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:
Sep. 10, 1991
Filed:
Mar. 14, 1990
Felix Ams, Kampfelbach, DE;
Manfred Baier, Bretten, DE;
Richard Wolf GmbH, Knittlingen, DE;
Abstract
Equipment is disclosed for the controlled insufflation of a fluid into a body cavity through a probe inserted thereinto, particularly for insufflating gas through the conduit of an endoscope partly inserted into the body cavity. The equipment comprises a supply device for delivering the fluid and on which a selected nominal value for the pressure in the body cavity can be set and the relevant actual value of the body cavity pressure can be displayed by means of a measuring instrument. The inlet side of a circulating pump, is connected by way of a filter to the body caviy. During an operation the pump draws off fluid from the body cavity and circulates it back to the body cavity. Part of the circuit on the delivery side of the pump and part of the circuit leading to the measuring instrument have a common portion leading to the body cavity. When the pump is running, therefore, a retroactive dynamic pressure is applied to the measuring instrument. The dynamic pressure is compensated for by a partial vacuum derived from the delivery flow of the pump.