In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7211015 | Belt installation tool A belt installation tool having a first member (18) engagable with a pulley hub whereby a belt installation radial load is transmitted to the pulley hub. A body (10) having a tool engagement portion (15) disposed radially from the pulley hub. A ... | 05/01/2007 |
| 7192006 | Belt inspection tool A tool for inspecting serpentine belts of vehicles includes a main body, an upper tang, a right tang, a left tang, a holder and a handle. The tangs define a window therebetween. The window is adapted to receive a belt to be inspected. The handle may be a flashlight ... | 03/20/2007 |
| 7107647 | Apparatus of driving agitator of upright vacuum cleaner The present invention relates to an apparatus of driving an agitator of an upright vacuum cleaner. It includes a fixing panel and a rotation guide which are positioned at an outer side of the driving shaft roller and guided to move coaxially with the driving shaft r... | 09/19/2006 |
| 7056244 | Belt installation tool A belt installation tool for installing a belt without rotating the pulley or the tool about a pulley axis of rotation. The tool comprises a ramp that engages a pulley flange. The ramp comprises a connecting member for connecting the ramp to the flange. After the ra... | 06/06/2006 |
| 6334827 | Pulley belt installer for a belt-type stepless transmission A pulley belt installer has a pulley holder (6) for holding one pulley (2) of a pair of pulleys, a held pulley width expander (5) for expanding the groove width of the pulley held by the pulley holder, a pulley belt holder (8) for holding a pulley belt in... | 01/01/2002 |
| 6224506 | Forage box clutch mechanism The present invention is a control apparatus for an implement transmission. The transmission is operably coupled to a plurality of driven mechanisms for providing a driving power from a prime mover to the plurality of driven mechanisms. A shift assembly h... | 05/01/2001 |
| 6086496 | Adjusting device A belt tension adjusting device provided on a scanner transmission belt to adjust the tension of the transmission belt, includes a helical spring that helps maintain the tension of the transmission belt, a retaining post for fixing the position of the hel... | 07/11/2000 |
| 5916053 | Dual mode operation continuously variable transmission having creeper low and reverse gears An automatic transmission for an automotive vehicle includes a continually variable drive mechanism having one sheave assembly fixed to an intermediate shaft and the input sheave assembly supported on an input shaft, gearset driveably connected to the inp... | 06/29/1999 |
| 5758735 | High performance bicycle propulsion For use in determination of chain transmitted power, the combination comprising a tensioned chain having a succession of chain links with undulating edges; an idler supported to be driven in rotation by the chain, and having an undulating perimeter surfac... | 06/02/1998 |
| 5688200 | Linear bicycle derailleur A derailleur for a bicycle for changing the speed of the bicycle. The derailleur can be distinguished from prior parallelogram designs in employing stationary guide rods over which a pulley wheel assembly is caused to slide as the bicycle's drive chain is... | 11/18/1997 |
| 5653654 | Belt installation and removal tool A belt installation and removal tool is provided for installing and removing a belt on a pulley and includes a handle assembly which includes a hand-grip portion, an extension portion connected to the hand-grip portion, and a finger-containing portion con... | 08/05/1997 |
| 4929219 | Belt locator for locating a belt on a pulley A belt driven system (1) employs a dynamoelectric machine (11) to rotate a pulley (7) on which is positioned a drive belt (13). An improvement is a belt locator (19) for locating the belt on the pulley. The locator is effective to properly locate the belt... | 05/29/1990 |
| 4681557 | Holder for bicycle chains A holder for bicycle chains consisting of two primary and necessary elements, see drawing 1, the outwardly curved channel shaped chain retainer element 1, and the elongated box shaped dropout receiver element 2, these two elements are integrated to form a... | 07/21/1987 |
| 4582504 | Trailing mower, belt, clutch and brake assembly A clutching mechanism for a suspended belt driven mower assembly that automatically removes the mower drive belt from the pulley system when the mower assembly is raised. A brake contacts the endless drive belt when the mower is in the raised position to ... | 04/15/1986 |
| 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 |
| 4508523 | Drive means for the shaft of a mobile apparatus The stationary drive station comprises a gear chain guided over three sprocket wheels. One sprocket wheel is driven by a drive motor. A tensioning wheel is rotatably journaled at a pivotably mounted lever acted upon by a tension spring. The tensioning whe... | 04/02/1985 |
| 4338642 | Drive belt release mechanism for magnetic disk drives A drive belt release mechanism for magnetic disk drives for disengaging a drive belt from and engaging a drive belt onto a spindle drive pulley. To disengage the belt, the mechanism lifts the belt from the drive pulley and simultaneously permits the drive... | 07/06/1982 |
| 4036070 | Slack belt clutch A clutch of the slipping belt type wherein the belt is lifted away from engagement with the driving pulley so as to avoid localized wear on the belt which would otherwise take place.... | 07/19/1977 |