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. 20, 1994
Filed:
Mar. 30, 1993
Kone Oy, Helsinki, FI;
Abstract
The invention relates to a procedure and an apparatus for feeding solid material into a pressurized space. According to the invention, the apparatus comprises a feed chamber (12) communicating with the pressurized space (1) via a gate (13), a piston cylinder (8) adjoining the feed chamber (12) and provided with an aperture (28) in its wall for the intake of solid material, and a piston (9) which consists of an inner and an outer piston (11,10), moves within the piston cylinder (8) and closes the feed chamber (12) tightly when in its front position. The inner piston (11) moves inside the outer piston (10) and in the feed chamber (12) to insert the solid material into the pressurized space (1). In the procedure of the invention, the solid material is supplied into the feed chamber (12) through the piston cylinder (8) and the aperture (28) in its wall while the piston (9) is in its rear position, the piston (9) is thrust into its front position so that the feed chamber (12) is tightly closed, a pressure corresponding to that in the pressurized space (1) is formed in the feed chamber (12), the gate (13) between the pressurized space (1) and the feed chamber (12) is opened and the inner piston (11) is thrust into its front position.