Abstract: A method and system for repairing, replacing or installing an underground pipeline using an appropriate tool head. A coolant, preferably a cryogenic liquid, is injected in front of the tool head to embrittle or otherwise reduce the toughness of the material ahead of the tool head. The method and system of this invention are particularly suitable for use in connection with pipe splitting and pipe bursting, where a pig disposed within the underground pipeline is connected with the appropriate tool head forming a space between the pig and the tool head into which the coolant is introduced. The pipe between the pig and the tool head is embrittled by the coolant, reducing the resistance of a pipe to splitting or bursting which, in turn, reduces the force required for the pig to pull the tool head as the pig is motivated through the pipe.

Abstract: An espagnolette lock for a door or shutter. An actuating shaft can be rotatably mounted within the interior of a housing and can be coupled with a lock-actuator. The actuating shaft is monolithically formed with a tongue. A securement mechanism is configured for insertion into the housing parallel to the plane of a door panel or of the shutter for fixing the housing in position on the door panel or shutter. The securement mechanism is further configured for being supported against the door panel or shutter. When a mounting of the espagnolette lock is completed, the securement mechanism is configured to engage the actuating shaft to thereby secure and fix the actuating shaft in position in the housing.

Abstract: A flood flaps vent for sealing a building crawlspace includes: (a) a vent box portion including open opposite front and rear ends on either end of a vent passageway, the vent box including a top box portion with at least one flap slot adjacent a rear end portion of the vent box, and an opposite bottom box portion; (b) at least one flexible flood flap extending across the open rear end portion, with its upper edge seated in the flap slot, other side flap edges of the flood flap being unattached; and (c) a grate portion over the open front end portion of the vent box; the flood flap occluding the rear end portion of the vent box when it is in an at rest, home position. This simplified abstract is not intended to limit, and should not be interpreted as limiting, the scope of the claims.

Abstract: The invention relates to a system for installing tubular foundation elements having open ends, in particular (mono)piles, in an underwater ground formation, comprising an hydraulic driver, an anvil, and an adaptor for transmitting energy from the anvil to the toe of the foundation element, which adaptor fits inside the tubular foundation element.