Abstract: A glow plug wherein a combustion gas prevention wall (67) extends radially outward on the outer circumferential surface of heater (10) such that when the heater (10) is viewed rearward from its forward end (10a) along the axial direction, the combustion gas prevention wall (67) closes an annular gap K1 at a position forward of annular membrane portion (63) of seal member (60). The combustion gas prevention wall (67) has an outer diameter D2 greater than the inner diameter D1 of forward end (136) of the housing.

Abstract: A glow plug including a substantially cylindrical housing extending in an axial direction; a rod-shaped heater unit having a front end protruding from the front end of the housing and movable in the axial direction; a connecting member connecting the heater unit to the housing within the housing and allowing the heater unit to move in the axial direction; and a pressure sensor that detects pressure received by the heater unit. The heater unit has a large-diameter portion at the rear end thereof and a small-diameter portion frontward of the large-diameter portion and having a diameter smaller than the diameter of the large-diameter portion. The connecting member connects the small-diameter portion of the heater unit to the housing within the housing.

Abstract: A glow plug including a pressure sensor (830) and a heater (150). The glow plug includes a position-defining member which defines the positional relationship between the pressure sensor (830) and the heater (150) and has a coefficient of thermal expansion greater than that of the heater. The pressure sensor (830) is fixed at a predetermined sensor reference position relative to the position-defining member. The heater (150) is held by a heater-holding member (820) 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 (840) is arranged between the heater (150) and the pressure sensor (830) so as to transmit displacement of the heater (150) to the pressure sensor (830).

Abstract: A glow plug in which a convex portion (70) is formed in an outer peripheral surface (10b) of a heater (10) in a part facing an inner peripheral surface (137b) of a leading end part (137) of a housing (110) and interposed in a leading end side annular gap K1, so as to maintain a gap with the inner peripheral surface (137b). A decline in detection accuracy can be prevented to the extent that combustion gas can be received by the leading end (72) of the convex portion (70) even if soot clogging should occur.

Abstract: A combustion pressure sensor (1) includes a housing (2) having an axial hole (23), a flexible member (8) fixed at one end to the housing (2) and being displaceable along the direction of axis (CL1), a pressure transmission body (3) whose outer circumferential surface is fixed to the other end of the flexible member (8), and a sensor element (42) fixed to the housing (2) and outputting a signal on the basis of a pressure applied thereto from the pressure transmission body (3). The housing (2) includes a main body portion (21) having a screw portion (24), and a cap member (22) having a press contact portion (26) which is pressed against the internal combustion engine when the screw portion (24) is screwed into the mounting hole of an internal combustion engine. The one end of the flexible member (8) is fixed to the main body portion (21).

Abstract: A glow plug includes a heater member; heater power lead wires which extend rearward along an axis and whose conductors electrically communicate with one and of a heater conductor for supply of power; a sensor, portion for detecting the combustion pressure of an internal combustion engine; a sensor connection line connected to the sensor portion and extending rearward along the axis; a housing; a sensor-portion-enclosing tube; and a grommet formed from an insulating rubber-like elastic material, having insertion holes through which the heater power lead wires and the sensor connection line are respectively inserted, the grommet liquid-tightly closing an end portion of the sensor-portion-enclosing tube and liquid-tightly holding the heater power lead wires and the sensor connection line.

Abstract: A glow plug including a pressure sensor (830) and a heater (150). The glow plug includes a position-defining member which defines the positional relationship between the pressure sensor (830) and the heater (150) and has a coefficient of thermal expansion greater than that of the heater. The pressure sensor (830) is fixed at a predetermined sensor reference position relative to the position-defining member. The heater (150) is held by a heater-holding member (820) 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 (840) is arranged between the heater (150) and the pressure sensor (830) so as to transmit displacement of the heater (150) to the pressure sensor (830).

Abstract: A glow plug includes a heater member; heater power lead wires which extend rearward along an axis and whose conductors electrically communicate with one and of a heater conductor for supply of power; a sensor, portion for detecting the combustion pressure of an internal combustion engine; a sensor connection line connected to the sensor portion and extending rearward along the axis; a housing; a sensor-portion-enclosing tube; and a grommet formed from an insulating rubber-like elastic material., having insertion holes through which the heater power lead wires and the sensor connection line are respectively inserted, the grommet liquid-tightly closing an end portion of the sensor-portion-enclosing tube and liquid-tightly holding the heater power lead wires and the sensor connection line.

Abstract: An arc welding cable that is resistant to bending and twisting and can give a long life is provided. For this purpose, an arc welding cable (65) for supplying a welding current, a welding wire and a sealed gas from a wire feeding device (61) to a welding torch (64), has a passage (4) for the welding wire (2) and sealed gas is located at a center of the arc welding cable and a plurality of conductors (5) are arranged apart from one another on a circumference around the passage (4). The space between the plurality of conductor (5) may be filled with a cushion material such as cotton or elastic synthetic resin.

Abstract: An arc welding cable that is resistant to bending and twisting and can give a long life is provided. For this purpose, an arc welding cable (65) for supplying a welding current, a welding wire and a sealed gas from a wire feeding device (61) to a welding torch (64), has a passage (4) for the welding wire (2) and sealed gas is located at a center of the arc welding cable and a plurality of conductors (5) are arranged apart from one another on a circumference around the passage (4). The space between the plurality of conductor (5) may be filled with a cushion material such as cotton or elastic synthetic resin.

Abstract: A split-flow-type flowmeter includes a detection element 2 disposed to face a flow path thereof and a venturi structure 4 formed within a flow path 1 in the vicinity of the detection element 2 and adapted to throttle a flow directed toward the detection element 2 to thereby reduce disturbance of the flow. The venturi structure 4 is disposed in opposition to the detection element 2 within the flow path 1 and includes a protrusion 5 protruding toward the detection element 2 within the flow path 1 of the split-flow-type flowmeter.

