VRS Semi-Active Suspension System Semi-Active Air Suspension Seating We make the world s best seats.
Semi-Active Suspension System Greatly reduced vibration transfer by 40%. Vibration Reduction System & Semi-Active Suspension System Sears Manufacturing Company has been designing and producing seating products for the human form since 1855. The company is committed to customer satisfaction through innovation, and as the leader in suspension seating, it is constantly working with new technologies to improve ride performance and comfort. Sears Semi-Active suspension system (VRS2000) is the product to our commitment to innovation. It provides improved vibration reduction through a system that incorporates the Lord Motion master semi-active damper. The damper is controlled by a microprocessor. Air Reservoir Semi-Active Damper Controller and Position Sensor 1) Electronic signals transmitted by position Controller with Integral Postion Sensor Power in from Vehicle Lord Motion Master Semi-Active Damper Utilizing Magnetorheological Fluid Technology Ride Firmness Selector sensors and/or accelerometers allow the controller to monitor ride based on vehicle inputs and make appropriate damping adjustments. 2) MR fluid within the Lord Motion damper changes viscosity when exposed to magnetic field (created by controller) and can vary the strength of magnetic field to compensate automatically from soft to stiff depending on ride inputs. These advanced products not only make for a more comfortable operation, but also enhance the health of the operators and the productivity of the equipment. In a healthy environment, the operator is able to work longer hours and can operate at a higher speed where appropriate. RESULTS: comfort, performance and more productivity. reduced vibration
The technology behind the VRS2000 Semi-Active suspension seat earned Sears one of the top 50 new innovative products by SAE AE50 award. Sears Semi-Active suspension system provides improved vibration reduction. 5080 559 391 255 156 381 126 149 163 300 491 increased productivity less fat
VRS Semi-Active Seat Features Semi-Active Air Suspensions Semi-Active Air 2000 Suspension w/178mm travel Weight adjust - 45-140kg Fore/aft isolator Lateral isolator Swivel +/- 25 degrees Semi-active shock system Air expansion tank Integrated puck slides 152mm travel Front mounted controls Molded suspension cover 5000 Series seat top Contoured comfort cushions Recliner Mechanical lumbar support 8000 Series seat top Contoured comfort cushions high back rest Recliner Mechanical lumbar support Deluxe feature package 5000, 8000 Height adjustable upper back rest Height & articulating upper back Seat cushion tilt/extension Options Tilt-up & adjustable armrests Seat belts 5080 D5080 8080 D8080 Standard = Optional = igue faster equipment operation
2 Overplot of Frequency Response Data Statistics 1.8 1.6 1.4 (A, CUSHION, Z/A, TABLE, Z) 2/1. Grp1 C:/CLOSED/2007/B1.FRF (A, DISK, Z/A, TABLE, Z) 3/1. Grp1 C:/CLOSED/1492/P6.FRF (A, DISK, Z/A, TABLE, Z) 2/1. Grp1 C:/CLOSED/2104/B7.FRF (A, CUSHION, Z/A, TABLE, Z) 2/1. Grp1 C:/CLOSED/1968/B5.FRF Mechanical Suspension 1.2 Passive Air Suspension FRF, Magn 1 0.8 Semi-Active Air Suspension 0.6 0.4 Active Air Suspension 0.2 0 0.5 1 1.5 2 2.5 3 Frequency (Hz) {Be=0.1648} Comfortable operators are more productive. The Semi-Active seat reduces vibration transfer by 40%. That means less fatigue and the ability to operate equipment approximately 15% faster. Think how that could improve your bottom line. WRMS Acceleration (9m/s2) 1.400 1.200 1.000 0.800 0.600 0.400 0.200 ISO5007-AG3 RIDE COMPARISON 0 INPUT MAX OUTPUT MECHANICAL PASSIVE AIR SEMI-ACTIVE ACTIVE-AIR SUSP SUSP AIR SUSP SUSP
Sears History 1947 Began producing agricultural and industrial seats. 1976 Expanded internationally with Sears Europe in UK. 1855 Established in Davenport, Iowa. Produced harnesses, saddles and leather goods for the agricultural industry. 1965 Introduced first mechanical suspension for the agricultural market. 1981 Expanded into heavy-duty truck seating market. 1994 Expanded facilities in Davenport with new mechanical center to house six-axis ride simulator and new test equipment. 2005 Additional 50,000 square feet at main plant in Davenport. Innovation made Sears a world leader. The year was 1855, some six years before the American Civil War. Isaac Howe Sears began manufacturing quality leather and canvas goods for agricultural markets in Davenport, Iowa. Serving our customers worldwide. The company grew through five family generations. Along the way, it established an enviable reputation for innovation. In 1967, for example, it introduced the first mechanical suspension for tractor seats. Sears has remained the leader in suspension seating ever since. The company diversified into state-of-the-art truck seating in 1981. Today, Sears is a global company and world leader in seats for the agriculture, construction, industrial and heavyduty truck markets. Through technological advances, it has become synonymous with quality, durability, reliability and comfort. Breakthroughs in durability and comfort. Innovations include seamless, waterproof cushions made through the Fabriform flame-bonding process. Fabriform material will not tear, even if punctured by a sharp object, and is impervious to dust, dirt and water resulting in longer cushion life. Unsurpassed driver comfort has been obtained through extensive ergonomic analysis involving the pressure mapping of nearly 200 drivers and testing on a sixaxis ride simulator. This research is instrumental in determining the correct cushion contours, seat dimensions, and control locations to fit the application. Sears innovation also includes a VRS (Vibration Reduction System) air suspension. This semi-active system is 45% better at reducing vibration than passive air suspension seats. It works through fluid that electromagnetically changes viscosity to dampen vibrations as they are encountered. As Sears commitment to innovation continues, the company holds over 60 patents and proudly maintains its international ISO9001 registration. IS0-9001:2000 P.O. Box 3667 Davenport, IA 52808 Phone: 800 553 3013 Fax: 563 383 2819 www.searsseating.com 2006 Sears Manufacturing Company 500-106