Quotables
"There is no reason anyone would want a computer in their home."
Ken Olsen, chairman and founder of Digital Equipment Corporation ; 1977
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4226562 | Toolholder A toolholder has a shank with a tapered body which is adapted to fit into a complementary socket in an end face of a machine tool spindle. A blind bore in the body is engageable by holding means for holding the shank in the socket. A first axial section o... | 10/07/1980 |
| 4199286 | Power drawbolt with planetary drive A Drawbolt is rotatably mounted within the spindle of a machine tool to secure a toolholder to a socket in the front end of the spindle. First and second spur gears are formed on the rear end of the spindle and drawbolt, respectively, and are positioned s... | 04/22/1980 |
| 4196501 | Machine tool Disclosed is a machine tool which comprises a spindle head, and an automatic tool changing apparatus which comprises a tool release mechanism adapted to be operated by movement of the spindle head in the direction of axis of the spindle and a tool magazin... | 04/08/1980 |
| 4175898 | Tool changing apparatus An apparatus for power assisted locking and unlocking of cutting, grinding, or like tools received within the tool holder of a machine such as a vertical milling machine or the like. The described machine includes a spindle and a quill, and the tool is re... | 11/27/1979 |
| 4172683 | Machine tool having drawbar mechanism There is disclosed a machine tool, of the type having a tool magazine for receiving tools therein, and wherein a spindle head is moved in the direction of the axis of a spindle relative to the tool magazine such that one of the tools in the tool magazine ... | 10/30/1979 |
| 4167218 | Machine tool arrangement A machine tool arrangement comprising a main electric motor including a rotor having a hollow cylindrical rotor shaft intergral therewith and extending therethrough. A hollow driving spindle is disposed coaxially with the rotor shaft and the spindle is in... | 09/11/1979 |
| 4158987 | Pressure foot for machine tool This invention provides a frictional clamping arrangement for holding the workpiece being cut by a router so as to prevent movement of the cutout portion of the workpiece in the last increment of the cut. The device includes a pressure foot having a clamp... | 06/26/1979 |
| 4148246 | High speed spindle and draw bar assembly A machine tool high speed spindle assembly and draw bar assembly, wherein the spindle assembly includes a hollow, rotary spindle shaft, and the draw bar assembly is nonrotational relative to the spindle shaft. The draw bar assembly is axially movable with... | 04/10/1979 |
| 4135848 | Toolholder clamp for machine tools A pair of gripper jaws are pivotally mounted on a machine tool spindle within a central bore that opens into the toolholder socket on the outer end of the spindle. The gripper jaws have serrated outer ends that extend into the toolholder socket in positio... | 01/23/1979 |
| 4131054 | High speed spindle and draw bar assembly A machine tool high speed spindle assembly and draw bar assembly, wherein the spindle assembly includes a hollow, rotary spindle shaft, and the draw bar assembly is nonrotational relative to the spindle shaft. The draw bar assembly is axially movable with... | 12/26/1978 |
| 4122755 | Self-locking chuck A tool holding assembly wherein a self-locking chuck or tool holder is releasably secured in a rotary spindle by a draw bar and collet type tool holder gripping means. The self-locking chuck is provided with a spring-biased, ball locking means that functi... | 10/31/1978 |
| 4075927 | Tool orienting and release mechanism for machine tool A machine tool having a tool-supporting hollow spindle has the tool mounted in fixed relation to a draw bar which slides axially within the spindle between a tool retaining position and a tool release position. A barrel cam within the spindle is adapted t... | 02/28/1978 |
| 4068559 | Tool fastening device The invention deals with a quick-change-device for a conical, hollow bore spindle of a machine tool in particular a milling machine, for the quick releasing and clamping of tools or tool holders that have conical shanks and which have a ring groove on the... | 01/17/1978 |
| 4063488 | Tool chuck An improved tool chuck having a draw-in rod axially movably located inside a tool spindle and attached to a locking head which is positively engageable with a tang on a tool. Locking members are provided and are each movably contained in radial openings i... | 12/20/1977 |
| 4026191 | Machine tool A machine tool having a head with a rotatable spindle including an extensible bar for holding a tool and which is axially movable between fully retracted and fully extended positions with several intermediate additional machining positions established by ... | 05/31/1977 |
| 4011791 | Tool chucking device A chucking device comprising an axially displaceable draw-in bar mounted inside a hollow tool spindle and carrying a coupling head which is adapted to positively engage the tool shank. The tool in such a device is chucked by inserting it into the socket i... | 03/15/1977 |
| 4008647 | Machine tools There is disclosed a spindle unit for machine tools in which the spindle is rotated by a change speed mechanism comprising a drive sleeve splined and slidable axially in the spindle and a gear shift sleeve slidable with the drive sleeve and having a bull ... | 02/22/1977 |
| 4008646 | Machine tools There is disclosed a spindle unit for machine tools in which there is a spring operated drawbar in the spindle having finger hooks for engaging the adapter of a toolholder for drawing the latter into a tapered socket at the nose of the spindle with means ... | 02/22/1977 |
| 3975984 | Self aligning collect for machine tools The invention is concerned with an improvement in a machine tool gripping assembly of the type which comprises a housing with a bore therewithin and a collet slidable toward and retractable from a spindle facing end portion of said bore, the collet having... | 08/24/1976 |
| 3955471 | Machine tool spindle A machine tool includes a head which supports a vertically movable quill within which there is disposed a rotatable spindle to which various kinds of cutting tools may be attached. Within the quill there is provided a spring-biased annular piston for oper... | 05/11/1976 |
