Instrotek, Inc.

Johnny Gordon Williams, Jr

Ali Regimand

Lawrence H James

Peter Donald Muse

Andrew LaCroix

Adam C O'Neill

Dirk Steckmann

A system for conducting a maximum specific gravity test includes a sealable container for receiving and holding an asphalt mixture sample, a vacuum pump in fluid communication with the container for evacuating the container, a valve in fluid communication with the container, a shaker for shaking the container, and a controller. The controller can operate the system in a test mode by: (i) turning on the vacuum pump; (ii) automatically monitoring a vacuum pressure in the container with the vacuum pump on; (iii) automatically turning on the shaker when the monitored vacuum pressure reaches a target vacuum pressure value; (iv) automatically opening or closing the valve such that the monitored vacuum pressure in the container is maintained within a target vacuum pressure range for a predetermined period of time with the shaker on; and (v) automatically turning the shaker off at the end of the predetermined period of time.

Systems and methods for maximum specific gravity tests for asphalt mixture samples

A portable moisture trap for use with a vacuum pump includes: a housing; a cooling chamber positioned at least partially within the housing including a first inlet port and a second outlet port; a lid that sealably attaches to a top portion of the cooling chamber to seal the cooling chamber; a heat sink residing under the cooling chamber; a thermoelectric device having an upper cooling side and a lower heat generating side residing between the cooling chamber and the heat sink; a fan oriented to blow air upwardly toward the heat sink; and a baffle extending downwardly in the cooling chamber from a location proximate the lid to a location proximate an inner bottom surface of the cooling chamber, with the baffle configured to define a physical barrier to urge air received through the first port to flow down toward the inner bottom surface of the cooling chamber before exiting through the second port, to thereby remove moisture from air traveling through the cooling chamber in response to a vacuum pump in fluid communication with the second port.

Lightweight portable moisture traps for use with vacuum pumps

Growing community of inventors

Raleigh, NC, United States of America

Johnny Gordon Williams, Jr