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| Number | Title | Issue Date |
| 7419448 | Drive belt pulley and belt drive system A hollow cylindrical pulley body 5 is carried rotatably by a hollow cylindrical shaft member 11. A support rod 8 is inserted in the shaft member 11 to support the shaft member 11 for rocking motion about a pivot axis C2 orth... | 09/02/2008 |
| 7360911 | Oscillating belt and pulley drive system for high performance light emitting diode warning light assembly A plurality of support casings for light emitting diode warning lights are driven in synchronous arc movements by a belt and pulley drive system having a compact construction with four belt segments. ... | 04/22/2008 |
| 7357741 | Belt looping A high output light source, such as a stage lighting luminaire, produces light along a path. The belt which drives a driven device is kept away from that path by passing it around the opposite side of the pulley. ... | 04/15/2008 |
| 6699149 | Idler pulley with a multiple position locating mechanism An idler pulley is provided with a plurality of attachment locations, or holes, extending through a hub portion of the pulley to allow the pulley to be attached to a stationary object in a plurality of alternative configurations in order to provide a way ... | 03/02/2004 |
| 6592480 | Belt looping A high output light source, such as a stage lighting luminaire, produces light along a path. The belt which drives a driven device is kept away from that path by passing it around the opposite side of the pulley.... | 07/15/2003 |
| 6592481 | Synchronous drive arrangement for a printer A synchronous drive arrangement for a printer of the present invention includes a timing belt passed over drive pulleys each being mounted on a particular print drum. The timing belt is made up of two narrow belt parts produced by dividing a single belt. ... | 07/15/2003 |
| 6312352 | Synchronous belt drive tensioning assembly A tensioning assembly is provided for a synchronous belt drive on a mower deck. A plurality of idlers are mounted for rotation on bracket. One end of the a bracket engages an abutment surface mounted on the deck which restricts its movement, whereas a sec... | 11/06/2001 |
| 5725450 | Device for preventing derailment of a bicycle chain A device for preventing derailment of a bicycle chain of a bicycle. Upper and lower guide members are positioned strategic to a drive sprocket of the bicycle to guide and maintain the chain in engagement with the drive sprocket regardless of the tension o... | 03/10/1998 |
| 5316523 | Sprocket control apparatus A device, such as a printer or plotter for driving media, has sprocket wheels with sprockets engaging sprocket holes at the edges of the media. The sprocket wheels are driven via a drive belt. In order to adjust the relative angular position of one of the... | 05/31/1994 |
| 5021032 | Tensioning device for flexible driving belts A tensioning device is provided for a flexible belt wound around the pulleys of a drive mechanism. The tensioning device includes an elastic biasing element and a damping mechanism. The biasing element applies a force on the belt in a predetermined direct... | 06/04/1991 |
| 4842570 | Device for the automatic shifting of a tensioning roller For maintaining a desired level of belt tension upon a change in the spacing of belt rollers on which the belt is trained, which results from heating of the housing that supports at least one of the rollers of the belt, the tensioning roller for the belt ... | 06/27/1989 |
| 4761155 | Tensioner for wrapping connector transmission device for internal combustion engine A tensioner acting on and allowing an endless transmission belt, stretched between a driving wheel and driven wheels supported on the body of an internal combustion engine, to run under a constant tension, wherein an oscillating lever supports a tension p... | 08/02/1988 |
| 4693666 | SCARA type manipulator apparatus A SCARA type robotic manipulator apparatus including a base supporting first and second independently operable drive motors, toothed belts engaging toothed gears for rotating primary and secondary arms in response to the first and second drive motors resp... | 09/15/1987 |
| 4674996 | Tensioner device for wrapping connector driving device in internal combustion engine A tensioner device for applying a predetermined tension force to a transmission belt extended between a driving wheel and a driven wheel supported on the body of an internal combustion engine, including a hydraulic automatic adjuster which comprises a plu... | 06/23/1987 |
| 4559775 | Friction 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. A pressure applying member is positioned to apply a biasing force to the re... | 12/24/1985 |
| 4557710 | Clutch controlled drive unit A drive unit preferably employed with a self-propelled lawn mower for driving at least one pair of wheels of the mower. An axle pulley is fixed on the axle of the drive wheels and a directional pulley is rotatably mounted above and in a spaced apart relat... | 12/10/1985 |
| 4457086 | Snowblower having improved auger and traction drive control A snowblower is disclosed having an engine, a friction disc rotatably driven by the engine, the friction disc including a friction surface and being rotatable about a first axis, a driven disc rotatable about an axis transverse to said first axis, the dri... | 07/03/1984 |
| 4392840 | Belt tensioner A device which maintains a predetermined tensioning force on the endless drive belt for vehicle accessories by use of a one-way clutch which prevents return of the tensioning means from its forwardmost tensioning position. In the preferred embodiment, a c... | 07/12/1983 |
| 4336760 | Earth working apparatus including aerators and material dispensers An earthworking implement comprising a frame on which are supported front wheels, rear wheels and a rearmost dolly wheel. An aerator member with blades is rotatably secured to the frame between the front and rear wheels. The dolly wheel is mounted on the ... | 06/29/1982 |
| 4324552 | Belt drive system with clutch A belt drive system comprising a drive sheave, a driven sheave, a belt providing driving engagement between said sheaves and a clutch for engaging and disengaging said driving engagement. The clutch is engaged and disengaged by moving an idler pulley asse... | 04/13/1982 |
| 4312267 | Idler apparatus Idlers used in the main drive chain on rectangular balers resist the accumulation of slack in the chain. Sudden stops of the drive apparatus cause the chain to be highly tensioned resulting in possible damage to the idler and the chain. An idler apparatus... | 01/26/1982 |
| 4300293 | Belt tensioning assembly for a clothes dryer A belt tensioning assembling for use in a clothes dryer positions a drive belt in tensioned relation about a rotatable drum and a drive pulley mounted within the dryer housing. The belt tensioning assembly includes an idler pulley and a resilient mounting... | 11/17/1981 |
| 4283181 | Hydraulic belt tensioner construction A hydraulic tensioning device for maintaining a predetermined amount of tensioning force on an endless drive belt for the vehicle accessories drive system. A hydraulic cylinder is adapted to be mounted in a fixed position with respect to the vehicle engin... | 08/11/1981 |
| 4075901 | Variable speed friction transmission A transmission including a cylindrical drive pulley, a cylindrical driven pulley, an endless belt of a suitable material and a predetermined uniform thickness, the belt being frictionally confined between the drive and driven pulleys and loosely encompass... | 02/28/1978 |
