Abstract: A method for synchronizing data within a distributed ledger network comprising a plurality of member nodes connected via a data communications system. The method comprises, at a first member node, storing first storage data representing blocks of a first blockchain and second storage data representing blocks of at least a second blockchain. The first blockchain is extended in response to at least one block being created at the first member node and data representing the at least one block is added to the first storage data. Outbound synchronization data comprising data representative of the at least one block is transmitted to at least one other member node of the distributed ledger network. Inbound synchronization data comprising data representative of one or more blocks of the second blockchain is received from a second member node and stored at the first member node.

Abstract: A two piece eraser assembly , including an eraser disk and an eraser hub for mounting and holding the eraser disk. The eraser hub includes upper and lower surfaces a flange at the peripheral edge of the hub and a stub shaft on the lower surface positioned axially with a throughbore. The eraser hub includes a plurality of spaced apertures for engaging with and detachably locking eraser disk extensions on the backside. The upper surface of the eraser disk includes a central recess and an aperture in the recess. The eraser disk includes a plurality of abrading teeth running radially from the central recess. The lower surface of the eraser disk further comprises a plurality of mounting elevations keyed for engaging with the spaced apertures or slots in the eraser hub for securely locking the eraser disk to the eraser hub.

Abstract: This disclosure provides a cast cylinder head includes two cooling jackets for use with an internal combustion engine, a method of fabricating a cylinder head, and a casting core assembly for fabricating a cylinder head. The cast cylinder head includes at least one cast-in orifice, which fluidly connects the two cooling jackets and is formed during a casting process of the cylinder head. The method of fabricating a cylinder head includes utilizing an assembly including an upper cooling jacket core and a lower cooling jacket core for forming respective upper and lower cooling jackets and at least one cast-in orifice fluidly connecting the cooling jackets.

Abstract: This disclosure provides a cylinder head having a structure allowing for more uniform lateral coolant flow, and an internal combustion engine including such a cylinder head. The cylinder head includes a lower water jacket cavity, an upper water jacket cavity in fluid communication with the lower water jacket cavity through plural orifices formed in cylinder head material between the lower and upper jacket cavities, and a coolant outlet passage extending from the upper water jacket cavity to a lateral side of the cylinder head. A rail cavity is provided in the cylinder head, extends in a longitudinal direction of the cylinder head, and is in fluid communication with the coolant outlet passage. A lateral passage is provided in the cylinder head upstream from the coolant outlet passage with a portion of the rail cavity therebetween.

Abstract: The present invention is an abrasive or abrading tool assembly comprising an abrasive or abrading tool having a housing, an air inlet port, and an exhaust outlet with a support for a wrist and forearm attached to the tool. In one embodiment including a pneumatically powered tool, the support extends toward and over the air inlet port and dust bag outlet. The abrading tool may be a rotary tool. The present invention also includes a wrist/forearm support for an abrading tool including a substantially flat body, two forks projecting from the body wherein each fork defines an orifice, and in which the orifices are positioned substantially opposite from each other, and possessing a support member that extends from the bottom of the body in the direction of the tool.

Abstract: The present invention relates to rotary abrading tools of the erasure-type. The invention includes a wheel assembly comprising an annular eraser wheel having an outer crown of radially directed teeth, a central core of an elastomeric material that radially expands during operation, and a pair of discoid hubs secured on opposite axial ends of the eraser wheel. The teeth of the eraser wheel are helically arranged.

Abstract: A head assembly for a rotary tool, comprising a body arranged for connection to a drive means, the drive means rotatable about a first axis of rotation; a rotatable element arranged for connection to a pad assembly, the rotatable element rotatable about a second axis of rotation disposed substantially parallel to the first axis of rotation; and, a locking assembly arranged to lock the rotatable element to the body to prevent rotation of the rotatable element relative to the body about the second axis of rotation.

Abstract: A two piece eraser assembly for use as a rotary tool attachment for abrading surfaces enables quick and easy replacement of worn eraser disks without requiring the assistance of any hand held tools in either the removal or in the reinstallation process. The assembly, including aftermarket replacement parts therefor, comprise an eraser disk and an eraser hub for mounting and holding the eraser disk. The eraser hub includes upper and lower surfaces, wherein the eraser hub upper surface features a centrally positioned throughbore, a flange at the peripheral edge of the hub and a stub shaft on the lower surface positioned axially with the throughbore. The eraser hub includes a plurality of spaced apertures for engaging with and detachably locking eraser disk extensions on the backside, so the eraser disk is mounted flush with the eraser hub. The upper surface of the eraser disk includes a central recess and an aperture in the recess keyed for axially alignment with the throughbore of the eraser hub.

Abstract: A head assembly for a rotary tool, comprising a body arranged for connection to a drive means, the drive means rotatable about a first axis of rotation; a rotatable element arranged for connection to a pad assembly, the rotatable element rotatable about a second axis of rotation disposed substantially parallel to the first axis of rotation; and, a locking assembly arranged to lock the rotatable element to the body to prevent rotation of the rotatable element relative to the body about the second axis of rotation.

Abstract: The present invention is an abrasive or abrading tool assembly comprising an abrasive or abrading tool having a housing, an air inlet port, and an exhaust outlet with a support for a wrist and forearm attached to the tool. In one embodiment including a pneumatically powered tool, the support extends toward and over the air inlet port and dust bag outlet. The abrading tool may be a rotary tool. The present invention also includes a wrist/forearm support for an abrading tool including a substantially flat body, two forks projecting from the body wherein each fork defines an orifice, and in which the orifices are positioned substantially opposite from each other, and possessing a support member that extends from the bottom of the body in the direction of the tool.

Abstract: A method of constructing an assembly comprising an insulating fiber mass by pre-compressing the fiber mass to a controlled extent so that damage to the fibers is avoided, introducing the pre-compressed fiber mass into a cavity and releasing the pre-compression so that the fiber mass is retained under compression by the cavity wall.

Abstract: A composite structure comprising a plurality of interlayered inorganic fiber mats and organic fiber webs held together over the greater part of their areas by needled fibers from at last one of the webs, the needled fibers extending at least part way through one or more of the mats or webs in the thickness direction thereof, the inorganic fibers being staple polycrystalline refractory metal oxide fibers having an average diameter of 0.5 to 5 microns, and the structure having a punch density of 60 to 260 per square inch.