Abstract: A bulldozer includes a blade, an engine, first and second exhaust treatment devices that treat exhaust from the engine, and an engine cover. The first exhaust treatment device is disposed in front of the engine and lower than a first upper surface of the engine. The second exhaust treatment device is disposed above the engine. The engine cover includes a second upper surface sloping forward and downward. The engine cover covers the engine and the first and second exhaust treatment devices. Longitudinal directions of the first and second exhaust treatment devices extend along a vehicle lateral direction. In a top view of the bulldozer, the second exhaust treatment device includes a portion overlapping the engine. As seen from a side of the bulldozer, a front edge of the second exhaust treatment device is positioned forward of a rear edge of the first exhaust treatment device.

Abstract: A bulldozer includes a blade, an engine, first and second exhaust treatment devices that treat exhaust from the engine, and an engine cover. The first exhaust treatment device is disposed in front of the engine and lower than a first upper surface of the engine. The second exhaust treatment device is disposed above the engine. The engine cover includes a second upper surface sloping forward and downward. The engine cover covers the engine and the first and second exhaust treatment devices. Longitudinal directions of the first and second exhaust treatment devices extend along a vehicle lateral direction. In a top view of the bulldozer, the second exhaust treatment device includes a portion overlapping the engine. As seen from a side of the bulldozer, a front edge of the second exhaust treatment device is positioned forward of a rear edge of the first exhaust treatment device.

Abstract: A vehicle body frame of a bulldozer has a left side frame, a right side frame, a base plate, and a cross member. The left and right side frames each extend in the front and back direction. The base plate spans across between the left and right side frames. The cross member is positioned between a hydraulic pump and left and right hydraulic motors. The cross member protrudes upward from the base plate. The cross member spans across between the left and right side frames. The cross member has a left conduit hole and a right conduit hole which are spaced apart in a left and right direction of the bulldozer. The first and second left hydraulic fluid tubes pass through the left conduit hole. The first and second right hydraulic fluid tubes pass through the right conduit hole.

Abstract: A bulldozer includes a cab, a vehicle body frame supporting a cab and an engine cover. The engine cover has a side plate that has a rear edge with first and second rear edges. The second rear edge is positioned above the first rear edge. The side plate has a first planar portion which includes the first rear edge and a second planar portion which includes the second rear edge. The side plate has a bent shape between the first and second planar portions. A ridgeline is disposed between the first and second planar portions and spans from the upper edge to the rear edge of the side plate. The side plate includes an attachment section which is attached to a vehicle body frame. The attachment section is positioned in the first planar portion adjacent to an intersection of the ridgeline and the rear edge of the side plate.

Abstract: A bulldozer includes a cab, a vehicle body frame supporting a cab and an engine cover. The engine cover has a side plate that has a rear edge with first and second rear edges. The second rear edge is a positioned above the first rear edge. The side plate has a first planar portion which includes the first rear edge and a second planar portion which includes the second rear edge. The side plate has a bent shape between the first and second planar portions. A ridgeline is disposed between the first and second planar portions and spans from the upper edge to the rear edge of the side plate. The side plate includes an attachment section which is attached to a vehicle body frame. The attachment section is positioned in the first planar portion adjacent to an intersection of the ridgeline and the rear edge of the side plate.

Abstract: A vehicle body frame of a bulldozer has a left side frame, a right side frame, a base plate, and a cross member. The left and right side frames each extend in the front and back direction. The base plate spans across between the left and right side frames. The cross member is positioned between a hydraulic pump and left and right hydraulic motors. The cross member protrudes upward from the base plate. The cross member spans across between the left and right side frames. The cross member has a left conduit hole and a right conduit hole which are spaced apart in a left and right direction of the bulldozer. The first and second left hydraulic fluid tubes pass through the left conduit hole. The first and second right hydraulic fluid tubes pass through the right conduit hole.

