Fluid filtering device

Claim 2

In a filtering apparatus, for removing foreign matter from a fluid provided in a tank (100) at a fluid level (101) and which can be mounted on a side (lOOa) of the tank, including filter means inside a container and pump means connected to conduit means for pumping and removing the fluid from the tank to the filtering means in the container and for recycling the filtered fluid from the container to the tank after removal of the foreign matter, wherein the pump means comprises: (a) pump impeller means (32) mounted in a pump housing (15, 15a) defining a chamber (30) submersible in the fluid in the tank; (b) a rotatable drive shaft (33) connected to the impeller means which has a length which can extend above the fluid level of the tank; (c) housing means (12) and support means (16) mounted on the housing means and supporting the drive shaft for rotation; (d) rotatable interconnected drive means, driven means (36, 40 and 41) in spaced relationship to each other and mounted on the housing means with the driven means mounted on the drive shaft; (e) a motor (13) mounted on the housing means so that when the apparatus is mounted on the tank it will be outside of the tank and includes a rotor shaft (13a) in spaced apart relationship to the drive shaft and connected to the drive means so as to rotate the drive means and thus the driven means, shaft and impeller means; and (g) said conduit means comprises a first conduit means (17, 43, 21, 53) separate from the drive shaft leading from the pump housing to the container (10, 54) containing the filtering means which filters the fluid pumped by the pump impeller means through the filter means and then through a second conduit means (18, 46, 50, 52) which will direct filtered fluid back to the tank.

Claim 3

In a filtering apparatus, for removing foreign matter from a fluid provided in a tank (100) at a fluid level (101) and which can be mounted on a side (lOOa) of the tank, including filter means inside a container and pump means connected to conduit means for pumping and removing the fluid from the tank to the filtering means in the container and for recycling the filtered fluid from the container to the tank after removal of the foreign matter, wherein the pump means comprises: (a) pump impeller means (32) mounted in a pump housing (15, 15a) defining a chamber (30) submersible in the fluid in the tank; (b) a rotatable drive shaft (33) connected to the impeller means which has a length which can extend above the fluid level of the tank; (c) a driven pulley wheel (36) attached to the drive shaft; (d) housing means (12) and support means (16) mounted on the housing means and supporting the drive shaft for rotation by the driven pulley wheel; (e) a rotatable drive pulley wheel (40) placed in spaced relationship to the driven pulley wheel and mounted on the housing means; (f) belt means (41) mounted around the drive pulley wheel and driven pulley wheel; (g) a motor (13) mounted on the housing means so that when the apparatus is mounted on the tank it will be outside the tank and will extend below the fluid level with a rotor shaft (13a) in spaced apart and parallel relationship to the drive shaft and connected thereto so as to rotate the drive pulley wheel and thus the belt, driven pulley wheel, shaft and impeller means; and (h) said conduit means comprises a first conduit means (17, 43, 21, 53) separate from the drive shaft leading from the pump housing to the container (10, 54) containing the filtering means which filters the fluid pumped by the pump impeller means through the filter means and then through a second conduit means (18, 46, 50, 52) which will direct filtered fluid back to the tank.

