LUBRICANT PRESS, LUBRICANT PRESS KIT, AND USE OF A CARTRIDGE IN CASE OF A LUBRICANT PRESS

Abstract

For a lubricant press (1), a follower piston (13) is proposed that can be inserted into a cartridge (4) and is matched to a closing wall (6) of a cartridge holder (3), such that the follower piston (13) in the used-up cartridge (4) lies against the closing wall (6) in a planar manner.

Claims

1. A lubricant press set (26), comprising: a lubricant press (1) and a cartridge (4), the lubricant press including a press head (2) with a cartridge receptacle (3), the cartridge receptacle (3) having a closing wall (6) in which a passage (7) leads to a high-pressure chamber (8), a pressing plunger (9) movably arranged in the high-pressure chamber (8), the pressing plunger (9) is in operative connection with a hand lever (11) mounted on the press head (2) and the high-pressure chamber (8) leads to an outlet opening (12); a follower piston (13) inserted into the cartridge (4); the cartridge (4) includes a cartridge sleeve (27) surrounding a filling volume (5), and the follower piston (13) being movably inserted in the cartridge sleeve (27) to seal off the filling volume (5), a shape of the follower piston (13) is matched to the cartridge (4) such that the filling volume (5) is adapted to be emptied without leaving any residue; the follower piston (13) having a top side (15) that faces the closing wall (6) in an operating position, and the top side has a contour that matches a contour of the end wall (6) so that the top side (15) of the follower piston (13) is in planar contact with the closing wall (6) at least in a partial area (16) when a content of the cartridge (4) is used up, and the passage (7) in the closing wall (6) is at least partially arranged outside of the partial area (16).

2. The lubricant press set (26) according to claim 1, wherein an inlet opening (17) of the passage (7) in a cartridge insertion direction (19) defined by the cartridge receptacle (3) is arranged at a position (18) on the closing wall (6) furthest inside the press head (2).

3. (canceled)

4. The lubricant press set (26) according to claim 1, wherein the follower piston (13) has a shoulder (21) surrounding the top side (15).

5. The lubricant press set (26) according to claim 1, wherein the follower piston (13) is formed without interruptions.

6. The lubricant press set (26) according to claim 1, further comprising an internal thread (23) provided on the cartridge receptacle (3).

7. The lubricant press set (26) according to claim 1, further comprising a check valve (34) provided inside the passage (7).

8. (canceled)

9. The lubricant press set (26) according to claim 1, wherein the filling volume (5) of the cartridge sleeve (27) is limited by a constricting removal opening (28) and an outer diameter of the top side (15) of the following plunger (13) is matched to an inner diameter of the removal opening (28).

10. The lubricant press set (26) according to claim 9, wherein a height (29) of a shoulder (21) surrounding the top side (15) of the follower piston (13) is matched to a projection (30) of the cartridge sleeve (27) beyond the removal opening (28).

11. The lubricant press set (26) according to claim 1, wherein the follower piston (13) is at least one of unloaded by or unconnected with the press head (2).

12. A method of dispensing lubricant from a cartridge (4) with a lubricant press set (26), comprising: providing the lubricant press including a press head (2) with a cartridge receptacle (3), the cartridge receptacle (3) having a closing wall (6) in which a passage (7) leads to a high-pressure chamber (8), a pressing plunger (9) movably arranged in the high-pressure chamber (8), the pressing plunger (9) is in operative connection with a hand lever (11) mounted on the press head (2) and the high-pressure chamber (8) leads to an outlet opening (12); providing a follower piston (13) having a shape that matches the cartridge (4) and having a top side (15) that faces the closing wall (6) in an operating position, and the top side has a contour that matches a contour of the end wall (6); providing the cartridge (4) including a cartridge sleeve (27) surrounding a filling volume (5) filled with lubricant; opening the cartridge (4) at the top and that prior to removal of the lubricant from the cartridge (4); inserting the follower piston (13) into the cartridge (4) on an underside in order to close a filling volume inside the cartridge; operating the hand lever in order to dispense the lubricant; and after complete emptying of the lubricant from the cartridge (4) the follower piston (4) is in planar contact with the partial area (16) with the top side (15), and the passage (7) in the closing wall (6) is at least partially arranged outside of the partial area (16).

