Tannas Company

Savant Gmbh

Robert H Seer

Theodore W Selby

Gregory C Miiller

Kevin J Wolfe

James R Cotter

Michael A Tubbs

Stephanie J Resio

Patrick T O'Dell

John J Van Meter

Low heat-transmissible spindle for rotary viscometry includes an elongate, radially balanced, straight shaft made of a suitably stiff material having a low heat-transmission value, with a head monolithic with the shaft which can contact and interface with a test fluid to yield drag from the contact and interface when the spindle is rotated in the fluid; and a spindle coupling nut attached to the shaft opposite the head. For example, the shaft may be made of a woven glass fabric cylinder laminated with a synthetic resin, and the head made of stainless steel. A rotary viscometer can be equipped with the spindle, and fluid viscosity can be determined by employing the same in a rotary viscometric protocol, for example, ASTM D 2983.

Rotary viscometry with a low heat-transmissible spindle

Device can include an array of stators placed in a carousel which can hold the stators in the array apart from one another while precisely cooled by a suitable source. For example, the device can be provided with cooling in conjunction with an instrument having a highly circulated, cold liquid bath for temperature control such as by insertion of the stators in the carousel through housing of a versatile sensitive rotating viscometer instrument into its bath. The sample carousel has a lower base containing a plurality of stator accommodating orifices in a first array, and an upper base connected to the lower base. The upper base can have a plurality of rotor control pin accommodating orifices in a second array, and the upper base is mounted to the lower base such that the second array of orifices in the upper base is disposed in registry with the first array of orifices in the lower base. A rotor control pin serving several functions can be mounted in one of the rotor control pin accommodating orifices, which can be moved into controlling contact with a rotor inserted in a stator, and a stator can be mounted in one of the stator accommodating orifices. The first array is such that, when a plurality of stators are mounted in the stator accommodating orifices, one for each of the orifices in the first array, and the carousel is positioned in a temperature control bath having a temperature control fluid, the fluid can be circulated between any two of the mounted stators among the stators mounted in the complete array. The stator can be of a plurality of pieces, for ease of operation and cleaning, with a rotor guiding needle on a bottom cap, and the rotor can have a concave part on its bottom, for accepting the needle and a lateral rotor control part on its top. Low temperature testing of oils can be carried out with high accuracy, precision and responsiveness.

Device to test pumpability of oils at low temperature

Pivoting leveling stand has a base with an outer, horizontal boundary; a pivot, downward of and in contact with the base, and positioned inwardly of the outer horizontal boundary of the base; and at least three leveling machines in contact with the base placed outwardly of the pivot. The pivot is capable of contacting an underlying support surface, and the leveling machines are attachable to an underlying support. As an option, from the base, preferably above the pivot, a fixture, for example, an upright rod such as for attaching a sensitive rotating viscometer, may be attached to the stand.

Pivoting leveling stand

A wall in a lower portion of a hollow support member having an open upper end and upper interior surface and a lower interior cylindrical surface to encircle and retain the stator of a rotating viscometer such as a Brookfield viscometer is provided with external threads and is slotted. A corresponding nut threads thereon and applies pressure to hold the stator of the viscometer.

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Midland, MI, United States of America

Robert H Seer