Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 8052124 | Elevator brake with composite brake hub An elevator brake (20) rotor for use in an elevator machine (10) includes a non-metallic elevator brake hub (36) and a metal flange (34), both of which have an opening with a splined portion for guiding axial movement of the rotor along a... | 11/08/2011 |
| 7967278 | Winch assembly The present invention is directed to apparatus for a winch assembly. The winch assembly may be secured to a towing trailer and arranged to assist in loading and unloading cargo from the trailer. The winch assembly may include mechanisms, systems, and features to mak... | 06/28/2011 |
| 7374153 | Dual braking device for a power winch A dual braking device for a power winch includes a first braking device and a second braking device, which is composed of a transmitting sleeve, a braking lining, an electromagnetic induction coil, a magnetic conduction member, and an elastic member. When the power ... | 05/20/2008 |
| 7367548 | Method and apparatus for elevated storage of articles Method and apparatus for elevated storage of articles including application of a spring clutch winch to provide the required lifting and holding forces. In preferred embodiments, the apparatus includes a spring clutch winch, one or more elongate elements payed out f... | 05/06/2008 |
| 7159851 | Apparatus for deploying and retrieving water sampler An apparatus includes a bi-directional DC motor; a gear reducer connected to the DC motor; a pulley mounted on an output of the gear reducer; an anti-back drive brake mounted on the output of the gear reducer; a reel wound with cable; a second pulley attached to the... | 01/09/2007 |
| 7159852 | Manual marine winch internal gearing A manual swivel winch of the present invention includes internal drum gearing. The winch has a pair of spaced side plates, a rotating drum supported between the side plates, an internal drum gear coaxially mounted with the rotating drum, and a pinion drive gear enga... | 01/09/2007 |
| 7156374 | Chain block A chain block comprising a load sheave winding up a load chain, a hand wheel arranged on one side of the load sheave and rotatable in one of a normal direction and a reverse direction in response to the manual operation of a hand chain, a pinion shaft inserted throu... | 01/02/2007 |
| 6659429 | Self-locking reduction device A self-locking reduction device used in a winch has a support to which an input shaft is rotatably mounted. The input shaft has an eccentric shaft portion. Three pins are formed at regular intervals on a circumference around the center of the eccentric sh... | 12/09/2003 |
| 6604731 | Utility winch A utility winch having a single planet gear assembly that commonly engages adjacent ring gears, one ring gear fixed and the other rotatable. The planet gears of the planet assembly have inner and outer portions that rotate together and have different diam... | 08/12/2003 |
| 6241215 | Portable winch A winch including a casing for accommodating an electric motor, a gearbox and a roller for winding and unwinding a traction member. In order to provide a cost-effective flat winch which can be transported by a single person and used universally, in partic... | 06/05/2001 |
| 6209690 | Load brake A load brake having a load shaft, a flange-like pressure plate fixedly mounted onto the load shaft, and a cogwheel arranged on the load shaft. A tension device produces an axial motion and force in the cogwheel as the wheel rotates with respect to the loa... | 04/03/2001 |
| 6034271 | Betaine gemini surfactants made from amines Amphiphilic amphoteric compounds of formula (I) ##STR1## wherein R1, R2, R3, R4, R5, and n are as defined in the disclosure.... | 03/07/2000 |
| 5573091 | Electrically powered or manually driven clutch and brake assembly for electric winch Electrically powered or manually driven clutch and brake mechanism for an electric wince cooperate with a transmission mechanism. The clutch mechanism is provided with a thrust bearing on a clutch shaft and a large clutch gear is then inserted thereon. A ... | 11/12/1996 |
| 5398911 | Winch assembly A winch assembly (10) includes a first transmission assembly rotatably connecting a motor (11) to a winch drum (20) comprising clutches (12, 16) adapted to rotatably engage an output shaft (13) of the motor (11) to a winch drum shaft (19) of the winch dru... | 03/21/1995 |
| 5228661 | Spare tire carrier and winch A spare tire lift-and-carry apparatus for use on a vehicle includes a rotatable input shaft supported by a housing. A transmission mechanism is provided for transferring torque from the rotatable input shaft to a cable storage member driven in rotation ab... | 07/20/1993 |
| 5002259 | Power winch system A power winch is described which includes drive means with an output shaft, lock means to prevent reverse rotation of the shaft and a drum clutch assembly. The drum can be selectively engaged with or disengaged from the drum shaft. The lock means prevents... | 03/26/1991 |
| 4938454 | Chain hoist with automatic brake and double chain hooks A pair of axially aligned input and output shafts are jornalled from a frame supporting a brake drum about the output shaft and the output shaft mounts two pairs of diametrically opposite brake shoes therefrom spring biased into friction braking relation ... | 07/03/1990 |
| 4884783 | Hoist with oil cooled brake A compact, lightweight, electrically powered hoist with a drum used for hoisting or lowering a payload. A vertically oriented reversible motor is controlled by a control pendant with a momentary switch to drive a helical gear reduction and a worm gear red... | 12/05/1989 |
| 4854547 | Vehicle-mounted retrieval winch and control means therefor A compact retrieval winch and a control therefor are mounted on a recovery vehicle for pulling an immobilized heavy vehicle, such as a military tank, back onto suitable terrain. The winch comprises a support structure, a rotatable hollow cable drum with a... | 08/08/1989 |
| 4688660 | Winch for elevator A winch for an elevator which is provided with a drive pulley rotated through a reduction gear by a motor and a brake unit provided between the motor and the reduction gear, makes it possible to produce the brake unit with a compact frame, light weight an... | 08/25/1987 |
