DR. JUSTIN RHOADS
Pharmacy at La Cholla Blvd, Tucson, AZ
License number
Arizona S015571
Category
Pharmacy
Type
Pharmacist
Address
Address
7635 N La Cholla Blvd, Tucson, AZ 85741
Phone
(520) 297-0840
Professional information
Adjustable Fast Bleed Lifter
US Patent:
7131411, Nov 7, 2006
Filed:
Mar 7, 2005
Appl. No.:
11/074117
Inventors:
Jack L. Rhoads - Tucson AZ, US
Justin D. Rhoads - Tucson AZ, US
Justin D. Rhoads - Tucson AZ, US
International Classification:
F01L 1/14
US Classification:
123 9057, 123 9048, 123 9055
Abstract:
A limited leak-down variable duration lifter and its adjustment is provided to maximize performance gains at low engine rpm when used with a conventional cam and more particularly with a conventional hi-performance camshaft. The increased performance gains were here-to-for unobtainable with conventional variable duration lifters and the conventional adjustment. By utilizing an adjustable valve train to precisely position the plunger of an accelerated leak variable duration lifter near the bottom of its travel, optimum reductions of lift and duration are achieved without exceeding amounts that would be detrimental to the engine and its valve train. To maintain proper rocker arm geometry, the plunger is positioned closer to its seat in the assembled state by either reengineering the internal dimensions of the lifter, or by providing a spacer or spacers between the plunger and the push rod cup, or plunger and seat.