A vertical underground stump grinding apparatus having an elongated stump grinding tool rotatable about a vertical axis with cutting blades on the surface and a drilling end rotatably mounted on a vehicle such as a hydraulic excavator, skid steer loader, self propelled vehicle, or tow behind trailer which provide adequate power to rotate the tool and directional support to provide vertical movement into the ground adjacent the stump, transverse movement underground toward and in grinding engagem...

A hermetic package for electronic components which is made of metallic silicon is disclosed. The package creates a cavity for receiving the electronic component, preferably a piezoelectric device, which provides a evacuated environment in the range of 1.times.10.sup.-5 to 1.times.10.sup.-11 torr. In a first embodiment, the single crystal metallic silicon is p-doped to make it electrically conductive, obviating the need for lead wires which could compromise the hermeticity of the package. Silicon...

The current invention is a conveyor belt system and a conveyor belt drive roller and method of making in which the drive roller comprises a cylindrical body having a circumference and opposite ends, a plurality of lug grooves in the cylinder located around the circumference of the cylinder and a belt slot in the cylinder located around the circumference of the cylinder. It is preferred that the belt slot is located adjacent the lug grooves and deeper than the lug grooves. It is also preferred th...

A multi-layer lamination is formed from a core sandwiched between a first oriented plastic layer and a second oriented plastic layer. The orientations of the plastic layers cross at an angle between but not equal to zero degrees and 180 degrees relative to one another. A method for making the lamination is also disclosed.

A lead-bond type chip package includes a multilayer substrate for supporting and electrical interconnecting a semiconductor chip. The multilayer substrate has a slot defined therein. The multilayer substrate comprises an interlayer circuit board having prepregs disposed thereon, a plurality of leads on the prepreg on the upper surface of the interlayer circuit board, and a plurality of solder pads for making external electrical connection on the prepreg on the lower surface of the interlayer cir...

1. Roll paper feed device (1) for a printing machine (2), comprising a cradle (3) provided with side cheeks (4), means (5, 7) at the bottom of the cradle for supporting a freely rotating paper roll (6) whenever the free end of the paper web (10) is subjected to a traction (9), braking means (13) for the rotating roll (6), which are joined to the cradle and have at least one elastic bearing member (14) against a side of the roll, which member comprises at least one elastically deformable arm (19)...

The present invention relates to device for attaching at least one slat of a slatted base to a frame of the slatted base, the device comprising a first member (2) arranged to be attached to the inner side of the frame of the slatted base and comprising first connecting means (5'); a second member (1) comprising a top portion (1'') arranged to engage an extremity of at least one slat of the slatted base, a base portion (1') connected to the top portion by means of at least one resilient member (4...

A winder for winding wire onto coil supports of dynamo-electric cores with translational, rotational, and stratification motions with respect to a central longitudinal axis of the dynamo-electric core is provided. The rotational motion may preferably be provided by the rocking motion of a gear sector. The stratification motion may preferably be provided by the implementation of a spiral groove. The spiral groove preferably shares the same longitudinal axis as the winder. The rotation of the spir...

A downdraft boiler has a ceramic burner plate overlying a horizontal-tube heat exchanger at least the upper tubes of which each have an internal turbulator preventing premature vaporization of the water traversing the heat exchanger. The turbulator can consist of a twisted metal strip whose edges lie along helices.

A self-propelled road milling machine is equipped with a cooling system comprising a fan for drawing in air, a cooler, and a suction channel. The suction channel has a vent opening facing the cooler and an intake opening. In relation to the longitudinal axis of the road milling machine, the intake opening points to the side of the road milling machine, so that air is drawn in from the side. This results in significantly less dirt being sucked into the machine than when the suction channel is pos...