US 5,632,355 A · Grease lubricating system employing an injector reset valve

Abstract

A grease lubricating system includes a plurality of injectors for distributing grease to a plurality of lubrication points, an injector reset valve for resetting the injectors and a pump for supplying grease. The injector reset valve is located between the pump and the plurality of injectors and includes a piston and a large heavy duty spring which urges the piston into sealing engagement with an inlet port of the injector reset valve during a reset position of the valve. During a pressurizing portion of a pump cycle, grease entering the injector reset valve moves the piston out of sealing engagement with the inlet port of the injector reset valve enabling grease to flow from the inlet port through an internal chamber of the injector reset valve and out of a outlet port to input ports of the injectors through an injector distribution junction. Each injector then delivers grease to its respective lubrication point. During the depressurizing portion of a pump cycle, the spring in the injector reset valve causes the piston to move back to its reset position, the piston thereby displacing sufficient grease to lower the pressure of the grease at the input ports of the injectors so that the injectors reset.

Claims22

Dependent claims

A grease lubrication system comprising:

at lease one injector having an injector input port for receiving grease and an injector output port for discharging grease, the injector being actuable between an operative position in which grease may flow from the injector input port to the injector output port and reset position in which grease is prevented from flowing from the injector input port to the injector output port, the injector being actuated to the operative position when the pressure of grease at the injector input port is at least equal to a first predetermined level and being actuated to the reset position when the pressure of grease at the injector input port is no higher than a second predetermined level, lower than the first predetermined level;
a pump for supplying grease, the pump having a pumping cycle including a pressurizing portion and a depressurizing portion;
and
common pressure reducing means connected between the pump and the injector input port for reducing the pressure at the injector input port to a level no higher than a second predetermined level during the depressurizing portion of a pump cycle to thereby cause the injector to be actuated to its reset position.

1 more element

A grease lubrication system comprising:

a plurality of injectors, each injector having an injector input port for receiving grease and an injector output port for discharging grease, the injector being actuable between an operative position in which grease may flow from the injector input port to the injector output port, and a reset position in which grease is prevented from flowing from the injector input port to the injector output port, the injector being actuated to the operative position when the pressure of grease at the injector input port is at least equal to a first predetermined level and being actuated to the reset position when the pressure of grease at the injector input port is no higher than a second predetermined level, lower than the first predetermined level;
a distribution junction having a plurality of outputs corresponding respectively to the plurality of injectors, the injector input ports being respectively connected to the outputs of the distribution junction;
a pump for supplying grease, the pump having a pumping cycle with a pressurizing portion and a depressurizing portion;
and
common pressure reducing means connected between the pump and the distributor junction for reducing the pressure at the injector input ports to a level no higher than the second predetermined level during the depressurizing portion of the pump cycle to thereby cause the injectors to be actuated to their reset position.

2 more elements

Dependencies are inferred from the claim text.

Grease lubricating system employing an injector reset valve

Life of this patent

Grease lubricating system employing an injector reset valve

Life of this patent

Abstract

Claims22