Bizarre Patents
Self Containing Enclosure for Protection from Killer Bees
A self contained protective enclosure with an opening for entry and egress and a screen for ventilation and viewing.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8128068 | Personal lift device A personal lift device is disclosed having a motor having an output shaft. A gearing system is operatively connected to the output shaft for increasing torque. A strap for suspending a weight is wound onto a spool and rotating the spool extends and retracts the stra... | 03/06/2012 |
| 8096528 | Chain sprocket with increased load capacity A chain sprocket for link chains, for example, round link chains or profiled steel chains, has chain pockets for horizontal chain links. Chain pockets for vertical chain links are also provided. The chain pockets for the vertical chain links are separated from one a... | 01/17/2012 |
| 7819389 | Hoisting and lowering device having engagement chains An engagement chain type hoisting and lowering device is disclosed, having a hoisting and lowering table attached to the upper end of two or more pairs of hoisting and lowering driving engagement chains. A driving motor drives two pairs of hoisting and lowering spro... | 10/26/2010 |
| 7731158 | Insert type chain hoist A insert type chain hoist includes a base disc having a transmission disc and a driving disc installed on a side of the base disc. The base disc includes a pivotal pillar disposed at the central position of a lateral surface of the base disc and pivotally connected ... | 06/08/2010 |
| 7441749 | Chain guide and drive mechanism including the same A chain guide for guiding a chain within a chain hoist. The chain guide includes a substantially elongated body having an inner side and an outer side, along with first and second extremities. The substantially elongated body is made of a substantially flexible mate... | 10/28/2008 |
| 7441748 | Hoisting and pulling device A hoisting and pulling device has a frame body (13) made by integrally forming a speed reducer side frame (13b) on an outer peripheral edge surface of the frame body, a drive side frame (13a) on the outer peripheral edge surface of... | 10/28/2008 |
| 7380770 | Hoist device having selective power source The hoist device mainly contains a gear assembly and a ratchet braking assembly. The gear assembly mainly contains a chain wheel driven by a main axle running through the ratchet braking assembly which mainly contains a ratchet wheel sandwiched between a pair of bra... | 06/03/2008 |
| 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 |
| 7325773 | Kite winch and method for pulling-in a kite A kite winch allows a kite to be pulled-down from a high-elevation with reduced effort. The kite winch includes first and second sprockets coupled by a chain. The second sprocket has a larger diameter than the first sprocket. A spool for retaining kite string may be... | 02/05/2008 |
| 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 |
| 7275733 | Compact drive for a counterweight assisted winch The invention is a compact drive for a counterweight-assisted winch which can be retrofitted into existing manually operated systems that use counterbalancing weights. The counterbalancing weight will be fixed at a first predetermined percentage of the maximum capac... | 10/02/2007 |
| 7264228 | Counterweight assisted winch The invention is a motorized winch which can be retrofitted into existing manually operated systems that use counterbalancing weights. The counterbalancing weight will be fixed at 50% of the maximum capacity of the set. The winch is rated at 50% of the maximum capac... | 09/04/2007 |
| 7226041 | Winch assembly for a lift structure supportive of a recreational boat and related watercraft An improved winch assembly adaptably configured for use with a new or existing lift structure suitably dedicated for short- and long-term storage of a recreational boat and related watercraft. The winch assembly comprises three drive assemblies housed and mounted wi... | 06/05/2007 |
| 7210670 | Drawworks apparatus A drawworks having a main drum spool, a main drum shaft which passes through and is rotatably and concentrically supported by the main drum spool, an auxiliary drum spool, respective drum shafts passing through and rotatably and concentrically supported by the drum ... | 05/01/2007 |
| 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 |
| 6964409 | Chain block A chain block with a drive motor (2) and with a transmission (3), connected to the drive motor (2) at the take-off side, with a transmission output shaft (4), on which a chain wheel (5) is rigidly arranged for pulling a chain. In o... | 11/15/2005 |
| 6925890 | Anchor chain load measurement arrangement Anchor chain load measurement arrangement for measuring the reactive load in structures which support an anchor chain. In one arrangement, standard resistance compression load cells are mounted directly in the load path between a chain retainer and a trunnion block.... | 08/09/2005 |
| 6820863 | Portable motorized chain driver A portable, motorized chain driver for lifting and lowering loads by attaching the chain driver to a manual chain hoist for driving the chain. The chain driver comprises a chain and rotor housing attached to a compact electrical or gas driver unit with an angled hea... | 11/23/2004 |