13. The lubricant press set (26) according to claim 1, wherein at least one of the closing wall (6) is planar at least in the partial area (16) or the top side (15) is planar.

14. The lubricant press set (26) according to claim 4, wherein the shoulder (21) has a ring-shaped shoulder surface (31) that is parallel to the top side (15).

15. The lubricant press set (26) according to claim 1, wherein the follower piston (13) comprises a circumferential sealing lip (22).

16. The lubricant press set (26) according to claim 1, wherein a receiver tube (24) is screwed into the cartridge receptacle (3), and the receiver tube (24) is open on a free end (33) thereof.

17. The lubricant press set (26) according to claim 1, further comprising a plunger pump (10) downstream of the passage (7).

18. The lubricant press set (26) according to claim 10, wherein a ring-shaped shoulder surface (22) of a shoulder (21) surrounding the top side (15) is matched to a ring-shaped inner surface (32) located between the removal opening (28) and the cartridge sleeve (27).

19. The lubricant press set (26) according to claim 1, wherein the follower piston (13) is located inside the cartridge sleeve (27) in a removable manner.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The invention will now be described in greater detail using one possible embodiment, though it is not limited in nature to the embodiment described herein. Additional embodiments result from the combination of features of individual or multiple protection claims in relation to one another and/or in combination with other features of the embodiment.

[0026] The provided figures show the following:

[0027] FIG. 1 is a sectional view of a lubricant press in accordance with the invention with inserted, filled cartridge starting from the beginning of the lubricant application from the cartridge, with the follower piston being arranged in its initial position, and

[0028] FIG. 2 is a sectional view, analogous to FIG. 1, wherein the cartridge is used up and the follower piston is located in its end position.

DETAILED DESCRIPTION

[0029] A lubricant press 1 shown in FIG. 1 and FIG. 2 is equipped with a press head 2. A cartridge receptacle 3 is formed on the press head 2, into which a cartridge 4 can be inserted. FIG. 1 shows the cartridge 4 in a state where a filling volume 5 is filled with lubricant while FIG. 2 shows a used up and fully emptied cartridge 4.

[0030] A closing wall 6 is provided in the cartridge receptacle 3. The closing wall 6 has a passage 7, which leads into a high-pressure chamber 8.

[0031] The high-pressure chamber 8 contains a pressing plunger 9 of a plunger pump 10, which can be moved inside the high-pressure chamber 8 using a hand lever 11 from the outside. The high-pressure chamber 8 has an outlet opening 12 through which lubricant exits from the filling volume 5.

[0032] The lubricant press 4 further comprises a follower piston 13, which can be inserted into an open end 14, with its top side 15 facing the front.

[0033] The top side 15 therefore faces the closing wall 6 in the operating position and exhibits contours that match the contours of the closing wall 6. Thereby the follower piston 13 rests in a planar manner with its top side 15 in a partial area 16 on the closing wall 6, when the cartridge 4 is used up (FIG. 2). Therefore no lubricant residue remains in this partial area 16.

[0034] The passage 7 is arranged in such a manner that an inlet opening 17 of the passage 7 is provided in the position 18 of the closing wall 6 furthest inside the press head. The inlet opening 19 is therefore located in the rearmost position in the cartridge insertion direction 19, defined by the cartridge receptacle 3, in the embodiment together with additional positions on closing wall 6. Therefore no pockets are present where lubricant residue might accumulate.

[0035] The closing wall 6 is designed to be planar fitting to the top side 15.

[0036] The passage 7 is provided partially outside the partial area 15 directly ahead of the remaining dead volume 20 in the cartridge receptacle 3. After replacing the used up cartridge 4 with a new one, this dead volume 20 will therefore, at least partially, be removed first. The lateral arrangement of the passage 7 also provides sufficient space for the arrangement of the oblong high-pressure chamber 8 within the press head 2.

[0037] A shoulder 21 is provided on the follower piston 13, which surrounds the top side 15 and confines the top side 16.

[0038] The shoulder 21 thereby forms a shoulder surface 31, which exhibits a ring shape and is aligned in parallel to the top side 15. This shape is matched to the cartridge 4 as will be explained in more detail.