Claim 4

In a filtering apparatus, for removing foreign matter from a fluid provided in a tank (100) at a fluid level (101) and which can be mounted on a side (lOOa) of the tank, including filter means inside a container and pump means connected to conduit means for pumping and removing the fluid from the tank to the filtering means in the container and for recycling the filtered fluid from the container to the tank after removal of the foreign matter, wherein the pump means comprises: (a) pump impeller means (32) mounted in a pump housing (15, 15a) defining a chamber (30) submersible in the fluid in the tank; (b) a rotatable drive shaft (33) connected to the impeller means which has a length which can extend above the fluid level of the tank; (c) a driven pulley wheel (36) attached to the drive shaft; (d) housing means (12) and support means (16) mounted on the housing means and supporting the drive shaft for rotation by the driven pulley wheel; (e) a rotatable drive pulley wheel (40) placed in spaced relationship to the driven pulley wheel and mounted on the housing means; (f) belt means (41) mounted around the drive pulley wheel and driven pulley wheel; (g) a motor (13) mounted on the housing means so that when the apparatus is mounted on the tank it will be outside the tank and will extend below the fluid level with a rotor shaft (13a) in spaced apart and parallel relationship to the drive shaft and connected thereto so as to rotate the drive pulley wheel and thus the belt, driven pulley wheel, shaft and impeller means; and (h) said conduit means comprises a first conduit means (17, 43, 21, 53) separate from the drive shaft leading from the pump housing to the container (10, 54) containing the filtering means which filters the fluid pumped by the pump impeller means through the filter means and then through a second conduit means (18, 46, 50, 52) which will direct filtered fluid back to the tank.

Claim 5

The filtering apparatus of claim 2 wherein the housing means has an underside (12a) wherein the container for the filtering means is mounted on the underside of the housing means and wherein the housing means includes wall means defining portions (43, 46) of the first and second conduit means.

Claim 6

The filtering apparatus of claim 2 wherein the housing means confines the drive pulley wheel and the driven pulley wheel.

Claim 7

The filtering apparatus of claim 2 wherein the drive pulley wheel and the driven pulley wheel have grooves (36a, 40a) which receive an elastic and flexible belt as the belt means which is stretched between the pulley wheels.

Claim 8

The filtering apparatus of claim 2 wherein the housing means has an underside and wherein an adjuster plate (14) is mounted to the motor adjacent the underside of the housing means for positioning the apparatus on the side of the tank.

Claim 9

The filtering apparatus of claim 2 wherein the housing means has an underside and wherein the motor is mounted on the underside of the housing means so that the rotor shaft has a longitudinal axis of rotation parallel to a longitudinal axis of rotation on the drive shaft and wherein the motor is in spaced relationship to the pump housing so that it will be outside of the tank.

Claim 10

The filtering apparatus of claim 2 wherein the housing means is provided with a threaded extension (12g) and the filter container has a threaded extension connected to the tPhreaded extension of said housing means wherein the first and second conduit means lead to and from the container through the housing means and wherein the housing means includes wall means defining portions (43, 46, 47) of the first and second conduit means.

Claim 11

The filtering apparatus of claim 2 wherein portions (43, 46, 47) of the first and second conduit means are defined by wall means in the housing means, and by flexible conduits (52, 53) leading to and from the portions of the housing means to the container (54) so that fluid flows through the container and filtering means and is returned to the housing means.

Claim 12

The filtering apparatus of claim 2 wherein the container for the filtering means is mounted on the housing means and wherein the housing means includes wall means defining portions (43, 46) of the first and second conduit means, wherein the housing means confines the drive pulley wheel and the driven pulley wheel, wherein the drive pulley wheel and the driven pulley wheel have grooves (36a, 40a) which receive an elastic and flexible belt as the belt means which is stretched between the pulley wheels and wherein the motor is mounted on the housing means so that the rotor shaft has a longitudinal axis of rotation parallel to a longitudinal axis of rotation of the drive shaft.

Claim 13

The filtering apparatus of claim 10 wherein the housing, means is provided with a threaded extension (12g) and the filter container includes a threaded extension connected to the threaded extension of said housing means.

Claim 14

The filtering apparatus of claim 10 wherein the first and second conduit means includes flexible conduits (52, 53) leading to and from the portions of the housing means to the container (54).

Claim 15

The filtering apparatus of claim 2 wherein the housing means has an underside and wherein the motor is mounted on the underside of the housing means so as to project inside the housing means whereby the drive pulley wheel is positioned.

Claim 16

The filtering apparatus of claim 2 wherein an adjuster plate is mounted on the motor so as to be able to position the apparatus with respect to the tank.