Abstract: A split-flow-type flowmeter in which an end portion of a flow splitter tube 1 is inserted into a main-flow pipe 10 having a diameter D. A flow splitter tube 1 includes a U-shaped split-flow passage 1a. A detection element is disposed at a bottom portion (not shown) of the U-shaped split-flow passage 1a. The split-flow passage 1a assumes a flow path structure symmetrical with respect to a plane passing through the detection element. A flow inlet 2a and a flow outlet 2b of the split-flow passage 1a face in mutually opposite directions along the flow direction of the main-flow pipe 10 and open symmetrically at the same position on the flow cross section of the main-flow pipe 10.

Abstract: 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 23 outer peripheral portion of a divided flow pipe 20 having a &OHgr;-shape pipe passage, there are oppositely formed an inlet port 25 and an outlet port 26, which open in faces orthogonal to a flow direction of a main flow M that is a detection object. Within the divided flow pipe 20, by a curved partition 27, plural branch flow passages 28a, 28b mutually branching and joining in the divided flow pipe 20 are formed.

Abstract: A split-flow-type flowmeter includes a detection element 2 disposed to face a flow path thereof and a venturi structure 4 formed within a flow path 1 in the vicinity of the detection element 2 and adapted to throttle a flow directed toward the detection element 2 to thereby reduce disturbance of the flow. The venturi structure 4 is disposed in opposition to the detection element 2 within the flow path 1 and includes a protrusion 5 protruding toward the detection element 2 within the flow path 1 of the split-flow-type flowmeter.

Abstract: A flow rate and flow velocity measurement device. A part of a flow 10 in a main flow pipe 1, which is a detection object, is introduced into a passage of a divided flow pipe 2 and becomes a flow 11. The divided flow pipe 2 has a curved portion 2c or rather an inverted arc portion in which the flow is abruptly changed in direction or rather inverted by protuberances 2a, 2b formed preferably in symmetry in upstream and downstream sides of the curved portion 2c. Outside the main flow pipe 1, there is disposed on the bottom portion of the curved portion 2c of the divided flow pipe 2 a detection element 5 fixed to a support body 4 while protruding preferably 0.05-0.3 mm from flow passage faces 2e, 2f in the vicinity thereof. An opposed face 2d opposite to the detection element 5 protrudes toward the detection face so as to throttle the passage and to accelerate a flow speed at the element.

Abstract: A flow rate and flow velocity measurement device has a divided flow pipe (332) which is attached so as to be orthogonal to an intake pipe (1) of an engine, and into which a flow in the intake pipe (1) is introduced, an inlet plate (334) which extends in a direction orthogonal to a flow direction in the intake pipe (1) and forms a U-shape form pipe passage in the divided flow pipe (332) and a detection element (331) which is disposed so as to be exposed to a flow in the divided flow pipe (332) outside the intake pipe (1) and detects a flow rate and a flow velocity, wherein one end of the inlet plate (334) protrudes into the intake pipe (1) while passing a top opening of the divided flow pipe (332), and the divided flow pipe (332) has a flow passage structure symmetrical with the detection element (331) being made a center, so that an equivalent detection element (331) output is obtained in regard to both cases in which a fluid flows through the intake pipe (1) in a normal direction and a reverse direction.

Abstract: A flow rate and flow velocity measurement device. A part of a flow 10 in a main flow pipe 1, which is a detection object, is introduced into a passage of a divided flow pipe 2 and becomes a flow 11. The divided flow pipe 2 has a curved portion 2c or rather an inverted arc portion in which the flow is abruptly changed in direction or rather inverted by protuberances 2a, 2b formed preferably in symmetry in upstream and downstream sides of the curved portion 2c. Outside the main flow pipe 1, there is disposed on the bottom portion of the curved portion 2c of the divided flow pipe 2 a detection element 5 fixed to a support body 4 while protruding preferably 0.05-0.3 mm from flow passage faces 2e, 2f in the vicinity thereof. An opposed face 2d opposite to the detection element 5 protrudes toward the detection face so as to throttle the passage and to accelerate a flow speed at the element.

Abstract: A split-flow-type flowmeter in which an end portion of a flow splitter tube 1 is inserted into a main-flow pipe 10 having a diameter D. A flow splitter tube 1 includes a U-shaped split-flow passage 1a. A detection element is disposed at a bottom portion (not shown) of the U-shaped split-flow passage 1a. The split-flow passage 1a assumes a flow path structure symmetrical with respect to a plane passing through the detection element. A flow inlet 2a and a flow outlet 2b of the split-flow passage 1a face in mutually opposite directions along the flow direction of the main-flow pipe 10 and open symmetrically at the same position on the flow cross section of the main-flow pipe 10.

Abstract: A flow rate and flow velocity measurement device has a divided flow pipe 332 which is attached so as to be orthogonal to an intake pipe 1 of an engine, and into which a flow in the intake pipe 1 is introduced, an inlet plate 334 which extends in a direction orthogonal to a flow direction in the intake pipe 1 and forms a U-shape form pipe passage in the divided flow pipe 332, and a detection element 331 which is disposed so as to be exposed to a flow in the divided flow pipe 332 outside the intake pipe 1 and detects a flow rate and a flow velocity, wherein one end of the inlet plate 334 protrudes into the intake pipe 1 while passing a top opening of the divided flow pipe 332, and the divided flow pipe 332 has a flow passage structure symmetrical with the detection element 331 being made a center, so that an equivalent detection element 331 output is obtained in regard to both cases in which a fluid flows through the intake pipe 1 in a normal direction and a reverse direction.