[0039] The follower piston 13 is designed without interruptions and without a guide rod being positioned inside the cartridge 4 and exhibits a circumferential sealing lip 22 in a ring shape. The sealing lip 22 thereby seals a ring slot 37 between the follower piston 13 and a cartridge sleeve 27.

[0040] An internal thread 23 is provided on the cartridge receptacle 3, on which a receiver tube 24 is screwed into the cartridge receptacle 3 in order to hold the cartridge on a collar 25. The receiver tube 24 is designed to be open on its free end 33.

[0041] A check valve 34 is arranged in the passage 7 in order to prevent backflow of lubricant into the plunger receptacle 3 when the plunger pump 10 downstream of the passage 7 is actuated.

[0042] The lubricant press 1 forms a lubricant press set 26 in combination with the replaceable cartridge 4.

[0043] The filling volume 5 is provided inside the cartridge sleeve 27 and filled with lubricant. The follower piston 13 is movably inserted into the cartridge sleeve 27 as described and moves towards the closing wall 6 when lubricant is being removed, until it is in planar contact with partial area 16.

[0044] FIG. 2 shows that the shape of the follower piston 13 is matched to the cartridge 4, so that the filling volume 5 of the cartridge sleeve 27 can be fully emptied without residue by the follower piston 13.

[0045] The filling volume 5 of the cartridge sleeve 27 is limited by a removal opening 28, which forms a constriction inside the cartridge sleeve 27. The removal opening 28 is closed prior to first use.

[0046] The outer diameter of the top side 15 of the follower piston 13 is matched to the inner diameter of the removal opening 28 to match the shapes, meaning that in this case they are the same size. Further, the height 29 of the shoulder 21 is matched to a projection 30 of the cartridge sleeve 4 beyond the removal opening 28, meaning that in this case they are the same size, apart from the height of the seal 35. Finally, the shoulder surface 31 is matched to a ring-shaped inner surface 32, meaning that they are the same size in this case, with this inner surface 32 being provided on a shroud 36 projecting inward between the removal opening 28 and the cartridge sleeve 31.

[0047] The follower piston 13 without interruptions is unloaded and unconnected with the press head 2 and can thus be arranged inside the cartridge sleeve 27 in such a way that it is removable. The follower piston 13 is therefore sucked purely by the lubricant and does not exert pressure itself.

[0048] In use, the cartridge 4 is thus opened on the top side and the follower piston 13 is inserted into the cartridge 4 on the underside. This causes the filling volume 5 in the cartridge 4 to be closed. After complete emptying of the cartridge 4, the follower piston 13 is in planar contact with the partial area 16 of the closing wall 6 on its top side 15.

[0049] For a lubricant press 1, it is thus proposed to match a follower piston 13 that can be inserted into a cartridge 4 and a closing wall 6 of a cartridge receptacle 3 to one another and to a cartridge 4 in such a manner that the follower piston 13 inside the used up cartridge 4 is in planar contact with the closing wall 6.

LIST OF REFERENCE SIGNS

[0050] 1. Lubricant press [0051] 2. Press head [0052] 3. Cartridge receptacle [0053] 4. Cartridge [0054] 5. Filling volume [0055] 6. Closing wall [0056] 7. Passages [0057] 8. High-pressure chamber [0058] 9. Pressing plunger [0059] 10. Plunger pump [0060] 11. Hand lever [0061] 12. Outlet opening [0062] 13. Follower piston [0063] 14. Open end [0064] 15. Top side [0065] 16. Partial area [0066] 17. Inlet opening [0067] 18. Position [0068] 19. Cartridge insertion direction [0069] 20. Dead volume [0070] 21. Shoulder [0071] 22. Sealing lip [0072] 23. Internal thread [0073] 24. Receiver tube [0074] 25. Collar [0075] 26. Lubricant press set [0076] 27. Cartridge sleeve [0077] 28. Removal opening [0078] 29. Height [0079] 30. Projection [0080] 31. Shoulder surface [0081] 32. Inner surface [0082] 33. End [0083] 34. Check valve [0084] 35. Seal [0085] 36. Shroud [0086] 37. Ring slot