Compression retaining piston

Patent · Tue Jun 16 00:00:00 EDT 1987

OSTI ID:6378531

Quaglino, Jr, A V

A piston apparatus is described for maintaining compression between the piston wall and the cylinder wall, that comprises the following: a generally cylindrical piston body, including: a head portion defining the forward end of the body; and a continuous side wall portion extending rearward from the head portion; a means for lubricating and preventing compression loss between the side wall portion and the cylinder wall, including an annular recessed area in the continuous side wall portion for receiving a quantity of fluid lubricant in fluid engagement between the wall of the recessed and the wall of the cylinder; a first and second resilient, elastomeric, heat resistant rings positioned in grooves along the wall of the continuous side wall portion, above and below the annular recessed area. Each ring engages the cylinder wall to reduce loss of lubricant within the recessed area during operation of the piston; a first pump means for providing fluid lubricant to engine components other than the pistons; and a second pump means provides fluid lubricant to the recessed area in the continuous side wall portion of the piston. The first and second pump means obtains lubricant from a common source, and the second pump means including a flow line supplies oil from a predetermined level above the level of oil provided to the first pump means. This is so that should the oil level to the second pump means fall below the predetermined level, the loss of oil to the recessed area in the continuous side wall portion of the piston would result in loss of compression and shut down of the engine.

• Assignee: NOV-87-068011; EDB-87-132488
• Patent Number(s): US 4672921
• OSTI ID: 6378531
• Resource Relation: Patent File Date: Filed date 9 Dec 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
PISTONS
PRESSURE CONTROL
COMPRESSION
CYLINDERS
ELASTOMERS
LOSSES
LUBRICANTS
LUBRICATING OILS
LUBRICATION
PUMPS
WALLS
CONTROL
ENGINES
HEAT ENGINES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
POLYMERS
330100* - Internal Combustion Engines