Discharger for a flowable medium

• US 20070210114A1
• Filed: 03/12/2007
• Published: 09/13/2007
• Est. Priority Date: 03/13/2006
• Status: Active Grant

• Current Assignee: Aptar Radolfzell GmbH (AptarGroup Incorporated)
• Original Assignee: Ing. Erich Pfeiffer GmbH
• Inventors: Greiner-Perth, Juergen, Stadelhofer, Peter, Cater, Miro
• Granted Patent: US 8,006,870 B2
• Time in Patent Office: Days
• US Class Current: 222/335
• CPC Class Codes: B05B 11/0067 having a valve seat located downstream the valve element (take precedence)
• CPC Class Codes: B05B 11/007 being opened by deformation of a sealing element made of resiliently deformable material, e.g. flaps, skirts, duck-bill valves
• CPC Class Codes: B05B 11/0072 A valve member forming part of an outlet opening
• CPC Class Codes: B05B 11/1002 the direction of the pressure stroke being substantially perpendicular to the major axis of the container B05B11/1009, B05B11/1015 take precedence
• CPC Class Codes: B05B 11/1015 actuated without substantial movement of the nozzle in the direction of the pressure stroke B05B11/1011 takes precedence
• CPC Class Codes: B05B 11/1016 the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element B05B11/1022, B05B11/1023 take precedence
• CPC Class Codes: B05B 11/1047 the pump being preassembled as an independent unit before being mounted on the container
• CPC Class Codes: B05B 11/105 Sealing arrangements around pump actuating stem
• CPC Class Codes: B05B 11/106 in a retracted position, e.g. in an end-of-dispensing-stroke position

Abstract

1. Discharger.

2.1. The invention relates to a discharger for a flowable medium, having a pumping device (40) comprising a pumping chamber (46) which is closed off on one side by a longitudinally movable piston (50).

2.2 According to the invention, the pumping chamber (46), on the piston side, is hermetically sealed against an environmental atmosphere outside the discharger by means of a gas-impermeable and at least partially flexible diaphragm (34), the diaphragm (34), in its marginal region (36), being fixedly connected to a housing (10) of the discharger. 2.3 Use for a discharger having high sealing requirements against the ingress of impurities.

Claims

1. Discharger for a flowable medium, having a pumping device (40;

140;

340) comprising a pumping chamber (46;

146;

246;

346) which is closed off on one side by a longitudinally movable piston (50;

150;

250;

350), characterized in that the pumping chamber (46;

146;

246;

346), on the piston side, is hermetically sealed against an environmental atmosphere outside the discharger by means of a gas-impermeable and at least partially flexible diaphragm (34;

50;

234;

347), the diaphragm (34;

50;

234;

347), in its marginal region (36;

154), being fixedly connected to a housing (10;

110) of the discharger.

2. Discharger according to claim 1, characterized in that the diaphragm (34;

234;

347) is connected to an actuating device (30;

230;

350) operatively connected to the piston (50;

250;

350).

3. Discharger according to claim 2, characterized in that the diaphragm (34;

234;

347) is configured in one piece with the actuating device (30;

230;

350).

4. Discharger according to claim 1, characterized in that the diaphragm (150;

347) is connected to the piston (150;

350).

5. Discharger according to claim 4, characterized in that the diaphragm (150;

347) is configured in one piece with the piston (150;

350).

6. Discharger according to claim 1, characterized in that the diaphragm is provided as a separate component between the piston and the pumping chamber.

7. Discharger according to claim 1, characterized in that the piston (50;

150;

250;

350) is longitudinally movable in a piston direction (90;

190;

290;

390) which forms a right angle with a principal direction of extent (92;

192;

292) of the discharger.

8. Discharger according to claim 1, characterized in that an inlet duct (344;

144) and/or an outlet duct (344) are disposed in the pumping chamber (146;

346) on the side facing away from the piston (150;

350).

9. Discharger according to claim 8, characterized in that, on the piston side, an actuating element (152;

351) is provided which, depending on the piston position, is operatively connected to the inlet duct (344;

144) or the outlet duct (344), the operative connection comprising, in particular, an opening or closing of the inlet duct (344;

144) or of the outlet duct (344).