Ngk Spark Plug Company, Limited

Masanori Suda

Shunsuke Maeda

Takafumi Oshima

Takio Kojima

Yoshihiko Kohmura

Yasuhisa Kuzuya

Taku Hirano

Keisuke Hatta

Keiko Nii

Shinsuke Itoh

Toshiyuki Matsuoka

Medical oxygen concentrator

A glow plug including a pressure sensor () and a heater (). The glow plug includes a position-defining member which defines the positional relationship between the pressure sensor () and the heater () and has a coefficient of thermal expansion greater than that of the heater. The pressure sensor () is fixed at a predetermined sensor reference position relative to the position-defining member. The heater () is held by a heater-holding member () in such manner that an attachment position A of the heater-holding member to the heater can be displaced, with a change in external pressure, relative to a predetermined heater reference position defined by the position-defining member. A displacement transmission member () is arranged between the heater () and the pressure sensor () so as to transmit displacement of the heater () to the pressure sensor (). The coefficient of thermal expansion of the displacement transmission member () is rendered greater than that of the position-defining member.

Glow plug

A flow measurement device is disclosed, in which an accumulation of pollution substance onto a detection element is prevented, and which can measure a reverse flow similarly to a normal flow. On both ends of an outer wall outer peripheral portion of a divided flow pipe having a &OHgr;-shape pipe passage, there are oppositely formed an inlet port and an outlet port , which open in faces orthogonal to a flow direction of a main flow M that is a detection object. Within the divided flow pipe , by a curved partition , plural branch flow passages mutually branching and joining in the divided flow pipe are formed. Inside both end portions of the outer wall , undulation portions are formed so as to clog an inlet and an outlet of the outer peripheral side branch flow passage and, by this, throttles are formed respectively in a flow passage between the inlet port and the inlet of the branch flow passage and a flow passage between the outlet port and the outlet of the branch flow passage . In a bottom portion of the outer wall of the divided flow pipe , a detection element is attached so as to be exposed to a flow in the outer peripheral side branch flow passage and, against its detection face, a down flow DW further divided from a divided flow D obliquely impinges.

Flow rate and flow velocity measurement device

A flow rate and flow velocity measurement device. A part of a flow in a main flow pipe which is a detection object, is introduced into a passage of a divided flow pipe and becomes a flow The divided flow pipe has a curved portion or rather an inverted arc portion in which the flow is abruptly changed in direction or rather inverted by protuberances formed preferably in symmetry in upstream and downstream sides of the curved portion Outside the main flow pipe there is disposed on the bottom portion of the curved portion of the divided flow pipe a detection element fixed to a support body while protruding preferably 0.05-0.3 mm from flow passage faces in the vicinity thereof. An opposed face opposite to the detection element protrudes toward the detection face so as to throttle the passage and to accelerate a flow speed at the element. Thus, in the curved portion from the flow a down flow is constantly formed obliquely impinging against the detection face of the detection element improving flow measurement accuracy within a wide flow speed range.

Flow measurement device for measuring flow rate and flow velocity

A flow rate and flow velocity measurement device has a divided flow pipe ( ) which is attached so as to be orthogonal to an intake pipe ( ) of an engine, and into which a flow in the intake pipe ( ) is introduced, an inlet plate ( ) which extends in a direction orthogonal to a flow direction in the intake pipe ( ) and forms a U-shape form pipe passage in the divided flow pipe ( ) and a detection element ( ) which is disposed so as to be exposed to a flow in the divided flow pipe ( ) outside the intake pipe ( ) and detects a flow rate and a flow velocity, wherein one end of the inlet plate ( ) protrudes into the intake pipe ( ) while passing a top opening of the divided flow pipe ( ), and the divided flow pipe ( ) has a flow passage structure symmetrical with the detection element ( ) being made a center, so that an equivalent detection element ( ) output is obtained in regard to both cases in which a fluid flows through the intake pipe ( ) in a normal direction and a reverse direction.

Growing community of inventors

Aichi, Japan

Masanori Suda