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:
Jan. 01, 1985
Filed:
May. 21, 1982
Ludwig Axthammer, Hambach, DE;
Felix Wossner, Schweinfurt, DE;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
In a pressurized fluid device a cavity is defined within a container. A piston rod passes through a piston rod guide and seal unit of the container. The piston rod guide and seal unit has an axially inner and an axially outer sealing element sealingly engaging the piston rod. The axially inner sealing element acts as a check valve permitting flow of fluid towards the cavity and preventing flow of fluid out of the cavity. An intermediate chamber is defined between the axially inner and the axially outer sealing element around the piston rod. A filling passage is provided across the piston rod guide and sealing unit. This filling passage includes an axially outer filling passage section across the axially outer sealing element between the intermediate chamber and the exterior of the pressurized fluid device.