Dentifrice dispensing toothbrush with refillable cartridge

• US 5,909,977 A
• Filed: 03/31/1997
• Issued: 06/08/1999
• Est. Priority Date: 03/31/1997
• Status: Expired due to Fees

• Current Assignee: Youti Kuo
• Original Assignee: Youti Kuo
• Inventors: Kuo, Youti
• Primary Examiner(s): Walczak, David J.
• Application Number:
  US08/829,242
• Time in Patent Office: 799 Days
• Field of Search: 401/146, 401/149, 401/150, 401/288, 401/176, 401/141, 401/269, 401/134, 401/133, 222/207, 222/209
• US Class Current: 401/146
• CPC Class Codes: A46B 11/002 pressurised at moment of use manually or by powered means

Abstract

A dentifrice dispensing toothbrush utilizes a refillable cartridge for storing dentifrice material and a compressible elastic button for pumping dentifrice material from the cartridge to a brush head. The refillable cartridge has special adaptive features for mounting to different sized openings of toothpaste tubes to facilitate cartridge refilling and venting entrapped air.

The essential components of the dentifrice dispensing toothbrush include 1) a brush head having an outlet opening therethrough and a series of bristles; 2) a pump assembly which has a pump chamber, an elastic compressible button and a base having a flap check valve; 3) a housing for attaching a refillable cartridge; 4) a refillable cartridge having an adaptive annular lip on its top opening for mating with the opening of a toothpaste tube and a plurality of shallow grooves for venting entrapped air, and a two-way follower disc for packing the dentifrice material. The dentifrice dispensing toothbrush optionally includes 5) a venting flip-cap for attachment to a toothpaste tube for releasing entrapped air when a cartridge is being refilled; and 6) a brush cover which seals the outlet opening of the brush head.

Claims

1. A refillable dentifrice dispensing toothbrush comprising:

a. a brush head having a platform with an outlet opening therethrough and a series of bristles which are attached to the platform;

b. a pump assembly comprising;

i. a pump chamber having (a) a base having an interior surface, an exterior surface having a recess wall and an opening therethrough, (b) a side wall having an opening therethrough, and (c) a top comprising an opening which is in communication with the outlet opening through the platform of the brush head;

ii. a depressible pump actuator attached to the side wall opening of the pump chamber for supplying a pumping force to dentifrice material stored in the pump chamber when the pump actuator is depressed;

iii. a flap check valve attached to the interior surface of the base for closing the opening in the base when the pump actuator is depressed;

c. a handle housing adapted for attachment of a refillable cartridge for storing dentifrice material, said handle housing being defined by a top which is attached to the exterior surface of the pump chamber, an open bottom and a side wall extending from the top to the open bottom;

d. a refillable cartridge containing dentifrice material which is adapted to be attached to the handle housing, said refillable cartridge being comprised of;

i. a cylindrical tube having an inner surface and an outer surface, said cylindrical tube terminating at a bottom opening end having a base and a top opening end which is in communication with the opening in the base of the pump chamber when the refillable cartridge is attached to the handle housing, said top opening end having a peripheral annular lip positioned around the top opening;

ii. a two-way follower disc positioned inside the cylindrical tube, said follower disc having an upper annular rim and a lower annular rim positioned to form a sliding fit against the inner surface of the cylindrical tube for sealing dentifrice material;

iii. a plurality of vent grooves positioned on the inner surface of the cylindrical tube and extending to the bottom open end, the length of the vent grooves being greater than the height of the follower disc, and the depth of said vent grooves being sufficiently small to prevent the flow of dentifirice material therethrough.

2. The refillable dentifrice dispensing toothbrush described in claim 1 wherein the attachable, refillable cartridge contains an end cap attached to the cartridge base for stopping the movement of the follower disc when the cartridge is detached and is being filled with dentifrice material, said end cap having an opening which is smaller in diameter than the bottom open end of the cartridge.

