Nec Corporation

Ebara Corporation

Takao Takeuchi

Masao Matsumura

Hiroshi Suzuki

Toshio Suzuki

Hiroshi Nagano

Seigo Katsuta

Tadahiko Kishikawa

Takehiko Yamaguchi

Susumu Iwasaki

A self-contained liquefied gas supply system has a tank for storing a liquefied gas, a primary pump for delivering the liquefied gas from the tank, a secondary pump for pressurizing the liquefied gas delivered from the primary pump, a vaporizer for vaporizing the liquefied gas discharged from the secondary pump into a vaporized gas, an expander for actuating the secondary pump with the vaporized gas produced by the vaporizer, and a back-pressure line connected to an outlet of the expander. A bypass pipe is connected between the primary pump and the vaporizer in bypassing relation to the secondary pump for supplying the liquefied gas from the primary pump to the vaporizer. A joint line is connected between the back-pressure line and a substantially atmospheric pressure line, the joint line having a first flow regulating valve for regulating a rate of flow of a gas from the back-pressure line to the substantially atmospheric pressure line. A bypass line is connected between the vaporizer and the back-pressure line in bypassing relation to the expander, the bypass line having a second flow regulating mechanism for regulating a rate of flow of the vaporized gas from the vaporizer to the back-pressure line. For starting the secondary pump, the liquefied gas is delivered from the primary pump through the bypass pipe to the vaporizer, which produces a vaporized gas supplied to the expander.

Liquefied gas supply system

A turboexpander pump unit has a vertical or horizontal shaft, a pump connected to an end of the shaft for pressurizing a liquid fluid to a pressure higher than a predetermined delivery pressure, a heat exchanger for heating and converting the liquid fluid pressurized by the pump into a high-pressure gas, and an expander turbine connected to an opposite end of the shaft and actuatable by a thermal energy reduction produced when the high-pressure gas from the heat exchanger is lowered to the predetermined delivery pressure, for delivering the liquid fluid continuously under a predetermined pressure to an external installation. The pump having at least two outlet ports for discharging the liquid fluid at respective different pressures. One of the two outlet ports is connected to the heat exchanger, and the other to a liquid delivery line.

Turboexpander pump unit

A packet switch for high-speed synchronous multiplexing of voice and picture communications collectively. The packet switch uses among other things an input multiplexer, and output demultiplexer, and a single buffer memory divided into memory areas connected to multiple input and output lines. The subdivided buffer is controlled by counters rather than a more complicated address exchanger. A second embodiment eliminates the need for an output demultiplexer because of individual read/write control of the buffer units. A third embodiment includes a bidirectional bus between an input buffer and an output buffer. A fourth embodiment uses a more economical unidirectional bus. The unidirectional bus can be limited to a part of an input packet to permit Large Scale Integration (LSI). In the LSI configuration, address filters may be replaced with a centralized address controller, and the buffer can consist of FiFo memory units or RAM units.

Packet switch suitable for integrated circuit implementation

In an integrated circuit/packet switching network comprising a plurality of nodes and one or more common access loops for inter-node network, an integrated circuit/packet switching system comprises a fixed time cycle frame format allotted to the loop or loops. Each of the nodes functions in accordance with the frame format to assemble one or more composite packets for each destination node from a plurality of circuit- and packet-switched calls designated to said each destination node and to send the assembled composite packet or packets on the loop or loops for each frame cycle time. Each node also functions in accordance with the frame format to extract self-designated composite packets among composite packets on the loop or loops and to disassemble the extracted composite packets into the constituent circuit- and packet-switched calls.

Growing community of inventors

Tokyo, Japan

Takao Takeuchi