Abstract: A filter bag assembly includes: a flexible first sheet; a flexible second sheet overlying and secured to the first sheet so that a compartment is formed therebetween; a porous filter sheet disposed between the first sheet and the second sheet so as to divide the compartment into a first compartment and a second compartment; a first port secured to the second sheet so as to communicate directly with the first compartment; and a second port secured to the second sheet so as to communicate directly with the second compartment, the second port being spaced apart from the first port. The porous filter sheet is disposed so that fluid entering the first compartment through the first port must pass through the filter sheet before entering the second compartment or exiting through the second port.

Abstract: A check valve assembly includes a first port fitting and a second port fitting with a base secured therebetween. The base has an annular sleeve encircling a seat, the seat having a central mounting hole and one or more flow channels passing therethrough. An umbrella valve includes a flexible sealing disk having an outer surface and an opposing inner surface, a mounting stem extending from the inner surface and projecting into the mounting hole of the base, the sealing disk being movable between a first position wherein at least a portion of the sealing disk sits on the seat so as to cover the one or more flow channels and a second position wherein the sealing disk is resiliently flexed so as to at least partially uncover the one or more flow channels. A retention plate is disposed between first port fitting and the seat of the base so that the retention plate sits against the outer surface of the sealing disk.

Abstract: A filter bag assembly includes: a flexible first sheet; a flexible second sheet overlying and secured to the first sheet so that a compartment is formed therebetween; a porous filter sheet disposed between the first sheet and the second sheet so as to divide the compartment into a first compartment and a second compartment; a first port secured to the second sheet so as to communicate directly with the first compartment; and a second port secured to the second sheet so as to communicate directly with the second compartment, the second port being spaced apart from the first port. The porous filter sheet is disposed so that fluid entering the first compartment through the first port must pass through the filter sheet before entering the second compartment or exiting through the second port.

Abstract: A check valve assembly includes a first port fitting and a second port fitting with a base secured therebetween. The base has an annular sleeve encircling a seat, the seat having a central mounting hole and one or more flow channels passing therethrough. An umbrella valve includes a flexible sealing disk having an outer surface and an opposing inner surface, a mounting stem extending from the inner surface and projecting into the mounting hole of the base, the sealing disk being movable between a first position wherein at least a portion of the sealing disk sits on the seat so as to cover the one or more flow channels and a second position wherein the sealing disk is resiliently flexed so as to at least partially uncover the one or more flow channels. A retention plate is disposed between first port fitting and the seat of the base so that the retention plate sits against the outer surface of the sealing disk.

Abstract: A check valve assembly includes a first port fitting and a second port fitting with a base secured therebetween. The base has an annular sleeve encircling a seat, the seat having a central mounting hole and one or more flow channels passing therethrough. An umbrella valve includes a flexible sealing disk having an outer surface and an opposing inner surface, a mounting stem extending from the inner surface and projecting into the mounting hole of the base, the sealing disk being movable between a first position wherein at least a portion of the sealing disk sits on the seat so as to cover the one or more flow channels and a second position wherein the sealing disk is resiliently flexed so as to at least partially uncover the one or more flow channels. A retention plate is disposed between first port fitting and the seat of the base so that the retention plate sits against the outer surface of the sealing disk.

Abstract: A check valve assembly includes a first port fitting and a second port fitting with a base secured therebetween. The base has an annular sleeve encircling a seat, the seat having a central mounting hole and one or more flow channels passing therethrough. An umbrella valve includes a flexible sealing disk having an outer surface and an opposing inner surface, a mounting stem extending from the inner surface and projecting into the mounting hole of the base, the sealing disk being movable between a first position wherein at least a portion of the sealing disk sits on the seat so as to cover the one or more flow channels and a second position wherein the sealing disk is resiliently flexed so as to at least partially uncover the one or more flow channels. A retention plate is disposed between first port fitting and the seat of the base so that the retention plate sits against the outer surface of the sealing disk.

Abstract: A filter bag assembly includes: a flexible first sheet; a flexible second sheet overlying and secured to the first sheet so that a compartment is formed therebetween; a porous filter sheet disposed between the first sheet and the second sheet so as to divide the compartment into a first compartment and a second compartment; a first port secured to the second sheet so as to communicate directly with the first compartment; and a second port secured to the second sheet so as to communicate directly with the second compartment, the second port being spaced apart from the first port. The porous filter sheet is disposed so that fluid entering the first compartment through the first port must pass through the filter sheet before entering the second compartment or exiting through the second port.

