EP 0888824 B1 20030219 - Manual pump with a free sleeve piston
Title (en)
Manual pump with a free sleeve piston
Title (de)
Handbetätigte Pumpe mit einem mit einer Manchette versehenen freien Kolben
Title (fr)
Pompe manuelle à piston libre à manchette
Publication
Application
Priority
FR 9708526 A 19970704
Abstract (en)
[origin: EP0888824A1] The manual pump body defines a pump chamber with an inlet valve. A hollow activating rod which moves between rest and pushed positions is assisted into its rest position by a return spring. The rod has an internal return pumping channel. A free piston slides in the pump body on the activating rod. The rod has a stop surface (223) with which the piston engages during sliding upwards in order to create a seal at this point. An oversleeve (30) surrounding the activating rod has a lower end (32) in sealed contact at rest with the rod to form the outlet valve and an upper end engaging the rod stop surface during upwards sliding. The friction forces exerted between the piston and the pump body are greater than the friction forces exerted between the piston and the activating rod.
IPC 1-7
IPC 8 full level
B05B 11/00 (2006.01)
CPC (source: EP)
B05B 11/1023 (2023.01)
Designated contracting state (EPC)
CH DE ES FR GB IE IT LI
DOCDB simple family (publication)
EP 0888824 A1 19990107; EP 0888824 B1 20030219; DE 69811431 D1 20030327; DE 69811431 T2 20040115; ES 2192751 T3 20031016; FR 2765638 A1 19990108; FR 2765638 B1 20041126; TW 393428 B 20000611
DOCDB simple family (application)
EP 98401668 A 19980703; DE 69811431 T 19980703; ES 98401668 T 19980703; FR 9708526 A 19970704; TW 87110824 A 19980704