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 |
| 7226393 | Exercise bicycle A unique structure for an indoor exercise bike that provides strength in its design, as well as the flexibility to create an aesthetically appealing frame structure. The monocoque frame design, including two symmetrical halves joined together, forms a very strong, l... | 06/05/2007 |
| 7175570 | Exercise bicycle frame An exercise bicycle including a frame, an adjustable seat structure, and an adjustable handlebar structure. One example of the frame includes a front fork, a down tube connected with the front fork, a seat tube, and a bottom frame member. The down tube has a first s... | 02/13/2007 |
| 6902485 | Dual slip clutch arrangement A self-propelled forage harvester has a relatively wide mowing implement attached to its forward end and including right and left hand rotary mowing and drawing in drums together with right and left hand rotary conveying drums. A drive transmission for driving these... | 06/07/2005 |
| 6874606 | Torque limiting clutch having centrifugally regulated characteristic torque A torque limiting clutch or coupler is provided for implementation between input and output shafts. A spring biased friction stack assembly establishes a characteristic breakaway torque of the unit. A torque modifying plate is fixed to a pressure plate and, in conju... | 04/05/2005 |
| 6699130 | Slip clutch A self-propelled forage harvester has a relatively wide mowing implement attached to its forward end and including right and left hand rotary mowing and drawing in drums together with right and left hand rotary conveying drums. A drive transmission for dr... | 03/02/2004 |
| 6497620 | Coupling assembly for agricultural implements A coupling assembly for agricultural implements has a friction coupling (1), an electromagnet (6) and control mechanism (7). The friction coupling (1) includes a friction assembly (4) which is loaded by a pressure plate (14). The pressure plate (14) is lo... | 12/24/2002 |
| 6470658 | Agricultural implement, in particular a mowing machine A self-propelled forage harvester has a relatively wide mowing implement attached to its forward end and including right and left hand rotary mowing and drawing in drums together with right and left hand rotary conveying drums. A drive transmission for dr... | 10/29/2002 |
| 6190258 | Torque limiter clutch A multiple disc torque limiting clutch has an output hub in interference fit upon an output shaft. After being so assembled, as by a heat shrink fit, the output hub and shaft can be received by the remainder of the torque limiting clutch, consisting of in... | 02/20/2001 |
| 6171193 | Torsional vibration damper A torsional vibration damper includes two structural units rotatable relative to one another and linked to each other by a spring arrangement which includes at least one thrust piston. At certain angles of rotation between both structural units, the flow ... | 01/09/2001 |
| 5924329 | Torque-limiting manipulation device A device for manipulating a workpiece in space includes a fixture, a stanchion assembly, a manipulation mechanism, an actuation mechanism, and a reaction mechanism. The fixture has an end onto which the workpiece affixes. The stanchion assembly has an upp... | 07/20/1999 |
| 5803811 | Torque overload clutch and clutch plate A dry plate torque overload clutch for a driveline has a clutch plate with knurled surfaces that are impressed into the facing surfaces of friction discs to strengthen and support the friction disc material so as to resist being squeezed out from between ... | 09/08/1998 |
| 5688176 | Multiple disk torque limiter for hollow shaft motors A torque limiting clutch for use with a hollow shafted motor has an input hub in operative connection with the hollow input shaft. A back plate is disposed at a fixed distance from the input hub. A plurality of interleaved friction disks and separator pla... | 11/18/1997 |
| 5501636 | Rotary machine system having hollow tube shaft and plural output shafts A rotating machinery system provides flexible clutch configuration. In accordance with a first embodiment, a tubular shaft is rotatable about a first axis and has a hollow core, the tubular shaft having a first end and a second end; a second shaft coaxial... | 03/26/1996 |
| 5295909 | Compact torque limiting clutch A compact torque limiting clutch provides spring cup bolt assemblies for interengaging a pressure plate and input flange on opposite sides of a friction flange of an output hub. The spring cup assemblies include bolts employed for securing the clutch elem... | 03/22/1994 |
| 5135088 | Compact torque limiting clutch A compact torque limiting clutch provides spring cup bolt assemblies for interengaging a pressure plate and input plate and input flange on opposite sides of a friction flange of an output hub. The spring cup assemblies include bolts employed for securing... | 08/04/1992 |
| 5129497 | Torque limiting clutch A hub member receives a tapered collect for gripping a drive shaft such as a shaft projecting from an electric motor. The hub member extends into a surrounding cylindrical housing which is secured to rotate with the hub member and carries a set of general... | 07/14/1992 |
| 5056302 | Mower-conditioner drive system A mower-conditioner drive system includes a main support casting having an outwardly projecting stub shaft and an inwardly projecting pivot pin mounted to an upright wall section at one end of a header frame. A slip clutch is received on the stub shaft an... | 10/15/1991 |
| 5020650 | Torque limiting clutch having set torque range over its useful life A torque limiter has an input flange connected to an output hub through a force generating subassembly which includes a pressure plate and a cover plate having a plurality of springs interposed therebetween. The cover plate is fixedly secured to the input... | 06/04/1991 |