| 4611787 | Efficient lightweight hoist with multiple-cable-size traction and safety systems This scaffold hoist uses a transmission mechanism whose output shafts are fastened to the hoist housing, and whose case rotates, carrying a sheave which impels the mechanism along the cable. The transmission mechanism is advantageously a quadrant drive fo... | 09/16/1986 |
| 4555091 | Efficient lightweight hoist with multiple-cable-size traction and safety systems This scaffold hoist uses a transmission mechanism whose output shafts are fastened to the hoist housing, and whose case rotates, carrying a sheave which impels the mechanism along the cable. The transmission mechanism is advantageously a quadrant drive fo... | 11/26/1985 |
| 4444375 | Hunter's towing machine An adapter that converts any normal chainsaw into a winching type towing machine for use by hunters who fell large game such as elk or deer, and must haul their fallen prey over rugged and remote terrain. The adapter replaces a chainsaw chain and guide ba... | 04/24/1984 |
| 4441691 | Hoisting winch mounted on crane or the like A hoisting winch for cranes or the like having a power transmission system assembled in a final reduction drive of the winch and arranged such that arresting of the whole planetary gear set meshing with a ring gear connected to a spooling drum and releasi... | 04/10/1984 |
| 4408746 | Hydraulically actuated winch assembly A hydraulically actuated winch assembly having a dual planetary gear system for driving a common ring gear from a power input shaft. Power from the shaft is divided through the two planetary gear systems for driving the common ring gear which is attached ... | 10/11/1983 |
| 4398698 | Freefall winch system and method of operation One or more freefall systems for a crane or the like is disclosed, which system includes a protective circuit that includes three separate switches that must be closed before the winch can be placed in its freefall mode. A mode switch in the cab must firs... | 08/16/1983 |
| 4390161 | Winch drive and brake mechanism A winch drive and brake mechanism is disclosed featuring a load compensating brake. The brake includes a fixed member and first and second rotary brake members. The first and second brake members are coaxially mounted on a drive shaft in alignment with a ... | 06/28/1983 |
| 4251060 | Hand hoist A hand hoist comprises a brake support member (1) for supporting brake plates (24, 25) and firmly mounted on a driving shaft (20) detachably connected through gears to a load pulley (32). A brake biasing member (2) is threadedly engaged on the brake suppo... | 02/17/1981 |
| 4227680 | Hydraulic winch A rapid reverse winch has a hollow winding drum and a hydraulic motor to a first side of the drum. A drive shaft extends inwardly from the motor and is connected to a primary sun gear near the center of the drum. A primary internal gear extends about the ... | 10/14/1980 |
| 4215850 | Winch A winch includes a direct current reversible motor operable to drive a gear train to wind or unwind cable from a drum and also includes first and second clutch mechanisms in the gear train that provide respectively (1) internal loading of the winch to pro... | 08/05/1980 |
| 4158797 | Power hoist A power hoist is disclosed wherein a single operating lever is moved between haul, hold and lock positions. A load may be suspended when the hoist is in hold position by means of braking action which is primarily provided by closing a shunting switch acro... | 06/19/1979 |
| 4151981 | Brake drum controlled hoist A hoist is described which combines a block and tackle with a windlass. A drum brake and operating linkage therefor incorporated into the hoist is to automatically provide braking to prevent a load from causing unwanted reverse rotation of the windlass. L... | 05/01/1979 |
| 4136391 | Adaptive cargo landing system An adaptive cargo landing system for landing a load from a support on a first vessel or platform to a deck on a second vessel or platform, where the distance between the support and deck is a bandwidth limited random time function. A variable gain control... | 01/23/1979 |
| 4132387 | Winding mechanism Winding mechanism for example for cranes in which a winding drum is rotatable by two motors the first arranged to drive the drum so as to take up any slack rope when operating conditions, for example sea-state, reduce the load on the drum, the other motor... | 01/02/1979 |
| 4128228 | Extension ladder hoist A support having a hoist for raising and lowering articles from one elevation to another in which one portion of the support is a ladder.... | 12/05/1978 |
| 4118013 | Self-energizing winch brake and drive An input shaft is provided with circumferentially spaced ramps which confront opposed ramps on a coaxially aligned ramp shaft. The ramp shaft is provided with a sun gear which can rotate only through a one-way clutch and a plurality of brake discs. The su... | 10/03/1978 |
| 4103872 | Overload protection apparatus for hoisting machine The disclosure relates to an overload protection apparatus for hoisting machine such as rope hoists or chain blocks. The apparatus has a slipping gear unit and a ratchet gear unit which are arranged on a shaft in a reduction gear assembly. The ratchet gea... | 08/01/1978 |
| 4074891 | Winding mechanism-drive, particularly for construction cranes or like hoisting devices A winding mechanism-drive, particularly for construction cranes or the like hoisting devices, including a normal three-phase current-electromotor, a hydrostatic transmission with electronic-hydraulic servo-regulation for the continuous infinite variations... | 02/21/1978 |
| 4069921 | Overhead crane including a single failure proof hoist An overhead crane for use in handling critical loads and including a horizontally movable trolley on which is mounted a single failure proof hoist mechanism having alternative or redundant means for supporting the loads if structural failure occurs in the... | 01/24/1978 |
| 4046235 | Automatic load brake The disclosure is of an improvement of automatic load brakes, of the type generally and generically known as a Weston disk brake, as used, for example, in braking a hoisting drum adapted for reeling in and reeling out a cable suspending a load. The fricti... | 09/06/1977 |
