"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 7036211 | Percussive power tool pulling device A pulling tool comprises an air-powered internal anvil and hammer. The pulling tool is attached to the object to be removed. The hammer is urged by pressurized air to repeatedly strike the anvil, which applies a percussive force to the object, progressively removing... | 05/02/2006 |
| 6623876 | Sintered mechanical part with abrasionproof surface and method for producing same The invention concerns a mechanical part with abrasionproof surface characterized in that it comprises a sintered metallic body obtained from metallic powders and a laser-deposited cermet coating. The coating has a certain thickness whereof a portion is m... | 09/23/2003 |
| 5797437 | Log peeler A log peeler comprises a log peeling knife assembly 10 attached to a pulling cable 12, the pulling cable 12 being reeved around a powered cable drum 14. The pulling cable is attached at each end of the knife assembly so that the knife assembly will be pul... | 08/25/1998 |
| 5419380 | Tree stump grinder The invention provides a machine for grinding tree stumps to a level below the surface of soil in which the stump is located. The machine comprises a sled structure including lugs for releasably coupling the sled with pivot pins to a moveable boom of a ba... | 05/30/1995 |
| 5184656 | Method of cutting frond stubs from a date palm A method of cutting frond stubs of a date palm tree to produce a palm bark surface free of pockets where water can collect and which reduces the possibility of pathogen intrusion and proliferation is described using a cutting tool with a sharp straight ed... | 02/09/1993 |
| 5115845 | Portable stump remover A portable, self-contained stump remover, that may be hand held by the operator, has an engine driven cutting device with chisel elements which rotate through a circular path. The chisel elements may be laterally offset, and the stump remover may also hav... | 05/26/1992 |
| 5092380 | Method of cutting fronds or frond stubs from a date palm tree A method of cutting fronds and frond stubs of a date palm tree is described using a sharp, curved cutting tool with a rounded cutting edge which enables an attractive tree bark surface to be created.... | 03/03/1992 |
| 5034407 | Portable stump remover A portable tree stump remover, sufficiently light weight to be hand held by an operator, has an engine-driven cutting device with grinding teeth that rotate through a circular path. The cutting device is mounted to a base element that regulates the penetr... | 07/23/1991 |
| 4452288 | Powered tree chipper or bark hack An improved power bark hack including a motor of any suitable type which drives one end of an elongated connecting rod mounted in a co-extensive housing which also serves as the tool handle. The cutter is mounted at the free end of the connecting rod whic... | 06/05/1984 |
| 4441534 | Apparatus for cutting and/or grinding of tree stumps Apparatus for cutting and/or grinding tree stumps including an elongated member having a cutting disc mounted for rotation at one end and a chain bar fixed to one side of the elongated member to support a chain saw drive motor so that the cutting disc may... | 04/10/1984 |
| 4304275 | Log debarker A hand held apparatus comprising an engine drivingly connected through a chain and sprocket to a rotatable drum. The drum has a spiral groove formed therein which mounts a chain saw-type chain. The drum is mounted on a frame together with a cradle which s... | 12/08/1981 |
| 4029134 | Device for removing circumferentially bark from plants The applicant's device for hand operation is characterized by two jaws, one the upper and the other the lower, which form an angle at their inner ends of a degree that permits the introduction of stems or branches of plants at their other end, the upper j... | 06/14/1977 |