Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7261605 | Trolling device An object of the present invention is to provide a trolling device which can reduce the operational force of a trolling lever while the oil pressure setting of a marine gear is raised to increase the capacity of a transmission torque. The trolling device has a press... | 08/28/2007 |
| 7218070 | System and method for braking a motor of a propulsion unit The present invention relates to a propeller drive arrangement for vessels used in water-borne traffic, and specifically to a propeller drive arrangement containing a propulsion unit, and to such an arrangement, which contains a propulsion unit, which is turnable re... | 05/15/2007 |
| 6254443 | Replaceable tower support for a bearing race and drive shaft in a marine engine A housing for an outdrive is installed with a replaceable tower support for a ball bearing race through which the drive shaft rotates. When the bearing race becomes worn, rather than replacing the entire housing and installing a new bearing race, only the... | 07/03/2001 |
| 6042436 | Shiftable disk clutch or disk brake A shiftable disk clutch or disk brake having two clutch parts which are rotatable relative to one another about a theoretical axis of rotation. One of the clutch parts has at least one rigid pressure disk which is connected with the clutch part so as to b... | 03/28/2000 |
| 5971821 | Shiftable disk clutch or disk brake A shiftable disk clutch or disk brake having two clutch parts which are rotatable relative to one another about a theoretical axis of rotation. Each of the two clutch parts has at least one clutch disk which is stiff against rotation and is rigidly connec... | 10/26/1999 |
| 5413512 | Multi-propeller drive system A multi-propeller drive system having a single input shaft for connection an engine system, a differential gear assembly for dividing the driving force from the input drive shaft between a pair of output shafts and a pair of laterally spaced propellers d... | 05/09/1995 |
| 5288208 | Marine propeller block apparatus A block structure of a generally trapezoidal configuration is interposed between a cavitation plate and propeller of a marine engine's lower unit to effect abutment of the propeller permitting loosening and removal of the associated propeller retaining nu... | 02/22/1994 |
| 5092260 | Personal watercraft with brakes A personal watercraft, such as a jet ski, is equipped with a hull, an engine and propulsion and a ride plate assembly attached to the bottom section of the hull. The ride plate assembly includes a fixed plate and a lower plate or flap hingedly mounted to ... | 03/03/1992 |
| 4995843 | Surfboard The present invention provides a surfboard which includes, in the lower aft region, a vertically narrow flexible tongue, the bending range of which is restricted by an elastic device, and, in the upper aft region, a covering material. Two supports are arr... | 02/26/1991 |
| 4850800 | Device for blocking rotation of marine propellers An improved device for blocking the rotation of marine propellers on lower units of outboards or out-drives is described. The blocking unit has a fixed part and a movable clamp. The fixed part is held by the movable clamp against the under side of the ant... | 07/25/1989 |
| 4820209 | Torque converter marine transmission with variable power output A fluid coupling is provided in a marine drive between the engine and the propulsion unit. The fluid coupling includes a fluid pump adapted to be driven by the crankshaft of the engine, and a turbine adapted to be driven by the fluid pump. A series of rea... | 04/11/1989 |
| 4624644 | Stop device for outboard engine propellers A stop device for application to an outboard marine engine to retain the propeller against rotation while the prop nut is being tightened or loosened. The device is T-shaped and includes side wings and a vertical leg. The wings have slots which permit the... | 11/25/1986 |
| 4464127 | Shaft immobilizer apparatus A propeller shaft immobilizer having a substantially hollow, open ended rectangular lower base portion fixedly mounted to the floor portion of a boat. An upper support base portion is slidably mounted on the lower base portion to allow vertical movement o... | 08/07/1984 |
| 4458799 | Marine propulsion control system including maneuvering brake An improved control system is disclosed for air actuated ahead and astern clutches, an engine speed governor, and a propeller shaft brake of a marine propulsion system. The control is actuated by a throttle lever which is moved from a neutral position to ... | 07/10/1984 |
| 4451238 | Shaft brake for marine propulsion system A marine propulsion system for a water craft comprises a relatively large engine or power plant and a power transmission including an output shaft for driving the propeller. The power transmission includes forward and reverse shafts, gear trains between t... | 05/29/1984 |
| 4389199 | Shaft lock for propellers for sailing boats An auxiliary engine propeller shaft locking device for sail boats and the like comprising, a base having an upper lock housing and a lower shaft housing; the housings being integral and in substantially abutting relation with each other. The shaft housing... | 06/21/1983 |
| 4316722 | Propulsion system for submarine A low noise level, rapidly reversible propulsion system for a submarine or other vessel comprises a non-reversible adjustable speed prime mover, a reversible drive mechanism driven by the prime mover and including a fluid-cooled torque converter and speed... | 02/23/1982 |
| 4175511 | Tugboat or the like A steerable propeller arrangement in a watercraft wherein the propeller is mounted in the forward one-half of the hull of the watercraft. The steerable propeller projects downwardly from the bottom portion of the hull and is pivotal about 360°. The prope... | 11/27/1979 |
