The composite structure of the present invention comprises an elongate core material of a sintered diamond material comprising 80% by volume or more diamond particles of a mean particle size not larger than 3.5 .mu.m that are bound by an iron group metal; and a shell layer of a sintered alloy comprising at least one kind of hard particles selected from among carbide, nitride and carbonitride of at least one metal element selected from the group of 4a, 5a and 6a group metals of the Periodic Table...

A downwardly directed fixture is provided which has a fixture face, said face having a first and second annular recess, the first annular recess receiving a reflector flange and the second recess receiving a lens. The reflector flange is then held in position by a removable arc-shaped retention spring.

A construction machine where a load acting on a vehicle body during an operation is transferred to ensure the strength of the vehicle body, thereby improving reliability including welding reliability. In the construction machine, at least one of the height differences between an upper face or a lower face of the center frame at a joining portion between the center frame and the connecting member and an upper face or a lower face of a center joining portion of the connecting member is set respect...

An improved spring construction for mattresses, box springs, furniture and other applications is provided. The application of such springs in mattresses, box springs, furniture and other applications is also provided. In one aspect of the invention, the spring construction is a spring including a series of spring segments, each having a flattened, irregular configuration where the spring varies in compression strength and deflection from a top portion thereof to a bottom portion thereof.

A construction block which has improved thermal insulation qualities, has improved sound transmission migration reduction properties, and which reduces or outright eliminates the effects of a seam failure. The construction block is comprised of a pair of generally parallel faces joined by a plurality of sides. At least one baffle is disposed within the interior chamber and is located along the weld seam that joins the two body member halves of the construction block. A desiccant or insulation ga...

A construction machine where an operating load is transferred to a location having good rigidity, thereby ensuring the strength of a vehicle body and increasing the load-withstanding strength in relation to running loads. The frame of the lower traveling body of the construction machine comprising a hollow center frame having an upper plate with an attachment ring, a lower plate, and side plates that surrounding sides of the frame and that jut out from the attachment ring, and reinforcing ribs w...

A corner bracket for the manufacture of a table comprises a central bridge portion 18 having an aperture for co-operation with a leg fixing 26, together with angled rail plate portions 20 to either side of the bridge portion, each having an aperture for receiving a side rail fixing. Each rail plate portion 20 includes an angled table top plate portion 22 having an aperture for receiving a table top fixing. The bracket simplifies flat pack table construction and avoids the potential weakening of ...

A construction machine comprises a lower traveling body and an upper revolving body rotatably attached to the lower traveling body via a revolving mechanism 2, wherein a rear surveillance camera is arranged on a back surface side of the upper revolving body between a counter weight of the upper revolving body and a swing circle of the revolving mechanism, and right and left crawler end portions of the lower traveling body 1 can be simultaneously visually checked by means of the rear surveillance...

Engine noise of a construction machine is effectively reduced without reducing cooling performance and with an increase in the height of a body cover kept minimum. To achieve the above, an air-intake opening portion (10) and an air discharge opening portion (11) are arranged in a body cover (8) of an upper rotating body (1), and a cooling fan (5) in an engine room covered by the body cover (8) is driven, taking cooling air in from the air-intake opening portion (10) to cool a heat exchanger (7) ...

The present invention relates to a construction machine having a working oil tank and a switching valve to open/close the pilot line of the hydraulic pressure control system, the return oil from the switching valve being put back to the tank at the bottom through a return pipe, wherein a drain pipe is provided at a portion of the return pipe lower than the tank, while a plug for opening/closing the drain pipe at the outlet thereof, the oil in the working oil tank being discharged through the ret...