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:
Jan. 30, 2001
Filed:
Aug. 06, 1999
Christine C. Worrel, Madison Heights, MI (US);
Karl Robert Schwarzpech, Windsor, CA;
Debora Nally, Williamsburg, VA (US);
Siemens Canada Limited, Ontario, CA;
Abstract
A method of making air assist passageways and injector pockets in a manifold or air assist rail includes providing a mold that can open and close with several bosses extending from an inside surface. These bosses are arranged in a row and define the inside of the injector pockets when the mold is filled. The air assist passageway that couples the fuel injector pockets is provided by inserting a long pin that passes through the row of injector pocket bosses inside the mold cavity. When the cavity is filled with molten material and solidifies, the pin is withdrawn, leaving a long air assist passageway extending between the injector pockets. The mold is then opened, pulling the injector pocket bosses out of the now-formed injector pockets. The resulting structure is a row of injector pockets in a manifold or air assist rail into which injectors can be inserted, that are connected by a long air assist passageway. Since the pins were inserted through the mold and into the injector pocket bosses, when the pin is withdrawn, holes will be left at the end of the air assist passageways. These holes in the part can be later plugged or capped to prevent air from leaking out of the air assist passageways. The air assist passageway pin preferably intersects the injector pocket bosses in the middle, thereby being supported on all sides by each boss it passes through.