US 4,570,900 AGranted

Apparatus for actuating a proportioning valve

AssigneePaul Wurth S.A.

InventorsEmile Lonardi, Victor Kremer

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Abstract

An apparatus for actuating a proportioning valve is presented. The valve consists of a pair of registers, each register having a cut-out portion defining a variable area orifice which is generally symmetrical about a central longitudinal axis through the orifice. The registers are respectively connected to a first and second drive shaft, the drive shafts being mounted about a common axis and being mounted in bearings in a frame such that by pivoting about the common axis, the drive shafts will urge the registers to simultaneously move in opposite directions. Each of the two drive shafts are provided with an arm which are pivotably connected to a tilting lever via a connecting rod. The two tilting levers are mounted on a pivot shaft which is parallel to the common axis of the two drive shafts. The tilting levers are also connected to a driving device, i.e., a hydraulic jack which acts to pivot them about their pivot shaft so that the registers are simultaneously actuated in opposite directions. Preferrably, one of the tilting levers is a substantially straight bar while the other of the tilting levers is a bent bar, the pivot shaft being connected between about the center portion of the straight bar and the bend portion of the bent bar.

Claims7

Dependent claims

An apparatus for actuating a proportioning valve, the valve consisting of a pair of registers, each register having a cut-out portion defining a variable area orifice which is generally symmetrical about a central longitudinal axis through the orifice, the registers being respectively connected to a first and second drive shaft, the drive shaft being mounted coaxially with respect to each other about a common axis including:

first and second arm means, said first arm means being connected to said first drive shaft at a first end thereof and said second arm means being connected to said second drive shaft at a first end thereof;
first and second connecting rod means being pivotably and respectively connected at first ends thereof to second ends of said first and second arm means;
first and second tilting lever means, each tilting lever means being pivotally connected to a second end of said connecting rod means, said lever means being mounted on pivot shaft means, said pivot shaft means being parallel to said common axis of said drive shaft;
said pivotable connection between said first tilting lever means and said first connecting rod means and said pivotable connection between said second tilting lever means and said second connecting rod means being on opposite sides of the plane defined by said common axis and said pivot shaft means;
and
driving means, said driving means urging said first and second tilting lever means to pivot about said pivot shaft means wherein said registers are simultaneously actuated in opposite directions.

3 more elements

Dependencies are inferred from the claim text.