Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7428917 | Portable power planer with height scale A power planer having a base, a carriage assembly and a height scale. The carriage assembly includes a cutterhead that may be adjustably positioned relative to a datum that is defined by the base. The height scale has a rotary scale that rotates in response to movem... | 09/30/2008 |
| 7231724 | Nozzle seal slot measuring tool and method A tool for measuring seal slot position includes a tool shaft having a longitudinal axis, a pin eccentrically disposed at one end of the tool shaft relative to the longitudinal axis, and a disk member disposed at an opposite end of the tool shaft that facilitates ro... | 06/19/2007 |
| 7124793 | Portable planer for a single use stand An apparatus for a portable planer 12 having rails 14 with means for mounting to a single use stand 16, 18. The planer 12 has a pair of rails 14 with bolts 48 depending from the base thereof having threads with nuts 50 | 10/24/2006 |
| 7064462 | Power tools with switched reluctance motor A method of assembling a power tool, a power tool, a method of assembling an electrical device, and an electrical device includes a switched reluctance motor. The electrical device is preferably a hand-held power tool, however, any type of electrical device that inc... | 06/20/2006 |
| 7028728 | Wood planing machine with coupling units A wood planing machine includes a cutter carriage mounted movably on screw rods, upper and lower couplers mounted adjustably on the cutter carriage and threadedly engaging the screw rods, and upper and lower screws for securing the upper and lower couplers to the cu... | 04/18/2006 |
| 7013938 | Shiftable rolling feed device for a wood planing machine A drive shiftable rolling feed device includes front and rear feed rollers mounted on a support carriage of a wood planing machine for feeding a workpiece, a reduction gear train disposed to convert a primary drive of a cutter shaft into two reduction drives and cou... | 03/21/2006 |
| 6971422 | Locking device for a plane machine A locking device for a plane machine includes a handle, an actuating rod, two side bases, an urging block respectively provided at two sides of each side base. The actuating rod is urged by a spring to bias a bit to one side of a machine base of a plane machine when... | 12/06/2005 |
| 6951231 | Planer apparatus A planer having a base, a first support member attached to the base and supporting a cutterhead for selective travel in a first direction toward the base and a second opposite direction, a top frame attached to the first support member and a depth stop mechanism att... | 10/04/2005 |
| 6945291 | Device for eliminating a gap of the threaded rod of a plane machine A device for eliminating a gap of the threaded rod of a plane machine has four gap nuts respectively screwed with four threaded rods under the threaded rod bases of a planing table. Four springs are respectively fitted between the backlash nuts and the threaded rod ... | 09/20/2005 |
| 6918419 | Portable power planer A portable power planer for planing the top surface of a workpiece. The portable power planer includes a carriage assembly and a carriage elevation mechanism for translating the carriage assembly. The carriage elevation mechanism includes a plurality of threaded gui... | 07/19/2005 |
| 6886615 | Portable power planer A portable power planer for planing the top surface of a workpiece. The portable power planer includes a base, which defines a reference surface, a cutting blade, which defines a cutting plane, and a setting mechanism may be employed to prevent a distance between th... | 05/03/2005 |
| 6810825 | Wood planing machine with a shield member for a motor unit and a cutter member A wood planing machine includes a support carriage mounted movably on a mounting frame, a motor unit and a cutter member mounted on the support carriage, and a shield member mounted on the support carriage and pivotable between covering and uncovering positions. Whe... | 11/02/2004 |
| 6807991 | Wood planing machine with a foldable workpiece-supporting table A wood planing machine includes a base, a plurality of mounting posts extending uprightly from the base, and a cutter carriage mounted slidably on the mounting posts. A workpiece-supporting table is pivoted to a front side of the base, and is movable between a posit... | 10/26/2004 |
| 6708744 | Portable power planer A portable power planer for planing the top surface of a workpiece. The portable power planer includes a carriage assembly and a carriage elevation mechanism for translating the carriage assembly. The carriage elevation mechanism includes a plurality of threaded gui... | 03/23/2004 |
| 6666242 | Wood planing machine with a height display unit A wood planing machine includes a base, screw rods mounted rotatably on and extending from the base, a cutter carriage mounted movably on the screw rods, and a detecting unit including a light transmitter and a light receiver that cooperates with the ligh... | 12/23/2003 |
| 6666241 | Wood planing device for a wood planing machine A wood planing device includes a support carriage movably mounted on a wood planing machine, and a rotatable shaft rotatably mounted on the carriage and having a coupling segment. A coupling sleeve surrounds the shaft and is movable between engaging and d... | 12/23/2003 |
| 6655427 | Wood planing machine with an error reducing unit for a workpiece thickness to be removed A wood planing machine includes a carriage having four corners mounted on a base via four hollow posts. Four screw rods are disposed rotatably in the posts. Four tubular threaded members are secured to the corners of the carriage, and are disposed within ... | 12/02/2003 |
| 6644368 | Wood planing machine with an adjusting unit for adjusting a horizontal position of a cutter carriage A wood planing machine includes left and right ends mounted on a base via left and right pairs of posts. The ends are respectively formed with through holes to permit extension of left and right screw rods. Left and right thread members are respectively i... | 11/11/2003 |
| 6585017 | Thickness planer with locking mechanism A thickness planer is described having a carriage locking mechanism to minimize vibration and movement of the carriage during the planing operation. Also described is a depth of cut indicator to display the thickness of the material to be removed during t... | 07/01/2003 |
| 6557599 | Wood planing machine with shiftable reduction drives of a feed-in rolling mechanism A wood planing machine includes a first drive transmission member transmitting a rotating force of a cutting member to a first transmission shaft with two gears mounted thereon. Two gears are splined on a second transmission shaft and are movable along an... | 05/06/2003 |
