An earth drain which comprises a filter encased core having, on at least one base or web surface, a first array of discrete projections or studs of uniform height and a second array of discrete projections or studs of lesser height than the projections or studs of the first array. The projections or studs of the second array are so disposed between the projections or studs of the first array that, under relatively low pressures, the filter encasing the core is maintained in spaced relationship w...

A method and apparatus for applying lateral thrust for moving a member, especially for applying lateral thrust to an earth penetrating device. A tubular mandrel of fixed length has four generally toroidal force cells disposed thereon, two laterally expandable force cells having a substantially constant radial dimension, the sum of the lateral dimensions of the lateral force cells always being the same, and two radially expandable force cells having a substantially constant lateral dimension. By ...

An earth grading machine has a powered reciprocable earth moving element guided by a vertically inclinable track member. Means for adjusting the vertical inclination of the track member includes support means accommodating pivotal movement of the track member in a vertical plane about both a first axis adjacent one end of the track member and about a second axis spaced longitudinally of the track member from said first axis.Adjustable means effects raising and lowering of the second axis.Adjusta...

A catalyst for treating an exhaust gas stream comprising a NO.sub.x occluding catalyst structure having an outer layer comprising an alkaline earth component and a rare earth component.

Disclosed is an earth structure which can be easily attached without degrading the antenna performance. The earth structure for grounding a feeder line for transmitting a signal received from an antenna to a receiver or the like has a long earth member having a predetermined length and one end connected to a ground wire of the feeder line. A portion from one end to the other end of the long earth member is not grounded, and the other end is open.

Malfunction of an earth leakage breaker due to a lightning surge is prevented, and when a lightning arrester is short-circuited and damaged by a high-level lightning surge, a power supply short circuit is prevented. A contact 41, an overcurrent detector section 43, and a zero phase current transformer 44 are disposed in order from a power supply side to a load side, and a lightning arrester 3 is connected between the overcurrent detector section 43 and the zero phase current transformer 44.

A rare earth permanent magnet consists of 20-40 wt % of at least one rare earth element R, 0.5-4.5 wt % of boron B, 0.03-0.5 wt % of M (at least one of Al, Cu, Sn and Ga), 0.01-0.2 wt % of Bi, and the balance being at least one transition metal element T.

An adapter attachment for an auger which includes an connecting shaft sized and shaped to be attached to the pilot bit hole present in the end of an auger, after the removal of pilot bit. The adapter also includes a bolt flange for connection to a foundation anchor installation plate/tool such as a locking dog assembly. The adapter obviates the need to remove the auger from the Kelly bar during anchor installation. A modification includes eliminating the bolt flange and placing the connecting sh...

The present invention has several aspects to it, one of which is the provision of a chisel point which is straight and tapered from its thinnest part at the extreme front to a thicker part at the rear thereof for causing a sweep to wear longer than prior art sweeps. This sweep also improves soil penetration and is self-sharpening. Another aspect of the present invention is to provide an earth working sweep having a front end, a right side, a left side, and a central upper portion for connecting ...

In the case of an earth boring apparatus, preferably a thrust boring apparatus, the head of which is actuated by a pneumatically operated reciprocating ram, a supply hose (5) provides the connection from a compressor as an example to the thrust boring apparatus which also serves to reverse the direction of operation by the rotation of the hose. To ensure error-free control over greater lengths of hose and to avoid kinking--partly due to the pressure from surrounding ground--the hose (5) is equip...