Rotor nozzle for a high-pressure cleaning device

• US 5,395,053 A
• Filed: 02/18/1994
• Issued: 03/07/1995
• Est. Priority Date: 08/31/1991
• Status: Expired due to Term

• Current Assignee: Alfred Kã¤Rcher GmbH & Company KG
• Original Assignee: Alfred Kaercher GmbH & Company KG
• Inventors: Frech, Klaus
• Primary Examiner(s): GRANT, WILLIAM ALEXANDER
• Application Number:
  US08/196,102
• Time in Patent Office: 382 Days
• Field of Search: 239/227, 239/237, 239/240, 239/251, 239/252, 239/263, 239/380, 239/381, 239/383
• US Class Current: 239/227
• CPC Class Codes: B05B 3/0463 Rotor nozzles, i.e. nozzles consisting of an element having an upstream part rotated by the liquid flow, and a downstream part connected to the apparatus by a universal joint

Abstract

In order to limit the rotational frequency of the nozzle body in the housing in a rotor nozzle for a high-pressure cleaning device with a housing provided in a front wall with a pan-shaped bearing for the front, spherical end of a nozzle body having a through-bore, with an insert for a liquid opening tangentially into the housing, the liquid in the housing being caused to rotate thereby about the longitudinal axis of the housing, so that the nozzle body rotates together with the rotating liquid and thereby abuts with a contact surface at its periphery on the inside wall of the housing, whereby the longitudinal axis of the nozzle body is inclined in relation to the longitudinal axis of the housing, it is suggested that a braking member is mounted in the nozzle body at its back end facing away from the front, spherical end for displacement in longitudinal direction of the nozzle body and that a contact surface is arranged adjacent to the back end of the nozzle body at the end face in the housing, the braking member mounted in the nozzle body protruding beyond the end of the nozzle body to abut on this contact surface as soon as the nozzle body rotates in the housing.

Claims

1. A rotor nozzle for a high-pressure cleaning device comprising:

a housing having a front wall provided with a pan-shaped bearing for a front, spherical end of a nozzle body having a through-bore;

an inlet for a liquid opening tangentially into the housing such that liquid introduced into the housing thereby will rotate about a longitudinal axis of the housing and cause the nozzle body to rotate and a peripheral contact surface of the nozzle body to abut against an inside wall of the housing, with the longitudinal axis of the nozzle body being inclined in relation to the longitudinal axis of the housing;

a braking member mounted in a back end of the nozzle body facing away from the front, spherical end for displacement in the longitudinal direction of the nozzle body;

an end face contact surface arranged adjacent to the back end of the nozzle body at an end face of the housing;

wherein the braking member protrudes beyond said back end to abut on said end face contact surface as soon as the nozzle body rotates in the housing.

2. A rotor nozzle according to claim 1, wherein said braking member is a ball.

3. A rotor nozzle in accordance with claim 2, wherein the nozzle body abuts on the inside wall of the housing via at least two peripheral contact surfaces offset in relation to each other in the direction of the longitudinal axis of said nozzle body, said peripheral contact surfaces having rolling paths on the inside wall of the housing that are of different lengths.

4. A rotor nozzle according to claim 1, wherein the braking member is mounted for free displacement in a cylindrical receiving bore at the back end of the nozzle body.

5. A rotor nozzle in accordance with claim 4, wherein the nozzle body abuts on the inside wall of the housing via at least two peripheral contact surfaces offset in relation to each other in the direction of the longitudinal axis of said nozzle body, said peripheral contact surfaces having rolling paths on the inside wall of the housing that are of different lengths.

6. A rotor nozzle according to claim 1, wherein the end face contact surface is designed as a ring surface arranged substantially perpendicular to the longitudinal axis of the nozzle body in the area of contact of the braking member.

7. A rotor nozzle according to claim 6, wherein the end face contact surface bears a central projection protruding into the inside of the housing beyond the back end of the nozzle body.

8. A rotor nozzle in accordance with claim 1, wherein the nozzle body abuts on the inside wall of the housing via at least two peripheral contact surfaces offset in relation to each other in the direction of the longitudinal axis of said nozzle body, said peripheral contact surfaces having rolling paths on the inside wall of the housing that are of different lengths.

9. A rotor nozzle according to claim 8, wherein each of said peripheral contact surfaces is formed by an O-ring.

10. A rotor nozzle according to claim 9, wherein the inside wall of the housing extends parallel to the longitudinal axis of the nozzle body, and the peripheral contact surfaces are of equal external diameter.

11. A rotor nozzle according to claim 10, wherein the at least two peripheral contact surfaces are arranged in the area of the back end of the nozzle body and surround the mounting of the braking member in the nozzle body.

12. A rotor nozzle according to claim 9, wherein the at least two peripheral contact surfaces are arranged in the area of the back end of the nozzle body and surround the mounting of the braking member in the nozzle body.

13. A rotor nozzle according to claim 8, wherein the inside wall of the housing extends parallel to the longitudinal axis of the nozzle body, and the peripheral contact surfaces are of equal external diameter.

14. A rotor nozzle according to claim 13, wherein the at least two peripheral contact surfaces are arranged in the area of the back end of the nozzle body and surround the mounting of the braking member in the nozzle body.

15. A rotor nozzle according to claim 8, wherein the at least two peripheral contact surfaces are arranged in the area of the back end of the nozzle body and surround the mounting of the braking member in the nozzle body.

16. A rotor nozzle for a high-pressure cleaning device comprising:

a housing having a front wall provided with a pan-shaped bearing for a front, spherical end of a nozzle body having a through-bore;

an inlet for a liquid opening tangentially into the housing such that liquid introduced into the housing thereby will rotate about a longitudinal axis of the housing and cause the nozzle body to rotate and at least two contact surfaces about its periphery to abut against a single inside wall surface of the housing, with the longitudinal axis of the nozzle body being inclined in relation to the longitudinal axis of the housing;

said at least two contact surfaces being offset in relation to each other in the direction of the longitudinal axis of said nozzle body, said contact surfaces having rolling paths on the inside wall surface of the housing that are of differing lengths.

17. A rotor nozzle according to claim 16, wherein each of said contact surfaces is formed by an O-ring.

18. A rotor nozzle according to claim 17, wherein the inside wall surface of the housing extends parallel to the longitudinal axis of the nozzle body, and the contact surfaces are of equal external diameter.

19. A rotor nozzle according to claim 17, further comprising a braking member mounted in a back end of the nozzle body, wherein the at least two contact surfaces are arranged in the area of the back end of the nozzle body and surround the mounting of the braking member in the nozzle body.

20. A rotor nozzle according to claim 16, wherein the inside wall surface of the housing extends parallel to the longitudinal axis of the nozzle body, and the contact surfaces are of equal external diameter.

21. A rotor nozzle according to claim 20, further comprising a braking member mounted in a back end of the nozzle body, wherein the at least two contact surfaces are arranged in the area of the back end of the nozzle body and surround the mounting of the braking member in the nozzle body.

22. A rotor nozzle according to claim 16, further comprising a braking member mounted in a back end of the nozzle body, wherein the at least two contact surfaces are arranged in the area of the back end of the nozzle body and surround the mounting of the braking member in the nozzle body.