Abstract: Apparatus for supporting a heat exchanger such as a condenser of an air conditioning system on a vehicle, for pivotal movement between an operational position and a position angularly related to the operational position, for such purposes as inspection, cleaning, service and maintenance, the apparatus being configured for holding the heat exchanger in the operational position, and for guiding and controlling movement thereof to the tilted position, and holding the heat exchanger in the tilted position.

Abstract: Apparatus for supporting a heat exchanger such as a condenser of an air conditioning system on a vehicle, for pivotal movement between an operational position and a position angularly related to the operational position, for such purposes as inspection, cleaning, service and maintenance, the apparatus being configured for holding the heat exchanger in the operational position, and for guiding and controlling movement thereof to the tilted position, and holding the heat exchanger in the tilted position.

Abstract: Apparatus for supporting a heat exchanger such as a condenser of an air conditioning system on a vehicle, for pivotal movement between an operational position and a position angularly related to the operational position, for such purposes as inspection, cleaning, service and maintenance, the apparatus being configured for holding the heat exchanger in the operational position, and for guiding and controlling movement thereof to the tilted position, and holding the heat exchanger in the tilted position.

Abstract: An improved process 30 for making an engine poppet valve 10 provides an unfinished poppet valve 10 with an initial diameter (d1) of a valve head 22 and an initial thickness (t1) of an interface 56 between a seat facing groove 54 and a combustion face 18 of the valve 50 prior to seat facing the valve 50 to prevent burn-through during the welding process 38. Coining 40 the valve head 22 after seat facing 38 decreases the initial thickness (t1) of the interface 56 to a selected thickness (t2) and increases the initial diameter (d1) to a final or desired diameter (d2) of the valve head 22. The method of the present invention eliminates any need for removing excess material and allows for hot forming the seat facing material 58 to reduce machining steps.

Abstract: An ultra light popper valve for an internal combustion engine. The valve is formed by cold forming a blank into an elongated cup having an extremely thin wall and a flared open end onto which a cap is welded, the bosom end of the cup which defines the tip end of the valve having a wall section which is substantially of the thickness of the original blank. In accordance with one aspect of the invention, a keeper groove is formed adjacent the tip end as part of the cold forming process.

Abstract: An ultra light poppet valve for an internal combustion engine. The valve is formed by cold forming a blank into an elongated cup having an extremely thin wall and a flared open end onto which a cap is welded, the bottom end of the cup which defines the tip end of the valve having a wall section which is substantially of the thickness of the original blank. In accordance with one aspect of the invention, a keeper groove is formed adjacent the tip end as part of the cold forming process.

Abstract: A method for applying a hardsurfacing material to a workpiece such as a reciprocating aircraft engine tappet in which a carbon-containing wear resistant material in powder form is applied to a surface of the workpiece in the molten state while a sharp temperature gradient is established from the surface into the body of the workpiece to ensure that solidification occurs from the body upward. The resulting surface material consists of wear resistant carbides in a tough martensitic matrix with minimal formation of graphite.

Abstract: A stem seal for a poppet valve in an internal combustion engine. The seal is a ring type seal received in a groove formed in the valve stem and in sealing engagement with the inside diameter of a tubular valve guide. In accordance with one aspect of the invention the seal element has a plurality of circumferetial ribs formed on its outer diameter, and in accordance with another aspect a helical rib is formed on the outer diameter.

Abstract: Powdered metal parts, especitally valve parts of an internal combustion engine which are subject to adhesive wear in service, withstand such wear substantially better when they have substantially uniformly dispersed through them from about 0.75% to about 7.0% by weight of hydrate magnesium silicate (talc).

Abstract: Provided are improved nickel-based surfacing alloys containing from about 0.2% to about 5.0% by weight of either or both hafnium and niobium to the total alloy weight and iron-based surfacing alloys containing the combination of about 1.5% to about 2.5% by weight carbon in conjunction with from about 1.0% to about 2.5.% silicon whereby both types of alloys are characterized by having reduced porosity arising during the process of depositing them in a molten state by a weld surfacing process upon a nitrogen containing steel substrate.

