GREASE GUN

Abstract

A grease gun (1) with improved handling includes a screw coupling (2) for coupling a screw cartridge (7, 8). The screw coupling (2) encompasses at least two different coupling threads (5, 6) for coupling screw cartridges (7, 8) that include different mating threads (9, 10).

Claims

1. A grease gun (1), comprising: a screw coupling (2) configured for coupling a screw cartridge (7, 8), the screw coupling (2) leads into a conveying mechanism (3) of the grease gun (1), and the screw coupling (2) has at least two different coupling threads (5, 6) configured for coupling screw cartridges (7, 8) having different mating threads (9, 10).

2. The grease gun (1) as claimed in claim 1, wherein the at least two coupling threads (5, 6) have different diameters.

3. The grease gun (1) as claimed in claim 1, wherein the at least two coupling threads (5, 6) comprise internal threads.

4. The grease gun (1) as claimed in claim 1, wherein the at least two coupling threads (5, 6) are arranged one inside the other.

5. The grease gun (1) as claimed in claim 1, wherein the screw coupling (2) includes at least two threaded nozzles (16, 17) on which, in each instance, one of the at least two coupling threads (5, 6) is arranged or formed.

6. The grease gun (1) as claimed in claim 1, wherein the at least two coupling threads (5, 6) are nested one inside the other such that the at least two coupling threads terminate flush on the cartridge side.

7. The grease gun (1) as claimed in claim 1, wherein the grease gun (1) is a single-lever grease gun or a double-lever grease gun.

8. The grease gun (1) of claim 1, wherein the at least two coupling threads are arranged concentrically with respect to one and surround an outlet aperture (11) of the screw coupling (2) into a conveying connection (12) of the conveying mechanism (3) toward a discharge aperture (4) of the grease gun (1).

9. The grease gun (1) of claim 5, wherein the at least two threaded nozzles (16,

17. are arranged at least one of one inside the other or concentrically with respect to one another, and concentrically surround an outlet aperture (11) of the screw coupling (2).

10. The grease gun (1) of claim 6, wherein free, cartridge-side end faces (13, 14) of the at least two coupling threads (5, 6) are arranged in a common plane.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The invention will now be described in more detail with reference to an embodiment example, but it is not restricted to this embodiment example. Further embodiment examples result by combining the features of individual or several claims for protection with one another, and/or by combining individual or several features of the embodiment example. Shown are:

[0013] FIG. 1 a perspective side view of a grease gun,

[0014] FIG. 2 a partially broken-away side view of the grease gun from FIG. 1 with a screw cartridge coupled onto an inner coupling thread of two coupling threads of the grease gun, and

[0015] FIG. 3 a partially broken-away side view of the grease gun from FIGS. 1 and 2 with a screw cartridge coupled onto an outer coupling thread of two coupling threads of the grease gun.

DETAILED DESCRIPTION

[0016] All the figures show a grease gun designated in its entirety by 1. The grease gun 1 includes a screw coupling 2 for coupling a screw cartridge. The screw coupling 2 leads into a conveying mechanism 3 of the grease gun 1. With the aid of the conveying mechanism 3, lubricant can be conveyed out of a discharge aperture 4 of the grease gun 1 and supplied to a point of lubrication.

[0017] A comparison of FIGS. 2 and 3 makes it clear that the screw coupling 2 encompasses a total of two different coupling threads 5 and 6 for coupling screw cartridges 7 and 8 having different mating threads 9 and 10.

[0018] The two coupling threads 5 and 6 differ by virtue of their diameters and take the form of internal threads. The mating threads 9 and 10 of the two screw cartridges 7 and 8 correspondingly take the form of external threads. FIG. 2 shows screw cartridge 7 with the smaller mating thread 9 in the inner coupling thread 5 with the smaller diameter. FIG. 3 shows screw cartridge 8 with its larger mating thread 10 in the larger coupling thread 6 of the grease gun 1.

[0019] The partially broken-away representations of the grease gun 1 according to FIGS. 2 and 3 show that the two coupling threads 5 and 6 have been arranged one inside the other and concentrically with respect to one another and concentrically with respect to an outlet aperture 11 of the screw coupling 2 of the grease gun 1. The outlet aperture 11 of the screw coupling 2 leads into a conveying connection 12. Via the conveying connection 12, the outlet aperture 11 of the screw coupling 2 has been connected to the discharge aperture 4 of the grease gun 1.

[0020] The screw coupling 2 of the grease gun 1 includes two threaded nozzles 16 and 17. Threaded nozzle 16 is an inner threaded nozzle and includes the inner coupling thread 5. Threaded nozzle 17 is an outer threaded nozzle and includes the outer coupling thread 6 of the two coupling threads 5 and 6. The inner threaded nozzle 16 has been arranged within the outer threaded nozzle 17. In each instance, one of the two coupling threads 5 and 6 has consequently been formed on each of the threaded nozzles 16 and 17. The two threaded nozzles 16 and 17 have been arranged concentrically with respect to one another. Furthermore, the threaded nozzles 16 and 17 concentrically surround the outlet aperture 11, already mentioned previously, of the screw coupling 2. Through the outlet aperture 11, the lubricant—as a rule, lubricating grease—reaches the conveying mechanism 3 of the grease gun 1 from the respectively screwed-in screw cartridge 7 or 8 when the grease gun 1 is actuated, and is finally discharged via the discharge aperture 4.

[0021] The two coupling threads 5 and 6 and the two threaded nozzles 16 and 17 have been nested one inside the other in such a way that they terminate flush on the cartridge side. Accordingly, free, cartridge-side end faces 13 and 14 of the two coupling threads 5 and 6 and of the two threaded nozzles 16 and 17 are situated in a common imaginary plane.

[0022] The grease gun 1 shown in the figures takes the form of a double-lever grease gun. On one of the two levers the grease gun 1 includes a holder 15 for the screw cartridge 7 or 8.

[0023] The invention is concerned with improvements in the technical field of grease guns. In order to improve the handling of a grease gun 1, the latter includes a screw coupling 2 for coupling a screw cartridge 7 or 8. The screw coupling 2 encompasses at least two different coupling threads 5 and 6 for coupling screw cartridges 7 and 8 that include different mating threads 9 and 10.

LIST OF REFERENCE SYMBOLS

[0024] 1 grease gun

[0025] 2 screw coupling

[0026] 3 conveying mechanism

[0027] 4 discharge aperture

[0028] 5 inner coupling thread

[0029] 6 outer coupling thread

[0030] 7 screw cartridge

[0031] 8 screw cartridge

[0032] 9 mating thread on 7

[0033] 10 mating thread on 8

[0034] 11 outlet aperture of 2

[0035] 12 conveying connection

[0036] 13 end face of 5

[0037] 14 end face of 6

[0038] 15 holder

[0039] 16 inner threaded nozzle

[0040] 17 outer threaded nozzle