초록 ▼

A fluid driven reciprocating apparatus having a double acting power chamber with signal rods serving as high pressure pistons, or to transmit mechanical power. The signal rods are connected to a double acting piston in the power chamber thereby eliminating the need for pilot valves, with the piston

A fluid driven reciprocating apparatus having a double acting power chamber with signal rods serving as high pressure pistons, or to transmit mechanical power. The signal rods are connected to a double acting piston in the power chamber thereby eliminating the need for pilot valves, with the piston being controlled by a pair of intake-exhaust valves. The signal rod includes two spaced seals along its length with a vented space therebetween so that the driving fluid and driven fluid can't mix, and performs a switching function to eliminate separate pilot valves. The intake-exhaust valves can be integrated into a single housing with the power chamber, or these valves can be built into the cylinder head only of the power chamber, or they can be separate from the power chamber.

대표청구항 ▼

[What is claimed is:] [1.]a power cylinder having a double acting piston therein,a pair of cylinders on opposite sides of said power cylinder and in open fluid communication therewith,a pair of signal rods mounted on opposite sides of said double acting piston and extending into said pair of cylinde

[What is claimed is:] [1.]a power cylinder having a double acting piston therein,a pair of cylinders on opposite sides of said power cylinder and in open fluid communication therewith,a pair of signal rods mounted on opposite sides of said double acting piston and extending into said pair of cylinders,each of said pair of signal rods having at least one member thereon, each of said members being adapted to reciprocate in one of said pair of cylinders,a pair of intake/exhaust valve assemblies having a valve member therein, for controlling passage of fluid through said power cylinder,each of said intake/exhaust valve assemblies being in fluid communication with said power cylinder on an opposite side of said double acting piston, and with one of said pair of cylinders,each of said intake/exhaust valve assemblies having an exhaust port, and an intake port adapted to be connected to a source of driving fluid.