| 6546975 | Wood planing machine with a carriage height adjusting unit A wood planing machine includes a base, posts extending upright from the base, a cutter carriage mounted slidably on the posts, a pair of screw rods associated with the cutter carriage, a motor with an output shaft, and a carriage height adjusting unit th... | 04/15/2003 |
| 6533642 | Electronic control system by planer/sander An electronic control system for a planing or sanding machine is disclosed. The system uses twin linear measuring devices and twin motor-driven drive-systems, integrated by a computer or other electronic device, to independently monitor and control the po... | 03/18/2003 |
| 6516684 | Locking mechanism for a shaper A locking mechanism includes a seat having four comers each having a tube foamed thereon. Four guide posts of a base of a shaper extend through one of the tubes of the four corners, respectively. Each guide post is clamped by a respective tube when in a l... | 02/11/2003 |
| 6510879 | Device of depth index of a planing machine A device of depth index of a planing machine includes a bottom base, an upper base, an index device and a sensor device. The upper base is fitted with an index device at a preset position in the front. A push rod is pushed up to activate the index device ... | 01/28/2003 |
| 6427734 | Wood planing machine with a tightening unit A wood planing machine includes a base, four hollow posts extending upright from the base and formed with slots, four screw rods disposed in the posts, four sprockets connected respectively to the screw rods, a chain engaging the sprockets, a cutter carri... | 08/06/2002 |
| 6415829 | Wood planing machine that permits motor-driven height adjustment of a cutter carriage In a wood planing machine having rotatable screw rods and a cutter carriage with threaded members that engage the screw rods, a gear mounting seat is slidable along a drive shaft that is parallel to and that is rotatable with the screw rods. Upper and low... | 07/09/2002 |
| 6394155 | Locking device for a wooden planing machine A locking device for a wooden planing machine is fixed on an upper surface of a machinery base combined movably with four posts located at four corners of a base of a wooden planing machine, including two brackets each located at two sides of the upper su... | 05/28/2002 |
| 6315015 | Wood planing machine provided with a cutter locking device A wood planing machine includes a machine base having first and second mounting sides. First and second pairs of posts are fixed on the machine base at the first and second mounting sides, respectively. A cutter carriage is disposed above the machine base... | 11/13/2001 |
| 6315014 | Wood planing machine with tool accommodating function A wood planing machine with a tool accommodating function includes a machine frame having an upper portion, and a tool box having a lower box body mounted securely on the upper portion of the machine frame. The lower box body confines a tool accommodating... | 11/13/2001 |
| 6308754 | Thickness-indicating device for a wood-planing machine A thickness-indicating device for a wood-planing machine includes a mounting member, a pointer, a vertical pushing rod, a resilient member, and a scale member. The mounting member is adapted to be disposed fixedly on the cutter seat. The pointer has a con... | 10/30/2001 |
| 6308755 | Wood planing machine A wood planing machine includes a base, a cutter carriage, a rotary cutter adapted to shave a workpiece, a height adjusting unit, and a shaving thickness indicator including a seat having a bottom opening, a supporting member mounted on the seat and havin... | 10/30/2001 |
| 6298887 | Wood planing machine with an automatic chain tensioner device A wood planing machine includes a machine base having left and right mounting short sides, and feed-in and take-out long sides. Left and right pairs of posts are fixed on a top surface of the machine base at the left and right mounting short sides, respec... | 10/09/2001 |
| 6289950 | Wood planing machine A wood planing machine includes a base, two pairs of supporting rods respectively extending upright from the base, a cutter carriage including a pair of parallel carriage seats mounted movably and respectively on the pairs of the supporting rods, an emery... | 09/18/2001 |
| 6289951 | Wood planing machine A wood planing machine includes a base with posts, a cutter carriage, and a locking unit including clamp members pivoted on the cutter carriage and turnable toward the posts, linkage members that respectively extend between two adjacent ones of the clamp ... | 09/18/2001 |
| 6283180 | Wood planing machine A wood planing machine includes a base having posts and a seat mounted on the posts, a cutter carriage mounted on the posts, a rotary cutter mounted on the cutter carriage, a height adjusting unit for adjusting the height of the cutter carriage, and a hei... | 09/04/2001 |
| 6283179 | Wood planing machine with a carriage locking mechanism A planing machine includes a carriage locking mechanism disposed above a cutter carriage, which in turn, is connected movably to upstanding posts of a machine base that is disposed below the cutter carriage. The locking mechanism includes a pair of post b... | 09/04/2001 |
| 6283181 | Wood planing machine A wood planing machine includes a base having posts, a pair of seats mounted on the posts, and a hollow supporting rod interconnecting the seats and formed with a slot. The wood planing machine further includes a cutter carriage mounted on the posts, a ro... | 09/04/2001 |
| 6279628 | Wood planing machine with improvement relating to a thickness adjustment device A wood planing machine includes left and right pairs of posts fixed uprightly at left and right mounting sides of a machine base. A cutter carriage is disposed above the machine base, and has opposite end portions mounted respectively, vertically and mova... | 08/28/2001 |
| 6269853 | Wood planing machine with a carriage locking mechanism which is controlled by a rotary lever A planing machine includes a carriage locking mechanism disposed above a cutter carriage, which in turn, is connected movably to left and right pairs of vertical posts. The carriage locking mechanism includes an elongated mounting plate disposed fixedly o... | 08/07/2001 |
| 6131628 | Wood planing machine with material removal indicator assembly A planing machine includes a machine base with two mounting sides and feed-in and take-out sides, and two pairs of upstanding posts that extend upwardly from the mounting sides. A cutter carriage is disposed above the machine base, and is movable along th... | 10/17/2000 |