Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 4658800 | Grinding wheel profile dressing device A device for dressing a grinding wheel with an outer profile with the radius R1 comprises a dressing roller having a circular dressing profile with the radius R2. In order to admit dressing of grinding wheels with different profile r... | 04/21/1987 |
| 4521966 | Method and apparatus for determining the position of the center of a circular object The invention relates to a method and apparatus for determining the position of the center of a circular object. The object has a known diameter and is placed on a preferably flat surface. A sensor for indicating presence of an object proximate it is move... | 06/11/1985 |
| 4420910 | Control device for a grinding machine A device for controlling the feeding of a grinding wheel (2, 16) relative to a truing device (8, 19) for the grinding wheel at truing operations in a grinding machine incorporating a measuring apparatus (9, 9a) for indicating the finished size of the grou... | 12/20/1983 |
| 4232913 | Restrictor for a bearing pocket in a hydrostatic bearing A fluid restrictor for a bearing pocket in a hydrostatic bearing. The bearing comprises a first member having a bearing pocket and a second member confronting and facing the bearing pocket and a channel in the first member for supplying a pressure medium.... | 11/11/1980 |
| 4167083 | Grinding machine adapted for changing of grinding wheels on a grinding spindle Grinding machine adapted for changing of grinding wheels on a grinding spindle bolt of the kind in which the grinding wheel is fixed to the grinding spindle by introducing the spindle bolt in a bushing provided in a centrally located bore in the grinding ... | 09/11/1979 |
| 4144677 | Overrunning protection for a grinding wheel Overrunning protection for a grinding machine comprising a grinding wheel mounted in a head stock. The head stock is supported on a frame for movement in a direction toward and away from a work rest for a work piece at one end of the frame and a drive for... | 03/20/1979 |
| 4136572 | Device for incremental feed in a machine tool A device for incremental feed of the tool or workpiece in a machine tool of the kind in which feed is effected with a device having at least one rotating shaft, characterized by a rotating element fixed to the rotating shaft, a releasable coupling element... | 01/30/1979 |
| 4091571 | Casing for the grinding position in a centerless grinding machine A casing for a grinding machine characterized by a pair of hood sections which are actuatable from an open position enabling access to the grinding area and a closed position confining the grinding area in a manner to minimize dispersion of lubricant and ... | 05/30/1978 |
