Fluid Dispenser with Rotating Pump

Patent metadata

Field	Value
Publication number	US-2026090682-A1
Application number	US-202519341698-A
Country	US
Kind code	A1
Filing date	Sep 26, 2025
Priority date	Oct 1, 2024
Publication date	Apr 2, 2026
Grant date	—

Abstract

A fluid pump having a piston chamber forming body; a piston member that is moveable along a piston axis relative to the piston chamber forming body between an extended position and a retracted position; and a piston rotator that is moveable along the piston axis relative to the piston chamber forming body between an expanded position and a contracted position. When the piston rotator is moved between the expanded position and the contracted position, the piston rotator rotates about the piston axis relative to the piston chamber forming body. On movement of the piston rotator from the expanded position to the contracted position, the piston rotator rotates the piston member about the piston axis relative to the piston chamber forming body from a loading position to an engagement position.

First claim

We claim:

1 . A fluid pump comprising:
a piston chamber forming body; a piston member that is moveable along a piston axis relative to the piston chamber forming body between an extended position and a retracted position; and a piston rotator that is moveable along the piston axis relative to the piston chamber forming body between an expanded position and a contracted position; wherein, when the piston rotator is moved between the expanded position and the contracted position, the piston rotator rotates about the piston axis relative to the piston chamber forming body; wherein, on movement of the piston rotator from the expanded position to the contracted position, the piston rotator rotates the piston member about the piston axis relative to the piston chamber forming body from a loading position to an engagement position; and wherein the fluid pump is configured to dispense fluid on movement of the piston member between the extended position and the retracted position.

2 . The fluid pump according to claim 1 , wherein the piston rotator is coupled to the piston member to effect rotational movement of the piston member relative to the piston chamber forming body, while permitting axial movement of the piston member relative to the piston rotator.

3 . The fluid pump according to claim 1 , wherein the piston member has a keyed portion that, when viewed in cross-section perpendicular to the piston axis, is non-circular.

4 . The fluid pump according to claim 3 , wherein the keyed portion is rigid.

5 . The fluid pump according to claim 3 , wherein the keyed portion has an oval shape.

6 . The fluid pump according to claim 3 , wherein the piston member has a neck portion that is axially closer to the piston chamber forming body than the keyed portion is to the piston chamber forming body.

7 . The fluid pump according to claim 6 , wherein the neck portion is cylindrical.

8 . The fluid pump according to claim 3 , wherein the piston rotator has a housing engagement surface that faces away from the piston chamber forming body; and
wherein the piston rotator is moveable from the expanded position to the contracted position by applying a force to the housing engagement surface that is directed axially towards the piston chamber forming body.

9 . The fluid pump according to claim 8 , wherein the housing engagement surface is axially closer to the piston chamber forming body than the keyed portion is to the piston chamber forming body.

10 . The fluid pump according to claim 1 , further comprising a rotator bias member, which biases the piston rotator towards the expanded position.

11 . The fluid pump according to claim 1 , further comprising a piston bias member, which biases the piston member towards the extended position.

12 . The fluid pump according to claim 1 , wherein the piston chamber forming body comprises a cylindrical piston chamber wall having at least one pin that extends radially outwardly from the piston chamber wall;
wherein the piston rotator comprises a cylindrical rotator wall having at least one rotator channel that extends diagonally through the rotator wall; wherein the at least one pin extends radially through the at least one rotator channel; and wherein, on movement of the piston rotator from the expanded position to the contracted position, the at least one pin moves axially relative to the at least one rotator channel, which causes the piston rotator to rotate about the piston axis relative to the piston chamber forming body.

13 . The fluid pump according to claim 1 , wherein the piston rotator comprises at least one rotator shaft that extends axially;
wherein the piston member comprises at least one piston channel that extends axially; wherein the at least one rotator shaft is received by the at least one piston channel; and wherein, on movement of the piston rotator from the expanded position to the contracted position, the at least one rotator shaft rotates about the piston axis, engaging with the at least one piston channel and causing the piston member to rotate about the piston axis from the loading position to the engagement position.

14 . The fluid pump according to claim 1 , wherein the piston member is moveable axially relative to the piston chamber forming body between the extended position and the retracted position while the piston rotator remains stationary relative to the piston chamber forming body.

15 . The fluid pump according to claim 1 , wherein the piston rotator is moveable relative to the piston chamber forming body between the expanded position and the contracted position without moving the piston member axially relative to the piston chamber forming body.

16 . The fluid pump according to claim 2 , wherein the piston member has a keyed portion that, when viewed in cross-section perpendicular to the piston axis, is non-circular;
wherein the keyed portion is rigid; wherein the keyed portion has an oval shape; wherein the piston member has a neck portion that is axially closer to the piston chamber forming body than the keyed portion is to the piston chamber forming body; wherein the neck portion is cylindrical; wherein the piston rotator has a housing engagement surface that faces away from the piston chamber forming body; wherein the piston rotator is moveable from the expanded position to the contracted position by applying a force to the housing engagement surface that is directed axially towards the piston chamber forming body; wherein the housing engagement surface is axially closer to the piston chamber forming body than the keyed portion is to the piston chamber forming body; wherein the fluid pump further comprises a rotator bias member, which biases the piston rotator towards the expanded position; wherein the fluid pump further comprises a piston bias member, which biases the piston member towards the extended position; wherein the piston chamber forming body comprises a cylindrical piston chamber wall having at least one pin that extends radially outwardly from the piston chamber wall; wherein the piston rotator comprises a cylindrical rotator wall having at least one rotator channel that extends diagonally through the rotator wall; wherein the at least one pin extends radially through the at least one rotator channel; wherein, on movement of the piston rotator from the expanded position to the contracted position, the at least one pin moves axially relative to the at least one rotator channel, which causes the piston rotator to rotate about the piston axis relative to the piston chamber forming body; wherein the piston rotator comprises at least one rotator shaft that extends axially; wherein the piston member comprises at least one piston channel that extends axially; wherein the at least one rotator shaft is received by the at least one piston channel; wherein, on movement of the piston rotator from the expanded position to the contracted position, the at least one rotator shaft rotates about the piston axis, engaging with the at least one piston channel and causing the piston member to rotate about the piston axis from the loading position to the engagement position; wherein the piston member is moveable axially relative to the piston chamber forming body between the extended position and the retracted position while the piston rotator remains stationary relative to the piston chamber forming body; and wherein the piston rotator is moveable relative to the piston chamber forming body between the expanded position and the contracted position without moving the piston member axial

Assignees

• Op Hygiene Ip Gmbh

Inventors

• Ophardt Heiner
• Jones Andrew
• Shi Tony

Classifications

• A47K5/14

  Foam or lather making devices · CPC title

• A47K5/1207

  Dispensing from the bottom of the dispenser with a vertical piston · CPC title

• B05B7/0037

  including sieves, porous members or the like · CPC title

• A47K5/1211 Primary

  using pressure on soap, e.g. with piston (A47K5/1201 takes precedence; using squeeze bottles or the like A47K5/122) · CPC title

• B05B11/1087 Primary

  Combination of liquid and air pumps · CPC title