Patent ID: 6837485
Filing Date: 2005-01-04
Classification: F02M,F16K,Y10T

Abstract:
1. A flow quantity control valve comprising: a housing internally comprising a first fluid passage and a second fluid passage; a valve seat within the housing; a valve disk provided engageably and disengageably with the valve seat; a valve stem holding the valve disk; a valve spring energizing the valve stem in a direction along which the valve disk engages with the valve seat; a driving means for moving the valve stem in a direction along which the valve disk disengages from the valve seat against an energizing force of the valve spring; a first spring holder fixed on the valve stem and holding a first end of the valve spring; and a second spring holder fixed within the housing and holding a second end of the valve spring, wherein the second spring holder is a substantially cylindrical element comprising a circular bottom and a stay portion extending from the periphery of the circular bottom, and wherein the stay portion surrounds the valve spring.