3. The refillable dentifrice dispensing toothbrush described in claim 1 including a venting flip cap wherein the top opening end of the refillable cartridge is connected to an outlet opening of the venting flip cap when the cartridge is detached from the handle housing for refilling purposes, said venting flip cap comprising:

a. a threaded base for mounting on a toothpaste tube opening which has threads on the exterior surface of the tube opening;

b. an outlet opening rim having (1) a sidewall which defines a flow channel and is connected to the threaded base, and (2) an edge which defines the outlet of the flow channel, said outlet opening rim having an exterior surface and an interior surface which is adapted to be mated with the exterior surface of the peripheral annular lip in the top opening end of the refillable cartridge;

c. a plurality of vent grooves disposed on the interior surface and extending inward from the edge of the outlet opening rim, the depth of the grooves being sufficiently small to permit the passage of air but prevent the passage of dentifrice material; and

d. a hinged cover connected to the sidewall, said hinged over having (1) an annular rim for inserting into the outlet opening rim and (2) ribs positioned on the annular rim which are parallel to the axis of the annular rim for mating with the corresponding vent grooves on the outlet opening rim for cleaning off any dentifrice material in the vent grooves of the outlet opening rim.

4. The refillable dentifrice dispensing toothbrush described in claim 3 wherein the exterior surface of the outlet opening rim of the venting flip-cap has vent grooves connected to the vent grooves disposed on the interior surface of the outlet opening rim for providing air paths for releasing entrapped air when the annular lip of the top opening end of the refillable cartridge is inserted into said outlet opening rim of the venting flip-cap.

5. The refillable dentifrice dispensing toothbrush described in claim 1 in which the peripheral annular lip in the top opening end has a first annular rim and a second annular rim of different outside diameters where either the first annular rim or the second annular rim is mateable with the interior surface of the outlet opening of a toothpaste tube.

6. The refillable dentifrice dispensing toothbrush described in claim 1 wherein the top opening end of the refillable cartridge has an annular wall extension with interior threads for mating with the exterior threads of a toothpaste tube spout.

7. The refillable dentifrice dispensing toothbrush described in claim 1 in which the pump actuator is a dome-shaped resilient, elastic, compressible button having its base attached to the sidewall opening of the pump chamber, said resilient button returning to its original shape when an applied pumping force is released.

8. The refillable dentifrice dispensing toothbrush described in claim 1 in which the outside diameter of the upper annular rim of the follower disc of the refillable cartridge is less than the inside diameter of the cylindrical cartridge tube when the follower disc is not placed inside the cylindrical cartridge tube, and the outside diameter of the lower annular rim of the follower disc is slightly greater than the inside diameter of the cylindrical cartridge tube when the follower disc is not placed inside the cylindrical cartridge tube.

9. The refillable dentifrice dispensing toothbrush described in claim 1 wherein the exterior surface of the peripheral annular lip positioned around the opening at the top opening end of the refillable cartridge has shallow grooves for venting entrapped air when mounted on the inner surface of the outlet opening of a toothpaste tube and said shallow grooves are mateable with corresponding ribs positioned on the recess wall on the exterior surface of the pump chamber base for wiping off residual dentifrice material in the said grooves.

10. A venting flip-cap adapted to be attached to an outlet opening of a toothpaste tube and mated with an opening in a refillable cartridge of a dentifrice dispensing toothbrush, said venting flip-cap being comprised of:

a. a threaded base for mounting on a toothpaste tube opening which has threads on the exterior surface thereof;

b. an outlet opening rim having (1) a sidewall which defines a flow channel and is connected to the threaded base, and (2) an edge which defines the outlet of the flow channel, said outlet opening rim having an exterior surface and an interior surface which is adapted to be mated with the opening in a refillable cartridge;

c. a plurality of vent grooves disposed on the interior surface and extending inward from the outlet opening rim, the depth of the grooves being sufficiently small to permit the passage of air but prevent the passage of dentifrice material when mounted to a refillable cartridge; and

d. a hinged cover connected to the sidewall, said hinged cover having (1) an annular rim for inserting into the outlet opening rim and (2) ribs positioned on the annular rim which are parallel to the axis of the annular rim for mating with the corresponding vent grooves on the outlet opening rim for cleaning off any dentifrice material in the vent grooves of the outlet opening rim.