Caterpillar Tractor Co.

John P Jero

William D Brandon

Roger O Bjerk

Frederick S Engelking

Michael A Loda

John C Abraham

Gary L Grebner

William L Slusarek

Frederick S Engleking

An apparatus for controllably delivering power from a device to a workpiece is useful, for example, in performing qualitative material tests on various materials. In the instant apparatus, a sonic generator means controllably supplies sonic power to a workpiece, causing the surface of the workpiece to erode. A sensing means produces an actual power signal having a magnitude responsive to the power consumed by the sonic generator means. A settable means produces a desired power signal, and a control means compares the desired and actual power signals and supplies motor control signals in response to the respective magnitudes of the power signals and to a tracking time interval signal. In response to termination of the tracking time signal, the control means blocks the motor control signals. A motor means controllably moves the sonic generator means relative to the workpiece in response to receiving the motor control signals. Owing to the controllability of the apparatus, consistent, objective material test results are obtained from analysis of the power consumed by the sonic generator means with respect to time.

Apparatus and method for controlling a sonic device

High modulus asperities are incorporated into a fluoroelastomer matrix to provide a material which, when cured, exhibits high, stable coefficients of friction over a wide temperature range.

Fluoroelastomer-based composite material

High modulus asperities are incorporated into a fluoroelastomer-polyacrylate elastomer matrix to provide a material which, when cured, exhibits high, stable coefficients of friction over a wide temperature range.

Fluoroelastomer-polyacrylate based friction material

A friction coupling which utilizes a friction plate composed of high modulus asperities incorporated into a reboundably compressible elastomeric matrix for selective rotational engagement with a relatively noncompressible reaction plate between which is directed a flow of fluid with the asperities hydrodynamically wedging such fluid into a relatively thin load supporting film between the asperities and the reaction plate which film absorbs substantially all of the energy of engagement in the shearing effect of the fluid during relative rotation of the plates.

Friction coupling

Fluoroelastomers, particularly ultra high temperature thermally stable fluoroelastomers are bonded to a metal substrate by forming a roughened bonding surface on one side of the substrate, controllably oxidizing the substrate at a temperature sufficient to cause the formation of an oxide coat on said bonding surface but below the tempering temperature of the substrate, adjusting the substrate to a temperature above the softening temperature of the fluoroelastomer, adhering the fluoroelastomer which includes a minor amount of an alkaline earth oxide dispersed therein, heated to a temperature sufficient to initiate curing thereof, directly onto said bonding surface, and expeditiously compressing said fluoroelastomer between said bonding surface and a mold face maintained at a temperature closely adjacent to the temperature of the substrate.

Growing community of inventors

Washington, IL, United States of America

John P Jero