Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7410435 | Hydraulic pipe mechanism for industrial vehicle A hydraulic pipe mechanism for an industrial vehicle includes a pulley shaft, a plurality of hydraulic hoses and a pulley set. The pulley set is provided on the pulley shaft and has at least first and second hose pulleys that are rotatably supported on the pulley sh... | 08/12/2008 |
| 7131980 | Surgical suturing instrument and method of use A device is disclosed for passing a flexible elongated element through a portion of a subject. In an embodiment, the device includes structure for retaining said flexible elongated element; and advancement structure for longitudinally advancing the flexible elongate... | 11/07/2006 |
| 6929575 | Pulley A pulley comprises a disk and an insert. The insert is fitted into the center of the disk integrally. Linear expansion coefficient of the disk is larger than the same of the insert. A concavity is formed on a periphery surface of the insert so that both side surface... | 08/16/2005 |
| 6371448 | Rope drive element for driving synthetic fiber ropes A traction sheave for driving synthetic fiber ropes, preferably of an elevator installation, ensures a consistently good selected tractive capacity that is largely independent of external influences which reduce friction. At least part of the rope running... | 04/16/2002 |
| 6112732 | Compound archery bow A compound bow carries eccentrics, each of which has a non-circular string groove with a geometric center removed from the axis of the eccentric and a take-up groove which is out of registration with the string groove about substantially the entire periph... | 09/05/2000 |
| 4955133 | Method of making pulleys with plural V-shaped grooves A method of making a pulley with a number of V-shaped grooves, especially having a stepped shape, comprises a rim or rims and a core which are separately formed by an appropriate plastic process and are fixed or connected fixedly to each other by a metall... | 09/11/1990 |
| 4919011 | Roller speed reduction drive A planetary speed reducer includes a drive roller having a drive surface, a stator having a concentric drive surface, the respective drive surfaces defining an annular space therebetween. A plurality of rotatable planet rollers have peripheral portion in ... | 04/24/1990 |
| 4571227 | Belt drive unit for transmitting drive between the drive shaft on an internal combustion engine and associated accessories A belt drive unit for transmitting drive between the drive shaft on an engine and associated accessories is described, the said unit essentially comprising a pin, designed to fit on to one end of the said shaft, and a pair of pulleys having different diam... | 02/18/1986 |
| 4545192 | Yarn false twisting apparatus A yarn false twisting apparatus is disclosed which comprises a pair of rotating circular discs having cooperating friction surfaces for engaging a running yarn at a twisting zone. The drive system for the discs includes a drive component which includes a ... | 10/08/1985 |
| 4411639 | Multi-purpose wheel particularly useful for games and demonstrations A wheel comprising a tread, at least a rim provided on an outer side thereof with one half of an axially assemblable claw coupling, a wheel hub including a wheel bushing fixed axially with respect to and fixed for rotation with the rim and including an ax... | 10/25/1983 |
| 4259810 | Transit vehicle door control apparatus There is disclosed a door motion control apparatus for the passenger entry and exit doors of a mass transit vehicle, which passenger entry and exit doors are opened by a drive motor when the vehicle is stopped at a desired location for passenger entry and... | 04/07/1981 |
| 4114473 | Guard for belt pulley A guard is provided for installation within an endless belt extending around a pair of pulleys for preventing danger associated with the nip between the belt and pulleys without interferring with freedom of access to the belt.... | 09/19/1978 |
| 4094051 | Method of making sheaves A series of adjoining concentric rings are cut from a metal plate. The same number of hubs, all the same shape, are also cut from plate material as are annular web plates to fit around hubs, but the outer diameters of the web plates are different from one... | 06/13/1978 |
| 4084397 | Arbor assembly for rotary mowers An arbor assembly for use with rotary mowers, and the combination of such arbor assembly with a mower blade subassembly and with a pulley subassembly. The arbor assembly comprises a shaft having reduced diameter end portions defining upper and lower shoul... | 04/18/1978 |
| 4037486 | Pulley An inexpensive pulley assembly is disclosed which accommodates a number of driving belts. The pulley includes a hub and a number of sheet metal members. These sheet metal members includes bases for attachment to the hub, inner flanges, sleeves flaring axi... | 07/26/1977 |
| 4002081 | Pulley construction A pulley is disclosed which comprises a hub, a firmly resilient collar affixed to the hub, and first and second annular sheet metal members surrounding the collar. The first annular sheet metal member has an outwardly flared margin and bushing portion whi... | 01/11/1977 |
| 3994181 | Noise-dampened pulley construction A noise-dampened V-grooved sheet metal pulley having one or more adjacent annular V-grooves formed in a wall of a cup-shaped blank. The pulley has tensioned dampening means engaged against or laminated with at least one V-groove wall of the pulley. The da... | 11/30/1976 |
| 3962926 | Stamped sheet metal pulley A sheet metal pulley having a pair of stamped sheet metal cups with telescopically interfitted side wall portions and integral flanges forming in cooperation with the flanges of rings received on the cups a plurality of V-shaped grooves. The rings are fix... | 06/15/1976 |
| 3945102 | Method and apparatus for making a sheet metal pulley A method and apparatus for making a sheet metal pulley having a pair of stamped sheet metal cups with telescopically interfitted side wall portions and integral flanges forming in cooperation with the flanges of rings received on the cups a plurality of V... | 03/23/1976 |
| 3935627 | Method of making sheet metal pulley A method for forming the grooves in single and multigroove sheet metal pulleys, including shaping and/or crimping of the groove walls, wherein the grooves are formed by a sequential, single step, continuous process from a punched or drawn blank without in... | 02/03/1976 |
