portion and an upper end of the connection portion are connected together in such a manner that a curvature of an external surface of the center conductor is continuous and that a connecting section has a round shape. | 10-13-2011 |
20110315428 | GAS INSULATED APPARATUS - When electric discharging occurs inside a gas insulated apparatus in which sulfur hexafluoride is filled, hydrogen-fluoride gas is generated, which abrades a part formed of glass fiber reinforced plastics included in the apparatus. Previously, resin for preventing the abrasion has been coated on the surface of the part; however, a problem has occurred that the coating film peels off. Organic fiber woven cloth woven using organic fiber such as aramid fiber or the like having hydrogen fluoride resistance and mechanical toughness is wrapped around the surface of glass fiber reinforced plastics, and thermosetting resin is wettably impregnated into weave patterns of the organic fiber woven cloth and then heat cured; thereby, an abrasion-preventing protection layer that does not peel off is formed. | 12-29-2011 |
20130161288 | GAS CIRCUIT BREAKER - A gas circuit breaker includes: a sealed tank filled with insulation gas; a pair of arc contacts that are arranged to face each other in the sealed tank and connectable and disconnectable with each other; a thermal puffer chamber that is provided on an outer circumferential portion of the pair of arc contacts; a mechanical puffer chamber that is provided on an outer circumference of the thermal puffer chamber and constituted by a cylinder formed in a toric shape centering around an axial line of the arc contacts; and a piston that is formed in a toric shape centering around the axial line and accommodated in the cylinder, and configured to move according to connection and disconnection of the arc contacts. | 06-27-2013 |
20130284703 | GAS CIRCUIT BREAKER - A mechanical-puffer-type arc-extinguishing chamber includes a fixed main contact, a movable main contact that moves on an opening-and-closing axis in a connectable and disconnectable manner to and from the fixed main contact, and a mechanical puffer chamber that is provided in the movable main contact and blows compressed insulation gas to an arc. A thermal-puffer-type arc-extinguishing chamber includes a fixed contact, a movable contact that moves on the opening-and-closing axis in a connectable and disconnectable manner to and from the fixed contact, and a thermal puffer chamber in which compressed insulation gas is blown to the arc. The mechanical-puffer-type arc-extinguishing chamber and the thermal-puffer-type arc-extinguishing chamber are arranged in series on the opening-and-closing axis, and two breaking portions are electrically connected in series. | 10-31-2013 |
20140198429 | MAIN CIRCUIT SWITCHGEAR - There is provided a main circuit switchgear that includes a breaker; a leg part that supports the breaker; a disconnector that is connected to the breaker; a leg part that supports the disconnector; a metal container that accommodates therein the breaker and the disconnector and includes a bottom plate in which an opening is provided at a position corresponding to a position of the leg part, where the leg part is fixed onto the bottom plate, and a support frame that includes a top panel on which the bottom plate is placed and a leg part that supports the top panel, where the leg part is fixed onto the top panel via the opening. | 07-17-2014 |
20140202991 | GAS CIRCUIT BREAKER - An outer peripheral wall surrounds a heating chamber that communicates with an arc chamber through an opening that separates fixed contacts from each other in a circumferential direction. The outer peripheral wall includes a heat-resistive cylindrical heat-flow receiving wall portion that is arranged at a position opposed to the opening in a radial direction, and a cylindrical wall portion that is connected to the heat-flow receiving wall portion in a direction of a center axis and also connected to a fixed-side energizing member at its one end on the opposite side to where the wall portion is connected to the heat-flow receiving wall portion, and is made of an insulating material. With this configuration, the outer peripheral wall surrounding the heating chamber can be protected from damage and heat deterioration due to the influence of hot gas. | 07-24-2014 |
20140360850 | POWER SWITCHGEAR - Each outermost part of fixed-side connection conductors, fixed-side fixed contacts, movable-side fixed contacts, and movable-side connection conductors are placed outside of an outermost diameter of a fixed-side conductor and a movable-side conductor, as viewed from an axis line of the fixed-side conductor and the movable-side conductor as a center. This arrangement provides a power switchgear that can diminish mutual effects of currents among conduction parts to suppress decrease in a current-carrying capacity for each of the conduction parts and to increase a current-carrying capacity for a total of the conduction parts, without increasing the size of the switchgear. | 12-11-2014 |
20150060411 | GAS CIRCUIT BREAKER - Provided are: a hermetically-enclosed tank that is filled with insulating gas; a blocking unit that is provided within the hermetically-enclosed tank and is configured with a movable arc contact and a fixed arc contact opposing each other; a plurality of energizing units, within the hermetically-enclosed tank, that are provided around the blocking unit about its axial line as a center and located away from each other; and a fixed-side auxiliary conductor that is provided between a gas space which stores the energizing units and a gas space on the side of the fixed arc contact. A communication hole is formed on the fixed-side auxiliary conductor so as to communicate the gas space provided between the energizing units with the gas space. | 03-05-2015 |