Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7891641 | Manual disengaging and self-engaging clutch A clutch mechanism (75) for use with a machine to disengage the machine until normal operation thereof is commenced. The clutch mechanism (75) includes a clutch engaging member (130) movable into engagement with a notch (77) of the ring g... | 02/22/2011 |
| 7793919 | Hand winch Hand winch comprising a wind roll for receiving a flexible elongated member, an operation shaft engaged with the wind roll for transmitting forces therebetween, a friction brake including a gear member being in engagement with the wind roll and having a thrust posit... | 09/14/2010 |
| 7780146 | Retrieval assembly A retrieval assembly is configured and arranged for use with a retractable lifeline assembly including a cable assembly. The retrieval assembly is releasably engagable with the cable assembly to pay out or retract the cable during rescue. ... | 08/24/2010 |
| 7588233 | Winch assembly including clutch mechanism A winch assembly includes a housing member, a drum rotatably coupled to the housing member, a drive shaft extending through the drum and into the housing member, a gear train located within the housing member and driven by the shaft, a coupling member axially fixed ... | 09/15/2009 |
| 7513485 | Automatic winder An automatic winder has a base, motor, a transmission device and a reel. The motor is mounted on the base. The transmission device connects to the motor and has a pair of high-speed gears and a pair of low-speed gears. The reel is mounted on the transmission device ... | 04/07/2009 |
| 7377485 | Replacement motorized drive unit for boat lifts A three-phase drive motor is utilized to operate a boat lift. In one example, a drive motor arrangement for replacing manual drives on an existing boat lift winch shaft comprises a worm gear box with a worm driven by an integrally mounted motor on the worm gear box.... | 05/27/2008 |
| 7350771 | Gear for electrically/hydraulically and manually driven sheet winches By modern gears for electric/hydraulic and manually driven sheet winches, demands are made on the presence of a free-wheeling mechanism (24) in case that the drive unit fails, and it is also desirable that the gear takes up as little space as possible, irresp... | 04/01/2008 |
| 7344121 | End surface gear-type overload protection device for manually operated hoists An end surface gear-type overload protection device for manually operated hoists that utilizes a disc-shaped spring to control tension such that when the gears are in a leftward rotation and engagement, operation continues normally. However, during rightward rotatio... | 03/18/2008 |
| 7303183 | Safety brake mechanism for a winding drum and method for grinding a safety brake The invention concerns a safety brake mechanism for the winding drum (8) of a hoisting machine that can be driven via a motor (4) with lifting gearbox (3), which is substantially braked to a standstill without jerking when the lowering speed is ... | 12/04/2007 |
| 7284745 | Portable raising and lowering device and equipment therefor A raising and lowering device, particularly suitable for incapacitated human or animal patients. The device includes a load carrying support having at least one elongated arm including a proximal end section and distal end section. The arm is pivotable on the device... | 10/23/2007 |
| 7273207 | Bi-directional winch A winch includes a first cable reel and a second cable reel. A driveshaft rotates the first cable reel and the second cable reel. The driveshaft is moveable along an axis of rotation between a first position and a second position. The driveshaft operationally engage... | 09/25/2007 |
| 7140598 | Freefall windlass with governor A freefall-type windlass includes appropriate gearing for moving the windlass spool in a retrieve direction to wrap anchor cable thereabout or to permit the anchor to drop by gravity thereby unwrapping the anchor cable from the spool. A governor gear is incorporated... | 11/28/2006 |
| 7000904 | Cable winch structure A cable winch structure for vehicles is disclosed. The cable winch includes a rolling cylinder connected to a speed-reducing device at one lateral side, and having a motor connected to one end of the roller cylinder so that the speed reducing motor transmits the pow... | 02/21/2006 |
| 6966545 | Chain block A chain block with a drive motor (2) with a motor shaft (11), which is connected at the take-off side via a slip clutch (50) to a transmission input shaft (14), having a first gear (18a) and mounted in a housing (1) b... | 11/22/2005 |
| 6916267 | Method and apparatus for selective engagement and disengagement of a ring gear of a gear set Apparatus for the selective engagement and disengagement of a ring gear of a gear set in which an actuator can be displaced between a first position engaging the ring gear and a second position disengaged from the ring gear selectively by a manually operable mechani... | 07/12/2005 |
| 6767004 | Replacement motorized drive unit for boat lifts A drive motor arrangement for replacing manual drives on an existing boat lift winch shaft comprises a worm gear box with a worm driven by an integrally mounted motor on the worm gear box. A worm gear is mounted on a tubular cross shaft extending outwardly on opposi... | 07/27/2004 |
| 6527253 | Lifting device The invention relates to a lifting device with a housing having a drive wheel, a friction disk brake, a load wheel and a gear arranged sequentially in an axial direction inside the housing. The drive shaft extends through the friction disk brake and the l... | 03/04/2003 |
| 6517054 | Lever hoist with overload preventing device A lever hoist with an overload preventing device comprises a pressing member for rotatably pressing a pressed member via a reverse rotation preventing ring and a pair of friction members, and a rotation drive member capable of transmitting rotating force ... | 02/11/2003 |
| 6352243 | Chain hoist with overload prevent device The object is to provide a chain hoist with an overload prevent device, ensuring an easy and secure adjustment of load limit numerical values. It comprises a pressing drive member 8 for pressing and rotating a pressure receive member 7 by way of a backsto... | 03/05/2002 |