Abstract: A pneumatically operated screw driver ensuring a complete return of a piston to its top dead center. The screw driver has a compressed air return chamber for returning the piston to its top dead center by applying a compressed air in the return chamber to the piston. The piston includes a main piston and an auxiliary piston. The main piston is first reaches its bottom dead center, and then the auxiliary piston reaches its bottom dead center whereupon screw driving is terminated. Before the auxiliary piston reaches its bottom dead center, and after the main piston moves past a predetermined position, a compressed air is introduced into the return chamber. After the main piston reaches the bottom dead center, application of the compressed air pressure in the return chamber to the auxiliary piston is prevented.

Abstract: A vehicle brake hose has inner tube rubber layer 1, first and second braided fiber reinforcing layers 2, 3 that are provided outside the inner tube rubber layer 1, and an outer tube rubber layer 5 that is provided outside the second braided fiber reinforcing layer 3. The first braided fiber reinforcing layer 2 is tightly braided and the second braided fiber reinforcing layer 3 is loosely braided. The first and second braided fiber reinforcing layers 2, 3 are bonded through an adhesion layer 4 to the outer tube rubber layer 5.

Abstract: A pneumatically operated screw driver driven by a compressed air to drive screws into a workpiece. A drive bit connecting portion is rotated in a right-hand direction by rotation of a pneumatic motor and is formed with a right-handed threaded hole. A drive bit is formed at one end with a right-handed male threaded screw and at the other end with an engagement tip that engages with screws that are to be screwed into the workpiece. The drive bit is engaged with the drive bit connecting portion through threading engagement of the right-handed threaded hole and the righted-handed male threaded screw. For detaching the drive bit from the drive bit connecting portion, a rotation prevention mechanism prevents free rotation of the drive bit connecting portion. In this state, the engagement tip of the drive bit is engaged with an external tool.

Abstract: A pneumatically operated screw driver ensuring a complete return of a piston to its top dead center. The screw driver has a compressed air return chamber for returning the piston to its top dead center by applying a compressed air in the return chamber to the piston. The piston includes a main piston and an auxiliary piston. The main piston is first reaches its bottom dead center, and then the auxiliary piston reaches its bottom dead center whereupon screw driving is terminated. Before the auxiliary piston reaches its bottom dead center, and after the main piston moves past a predetermined position, a compressed air is introduced into the return chamber. After the main piston reaches the bottom dead center, application of the compressed air pressure in the return chamber to the auxiliary piston is prevented.

Abstract: A vehicle brake hose has inner tube rubber layer 1, first and second braided fiber reinforcing layers 2, 3 that are provided outside the inner tube rubber layer 1, and an outer tube rubber layer 5 that is provided outside the second braided fiber reinforcing layer 3. The first braided fiber reinforcing layer 2 is tightly braided and the second braided fiber reinforcing layer 3 is loosely braided. The first and second braided fiber reinforcing layers 2, 3 are bonded through an adhesion layer 4 to the outer tube rubber layer 5.

Abstract: A pneumatically operated screw driver driven by a compressed air to drive screws into a workpiece. A drive bit connecting portion is rotated in a right-hand direction by rotation of a pneumatic motor and is formed with a right-handed threaded hole. A drive bit is formed at one end with a righted-handed male threaded screw and at the other end with an engagement tip that engages with screws that are to be screwed into the workpiece. The drive bit is engaged with the drive bit connecting portion through threading engagement of the right-handed threaded hole and the righted-handed male threaded screw. For detaching the drive bit from the drive bit connecting portion, a rotation prevention mechanism prevents free rotation of the drive bit connecting portion. In this state, the engagement tip of the drive bit is engaged with an external tool. By rotating the external tool in a counterclockwise direction, the drive bit is disengaged from the drive bit connecting portion.

Abstract: In a driving tool, an air tank 103 is coupled via a pressure reducing valve 104 to a rear end of a handle portion 102 which is disposed substantially perpendicularly to an approximately cylindrical output section 101, and the air tank 103 is configured by: a vertical portion 103a which protrudes in the rear side of the handle section 102; and a horizontal portion 103b which extends in substantially parallel with the handle section 102, whereby the center of gravity 140 of the whole tool is positioned in the vicinity of a gripping portion 130, so that the weight balance is improved and the dimensions are reduced.

