Richard A Schultz

US Patent:

46051970, Aug 12, 1986

Filed:

Jan 18, 1985

Appl. No.:

6/692586

Inventors:

Gerald F. Casey - Portage MI
Richard A. Schultz - Portage MI

Assignee:

Fema Corporation - Kalamazoo MI

International Classification:

F16K 3142

US Classification:

251 3001

Abstract:

A proportional pressure control device having a motor with a housing and a reciprocably movable armature oriented in the housing for movement between first and second limit positions. A valve body is secured to the motor housing. A platelike poppet valve member is secured to the armature on at least one end thereof. The valve body has a fluid pressure port thereon and it extends into the interior of the valve body to a chamber. A flow restrictor device is provided in the pressure port to restrict fluid flow from an external pressure source into the pressure port and the chamber. A nozzle outlet structure is provided in the chamber and has an annular flat valve seat thereon directly opposing the poppet valve member. The spacing between the valve seat and the poppet valve member effects a controlling of the magnitude of the fluid pressure developed in the chamber. Structure is provided for effecting a movement of the armature in a manner that is substantially proportionally related to the current signal between a position of the armature at the aforesaid first limit position and a position of the one side of the poppet valve member whereat it engages the valve seat.