Steven J Zumbusch

US Patent:

7165396, Jan 23, 2007

Filed:

Jul 11, 2003

Appl. No.:

10/618417

Inventors:

Steven J. Zumbusch - Chanhassen MN, US

Assignee:

Eaton Corporation - Cleveland OH

International Classification:

F04B 49/22
F16D 31/02

US Classification:

60430, 60486

Abstract:

A tandem pump assembly of the type including a housing (H), disposed in which is a first pump (), driven by an input shaft (), and a second pump (), also driven by the input shaft (). The assembly is characterized by the tandem pump assembly including pressure override valve means () associated with only the first pump (), and operable, in response to a fluid pressure at a fluid outlet port () in excess of a pressure override setting (), to communicate pressurized fluid to a first fluid pressure responsive means (), in a manner tending to decrease the displacement of the first pump () without effecting the displacement of the second pump (), until said fluid pressure is substantially equal to the pressure override selling (), even if it is necessary for the first pump () to go over-center from its initial displacement.

US Patent:

20060090588, May 4, 2006

Filed:

Nov 3, 2004

Appl. No.:

10/980089

Inventors:

Steven Zumbusch - Chanhassen MN, US

Assignee:

EATON CORPORATION - Cleveland OH

International Classification:

G05G 1/10

US Classification:

074543000

Abstract:

A control assembly adapted for use on a vehicle to be controlled in response to variations in first and second control signals, comprising a stationary mounting member and a handle () adapted to be held in the hand of an operator. The handle is moveable in forward and reverse directions to generate the first signal and is moveable in left and right directions to generate the second signal. The control assembly comprises an elongated connector member () which by itself, or in cooperation with one of the stationary mounting member () and the handle, defines a first pivot axis (A). When the handle is held in a normal manner in the hand of an operator, the first pivot axis (A) is oriented generally perpendicular to the arm of the operator, and approximately intersects one of the hand and the arm of the operator.

US Patent:

20100206116, Aug 19, 2010

Filed:

Jan 20, 2010

Appl. No.:

12/690140

Inventors:

Steven J. Zumbusch - Chanhassen MN, US

Assignee:

EATON CORPORATION - Cleveland OH

International Classification:

G05G 9/047

US Classification:

74471XY

Abstract:

A control assembly adapted for use on a vehicle to be controlled in response to variations in first and second control signals, comprising a stationary mounting member and a handle () adapted to be held in the hand of an operator. The handle is moveable in forward and reverse directions to generate the first signal and is moveable in left and right directions to generate the second signal. The control assembly comprises an elongated connector member () which, by itself, or in cooperation with one of the stationary mounting member () and the handle, defines a first pivot axis (A). When the handle is held in a normal manner in the hand of an operator, the first pivot axis (A) is oriented generally perpendicular to the arm of the operator, and approximately intersects one of the hand and the arm of the operator.

US Patent:

20100206117, Aug 19, 2010

Filed:

Jan 20, 2010

Appl. No.:

12/690141

Inventors:

Steven J. Zumbusch - Chanhassen MN, US

Assignee:

EATON CORPORATION - Cleveland OH

International Classification:

G05G 9/047

US Classification:

74471XY

Abstract:

A control assembly adapted for use on a vehicle to be controlled in response to variations in first and second control signals, comprising a stationary mounting member and a handle () adapted to be held in the hand of an operator. The handle is moveable in forward and reverse directions to generate the first signal and is moveable in left and right directions to generate the second signal. The control assembly comprises an elongated connector member () which by itself, or in cooperation with one of the stationary mounting member () and the handle, defines a first pivot axis (A). When the handle is held in a normal manner in the hand of an operator, the first pivot axis (A) is oriented generally perpendicular to the arm of the operator, and approximately intersects one of the hand and the arm of the operator.

