The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 1990
Filed:
May. 16, 1989
Siegfried Kiske, Gronau, DE;
Thorsten Haase, Molln, DE;
Thomas Leyer, Lubeck, DE;
Wolfgang Sauer, Lubeck, DE;
Dragerwerk Aktiengesellschaft, Lubeck, DE;
Abstract
The invention is directed to a pumping arrangement for supplying a ventilating apparatus with breathing gas. The pumping arrangement includes a piston which runs in a cylinder and the piston is connected via a coupling with a drive unit for generating the pumping strokes. The coupling engages a motion transmitter in the form of a piston rod. Gas connecting ports for the breathing gas to be pumped open into the inner chamber of the cylinder. The pumping arrangement permits the piston-cylinder unit to be simply removed and to be reinstalled with reliable guidance. An automatic latching occurs such that a release and removal of the piston-cylinder unit from the ventilating apparatus and its uncoupling from the drive unit is possible only in a rest condition and not during operation. For exchanging the piston-cylinder unit, the motion actuator in the form of the piston rod moves through a preparatory stroke having an end position in which the coupling as well as the latching of the piston-cylinder unit with respect to the housing can be actuated.