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:
Nov. 23, 1999
Filed:
Apr. 24, 1998
Gustav Schumacher, 57612 Eichelhardt, DE;
Other;
Abstract
A coupling sleeve (1) for a hydraulic coupling has a member to receive and arrest a coupling plug. To open the plug valve of the coupling plug, a switching pin (16) is provided which passes through the valve body (9) of the coupling sleeve (1). In the open position, the pin (16) projects beyond the end face (12) into the receiving means (6). If the switching member (30) is opened by mistake, and it is to be returned to its closed position, the switching pin (16) must move into the starting position against the pressure in the sleeve chamber (37). To accomplish this movement, the switching pin (16) has an opening valve. The opening valve has an opening valve body (21) arranged in a through-channel (17) in the switching pin (16). The through-channel effects a connection between the receiving means (6) and the sleeve chamber (37) when the switching member (30) is returned into a closed position. Thus, the switching member (30) is able to return against the pressure building up in the sleeve chamber (37).