Windscreen wiper with spray nozzle

• US 7,093,317 B1
• Filed: 03/11/2000
• Issued: 08/22/2006
• Est. Priority Date: 03/24/1999
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Zimmer, Joachim
• Primary Examiner(s): Graham, Gary K.
• Application Number:
  US09/700,873
• Time in Patent Office: 2,355 Days
• Field of Search: 152/500.1, 152/500.2, 152/500.3, 152/500.4, 152/503.51, 239/284.1, 239/284.2
• US Class Current: 15/250.04
• CPC Class Codes: B60S 1/522 moving liquid spreading means, e.g. arranged in wiper arms

Abstract

A windshield wiper includes a wiper arm, which is driven via a drive shaft and to which a wiper blade is pivotably connected, in which at least one spray nozzle (10) is disposed on a pivotable part (14), the spray nozzle being composed of a plurality of parts and its housing (16) communicating disconnectably via a water line (18) to a water pump (118). In the housing (16) or in a nozzle body (12) communicating with it, a continuous water conduit (20) connected to the water line (18) is provided, from which a connecting conduit (22) branches off that leads to a spray conduit (24) that is approximately parallel to the water conduit (20) and has a nozzle opening (26), the water conduit (20) being closed on its free end (38).

Claims

1. A windshield wiper having a wiper arm, which is driven via a drive shaft and to which a wiper blade is pivotably connected, in which at least one spray nozzle (10) is disposed on a pivotable part formed as a retaining element (14), the spray nozzle being composed of a plurality of parts including a housing and nozzle body, the housing (16) of the spray nozzle communicating disconnectably via a water line (18) to a water pump (118), characterized in that in the housings (16) or in the nozzle body (12) communicating with it, a continuous water conduit (20) connected to the water line (18) is provided, from which a connecting conduit (22) branches off that leads to a spray conduit (24) that is approximately parallel to the water conduit (20) and has a nozzle opening (26), the water conduit (20) having a free end (38), and an outer part (44) of the nozzle body (12) has the nozzle opening (26) and covers an opening (34) of the retaining element (14), wherein a connection piece (100) connects the water conduit (20) to an onward-leading water line (122) or a closure cap (110) is provided on the free end (38) of the water conduit (20).

2. The windshield wiper of claim 1, wherein the connection piece (100) is offset-bent.

3. The windshield wiper of claim 1, wherein the nozzle body (12) with an orifice (28) of the spray conduit (24) protrudes in such a way from the opening (34) of the retaining element (11) that the inner wall of the spray conduit (24) or of the nozzle opening (26) toward the retaining element (14), is flush with and outer wall (46) of the retaining element (14).

4. The windshield wiper of claim 1, wherein the nozzle opening (26) is disposed in an upper region (50) of the retaining element (14), wherein the retaining element (14) has a U-shaped cross-sectional profile, and the opening (34) of the retaining element extends across a part of a leg (52) and a top wall (54).

5. The windshield wiper of claim 1, wherein a plurality of nozzle openings (26) are disposed vertically one above the other relative to the windshield.

6. The windshield wiper of claim 1, wherein a ball (48) is press-fitted with the nozzle opening (26) into a ball seat (56) of the spray conduit (58).

7. The windshield wiper of claim 1, wherein an orifice of the spray conduit (60) is formed by a stub (62) integrally formed onto the nozzle body (12), onto which stub a nozzle cap (64) that has the nozzle opening (26) is placed.

8. The windshield wiper of claim 7, wherein the nozzle cap (66) is of plastic and is clipped onto a ball seat (78) of the stub (74).

9. The windshield wiper of claim 7, wherein the nozzle opening (26) is disposed in a region of an outer inner wall (68) of the orifice of the spray conduit (60).

10. The windshield wiper of claim 9, wherein the nozzle cap (64, 66), with a guide body (70, 72) that converges on the nozzle opening (26), engages a widening of the spray conduit (60) on the side of the nozzle cap toward the nozzle body (12).

11. The windshield wiper of claim 1, wherein the connecting conduit (22) and the spray conduit (24) discharge into an annular chamber on the circumference of the nozzle body, and their discharge openings (88, 90) are covered by a diaphragm (80).

12. The windshield wiper of claim 11, wherein the diaphragm is a rubber-elastic tubular diaphragm (80) and has beads (92, 94) on its ends that are embedded in annular grooves (96, 98) of the nozzle body (86).

13. The windshield wiper of claim 12, wherein the outer diameter of the nozzle body (86) decreases in the region between the annular grooves (96, 98).

14. The windshield wiper of claim 12, wherein the outside diameter of the nozzle body (86) tapers conically toward the water line (18).

15. The windshield wiper of claim 11, wherein a ventilation bore (84) is provided on the circumference of the tubular diaphragm (80) in the housing (82).

16. The windshield wiper of claim 15, wherein the tubular diaphragm (80), after a predetermined opening stroke, is braced on a wall of the housing (82).

17. The windshield wiper of claim 1, wherein the housing (16) is retained in the opening (34) of the retaining element (14), and the nozzle body (12) has a stub (30) surrounding the connecting conduit (22), with which stub, via a plug connection, it engages the inside of an opening (36) of the housing (16).