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. 31, 1985
Filed:
Jun. 04, 1984
Mark F Spaulding, Rockville Center, NY (US);
Richard A Goehring, Huntington Station, NY (US);
METCO Inc., Westbury, NY (US);
Abstract
A powder feeding system for a thermal spray gun provides uniform control of powder feed rate with a minimum of pulsation during operation and without feeding during idle mode. The feeder is comprised of an enclosed hopper for containing a powder to be thermal sprayed, a carrier conduit connected between a carrier gas supply and a thermal spray gun, a feed gas conduit for discharging a regulated supply of feed gas under pressure into the hopper, and one or preferably more powder intake orifices extending from the carrier conduit into the hopper below the normal minimum level of powder. The intake conduits have a geometric design and arrangement such that there is no gravity flow of powder therethrough into a carrier gas stream in the absence of a feed gas flow therethrough. The axes of the intake orifices extend away from the carrier conduit at an acute angle to the axis of the carrier conduit as defined by the direction of carrier gas flow. Preferably there is a constriction in the carrier conduit downstream of the intake orifices.