Glenn R Hubbard

Address:

31871 W Treasure Is Dr, Hartland, WI 53029

Phone:

2623677707

VIN:

4JGBF22E87A257984

Make:

MERCEDES-BENZ

Model:

GL-CLASS

Year:

2007

US Patent:

39928586, Nov 23, 1976

Filed:

Dec 1, 1975

Appl. No.:

5/636697

Inventors:

Glenn Richard Hubbard - Racine WI
Harold John Jacoby - Racine WI
Frank Allen Ecker - Racine WI
Donald Gene Haffner - Milwaukee WI
Anthony Joseph Saiia - Milwaukee WI

Assignee:

Jacobsen Manufacturing Company - Racine WI

International Classification:

A01D 3524

US Classification:

56 7

Abstract:

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.

US Patent:

40891712, May 16, 1978

Filed:

May 24, 1976

Appl. No.:

5/689573

Inventors:

Glenn R. Hubbard - Racine WI

Assignee:

Webster Electric Company, Inc. - Racine WI

International Classification:

F16D 3102

US Classification:

60486

Abstract:

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.