ROBERT AARON YOST, M.D.
Radiology at Metro Blvd, Minneapolis, MN

5223180, Jun 29, 1993

Apr 27, 1992

7/873840

Robert M. Yost - Coon Rapids MN

F01M 1903

261 411

A butterfly type carburetor has a fuel discharge assembly which is operative during high power conditions only, e. g. during sudden acceleration and/or high speed operations. The fuel discharge assembly includes an elongated, hollow discharge tube having a fuel jet coupled to one end with the other end of the discharge tube being located in the airflow passage of the carburetor. A fuel flow guide tube is inserted into the discharge assembly. The guide tube includes an enlarged head located adjacent the fuel jet to take up any space or pocket formed between that jet and the inlet of the longitudinal bore in the discharge tube. The guide tube also includes a cylindrical body which is telescopically received in the internal bore of the discharge tube and extends at least part of the way up the length of the internal bore from the inlet towards the outlet thereof. The guide tube serves to smoothly conduct fuel from the fuel jet into the internal bore of the discharge tube, thereby promoting better fuel atomization, less turbulence in the fuel stream, and better performance from the engine.

6270060, Aug 7, 2001

May 3, 1999

9/303841

Robert M. Yost - Coon Rapids MN

F02M 906

261 443

A carburetor includes a fuel jet having a reciprocal needle received therein for controlling fuel as such fuel flows into an air flow passage of the carburetor. The needle is carried by a reciprocal slide which includes a vent hole in the bottom surface thereof. A rotatable valve plate is carried inside the slide overlying the vent hole. The valve plate is movable between various adjusted positions for changing the size of the vent hole.

5562868, Oct 8, 1996

Mar 16, 1995

8/423018

Robert M. Yost - Coon Rapids MN

F02M 710

261 411

A carburetor has a fuel discharge assembly which is much easier to install than known assemblies. The assembly includes a mounting ring that carries a fuel jet therein with the fuel jet extending radially inwardly relative to the mounting ring. The discharge end of the fuel jet is received in a cylindrical central opening in the mounting ring. The mounting ring is abutted against the side of the carburetor body and is clamped in place by the typical air cleaner assembly that normally abuts to the side of the carburetor body using slightly longer attachment bolts. Thus, the mounting ring is interposed between the inlet end of the airflow passage in the carburetor and the mounting hub of the air cleaner assembly.

5810264, Sep 22, 1998

Oct 16, 1996

8/732183

Robert M. Yost - Coon Rapids MN

F02M 3100

239552

A fuel atomization assembly for a fuel injector includes a mounting member that slips over the end of the fuel injector having the injector nozzle. The mounting member includes a bore aligned with the fuel spray outlet in the nozzle and extending away therefrom. A fuel flow guide tube is received inside the bore, having a lesser diameter than the bore, and being perforated over a portion of its length, to better atomize the fuel stream leaving the injector nozzle. The fuel flow guide tube has an enlarged head sandwiched between the injector nozzle and the inlet to the bore in the mounting member.