Abstract: A filter bag assembly includes a flexible bag bounding a compartment that is configured to hold a fluid. An inlet port and an outlet port are each secured to the flexible bag so as to communicate with the compartment. A porous filter sheet is disposed within the compartment of the flexible bag so that fluid entering the compartment through the inlet port must pass through the filter sheet before exiting the compartment through the outlet port. A first retention seal secures the porous filter sheet to a portion of the flexible bag within the compartment, the first retention seal having an outer perimeter edge that forms an annular continuous loop.

Abstract: A check valve assembly includes a first port fitting and a second port fitting with a base secured therebetween. The base has an annular sleeve encircling a seat, the seat having a central mounting hole and one or more flow channels passing therethrough. An umbrella valve includes a flexible sealing disk having an outer surface and an opposing inner surface, a mounting stem extending from the inner surface and projecting into the mounting hole of the base, the sealing disk being movable between a first position wherein at least a portion of the sealing disk sits on the seat so as to cover the one or more flow channels and a second position wherein the sealing disk is resiliently flexed so as to at least partially uncover the one or more flow channels. A retention plate is disposed between first port fitting and the seat of the base so that the retention plate sits against the outer surface of the sealing disk.

Abstract: A filter bag assembly includes a flexible bag bounding a compartment that is configured to hold a fluid. An inlet port and an outlet port are each secured to the flexible bag so as to communicate with the compartment. A porous filter sheet is disposed within the compartment of the flexible bag so that fluid entering the compartment through the inlet port must pass through the filter sheet before exiting the compartment through the outlet port. A first retention seal secures the porous filter sheet to a portion of the flexible bag within the compartment, the first retention seal having an outer perimeter edge that forms an annular continuous loop.

Abstract: A filter bag assembly includes a flexible bag bounding a compartment that is configured to hold a fluid. An inlet port and an outlet port are each secured to the flexible bag so as to communicate with the compartment. A porous filter sheet is disposed within the compartment of the flexible bag so that fluid entering the compartment through the inlet port must pass through the filter sheet before exiting the compartment through the outlet port. A first retention seal secures the porous filter sheet to a portion of the flexible bag within the compartment, the first retention seal having an outer perimeter edge that forms an annular continuous loop.

Abstract: A filter bag assembly includes a flexible bag bounding a compartment that is configured to hold a fluid. An inlet port and an outlet port are each secured to the flexible bag so as to communicate with the compartment. A porous filter sheet is disposed within the compartment of the flexible bag so that fluid entering the compartment through the inlet port must pass through the filter sheet before exiting the compartment through the outlet port. A first retention seal secures the porous filter sheet to a portion of the flexible bag within the compartment, the first retention seal having an outer perimeter edge that forms an annular continuous loop.

Abstract: A laser device for teaching and improving the putting stroke of a golfer. The device includes a housing having a power source, an on/off switch a laser, a reflective surface rotatable by a handle and a lever system, a P.C. board and a switch to prevent the laser from being accidentally shone in the eyes of other persons. The device places a light dot on a golf ball or target area and indicates any undesirable body or head motion that will be noted by movement of the light dot by a golfer while standing over and stroking a putter with an aligned sweet spot. The device also allows a golfer to use a light dot to draw an imaginary line between a golf ball being struck and a cup to improve a golfer's visualization of the travel line of the ball after stroking it with the aligned putter sweet spot.

Abstract: A putter guide device and method for improving the putting stroke of a golfer. The device includes a flat mat having an opening at one end and a pair of perpendicular lines forming a “T” intersection. A pair of guide walls are magnetically held on the flat mat to enable a golfer to stroke a putter along a horizontal line between the pair of guide walls to repeatedly and accurately hit a golf ball held in the opening with the putter sweet spot. The method includes the use of the teaching device first without the guide walls and a golf ball, then with one guide wall and a golf ball and then with both guide walls. The guide walls may be adjusted to allow more or less space for a putter head being stroked therebetween.

Abstract: Disclosed is a device for the removal of dental dowel pins that consists of a hollow boring bit for use with an otherwise conventional dental drill. The inside diameter of the hollow bit is of a size sufficient to accept a dental dowel pin of a conventional size, thus providing a means by which to bore around a dowel in order to remove it from the tooth structure in which it is implanted.

Abstract: An electronic control system for a multiple speed fluid pump and motor. A parameter of the motor, the pump, or the fluid which is expelled from the pump is measured by a sensor. When a predetermined value of the parameter is reached, the sensor provides a trip signal to a timer circuit. The timer circuit provides a drive signal to a switch while the trip signal is present and for a specified period of time after the trip signal is removed. The switch, while it is receiving the drive signal, connects the motor driving the pump into a high speed configuration. After the specified period of time, the switch will cause the motor to change to low speed operation.