US Patent:

61961094, Mar 6, 2001

Filed:

Nov 16, 1998

Appl. No.:

9/193322

Inventors:

Steven J. Zumbusch - Chanhassen MN
Benjamin M. Hoxie - St. Paul MN
Maynard W. Marts - Bloomington MN

Assignee:

Eaton Corporation - Cleveland OH

International Classification:

F01B 3100

US Classification:

91 65

Abstract:

A hydraulic unit of the type including a cylinder block (19) rotatably disposed adjacent a valve plate (51;61) having inlet ports 41a, 41b, and 41c, and further having outlet ports 43a, 43b, and 43c. Disposed between the individual inlet and outlet ports are web portions, having nominal cross-sections and flow restrictions. In one embodiment (FIG. 3), there is a modified web portion (55) toward the trailing end of the outlet port, and in the other embodiment (FIG. 7), there is a modified web portion (65) toward the leading end of the outlet port. In either case, the web portion has its cross-section or flow restriction modified to move the resultant force on the swashplate (33) in a direction tending to reduce the moments on the swashplate, and therefore, reduce the operator effort required to move or maintain the control lever.

US Patent:

51453487, Sep 8, 1992

Filed:

May 15, 1991

Appl. No.:

7/700295

Inventors:

Steven J. Zumbusch - Eden Prairie MN

Assignee:

Eaton Corporation - Cleveland OH

International Classification:

F04C 1502

US Classification:

418171

Abstract:

A gerotor pump is disclosed of the fixed-axis type, including an outer rotor (33) and an inner rotor (35). The gerotor is driven by a drive shaft (25) through a driver (51) including a pair of drive members (57), each having a cylindrical drive surface (59). The inner rotor (35) defines a pair of diametrically opposed recesses (61), each including a driven surface (63). With the drive members engaging the driven surfaces, the inner rotor is permitted to deviate from perfect concentricity with the drive shaft to the extent necessary to result in minimum torque input to drive the rotors, without binding occurring between the rotors, as typically occurs if the inner rotor is forced to remain concentric with the drive shaft.

US Patent:

44913320, Jan 1, 1985

Filed:

Nov 7, 1983

Appl. No.:

6/549053

Inventors:

Steven J. Zumbusch - Eden Prairie MN

Assignee:

Eaton Corporation - Cleveland OH

International Classification:

F16J 1532

US Classification:

277152

Abstract:

A shaft seal assembly (55) for use in a rotary fluid pressure device. The device includes a housing (51) and a rotary shaft (31). The shaft seal assembly (55) includes an elastomeric sealing element (65), an inner support member (67) and an outer support member (69). The sealing element (65) includes a cushion portion (81) disposed radially between the inner and outer support members to cushion radial movement of the inner support member when the shaft moves radially. The sealing element (65) includes a sealing lip (71) defining a pivot point (83) and the inner support member extends rearwardly of the pivot point (83), whereby radial movement of the inner support member results in corresponding radial movement of the sealing lip (71), reducing the loading on the lip.

US Patent:

46132929, Sep 23, 1986

Filed:

Feb 1, 1985

Appl. No.:

6/697596

Inventors:

Marvin L. Bernstrom - Eden Prairie MN
Steven J. Zumbusch - Eden Prairie MN

Assignee:

Eaton Corporation - Cleveland OH

International Classification:

F03C 208
F04C 210
B60K 17356
F16D 4100

US Classification:

418 61B

Abstract:

A rotary fluid pressure device is provided of the type in which a valve spool (47) is axially movable within a spool bore (35). In the normal operating position of the valve spool (47), torque output is transmitted from the gerotor gear set (17) by means of a main drive shaft 53 through one spline connection (51, 49) then through a second spline connection (49, 75) to the output device. The valve spool (47) may be moved axially to a position in which the second spline connection (49, 54) is disengaged, and the device operates in a free-wheel mode. The valve spool (47) may also be moved axially to a position in which a set of teeth (71) on the valve spool engage a set of teeth (69) on the stationary housing, such that the device operates in a locked mode.