Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 5456183 | Integrated infrastructure transit system A transit system is provided for application within existing routes of travel infrastructures, travelling along the median strip and utilizing the air space over the median strip and above limited height roadway traffic and beneath overpasses and height l... | 10/10/1995 |
| 5104040 | Butt joint device Apparataus for butt joining hanging conveyor supports having a C-shaped rail section in which conveying hangers can travel back and forth along the rail section. The supports each have a hollow section above the rail section and trolley wires running alon... | 04/14/1992 |
| 4905605 | Conveyor trolley A conveyor trolley with a pair of wheels rolling on a flat upper face of an upper end rail portion of a guide rail, one wheel acting as a drive wheel and attached to an output shaft of a speed-reducing unit mounted on a trolley body movably supported on t... | 03/06/1990 |
| 4733615 | Carrier rail for overhead conveyors A carrier rail for overhead conveyors includes an upper and a lower flange connected together by a web. Angled profiles are disposed on at least one side of the web and are spaced apart interiorly of the flanges. The profiles and the web cooperatively def... | 03/29/1988 |
| 4671183 | Cart type conveying apparatus A cart type conveying apparatus comprising a guide rail having a substantially U-shaped section and including upper and lower horizontal extensions, and a conveyor cart including trolleys guided by the guide rail. The upper and lower extensions define gui... | 06/09/1987 |
| 4545303 | Monorail conveyor system A monorail conveyor system in which an automotive cart comprising a drive wheel, a drive motor for driving the drive wheel, a gear case where output of the driving motor is reduced, and centering rollers rotatable on vertical axes, receives electric curre... | 10/08/1985 |
| 4531460 | Material handling system A material handling system of the monorail and crane type is adaptable to carry relatively heavy loads and light loads through convenient structural modification using common component parts. The system is comprised of a double track 40 for heavy loads, f... | 07/30/1985 |
| 4524698 | Modular rail member for the translation of load-bearing carriages on an overhead track A modular rail member facilitates the translation of load-bearing carriages on an overhead track and comprises a vertical wall formed with two sections of different lengths which are spaced apart from and connected to each other by a flare having a vertic... | 06/25/1985 |
| 4520733 | Guide rail and follower wheel construction for monorail A guide rail and follower wheel construction for a monorail are disclosed. The monorail vehicle follower wheel has a radially directed, circumferential groove shaped to fit over a raised track portion, and the cross sectional shape of the wheel groove and... | 06/04/1985 |
| 4393785 | Suspended track for monorail suspended trolleys To permit attachment of a suspended track without drilling of holes lfor installation and connection to support elements (25), the track has an upper hollow structural section (2), for example in essentially semi-circular shape with depending vertical sec... | 07/19/1983 |
| 4185562 | Suspended driving railway car A vehicle suspended from a trackway of an aerial trackway system is provided. The vehicle comprises a front traction unit having a supporting wheel and a rear traction unit having a supporting wheel. These traction units support a vehicle body of the vehi... | 01/29/1980 |
| 4088079 | Combination rail, conveyor chain and return hanger A unitary hanger is provided for supporting from the lower web of a single, overhead I-beam support the trolley rail, the advancing reach, and one or more returning reaches of a drop finger conveyor.... | 05/09/1978 |
