Metering pump for highly viscous fillings

A metering pump for highly viscous fillings having a pump housing, a cylinder (2) defined within the housing, a piston (1) reciprocatably received in the cylinder, drive means for reciprocating the piston within the cylinder, a suction inlet (9) extending from the cylinder through the housing for communication with a source of viscous fillings, a discharge outlet (10) extending from the cylinder through the housing for delivering viscous fillings from the cylinder, a rotary slide valve (4) for controlling the movement of the viscous fillings through the pump, a plate cam (36) driven by the drive means, a coupling assembly (14) driven by the plate cam, and a clamping lever (25) engaged with the rotary slide valve (4) for oscillating the rotary slide valve, wherein the coupling assembly comprises:

• a connecting rod (15) reciprocated by said plate cam (36);
• a pivoted lever (20) having two ends;
• said connecting rod (15) being connected to said pivoted lever (20) intermediate its ends;
• a transmission lever (24) connected at one of its ends to said clamping lever (25) and at its other end to the first end of said pivoted lever (20);
• an articulated joint (21) formed on the other end of said pivoted lever (20);
• a displaceably arranged bearing block (16) movably mounted on said housing and connected to said articulated joint (21);
• and
• an adjusting drive (30) for progressively altering the position of said bearing block on the housing independently of the crankshaft type drive so that the articulated joint (21) can be progressively moved while the metering pump and its rotary slide valve are in operation, for altering the position of the rotational angle of oscillation (11, 12) of the rotary slide valve.

A metering pump for highly viscous fillings having a pump housing, a cylinder (2) defined within the housing, a piston (1) reciprocatably received in the cylinder, drive means for reciprocating the piston within the cylinder, a suction inlet (9) extending from the cylinder through the housing for communication with a source of viscous fillings, a discharge outlet (10) extending from the cylinder through the housing for delivering viscous fillings from the cylinder, a rotary slide valve (4) for controlling the movement of the viscous fillings through the pump, a plate cam (36) driven by the drive means, a coupling assembly (14) driven by the plate cam, and a clamping lever (25) engaged with the rotary slide valve (4) for oscillating the rotary slide valve, wherein the coupling assembly comprises:

• a connecting rod (15) reciprocated by said plate cam;
• a pivoted lever (20) having two ends;
• a transmission lever (24) connected between said clamping lever (25) and one end of said pivoted lever (20);
• a center bearing (22) attached to said pivoted lever (20) intermediate its ends and connected to said connecting rod (15) for imparting motion to said pivoted lever;
• an articulated joint (21) formed on the other end of said pivoted lever;
• a displaceably arranged bearing block (19) connected to said articulated joint (21);
• and
• an adjusting drive (30) for altering the position of said bearing block (19) and articulated joint (21) with respect to the housing independently of the crankshaft - type drive;
• wherein center bearing (22) is connected to and moves with connecting rod (15) to shift pivoted lever (20) in the direction of movement of connecting rod (15) for oscillating the rotary slide valve (4), and the adjusting drive (30) can progressively alter the position of the articulated joint (21) while the metering pump and its rotary slide valve (4) are operating to alter the position of the angle of oscillation (11, 12) of the rotary slide valve.

A metering pump for highly viscous fillings comprising:

• a pump housing defining a cylinder (2);
• a piston (1) reciprocatably received in said cylinder;
• drive means (37) for reciprocating said piston;
• a suction inlet (7) extending from said cylinder through said housing for communication with a source of the viscous fillings, and a discharge outlet (8) extending from said cylinder through said housing for delivering viscous fillings from said cylinder;
• a rotary valve (4) in communication with said cylinder and with said suction inlet and with said discharge outlet (6) for controlling the flow of the viscous fillings through the pump;
• said derive means including a rotary plate cam (36) and a connecting rod 915) reciprocated by said plate cam;
• a coupling assembly (14) including a lever (20) pivoted at a first end about an articulated joint (21) and connected intermediate its ends in driven relationship to said connecting rod (15);
• a transmission lever (24) connected at one of its ends to the second end of said pivoted lever (20);
• a clamping lever (25) connected at one of its ends to said transmission lever (24), and at its other end in rotational driving relationship with said rotary valve for oscillating said rotary valve through a rotational angle;
• said articulated joint (21) including an adjustable drive (30) for progressively moving said articulated joint independently of said drive means while said metering pump and its rotary slide valve are in operation for altering the position of the rotational angle of the rotary valve.