| 5002517 | Friction disc torque limiter A torque limit for interconnecton with a pair of coaxial shafts includes a stack of friction and separator discs alternately splined to drive shaft and to a housing affixed to a driven shaft. In a first embodiment, an annular ring receives a plurality of ... | 03/26/1991 |
| 4947972 | Axially frangible automatic torque limiting clutch A mechanical automatic torque limiting clutch containing an axially frangible and easily replaceable component is disclosed. The clutch is capable of limiting torque output by adjusting the friction between spring loaded input and output plates, and furth... | 08/14/1990 |
| 4793120 | Clutch and cap disc assembly A cap disc clutch mechanism is provided in which a pair of cap disc clutch mechanisms will sense the torque between a cap and neck of a container and will allow cap tightening discs thereon to stop once the desired torque is reached and at the same time, ... | 12/27/1988 |
| 4661083 | Multiple disc torque limiting clutch A multiple disc torque limiting clutch is presented. A stack of friction discs are splined to an output hub with a stack of separator discs interposed therebetween and keyed to a housing. Spring cup assemblies are positioned through openings in the separa... | 04/28/1987 |
| 4645472 | Torque limiting clutch A torque limiting clutch having one or more friction surfaces placed under pressure by pre-compressed helical springs employed for eliminating adjustment and compensating for wear of the clutch during use. In one embodiment of the invention, the springs a... | 02/24/1987 |
| 4617003 | Adjustable friction clutch assembly A clutch assembly capable of providing several predetermined settings, wherein the components which support springs applying torque are not subjected to bending loads. The settings are achieved in that a supporting ring supporting a pressure plate against... | 10/14/1986 |
| 4585042 | Log debarker A log debarker having a frame, a stator supported by the frame, a rotor journaled in the stator for rotation about a longitudinal axis of the rotor, a rotating mechanism for rotating the rotor about the longitudinal axis, a plurality of debarking tools at... | 04/29/1986 |
| 4519209 | Hydraulic motor bypass apparatus Grinder-mixers include a material infeed device such as a feed table for feeding bales of hay to be ground up and incorporated into livestock feed rations. Due to varying bale density, the bale grinder sometimes lugs down when encountering a dense bale. H... | 05/28/1985 |
| 4508212 | Adjustable torque conveyor roller drive A friction clutch for a conveyor roller bearing apparatus wherein a plurality of small thrust springs are disposed between an adjustable nut and a thrust pad to force a drive sprocket against a back-up friction pad connected to the roller axle shaft. Mean... | 04/02/1985 |
| 4501570 | Adjustable friction clutch A friction clutch wherein the area pressures on the friction linings can be adjusted within a predetermined range while ensuring an even distribution thereof is provided with an adjustable supporting ring acting to vary the spring pressure within said clu... | 02/26/1985 |
| 4464137 | Clutch mechanism A torque limiting power transfer mechanism for use on an apparatus connectable to a power takeoff shaft, such as pull-type agricultural equipment is disclosed wherein the drive shaft connectable to the power takeoff shaft is rotatably connected to the clu... | 08/07/1984 |
| 4445876 | Adjustable friction overload clutch In an adjustable friction overload clutch for protecting the drive line between a power take-off shaft on a tractor and an agricultural implement, one or more Belleville spring washers bias plates and friction discs together. Adjustable bolts extend throu... | 05/01/1984 |
| 4401426 | Torque limiting clutch A torque limiting clutch having at least two friction surfaces placed under pressure by pre-compressed helical springs employed for eliminating adjustment and compensating for wear of said clutch during use.... | 08/30/1983 |
| 4373358 | Torque limiting mechanism A torque limiting mechanism provides for a spring loaded coupling of driver and driven friction discs for simultaneous and uniform rotation. A spring retainer system is incorporated which provides restraint against expansion of the spring beyond a predete... | 02/15/1983 |
| 4171147 | Flywheel for a construction machine A construction machine is provided with a flywheel having a torque limiter which permits the flywheel to slip when a rotationally driven cutting tool of the machine is halted. The torque limiter is spring loaded to eliminate the need for adjustment which ... | 10/16/1979 |
| 4075910 | Overload safety device for gas turbine engines An overload safety device in an output gear box of a high speed turbine engine protects the output gears and shaft system of the turbine against damage due to instantaneous high loads imposed on the turbine as, for example, high loads due to out-of-phase ... | 02/28/1978 |
| 4018298 | Wheel assembly with slip clutch Wheel and axle assembly for a small vehicle such as a riding lawnmower which includes a frame and an engine mounted upon the frame, the assembly comprising an axle having opposite first and second ends journalled mounted upon the frame for rotation and dr... | 04/19/1977 |
| 3984999 | Friction overload coupling An elastic friction overload coupling having two coupling halves and friction bodies arranged therebetween, wherein both coupling halves are pressed against one another with spring force for transmitting a rotational moment, and wherein at the one couplin... | 10/12/1976 |