| 6224039 | Chain block A chain block which can ensure free rotation of a hand wheel when the hand wheel is rotated in a hoisting direction in the state in which an overload protection mechanism is in operation and also can ensure the lowering of a load when the hand wheel is ro... | 05/01/2001 |
| 6007054 | Hand operated chain block having an improved cover To provide a hand operated chain block capable of facilitating the fitting of the brake cover to the related side plate without worsening the appearance of the chain block, a brake cover is provided, at a marginal portion therearound, with a flange portio... | 12/28/1999 |
| 5921529 | High line pull winch assembly A hydraulic winch which is capable of generating significant amounts of torque and providing very high line pull even after a significant amount of cable is wrapped onto its spool. The winch spool is also capable of carrying a large amount of thick cable.... | 07/13/1999 |
| 5421553 | Lever-type winch idler device An idler device is for use in a lever-type winch having a brake including a hub fixed to a pinion shaft, an actuating member mounted on a threaded portion of the pinion shaft, and a ratchet wheel and two brake plates interposed between the hub and the act... | 06/06/1995 |
| 5374035 | Winch with power train, manual operation option, and particular brake assembly A winch includes a reversible electrical motor with output shaft which drives a drum through a drive mechanism with multiple sprockets and gears to take up and let out a cable. The output shaft is connected through a one-way bearing to a brake hub. The br... | 12/20/1994 |
| 5217084 | Load limiting apparatus for a hoist A fall arresting device is provided having fall arresting apparatus which permits application of a force to rotate a shaft in a clockwise direction and permits controlled rotation of the shaft in a counter-clockwise direction but prevents uncontrolled rot... | 06/08/1993 |
| 5156377 | Lever-operated hoist A lever-operated hoist having a structure for continuously lowering the lower hook side chain and end side chain of load chains in no-load state comprising a pressure drive member movably screwed in the axial direction on a drive shaft, a rotation limitin... | 10/20/1992 |
| 5150768 | Load limiting apparatus for a hoist Apparatus for limiting the amount of force applied to a cable of a hoist by applying a force on clutch plates which are operatively joined to rotatable plates so that there is relative rotation between the clutch plates and the rotatable place when a forc... | 09/29/1992 |
| 5123630 | Portable winch An improved portable winch is described including a reversing drive mechanism. The drive mechanism includes a drive bearing which is movable between two positions. In one position the bearing is able to transmit the rotational motion of the input shaft di... | 06/23/1992 |
| 5090507 | Load limiting apparatus for a hoist Apparatus for limiting the amount of force applied to a cable of a hoist by applying a force on clutch plates which are operatively joined to rotatable plates so that there is relative rotation between the clutch plates and the rotatable place when a forc... | 02/25/1992 |
| 4834341 | Hoisting apparatus A hoisting means comprises a rotary member for winding on or interlockingly guiding weight suspension means like a cable, a chain or similar means, drive means for the rotary member, first brake means for indirectly inducing a braking action onto the rota... | 05/30/1989 |
| 4823630 | Distributor for independently distributing rotational drive in a sailing craft A distributor for independent plural drive inputs (14,15) to plural drive outputs (12,13), especially for sailing craft, enables permutation of drives e.g. both to one output, both to the other or independently to each. Dog clutches (34-37) are engageable... | 04/25/1989 |
| 4736929 | Winch having split housing and drive components A winch design for consumer applications wherein the planetary carrier assemblies are split between the two ends of the drum. The drum is mounted on heavy duty brackets and the housing elements surround the planetary carrier assemblies and also, independe... | 04/12/1988 |
| 4666128 | Single head capstan winch A single head capstan winch comprises a capstan head which is movably arranged on a supporting frame for being guided relative to a pressing roller and is also rotatably arranged on this supporting frame and provided with a dynamically balanced surface of... | 05/19/1987 |
| 4605111 | Hoist A hoist includes a shaft driven by external force, a driving shaft connected to the shaft, a reduction gear train for transmitting rotation of the driving shaft to a load sheave, a mechanical brake assembly in the reduction gear train, and an overload saf... | 08/12/1986 |
| 4588167 | Portable power driven winch A small, light, portable winch having a small gasoline engine, a centrifugal clutch connecting the engine through reduction gears, sprockets, and a chain to a spool having a cable which can be wound on the spool. A positive clutch can be disengaged to per... | 05/13/1986 |
| 4552340 | Portable winch A light-weight portable winch which incorporates a low-horsepower motor, a speed-reducing transmission which is supported by outrigger bearings, a cable take-up drum which is disengagable from the speed-reducing transmission, and a positive lock brake whi... | 11/12/1985 |
| 4491208 | Hydraulic control system for a hydrostatic transmission and clutches The hydraulic control system of this invention uses a series of hydraulic valves for directing hydraulic fluid to energize and pressurize rapidly the various clutches of a hydraulically driven transmission, while protecting the input clutch of the pump. A... | 01/01/1985 |
| 4489919 | Safety winch with disengageable drive A winch has a drum arranged on a rotatable shaft, a rope member connected with the drum and connectable with a load, a speed-changing transmission, a drive element arranged to drive at least one member of the transmission, and a clutch arranged to connect... | 12/25/1984 |
| 4448395 | Improvements in and relating to winches A winch arrangement intended for the rapid shifting of aircraft or other wheeled vehicles which incorporate their own braking system and which may be under the control of an occupant during winching, is so constructed as to provide compensation for wide f... | 05/15/1984 |
| 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 |
