Abstract:
A two part variable compression ratio (VCR) piston assembly having an outer member movable relative to an inner member to vary the compression ratio of an internal combustion engine and a hydraulic system utilizing oil from the lubrication system of the engine for automatically controlling the relative movement of the members to maintain a predetermined maximum combustion chamber pressure. A hydraulic circuit includes an upper and a lower chamber which expands and contracts conversely upon relative movement of the piston members and a system for supplying oil to the upper chamber and to the lower chamber via the upper chamber and for discharging the oil from the upper chamber in a manner which gradually changes the compression ratio of the piston until a predetermined maximum combustion chamber pressure has been achieved and which tends to maintain the maximum combustion chamber pressure after it has been achieved. The lower chamber is disposed adjacent the piston ring area of the piston assembly and the hydraulic system includes an uniquely formed pressure responsive relief valve to discharge oil from the upper chamber to the crankcase of the engine upon a predetermined pressure being produced in that chamber.
Abstract:
An airline lubricator is disclosed with a tamper-proof, oil-metering adjuster provided for adjusting the quantity of oil delivered by the lubricator, and for preventing tampering or accidental readjustment. The tamper-proof construction for a selectively adjustable screw controller includes a lock therefor wherein an elongated, rotatable, screw controller is provided with a splined portion, and the stationary body is also splined for cooperation with an axially movable lock collar that normally engages both the splines on the controller and the splines on the body to prevent tampering or accidental readjustment, and with a removable knob-like adjuster provided to selectively move and disengage the lock collar and to then also effect selective screw adjustment of the controller. When the adjuster is removed, the device becomes substantially tamper proof.
Abstract:
The piston head is hollowed for a central coolant cavity and for an outer annular coolant cavity separated by a ridge by which the head is supported on the piston body. An outer shoulder also supports the skirt part of the head on the piston body. The piston body has an upper part hollowed in the center to form part of the central coolant cavity and a lower part having a wrist pin bearing with coolant recesses in the bearing, which are connected by coolant channels leading to the annular cavity in the head. The wrist pin in the bearing has channels connecting a coolant supply channel in the piston rod to the center of the wrist pin and thence to the bearing recesses.
Abstract:
An airline lubricator is disclosed for delivering on demand metered quantities of oil to a pneumatic tool through: (1) a conduit external of the air line; (2) a conduit internal thereof; (3) by injecting an atomized mist of oil into the air line. An indicator piston reciprocates in a transparent housing mounted to the lubricator with the flow of oil so that by observing the movement of the piston it can be determined if the lubricator is operating properly. A tamper-proof oil-metering adjusted is provided for adjusting the quantity of oil delivered by the lubricator and for preventing tampering or accidental readjustment.
Abstract:
The oil control means, in one embodiment thereof, comprises an elongated conduit formed of a spring pin for insertion into drain holes of a piston to restrict admittance of oil into the drain holes from within the piston. The oil-controlled piston comprises a typical gas-engine-type piston having at least one oil-controlring drain hole formed therein in which drain hole the aforementioned oil control means has been inserted (for instance, by way of retrofitting).
Abstract:
A piston cooling device for a reciprocating piston internal combustion engine, which includes a selectively rotatable injection nozzle which selectively directs cooling lubricant against the piston head or another part of the piston, and means for indicating whether or not the lubricant is being directed against the piston head.
Abstract:
A PISTON CYLINDER, PARTICULARLY AN INTERNAL COMBUSTION ENGINE CYLINDER LINER SLEEVE, HAVING A BAND OF HARD-FACING METAL SUCH AS MOLYBDENUM, REFRACTORY METAL CARBIDE ALLOYS, PREFERABLY TUNGSTEN CARBIDE, OR THE LIKE EMBEDDED IN THE INNER SURFACE OF THE SLEEVE TO PROVIDE A CORROSION AND WEAR RESISTING BEARING FACE AROUND THE PISTON RINGS AT THE TOP END OF THE PISTON STROKE AND, IF DESIRED, ALSO AT THE BOTTOM END OF THE PISTON STROKE. THE HARD-FACING METAL BAND PREFERABLY SURROUNDS THE TOP RING OF THE PISTON AT THE TOP END OF THE PISTON STROKE. IF A HARD-FACING METAL BAND IS PROVIDED AT THE BOTTOM OF THE PISTON STROKE, IT IS LOCATED TO SURROUND THE BOTTOM OIL RING OF THE PISTON AT THE BOTTOM OF THE PISTON STROKE. THE BAND IS APPLIED BY A PLASMA ARC FLAME SPRAY AND HAS A TOTAL POROSITY LEVEL AND PORE SIZE RANGE ABLE TO RETAIN LUBRICANT WITHOUT RETAINING GRIT OF A SIZE WHICH WOULD DAMAGE THE SLEEVE OR PISTON RINGS.