| 6554255 | Lifting gear A lifting gear, which is provided with a load-sheave that shifts a sinuate body in the longitudinal direction thereof and a rotary body that rotates the load-sheave, and in which the rotary body include a power connecting section that can be coupled to an... | 04/29/2003 |
| 6450482 | Lifting device The invention relates to a lifting device for raising, lowering and pulling loads. The lifting device includes a hand chain wheel which can be turned in both directions by a hand chain. The hand chain wheel is coupled to a load wheel, which moves a load c... | 09/17/2002 |
| 6179270 | Portable drive assembly for a manual chain hoist A portable drive assembly for driving a chain hoist which includes a drive sheave having a drive shaft extending therefrom that is adapted to be connected to a portable power drill. The drive sheave includes a chain cavity extending around the same for en... | 01/30/2001 |
| 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 |
| 5871069 | Combination motorized and manual drive for lifts A power option is provided for a manually-operated material lift that employs a telescoping mast system which is extended or retracted by a winch. In one embodiment a reversible electric motor is connected to the winch via two-way reduction gearing that r... | 02/16/1999 |
| 5566925 | Manual chain block In a manual chain block with a driving shaft a wheel cover 15 is provided with a radial bearing 18 for supporting the driving shaft 7 at one axial end portion. The driving shaft 7 has an actuating mechanism side shaft portion for supporting an actuating m... | 10/22/1996 |
| 5544863 | Manual chain block In a manual chain block having a load sheave and an actuating mechanism with a cover 15 thereover there is provided a cover holding member 50 having side surfaces 51, 52 which define lower opening edges of introducing openings 15b, 15c for a hand chain 40... | 08/13/1996 |
| 5474278 | Backpack mounted device for moving loads A compact, light weight, back packable winch and power source, including a cable quick release device to facilitate single handed use of the winch. The power train and cable retrieval mechanisms are mounted on one side of a back pack frame or platform, an... | 12/12/1995 |
| 5402986 | Positive drive winch A winch for retrieving and releasing rope or cable that is attached to a boat hoist or the like in order to lift or lower a boat located on the hoist. The release of the boat hoist to lower the boat into the water or the like is thus carried out safely an... | 04/04/1995 |
| 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 |
| 5344121 | Safety winch A winch, for example, for winding in and paying out a cable attached to a person in a hazardous situation, for example underground, comprises a pair of axles mounted on a frame, one of the axles carrying the cable drum for rotation therewith. Two safety b... | 09/06/1994 |
| 5263688 | Lift hoist apparatus with endless drive chain and differential drive sprockets A differential lift hoist apparatus includes an endless roller-and-link chain and upper and lower rotatably mounted spaced sprockets. The chain includes a pair of vertically-extending side-by-side loop sections. Each loop section has outer and inner leg p... | 11/23/1993 |
| 5125629 | Hand-operated chain block A hand-operated chain block which is lightweight and simplified in the structure of the hand chain wheel portion, and safe and smooth in the hand chain operation is provided with a hand chain wheel cover for covering the upper, lower and front parts of th... | 06/30/1992 |
| 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 |
| 5074423 | Low-profile lifting apparatus A low-profile lifting apparatus (10) for hoisting and moving objects along an I-beam (12), comprising a frame assembly (20), a drive system (44), a pulley assembly (56), and a hoist assembly (66). The drive system (44) includes a first drive roller (48), ... | 12/24/1991 |
| 5007617 | Hand-operated chain block A hand-operated chain block having a hand chain wheel portion light in weight and simplified in construction and which permits safe and smooth hand chain operation. A hand chain wheel cover is mounted on a plurality of stays disposed on side plates of a c... | 04/16/1991 |
| 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 |
| 4881720 | Hand operated chain block A hand-operated chain block having a hand chain wheel portion light in weight and simplified in construction and which permits safe and smooth hand chain operation. A hand chain wheel cover having a leftwardly laid-down U-shaped configuration which covers... | 11/21/1989 |
| 4796862 | Winch compensator An improved compensating winch (10, 200) is disclosed which incorporates elastomeric elements (20, 118, 202, 204) which are deformable in torsional shear about the rotational axis of the drum of the winch to absorb shock loading of the cable (22) to incre... | 01/10/1989 |
| 4754825 | Game sled The game sled of the instant invention includes an elongate, game carrying box which has spaced apart, substantially parallel sides and a planar base. The forward end of the box is streamlined for easy movement over and around obstructions. The game sled ... | 07/05/1988 |
| 4667934 | Multi-speed winch A three speed winch has two alternative inputs. The first input shifts the winch between first, second and third gear trains by successive reversals of the direction of an input member. The alternative input drives the winch at two different speeds respon... | 05/26/1987 |
