Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7131175 | Extraction tool for extracting spiral threaded inserts and use of the extraction tool An extraction tool (20) for extracting spiral threaded inserts includes an elongated basic body (23, . . . , 26), on the one end of which an extracting tip (28) narrowing toward the front and intended for being inserted with a cutting action int... | 11/07/2006 |
| 7104168 | Slide stop device of a hexagonal spanner A slide stop device of a hexagonal spanner serves for preventing a rounded edged inner hexagonal screw to slide as the hexagonal spanner drives the inner hexagonal screw. The slide stop device comprises a spanner body; one end of the spanner body having a driving po... | 09/12/2006 |
| 7059222 | Slide stop device of a hexagonal spanner A slide stop device of a hexagonal spanner serves for preventing a rounded edged inner hexagonal screw to slide as the hexagonal spanner drives the inner hexagonal screw. The slide stop device comprises a spanner body; one end of the spanner body having a driving po... | 06/13/2006 |
| 6939213 | Quick change adaptor for rotary machines In one embodiment, the present invention includes an apparatus including an adaptor body having a first end to be coupled to a rotary device and a second end having a tapered portion, and a tool adaptor dimensioned to fit within the tapered portion, the tool adaptor... | 09/06/2005 |
| 6905278 | Connection point A connection point (1) between two tool parts is proposed which are joined by means of a threaded spindle (7) oriented in longitudinal direction of the tool parts. The threaded spindle has two oppositely threaded sections (13, 15) which interact... | 06/14/2005 |
| 4880245 | Chuck for concrete slab dowels A chuck for use in screwing one threaded member into another threaded member has a housing with a polygonal socket on one end for receiving a polygonal drive head of a wrench. The housing has a conical bore converging from the face toward the socket. A pl... | 11/14/1989 |
| 4864727 | Pneumatic tool holder A pneumatic tool holder includes: a handle having a piston pneumatically driven within a cylinder in the handle, a sliding sleeve secured to the handle having a longitudinal polygonal hole formed in the sleeve and a tool clamping member generally formed a... | 09/12/1989 |
| 4834596 | Quick change spindle adaptor for tool holder A quick change spindle adaptor for a power driven spindle having an axial bore and a tool holder having a shank axially projected into the spindle. A sleeve is secured upon the spindle and an outer shell is rotatably mounted upon the sleeve and retained t... | 05/30/1989 |
| 4809922 | Clamping head for winding cores The clamping head features a cylindrical section engaging the winding core with a threading which digs in inside the core and a subsequent collar forming a stop for the end face of the core. To obtain a form fit which spares the core, the threading is fas... | 03/07/1989 |
| 4795175 | Nipple chuck A nipple chuck for holding a pipe nipple blank in a power driven threading machine is comprised of three arcuate sleeve segments engaged between the jaws of the threading machine chuck. The segments are internally threaded at the front ends thereof and ar... | 01/03/1989 |
| 4745831 | Setting tool for screwing-in threaded rods A setting tool for screwing a threaded rod into a receiving material includes a work driver formed by a sleeve-like member. A retainer part is secured within one end of the sleeve-like member for holding the threaded rod while it is inserted. The end of t... | 05/24/1988 |
| 4741229 | Stud installer A stud insertion and mounting device with a threaded bore formed axially through a tubular body. The bore has an open end and a closed end in which an abutting and locking means is positioned at the closed end to abut the stud for rotatably threading said... | 05/03/1988 |
| 4684138 | Chuck for use in driving lag rods with a drill having a reversible motor A chuck attachable to a drill powered by a reversible motor, is adapted for use in driving lag rods into wooden supports and has an axial bore extending therethrough which is partly threaded from one end to receive the machine-threaded end of a lag rod. A... | 08/04/1987 |
| 4629374 | Boring tool with cutting edge adjustment for withdrawal clearance A boring tool has a radially adjustable tool bit holder mounted on a head part connectable to an adaptor. A threaded stud for the connection between the head part and the adaptor has a thread arranged in each half, the two threads having different pitches... | 12/16/1986 |
| 4099283 | Device for centering and maintaining short spool pieces A method of threading short spool pieces prepared from lined pipe and a novel device for maintaining the short spool centered in a conventional pipe threading machine is disclosed. The device enables a person skilled in the craft to cut and thread short p... | 07/11/1978 |
| 4084829 | Force-transmitting arrangement for hammer drills A force-transmitting arrangement for use in hammer drills and the like includes an internal thread in a chuck of a power tool and an external thread on a portion of the tool element which is to be mounted in the chuck, both threads being of compatible, ba... | 04/18/1978 |
| 4028762 | Method of threading short spool pieces A method of threading short spool pieces prepared from lined pipe and a novel device for maintaining the short spool centered in a conventional pipe threading machine is disclosed. The device enables a person skilled in the craft to cut and thread short p... | 06/14/1977 |
| 3999869 | Combination hole saw arbor An arbor is provided for use with different size power tool chuck jaws and has a main body section of enlarged cross section relative to a shank of the arbor. The shank and main body section have a plurality of grooves therein with each groove longitudina... | 12/28/1976 |
| 3984192 | Drill mount A rotary spindle of a drill mount has a free end provided with a thread whose angle of rise is so selected that its tangent is at least equal to the coefficient of static friction of steel on steel.... | 10/05/1976 |
