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:
Dec. 17, 1991
Filed:
Jan. 15, 1991
Esko Lopperi, Jyvaskyla, FI;
Safematic Ltd., Muurame, FI;
Abstract
The invention relates to an arrangement in a mechanical seal. The mechanical seal comprises a seal member to be attached to a rotating machine part and provided with a slide ring; and a static seal member to be attached to a stationary machine part and provided with a slide ring. The mechanical seal further comprises connections for supplying flushing liquid to the seal and for discharging it from the seal; and a secondary seal arranged to seal the gap between the rotating machine part and the static seal member. In order to achieve a simple seal reliable in operation, a choke is formed in the flow conduit of the supply connection for flushing liquid, the choke communicating by means of a suction connection with a space receiving the flushing liquid leaking across the secondary seal. The flushing liquid flowing in the supply connection creates, in a manner known per se, a vacuum in the choke, which vacuum is arranged to suck the flushing liquid leaking across the secondary seal through the suction connection into the supply connection.