Stackpole International Engineered Products, Ltd.

The Gates Corporation

Hans Peter Kutzer

Ralph Valkenberg

Manfred Arnold

Klaus Conno Steffens

Jerry Booen

Haytham Elgamal

Jim Router

Roger Derrick Stone

Abdalhameed Zubeidat

Oliver Böwing

Ian Doble

Gordon Charles Hensley

Oliver Bowing

Disclosed is a pump for dispensing lubricant to a system. The pump includes: a housing having an inlet for inputting lubricant into the housing and an outlet for delivering the lubricant therefrom. A control slide is pivotable about a pivot pin within the housing in a displacement increasing direction and a displacement decreasing direction to adjust pump displacement. A resilient structure biases the control slide in the displacement increasing direction. A pressure relief valve is mounted to the pivot pin and positioned along an outflow path leading pressurized lubricant from the control slide to the outlet. The pressure relief valve is biased in a closing direction and has a pressure receiving surface receiving pressure from the lubricant in the outflow path to urge the pressure relief valve in an opening direction. Opening the relief opening allows outflow of lubricant to relieve pressure in the outflow path.

Pressure relief valve integrated in pivot pin of pump

A variable displacement vane pump has a control slide displaceable within its housing and a first control chamber and a second control chamber for receiving pressurized lubricant. A thermally adjustable control valve is provided in the housing for adjusting pump displacement based on a temperature of the lubricant. In addition to fluid communication channels in the control chambers, at least one vent port is provided in the second chamber. The control valve is configured to control pressure and fluid communication between the chambers along with the control slide. The control valve can help reduce pump displacement at lower temperatures and low engine speeds. At lower temperatures, the second control chamber can be pressurized by the first control chamber. At higher temperatures, the second control chamber can be vented through the control valve and/or the vent port, despite the position of the control slide.

Variable displacement vane pump with thermo-compensation

A variable displacement vane pump has a plurality of seals between the inner surface defining the housing's internal chamber and an outer surface of the control ring. The seals define pressure regulating chambers. A first chamber is defined between a pair of seals located in a circumferential direction of the ring on opposing sides of the pivotal mounting of the ring and has at least one inlet for receiving pressurized fluid. The circumferential extent of the first chamber is greater along a portion for applying force to the ring in a second pivotal direction than along a portion for applying force in the first pivotal direction such that a net force is applied in the second pivotal direction. A second chamber has at least one outlet for receiving pressurized fluid such that the entire circumferential extent of the second chamber applies force to the ring in the second pivotal direction.

Variable displacement pump with multiple pressure chambers where a circumferential extent of a first portion of a first chamber is greater than a second portion

An eccentric pivot arm tensioner capable of automatic belt tensioning and substantially simultaneous operating range indexing during installation. The tensioner comprises a stop plate and cooperating lock plate. The tensioner comprises a pivot arm having a pivot arm member that cooperatively engages a base plate member. In a first, or transit mode, the pivot arm member temporarily engages the base plate member to put a torsion spring and thereby the pivot arm in a preloaded condition. The lock plate is engaged with the stop plate. As a mounting fastener is engaged into a mounting surface the pivot arm member is automatically disengaged from the base plate member by an axial movement of the pivot arm, thereby allowing the pivot arm to rotate and thereby impart a torsion spring force to a belt, i.e., tensioning the belt in an operating position. During the initial movement the lock plate remains engaged with the stop plate thereby causing the lock plate to rotate with the pivot arm, which automatically and properly indexes the pivot arm movement travel stop members with respect to the lock plate, thereby automatically setting a working range. As the fastener is then fully torqued down, the lock plate is fully disengaged from the pivot arm and yet fixed in position to allow full operation of the pivot arm in the operating range.

Eccentric pivot arm tensioner

Growing community of inventors

Gangelt, Germany

Hans Peter Kutzer