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:
Jun. 11, 2019
Filed:
Dec. 26, 2017
Nederman Holding Ab, Helsingborg, SE;
Bartosz Kowalski, Warsaw, PL;
Jacek Czyzewski, Gdansk, PL;
Christian Norman, Furulund, SE;
Klaus Bihlet, Randers NĂ–, DK;
NEDERMAN HOLDING AB, Helsingborg, SE;
Abstract
A back pressure flap valve arrangement is disclosed. The arrangement comprises a housing () having an inlet opening () and an outlet opening () adapted for connection of the housing () to a ducting (), and at least one side wall () extending along a flow direction through the housing () from the inlet opening () to the outlet opening (). A flap () is pivotably hinged about a shaft () thereby being movable between an open position and a closed position, said shaft () extending transverse the flow direction. At least one locking device () is fixedly mounted to the side wall () and comprises a locking pin () and a stopping member (). The locking pin () is movable between a retracted position and a locking position, and being biased towards said locking position. The stopping member () is movable from a stop position in which the stopping member () is adapted to hold the locking pin () in its retracted position, to a release position by the flap () acting on the stopping member () in case of a back pressure. Thereby the locking pin () is allowed to move into the locking position in which the locking pin () maintains the flap () in the closed position.