Norgren Automotive, Inc.

Michael J Golden

Kenneth Paul Dellach

A method for generating and controlling the source of vacuum produced from a source of pressurized air in communication with at least one vacuum responsive device wherein the present invention maintains the operating conditions of the system during the loss and resumption of power. The present invention provides at least one venturi for creating a vacuum through a flow of pressurized air. The present invention selectively provides a flow of pressurized air from a pressurized air source to the vacuum creating means and selectively provides a flow of pressurized air to the vacuum responsive device. A last function valve communicates with the selective providing of pressurized air to maintain the operating condition of the vacuum responsive device during the loss and resumption of power.

Method for maintaining the operating condition of a vacuum responsive device during loss and resumption of power

A vacuum control apparatus for generating and controlling the source of vacuum produced from a source of pressurized air in communication with at least one vacuum responsive device wherein the vacuum control apparatus maintains the operating conditions of the system during the loss and resumption of power. The vacuum control apparatus provides at least one venturi for creating a vacuum through a flow of pressurized air. A first valve train selectively provides a flow of pressurized air from a pressurized air source to the vacuum creating means. A second valve train communicates with the pressurized air source to selectively provide a flow of pressurized air to the vacuum responsive device. A last function valve communicates with the first and second valve trains and a pressurized air source to maintain the operating condition of the vacuum control apparatus during the loss and resumption of power to the first and second valve trains.

Vacuum control apparatus for maintaining the operating condition of a vacuum responsive device during loss and resumption of power

A sensor detects the absolute angular position of a rotatable clamp arm between full opened and full closed positions. The sensor is coupled to a clamp arm pivot shaft to provide output signals corresponding to the absolute position of the clamp arm. One or more programmable angular position set points are setable at angular positions in advance of the full open and full closed positions of the clamp arm. Outputs are generated when the clamp arm reaches and/or exceeds each set point.

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Sterling Hts., MI, United States of America

Michael J Golden