Spool valve and piston power plant
This patent describes an engine. It comprises cylinders each containing a piston disposed therein for reciprocating movement, a crankshaft connected to one end of each piston, a drive shaft connected to an end of the crankshaft, a source of pressurized fluid connected by conduits to each cylinder, each piston comprising: a first sealing member acting as the piston head, a second sealing member acting as the bottom of the piston, an arm connected at one end thereof to the bottom of the piston and connected at the other end thereof to the crankshaft, a lower fluid chamber formed by the bottom of the piston and a housing surrounding the arm and the crankshaft, a first port associated with each cylinder for delivering pressurized fluid to the head of the piston, a second port associated with each cylinder for removing pressurized fluid selectively from the upper chamber or delivering pressurized fluid to the lower chamber, a third port for removing pressurized fluid from the lower chamber, and a fourth part connected to the source of pressurized fluid and associated with each cylinder for delivering pressurized fluid to the upper chamber whereby the reciprocating movement of each piston is translated into rotary movement of the drive shaft through the crankshaft.
- Assignee:
- NOV; NOV-92-024043; EDB-92-096234
- Patent Number(s):
- US 5081840; A
- Application Number:
- PPN: US 7-462646
- OSTI ID:
- 5278879
- Resource Relation:
- Patent File Date: 9 Jan 1990
- Country of Publication:
- United States
- Language:
- English
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