Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7234605 | Logging grapple carriage A grappling carriage that is relatively lightweight and adapted to forcefully close first and second grapple legs with a log or a bundle of logs contained therein. The grappling carriage has a self-contained power supply that is remotely controlled by the operator. ... | 06/26/2007 |
| 7213714 | Slack pulling carriage for logging operations The present invention involves a carriage of the type commonly used in skyline logging operations. The invention facilitates moving logs along a suspended skyline by means of a hoisting system built into the carriage comprised of a radio controlled electronics syste... | 05/08/2007 |
| 6237502 | Sheave arrangement suitable for slack pulling carriage A sheave arrangement having a driving drum and a tension wheel. The driving drum includes a circumferential groove that has two side walls disposed at an angle, alpha. A line preferably is placed between the drum and tension wheel such that a substantiall... | 05/29/2001 |
| 6223660 | Timber hauling device A travelling device for hauling timber has a loading ramp (4) for the wood and a loading crane (5). Two cable drums (12, 13) with cables (18, 19) are attached to one frame (1), and one cable (19) can be attached in front of and the other cable (18) behind... | 05/01/2001 |
| 5203265 | Self-propelling, multi-route transport for movement along both horizontal and vertical sections of track A self-propelling transport having utility as an elevator system in a high rise building, the transport having a vehicle unit that rides on a track unit that includes a stationary drive chain that is engaged by a sprocket wheel assembly on the vehicle uni... | 04/20/1993 |
| 5121695 | Overhead cableway An overhead cableway is disclosed, in particular a chair lift, with a cable revolving between stations and with transport devices having a traveling gear and connected with the cable via removable clamps. Travel segments are provided at every station whic... | 06/16/1992 |
| 5020443 | Skyline-suspended carriage for heavy load pulling A skyline-suspended carriage system for transporting a heavy load slopewisely of a hill, comprising: (a) first and second vertically-offset and horizontally spaced mobile anchor points; (b) hoists, mounted to the first and second anchor points; (c) a sing... | 06/04/1991 |
| 4316602 | Device for pressing a cable against the bottom of a pulley groove The hoisting apparatus comprises a device for pressing a roller or a train of rollers against a cable section engaging a driving pulley in order to improve the adherence of the cable to the pulley groove which is caused by the load; this device comprises ... | 02/23/1982 |
| 4235475 | Mineral mining equipment A mineral mining machine hauls itself along a working face by engaging a round link chain. The links of the chain are fed sequentially from link-retaining pockets in a track component arranged around the working face, around a driven sprocket assembly on ... | 11/25/1980 |
| 4142323 | Track and motor with resiliently connected flywheel This amusement device includes a suspended flexible track attached to a support at one end, and a motor driven device slidingly mounted to the track in guided relation. A control system is provided which includes a pair of elongate clutch elements wrapped... | 03/06/1979 |
| 4098196 | Portable ski tow hoist A rope tow for use on a ski slope. Rollers are rotatably mounted one above the other on a fixed frame; the bearing surfaces are in frictional engagement. One of the bearing surfaces has a plurality of ridges. A knotted endless rope is passed through the e... | 07/04/1978 |
