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:
Aug. 02, 1983
Filed:
Apr. 14, 1982
Hans-Jurgen Dettbarn, Marburg, DE;
Josef Zimmermann, Sulzbach, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
In this injection instrument, the piston pump (A) is connected to a drive motor (B), of which the working piston (5) supported on a working spring (2) is arranged displaceably in a cylindrical bore (6) of the motor housing (1). A pressure chamber (7) which has supply devices (3, 8) and discharge devices (4, 9) for pressure medium is formed in the bore (6). To ensure that the pressure medium cannot be simultaneously supplied to and discharged from the pressure chamber (7), there is a control shaft (37) which is assigned to valves (8 and 9). The control shaft (37) is provided with a lever (38) and has segment-like recesses (39, 40) which interrupt the engagement of the valves (8, 9) with the control shaft (37). The recesses (39, 40) are arranged on the control shaft (37) so that the valves are not engaged simultaneously with the control shaft (37).