Jacobsen Manufacturing Company

Webster Electric Company, Inc.

Glenn Richard Hubbard

Anthony J Saiia

Donald G Haffner

Frank Allen Ecker

Harold John Jacoby

A hydraulic power circuit for operating hydraulic motors at several speeds includes first and second fluid sources and a valve assembly for combining flow from the second source with flow from the first source as a faster motor speed is required. The valve assembly includes a first valve controlling the flow of fluid from the first source to the motors while a slow motor speed is required. The valve assembly also includes a fluid actuated valve controlling the flow of fluid from the second source to the motors as a faster motor speed is required. The fluid actuated valve is actuated by flow from the first source through metering ducts. Once the fluid actuated valve is actuated, fluid from the second source is mixed with fluid from the first source and the valve assembly communicates the increased flow to the motors thus obtaining a faster motor speed.

Four position valve assembly

A hydraulic system for controlling a gang of lawn mowers including a hydraulic pump and a multi-section valve and hydraulic motors driving the mowers. Hydraulic cylinders are also included in the system, for raising and lowering the mowers, and a check valve is connected with the cylinders for controlling the lowering of the mowers. The main valve is arranged with a plurality of spools which control the aforementioned functions and with the spools being set by means of a single handle so that the operator can perform the aforementioned functions through maneuvering the single handle for each set of hydraulic motors and cylinders. A hydraulic flow restrictor is included in the system for reversing the motors at a speed slower than the forward motor speed, for a slower reverse rotation of the mowers, such as for back-lapping of the mowers.

Growing community of inventors

Racine, WI, United States of America

Glenn Richard Hubbard