Ejection device

• US 20090314809A1
• Filed: 06/17/2009
• Published: 12/24/2009
• Est. Priority Date: 06/19/2008
• Status: Abandoned Application

• Current Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Original Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Inventors: Stobel-Schmidt, Rainer, Hefele, Christian, Lederle, Hans Peter, Ostermeier, Peter
• Application Number:
  US12/456,545
• Publication Number:
  US 20090314809A1
• Time in Patent Office: Days
• US Class Current: 222/392
• CPC Class Codes: B05C 17/00553 with means allowing the stock of material to consist of at least two different components
• CPC Class Codes: B05C 17/00596 The liquid or other fluent material being supplied from a rigid removable cartridge having no active dispensing means, i.e. the cartridge requiring cooperation with means of the handtool to expel the material
• CPC Class Codes: B05C 17/0103 with electrically actuated piston or the like
• CPC Class Codes: B05C 17/0116 characterised by the piston driving means B05C17/0103, B05C17/0109, B05C17/0113, B05C17/015 take precedence
• CPC Class Codes: B05C 17/0123 Lever actuated

Abstract

An ejection device (11) for compound-containing containers (6) has a receptacle (12) for the container (6) and two piston rods (21) having a pressure transmitting element (23) at its end (22) facing the receptacle (12). The ejection device (11) also has a displacement unit (31) for displacing the piston rods (21) in direction of the receptacle (12) and includes a drive (41) and a displacement device (51) having a retraction element (52), and the drive (41) having a drum unit (61) with a rotating member (62) for the retraction element (52). The retraction element (52), is secured, on one hand, in a region of an end (24) of the piston rods (21) remote of the receptacle (12) and, on the other hand, is wound onto the rotating member (62) of the drum unit (61).

Claims

1. An ejection device for compound-containing containers (6), comprising a receptacle (12) for a container (6);

at least one piston rod (21) having pressure transmitting means (23) at an end (22) thereof facing the receptacle (12);

a displacement unit (31) for displacing the at least one piston rod (21) in direction of the receptacle (12) and including a drive (41;

116), and a displacement device (51), wherein the displacement device (51) has at least one retraction element (52), and the drive (41;

116) has a drum unit (61;

121) with a rotating member (62;

122) for the at least one retraction element (52), the retraction element (52), on one hand, being secured in a region of an end (24) of the at least one piston rod (21) remote from the receptacle (12) and, on the other hand, being wound up onto the rotating member (62;

122) of the drum unit (61;

121).

2. An ejection device according to claim 1, wherein the retraction element (52) is a pliable belt.

3. An ejection device according to claim 1, wherein the displacement device (51) has a displacement claw (64) with a force transmission surface which can be brought into contact with the rotating member (62) for transmitting a displacement generated by the drive (41).

4. An ejection device according to claim 1, wherein the displacement device (51) has a holding claw (71) with a contact surface which can be brought into contact with the rotating member (62) for holding the rotating member (62) in a position.

5. An ejection device according to claim 4, wherein a toothing (65) is provided on at least one of the force transmission surface of the displacement claw (64) and the contact surface of the holding claw (71) and engages in a toothing (63) provided on a radial outer side at the rotating member (62) of the drum unit (61).

6. An ejection device according to claim 3, wherein the force transmission surface of the displacement claw (64) has a longitudinal extension (L1) over an angular area of 10°

to 90°

with respect to the circumference of the rotating member (62) of the drum unit (61).

7. An ejection device according to claim 4, wherein the contact surface of the holding claw (71) has a longitudinal extension (L2) over an angular area of 10°

to 90°

with respect to the circumference of the rotating member (62) of the drum unit (61).

8. An ejection device according to claim 4, wherein at least one of the displacement claw (64) and the holding claw (71) is pretensioned in direction of the rotating member (62) of the drum unit (61).

9. An ejection device according to claim 1, comprising a release device (81) for releasing the drum unit (61).

10. An ejection device according to claim 8, wherein in a release position of the release device (81), at least one of the displacement claw (64) and the holding claw (71) is disengaged from the rotating member (62) of the drum unit (61).

11. An ejection device according to claim 10, wherein a protruding cam (70 and 76) is provided on the at least one of the displacement claw (64) and at the holding claw (71), and can be brought into contact with a correspondingly shaped control cam (84 and 85) of the release device (81) to guide the at least one of the displacement claw (64) and the holding claw (71) when the release device (81) is actuated.

12. An ejection device according to claim 10, wherein the release device (81) has a resetting element (86) for moving the release device (81) into a position in which the at least one of the displacement claw (64) and the holding claw (71) are in contact with the rotating member (62) of the drum unit (61).

13. An ejection device according to claim 1, wherein the drive (41) includes a manually actuated actuation lever (43) for rotating the rotating member (62) of the drum unit (61).

14. An ejection device according to claim 1, wherein the drive (116) includes a motor (112) for rotating the rotating member (122) of the drum unit (121).