Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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 |
| 7207234 | Ball screw In a ball screw, a nut is fitted with the outer periphery of a screw shaft, ball rolling grooves opposed to each other are formed in the screw shaft and the nut The ball rolling grooves cooperate in forming a ball rolling path therebetween. A tube as a return path d... | 04/24/2007 |
| 5685390 | Electrically-operated power steering apparatus An electrically-operated power steering apparatus comprises a steering shaft, a rack shaft capable of linear movement for turning a steering running wheel a, rack-pinion gear for coupling the steering shaft with the rack shaft, and a ball screw mechanism ... | 11/11/1997 |
| 5547432 | Toroidal-type continuously variable transmission In order to prevent strong bending stress given to outer rings of thrust ball bearings of power roller assemblies and to improve the durability of the outer rings, a toroidal-type continuously variable transmission has thrust needle bearings which absorb ... | 08/20/1996 |
| 5123756 | Roller bearing and segmented roller retainer therefor A spherical roller thrust bearing comprises two bearing rings rotatably guided by spherical roller elements for rotation about an axis. The roller elements are spaced circumferentially apart by a segmented retainer comprising separate retainer segments sp... | 06/23/1992 |
| 4955246 | Continuously variable traction roller transmission Needle bearings are interposed between roller supporting members and collars of thrust bearings for traction rollers, respectively. Each thrust bearing is supported on a pivotal portion of a shaft which is in turn supported at its pivot base portion on ea... | 09/11/1990 |
| 4934843 | Rotary structure This invention relates to a rotary structure adapted to be used for a spindle unit of a miniature motor or miniature rotor or for a tape guide roller of a VTR or the like. In the structure of the rotary mechanism, instead of the conventional expensive rad... | 06/19/1990 |
| 4588313 | Four-point contact bearing A four-point contact bearing with the largest possible pressure angles and suitable for rotary and swinging movements is disclosed. The rim gaps on both sides of the balls are extremely narrow and offset radially with respect to each other. The cage is se... | 05/13/1986 |
| 4523793 | High-performance low-torque anti-friction bearing assembly A high-performance low-torque anti-friction bearing assembly having numerous applications including dynamic support of a stabilized platform under severe operating conditions. The assembly consists of two rings provided with two pairs of raceways having r... | 06/18/1985 |
| 4161344 | Method of and means for rotatably supporting a load A mounting for a load rotating or oscillating about a vertical axis comprises a stationary annular support member centered on that axis and provided with inner and outer peripheral guide tracks engaged by two rotatable annular carrier members, either the ... | 07/17/1979 |
| 4019786 | Shielded side thrust roller assembly for lift truck mast units A side thrust roller assembly particularly adapted for use in a lift truck mast unit to laterally position its carriage relative to an upright element while providing environmental protection for a thrust bearing within the assembly, the side thrust rolle... | 04/26/1977 |
