Other

Norton Company

Walter Electrical Manufacturing Company

John V Hagan

Bradley J Miller

Gerard S Walter

Richard F Buckley

Mianxue Wu

David M Duarte

A method and apparatus for machining flat or planarizing a fire deck of a bimetallic engine block includes providing a grinding wheel by disposing a series of abrasive inserts at spaced locations along a circumference of a circular head, so that during rotation of the head, the inserts form a notional annular grinding ring. The head is preferably a conventional milling head and the inserts are sized and shaped to fit within receptacles adapted to receive conventional milling inserts. In an alternate embodiment, a second series of abrasive inserts may be disposed radially inward of the first series of inserts to form an inner notional annular grinding ring disposed concentrically with the outer ring. Inner and outer inserts preferably comprise a single layer of diamond abrasive brazed onto a metallic substrate. Fabrication of the inserts with a single layer of abrasive brazed onto a substantially planar grinding face may enable a conventional milling head and milling machine to grind bimetallic workpieces without the need for the guarding typically required for bonded abrasive grinding wheels.

Abrasive inserts for grinding bimetallic components

A grinding wheel is provided for grinding the fire deck of an engine block. The grinding wheel, includes a first annular grinding element disposed concentrically with the wheel on a backing plate. The first annular grinding element includes a first abrasive component of either metal brazed single layer abrasive components or abrasive components comprising grain bonded in a porous matrix having about 55 to 80 volume percent interconnected porosity. The wheel preferably has a second annular grinding element disposed concentrically inward of the first annular grinding element. The first annular grinding element preferably comprises a single layer of relatively course diamond abrasive component brazed on a metallic substrate, while the second annular grinding element preferably comprises a single layer of relatively fine diamond abrasive components brazed on a similar substrate. Each of the first and second grinding elements are formed as a discrete units individually fastened to the backing plate to facilitate independent height adjustment of the annular grinding elements relative the backing plate. Fabrication of the first and second annular grinding elements as discrete members individually fastened to the backing plate serves to simplify both assembly of the wheel and height adjustment of the first and second annular grinding elements relative one another. Although one piece annular grinding elements are contemplated, each element may be fabricated as multi-part assemblies, such as two 180 degree or four 90 degree portions in order to prevent the accumulation of stresses and distortion during high speed testing.

Grinding wheel for grinding material from bimetallic surfaces

An abrasive tool includes a steel core having at least one cutting face which is knurled to provide a uniform texture of recesses of predetermined size. A single layer of abrasive grain such as diamond, synthetic diamond, and/or cubic boron nitride having a grit size which is less than the predetermined size of the recesses is brazed onto the cutting face so that the single layer of abrasive grain follows the texture of the cutting face to facilitate coolant and swarf transport for improved tool life, power consumption and workpiece surface finish.

Abrasive tool with knurled surface

A method is provided for machining the fire deck of an engine block. The method includes providing a grinding wheel having an outer annular grinding element disposed concentrically or the wheel may be provided with an inner annular grinding element disposed concentrically inward of an outer element. The outer element comprises a single layer of relatively coarse diamond abrasive brazed on a metallic substrate, while the inner element comprises a single layer of relatively fine diamond abrasive brazed on a similar substrate. The outer grinding element and the inner element if utilized, is formed as a discrete unit individually fastened to a backing plate to facilitate independent height adjustment of the elements relative the backing plate. The method further comprises orienting the grinding wheel with its axis of rotation at a predetermined oblique angle a relative the fire deck. The wheel is then translated towards the engine block along a tool path parallel to the fire deck wherein the outer ring will engage the block for bulk material removal, followed by the inner ring, if utilized, which removes a smaller amount of material to apply the requisite surface finish to the fire deck.

Method for grinding bimetallic components

A disposable coffeemaker filter includes a flexible porous disposable filter bag for use in brewing coffee and a drawstring slidably threaded about a top perimeter edge of the filter bag. The drawstring can be pulled to draw the filter bag from an expanded open condition for brewing coffee to a collapsed closed condition for containing the wet used coffee grounds. The drawstring thereby enables the removal and disposal of the filter bag from the basket of a coffeemaker without spilling the coffee grounds from the filter bag.

Disposable coffeemaker filter with drawstring

An electrical bus bar assembly is provided in which an elongate conductor member having at least one generally flat surface with two spaced generally parallel channels having an opening through the flat surface narrower than a major section of the channel parallel to the flat surface and separate by a riser member extending above said surface are provided with at least one connector module made up of a top member with two depending legs bent inwardly at the end remote from the top member and terminating adjacent the riser member and having a foot member on each slidably engaged in the parallel channels through said opening, and clamp means in the top member acting to exert pressure on a wire inserted between the legs and on the riser to fix the wire in the connector module and the connector module in tight conductive relation on the conductor member. Lips provided on the legs interact with grooves provided on a T-shaped member to prevent the foot members from spreading apart.

Bus bar assembly

An electrical connector block is provided having a housing with a pair of generally parallel sidewalls extending from a base member and separated by a trough open on the side opposite the base member, a groove on each sidewall opposite the trough and spaced from the open side of the trough, a cap member having depending arms adapted to slide along the sides of the parallel sidewalls over the open trough, said arms having inturned flanges engaged in the grooves of the sidewall, at least one screw member threadingly engaged in said cap member and carrying a clamp member pivoted on the end thereof between the sidewalls for clamping a wire between the clamp member and base member.

Electrical connector blocks

An electrical connector block is provided having a housing with a pair of generally parallel sidewalls extending from a base member and separated by a trough open on the side opposite the base member, a groove on each sidewall opposite the trough and spaced from the open side of the trough, a cap member having depending arms adapted to slide along the sides of the parallel sidewalls over the open trough, said arms having inturned flanges engaged in the grooves of the sidewall, at least one screw member threadingly engaged in said cap member and carry a clamp member pivoted on the end thereof between the sidewalls for clamping a wire between the clamp member and base member.

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Littleton, CO, United States of America

John V Hagan