Abstract: A cam follower and process of manufacture in which a hardenable cast iron reaction member is welded, as by high energy beam welding, to the end of a tubular, mild steel base member. The surface of the reaction member may be decarburized before welding. The weld is preferably characterized by austenitic properties and is formed by an alloy of nickel with the metal of the cam follower members.

Abstract: A process for providing an engine valve (2) with varied microstructure grain size is provided. The process includes the steps of: providing a slug (4) of suitable metallic valve composition having a grain size of less than about A.S.T.M. 8; solution heat treating slug (4) to provide a larger grain size and to substantially dissolve carbonitride stringers if present; and forging the solution heat treated slug (4) in a manner that provides a substantially uniformly distributed A.S.T.M. grain size of about 1 to about 7 in a central region beneath the combustion face of head (14) of valve (2) while cold working a seat face (16) on head (14) and extruding the stem (10) of valve (2) such that its microstructure grain size is less than about A.S.T.M. 8.

Abstract: An engine poppet valve is manufactured to have a microstructure that varies by location to match the stresses, temperature, wear and other conditions encountered in service. The microstructure is characterized by a coarse grain size in the head adjacent its combustion face, a fine grain size in the head adjacent its seat face, and a fine grain size in the stem.

Abstract: A new solution heat treated engine poppet valve has been developed which has a microstructure characterized by a large grain size in the head for optimum high temperature creep and fatigue properties and a finer grain size in the stem for good low temperature strength and fatigue properties.

Abstract: Wear resistant articles, especially valve seat inserts for internal combustion engines, are produced as sintered metal compacts comprising interspersed microzones of prealloyed austenitic stainless steel and softer ferrous metal, the microzones of austenitic stainless steel containing carbides and carbonitrides. The sintered compacts can be made by forming a green compact from prealloyed austenitic stainless steel powder atomizate blended with softer powdered ferrous metal component and powdered carbon, and sintering the green compact.

Abstract: A new solution heat treated engine poppet valve has been developed which has a microstructure characterized by a large grain size in the head for optimum high temperature creep and fatigue properties and a finer grain size in the stem for good low temperature strength and fatigue properties.

Abstract: A thermal barrier (10) fixed to a valve head (12) of a diesel engine poppet valve (14) is disclosed. The barrier includes a thin sheet metal cap 18 having a concave shield portion 18a, an annular fold or corrugation (18b) circumscribing the shield portion, and a cylindrical skirt portion welded to the valve head. The cap and the face portion (12a) of the valve head define an evacuated chamber (20) which is preferably filled with an insulating material (24) which also provides structural support for the shield portion.

Abstract: Thermal barriers (10, 26) fixed to mushroomed heads (12, 28) of poppet valves intended for diesel engines are disclosed. Thermal barrier (10) includes an insulating material (18) bonded to a face portion (12a) of mushroom head (12), a sheet metal shield (20) covering the insulating material, and a flange (22) clamped over the outer periphery of the shield and welded to the valve head. Thermal barrier (26) includes an insulating material encapsulated in a sheet metal sheath defining an evacuated chamber (32) which covers a face portion (28a) of the mushroom head (28), a sheet metal shield (30), and a flange portion (28b) integrally formed with the mushroom head and spun over the shield during final assembly to clamp the shield over the encapsulated insulating material. The flanges in both embodiments make line contact with the shield to minimize heat flow from the shields to the flanges and hence to the valve head.

Abstract: A cam follower having a two-piece composite laser welded configuration is disclosed and comprises a solid and alternatively thin wall tubular base (16) portion formed of mild steel and a thin-disc reaction portion (18) having a hardened, wear resistant outer surface portion (50). The reaction portion is joined to the base portion by laser welding which results in a weld zone (54) comprised of a fusion zone (56) bounded on either side thereof by heat affected zones (58) having relatively narrow transverse thicknesses. A method of laser welding the hardened reaction portion to the mild steel base portion is also disclosed.