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. 24, 1999
Filed:
May. 05, 1998
Bodo Hildebrandt, Riedstadt, DE;
Wella Aktiengesellschaft, Darmstadt, DE;
Abstract
The valve device includes a valve body (3) having an interior chamber (12) and slidably mounted in an outer housing (18) provided with a first gas passage (19) for compressed gas and a second gas passage (20) connectable with the first gas passage (19) when the valve body is in its lower position; a hollow valve stem (4) slidably mounted in the valve body (3) and provided with a lateral opening (11) connecting the hollow valve stem (4) with the interior chamber (12) when the valve stem (4) is in its upper position relative to the valve body; a first seal (10) sealing the interior chamber (12) and the valve body (3) and a second seal (22) provided on an outer periphery of the valve body (3) acting to seal the interior chamber (12) from compressed gas when the valve body (3) is in its upper position. The second gas passage (20) is connected with the first gas passage (19) and with interior chamber (12) in the lower position of the valve body (3). The opening (11) is positioned in the valve stem (4) so that, when the stem (4) is depressed, compressed gas is supplied through the first gas passage (19) and the then connected second gas passage (20) into the interior chamber (12), so that the stem (4) is cleaned by compressed gas flowing through the lateral opening (11) from the interior chamber (12) only when the hollow stem (4) is returned to its upper position.