Abstract: In a driving tool, an air tank 103 is coupled via a pressure reducing valve 104 to a rear end of a handle portion 102 which is disposed substantially perpendicularly to an approximately cylindrical output section 101, and the air tank 103 is configured by: a vertical portion 103a which protrudes in the rear side of the handle section 102; and a horizontal portion 103b which extends in substantially parallel with the handle section 102, whereby the center of gravity 140 of the whole tool is positioned in the vicinity of a gripping portion 130, so that the weight balance is improved and the dimensions are reduced.

Abstract: A nailing machine is provided with a second accumulator chamber 20 capable of accumulating compressed air having a pressure higher than air pressure usable by a machine body, an air intake 16 connectable to an air compressor via an air hose or the like, a valve 22 for control of the communication between the second accumulator chamber 20 and the air intake 16, and a pressure reducing valve 21 for reducing the compressed air pressure in the second accumulator chamber 20 and supplying the pressure-reduced compressed air into a first accumulator chamber 2.

Abstract: A main valve and a manual operating valve cooperatively control the compressed air supplied to an air motor and a piston. The main valve is responsive to the compressed air supplied from the manual operating valve via an air passage. An orifice is provided in the air passage to reduce the speed of the compressed air supplied to the main valve so that the shift movement of the main valve is delayed when the manual operating valve is closed.

Abstract: An air motor has a rotor rotatable in response to the pressure of pressurized air. A cylindrical rotary member is connected to the air motor for causing a rotation in synchronism with the rotation of the rotor. A rotary slider is slidable in the axial direction along the inner cylindrical wall of the rotary member. A rotational force transmitting mechanism is provided for transmitting the rotation of the rotary member to the rotary slider. A shaft has one end fixed to the rotary slider and the other end equipped with a piston and a driver bit holder. The rotational and axial motion of the rotary slider is transmitted to a driver bit held in the driver bit holder. And, a cylinder guides the axial slide movement of the piston responsive to the pressure of pressurized air applied on a pressure-receiving surface of the piston.

Abstract: A nose 2 has a recessed portion 4 engageable with the front end of a magazine 3. A through-hole 12 is provided on each side wall of the recessed portion 4 of nose 2. The front end of magazine 3 is formed into a protruding portion 6 just fitting to or coupled into the recessed-portion 4 of nose 2. A through-hole 13 is opened across the protruding portion 6 of magazine 3 so that through-hole 13 meets through-holes 12 opened on the side walls of the recessed portion 4 when the magazine 3 is completely engaged with the nose 2. A pin 16 is inserted into the through-holes 12 and 13 to fix magazine 3 in the recessed portion 4 of nose 2. A resilient member 15 is provided between pin 16 and through-hole 13.

Abstract: A photographic support consisting essentially of a substrate and a resin layer provided on the image forming side of the substrate, said resin layer comprising a specific titanium dioxide pigment and others. This photographic support is excellent in that it has a high brightness and a high apparent whiteness and stability of the apparent whiteness is good; printed image of high sharpness can be formed thereon: and occurrence of die lip stain at production is quite little and thus it has good surface property.

Abstract: Disclosed is a process for producing a titanium dioxide pigment used for a resin-coated paper type photographic support, comprising the following steps:(a) a step of adding at least one alkaline earth metal compound in an amount of 0.01-2.0% by weight in terms of a metal oxide based on the titanium dioxide before calcination step and(b) an acid-washing step of washing the titanium dioxide at acidic state after the calcination step and before a step of surface treatment with a hydrated metal oxide,and wherein particle size of the titanium dioxide pigment is 0.110-0.150 .mu.m shown by number-average diameter obtained by measuring the diameter in a certain direction using an electron microscope. A photographic support which comprises the above titanium dioxide pigment is also disclosed. Occurrence of die lip stain and microgrit are substantially reduced in the photographic support and a photographic material made thereof exhibits improved image sharpness.