Donald G Gruett

7118352, Oct 10, 2006

Sep 17, 2003

10/664094

Donald G. Gruett - Manitowoc WI, US
Michael J. Wech - Manitowoc WI, US

Oil-Rite Corporation - Manitowoc WI

F04B 17/00
F04B 53/12

417225, 417392, 417552, 417570

The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by an evacuation valve. The piston is driven forwardly through a working stroke to force the liquid medium in the metering chamber out of the chamber and past the evacuation valve. A check valve located in the metering chamber moves from a closed to an open position on each working stroke to preclude entrapment of air in the metering chamber and thus provide for more accurate metering. The metering device may include means to regulate the length of the working stroke.

7600984, Oct 13, 2009

Aug 15, 2006

11/504149

Donald G. Gruett - Manitowoc WI, US
Michael J. Wech - Manitowoc WI, US

Oil-Rite Corporation - Manitowoc WI

F04B 35/00

417375, 417392, 417399, 417401, 417547, 417552, 417570

The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by an evacuation valve. The piston is driven forwardly through a working stroke to force the liquid medium in the metering chamber out of the chamber and past the evacuation valve. A check valve located in the metering chamber moves from a closed to an open position on each working stroke to preclude entrapment of air in the metering chamber and thus provide for more accurate metering. The metering device may include means to regulate the length of the working stroke.

45777284, Mar 25, 1986

Dec 5, 1984

6/678359

Donald G. Gruett - Manitowoc WI

Oil Rite Corporation - Manitowoc WI

F16N 2700
F15D 100

184 74

A metering valve for the drop feeding of a liquid lubricant includes a metering assembly disposed in a valve chamber having an inlet and an outlet. The metering assembly includes a cylindrical member having a peripherally disposed spiral groove. A sleeve is press fit on the cylindrical member to render the groove a closed spiral metering channel. The metering channel communicates with an outlet in the cylindrical member that is generally aligned with the chamber outlet. An O-ring seal surrounds the aligned outlets and is disposed between the floor of the chamber and the metering assembly to preclude passage of lubricant from the chamber except by passage through the metering assembly.

61649244, Dec 26, 2000

Sep 1, 1998

9/144909

Donald G. Gruett - Manitowoc WI
Michael Wech - Two Rivers WI

Oil-Rite Corporation - Manitowoc WI

F04B 126

4172221

A single-piece piston and drive assembly for use in a motor-actuated pump to meter a predetermined amount of lubricant or other liquid. The drive assembly includes a rotatable drive shaft, an eccentric cam insert, a cam rod, and a rocking beam. The rocking beam is coupled to the piston, the cam rod shaft, and a biasing mechanism. When the drive shaft is rotated, movement of the cam rod shaft causes the rocking beam to pivot and move the piston along a stroke to dispense the liquid. The piston operates in association with a flow adjustment stem that regulates the amount of liquid metered by the pump, and a valve assembly for evacuating the liquid from the pump chamber into and through an outlet fitting. Also provided is a flow volume indicator for use in a pump for indicating the amount of liquid being discharged. The flow volume indicator has a main body with an annular side wall, flexible base wall, and a knobbed pointer that is inserted into a bore of the pump body and coupled to the flow adjustment stem.

52539849, Oct 19, 1993

Jul 21, 1992

7/918633

Donald G. Gruett - Manitowoc WI
Scott D. Wright - Manitowoc WI

Oil-Rite Corporation - Manitowoc WI

F04B 1700
F05B 128

417401

An apparatus for efficiently applying a subject liquid on an object of interest is disclosed. The apparatus includes a metering device (30), a discharge tube (280) and a nozzle (290). The metering device (30) includes a cylinder (115) and a piston (165) which is operatively disposed within the cylinder to define a metering chamber (177) ahead of the piston. The metering device (30) includes a liquid inlet (108) and a liquid outlet (109). Fluid flow to the liquid outlet (109) is controlled by a check valve (130). The piston (165) is driven forwardly through a working stroke to force the liquid in the metering chamber (177), out of the metering chamber, and past the check valve (130). The piston (165) breaks the plane of the open end of the cylinder on each working stroke to preclude entrapment of air in the metering chamber (177), and thus provide for a more accurate metering. The nozzle (290) includes a fluid passageway (301) which is disposed in fluid flowing relation relative to the metering device (30).

45295140, Jul 16, 1985

Dec 19, 1983

6/562859

Donald G. Gruett - Manitowoc WI

Oil-Rite Corporation - Manitowoc WI

B01D 2710
B01D 3502
B01D 3514

210234

A filter assembly includes a slidable tubular member which in a first position provides for flow communication from an inlet passage through a filter element to a filter chamber outlet. Upon removal of the filter housing and filter element the tubular member is biased to a second position to effect a flow shut off between the inlet passage and the tubular member. The filter assembly may further include an outlet passage in flow communication with the inlet passage, and a valve seat is axially aligned with the tubular member and disposed between the inlet passage and outlet passage. A valve member on the end of the tubular member is engageable with the valve seat to preclude flow between the inlet passage and outlet passage when the tubular member is in the first position and providing for flow communication between the inlet passage and the filter chamber outlet.

47845848, Nov 15, 1988

Jul 17, 1987

7/075040

Donald G. Gruett - Manitowoc WI

Oil-Rite Corporation - Manitowoc WI

F04B 3910

417399

The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by check valve means. The piston is driven forwardly through a working stroke to force the liquid medium in the metering chamber out of the chamber and past the check valve means. The piston breaks the plane of the open end of the cylinder on each working stroke to preclude entrapment of air in the metering chamber and thus provide for more accurate metering.

47845783, Nov 15, 1988

Feb 29, 1988

7/161798

Donald G. Gruett - Manitowoc WI

Oil-Rite Corporation - Manitowoc WI

F04B 3910

417225

The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by check valve means. The piston is driven forwardly through a working stroke to force the liquid medium in the metering chamber out of the chamber and past the check valve means. The piston breaks the plane of the open end of the cylinder on each working stroke to preclude entrapment of air in the metering chamber and thus provide for more accurate metering.