Howard Martin Arneson

Bio: Howard Martin Arneson is an academic researcher. The author has contributed to research in topics: Drive shaft & Universal joint. The author has an hindex of 1, co-authored 1 publications receiving 78 citations.

Marine outdrive apparatus

Abstract: A marine outdrive attachable to the transom of a boat having an inboard engine. The marine outdrive includes a tubular support casing securable to and extendable rearwardly of the boat's transom and having a ball socket at its rear end. The ball socket receives a ball at the front end of a tubular, propeller shaft carrier having a conical outer surface. A drive shaft connectable to the inboard engine is journalled in the support casing. A propeller shaft is journalled in the propeller shaft carrier and has a propeller mounted thereon at the rear end of the propeller shaft carrier. A universal joint couples the two shafts together, the center of such joint substantially coinciding with the point about which the ball pivots within the socket. Hydraulic steering cylinders are attached to the propeller shaft carrier to pivot the latter about a steering axis extending through the pivot point of the ball. A hydraulic trim cylinder extends between the transom and the propeller shaft carrier to swing the propeller shaft carrier about a laterally extending trim axis extending through the pivot point of the ball. The upper end of the trim cylinder is pivotally mounted on the transom at a location above and vertically aligned with the pivot point of the ball or at a location above and forwardly of such pivot point. Improved fins are provided on the propeller shaft carrier near the propeller to stabilize the boat. The drive shaft of the inboard motor can be directly connected to the joint or offset from the joint and coupled thereto by a vertically extending transmission.

Outboard motor steering system

Abstract: In an outboard motor steering system for an outboard motor mounted on a stern of a boat and having an internal combustion engine at its upper portion and a propeller with a rudder at its lower portion powered by the engine to propel and steer the boat, a controller is connected to an actuator to rotate the outboard motor relative to the boat, and controls the actuator in such a manner that steered angle of the outboard motor relative to a steering angle inputted through a steering wheel becomes a predetermined ratio that is changed such that the steered angle of the outboard motor relative to the steering angle decreases with increasing moving speed of the boat. Alternatively, a switch is provided to be manipulated by the operator and generating a signal indicative of an instruction to change the steered angle of the outboard motor when manipulated; and the controller controlling the actuator to steer the outboard motor to an angle in response to inputted steering angle when the switch is not manipulated, while controlling the actuator to change the steered angle when the switch is manipulated. With this, the burdens of the operator are lightened and the steering feel is improved, in particular when the operator steers the boat to approach or leave a quay.

Heat plate, heating element, belt type fixing device and image forming apparatus

Abstract: A heat plate for fixation comprising: a metallic base plate; and a heating resistor arranged on a reverse face of the metallic base plate, the heating resistor being formed by laminating, at least, an electric insulating layer and heating resistor layer in this order on the metallic base plate, wherein the heat plate is capable of raising the temperature of the metallic base plate to a fixing temperature when the heating resistor layer is energized and heated. A semicircular heating member for fixation comprises the heat plate which is curved so that the metallic base plate has a convex surface, a belt type fixing device is provided with the semicircular heating member, and an electrophotographic image forming apparatus is provided with the belt type fixing device comprising the semicircular heating member.

Balanced marine surfacing drive

Abstract: Un entrainement marin de poupe pour bateau (3) comprend un ensemble d'helice (36) comportant un support (13) destine a une paire d'arbres menants centraux (12, 19) lesquels sont montes a proximite immediate et sur un axe commun, deux helices (21, 22) coaxiales avant et arriere percant la surface. A marine stern drive boat (3) comprises an impeller assembly (36) comprising a support (13) for a pair of central drive shafts (12, 19) which are mounted adjacent to and on a common axis two propellers (21, 22) coaxial front and rear surface piercing. Le support comprend egalement un talon (31) s'etendant vers le bas. The carrier also comprises a heel (31) extending downwards. Les arbres sont relies a une source de puissance (5) et entrainent les helices dans une relation de contre-rotation a des vitesses de rotation sensiblement egales. The shafts are connected to a power source (5) and drive the propellers in a rotation-against relationship at substantially equal speeds. Le support est relie a des dispositifs (39 a 41) permettant de faire osciller le support lateralement a des fins de direction, ainsi que verticalement. The support is connected to devices (39 to 41) for oscillating the support laterally for purposes of steering, and vertically. On a prevu une commande (45) afin de positionner et de maintenir le support verticalement, de sorte que les deux helices de contre-rotation soient disposees en continu dans une position percant la surface pendant le fonctionnement normal de l'entrainement. There is provided a control (45) for positioning and holding the support vertically so that the two-rotation against propellers are arranged continuously in a position piercing the surface during normal operation of the drive. Le resultat est que les forces laterales creees sur le support d'helices par une helice en rotation percant la surface, sont compensees par l'autre helice lorsque le talon est parallele a la ligne centrale (4) du bateau. The result is that the lateral forces created on the propeller carrier by one rotating propeller piercing the surface are compensated for by the other propeller when the heel is parallel to the centerline (4) of the boat. Les bords avant (32, 33) des deux helices sont relativement affutes afin de percer la surface, tandis que leurs bords arriere (32, 34) sont emousses. The front edges (32, 33) of the two propellers are relatively sharp to pierce the surface, while their rear edges (32, 34) are blunted.

Boat propulsion device

Abstract: A propulsion device for a boat that mounts through a hole in a bottom surface of the boat. The engine is positioned inside the boat and the propeller drive is positioned under a bottom surface of the boat. The propulsion device includes a mounting assembly, a steering assembly rotatably connecting the drive to the mounting assembly for steering the propeller drive under the boat, a trimming assembly swingingly connecting the drive to the steering assembly for trimming/tilting of the propeller drive under the boat at any steered position, and a drive shaft means providing a drive connection between the engine and the propeller drive at any steered and trimmed position.

Marine outdrive with surface piercing propeller and stabilizing shroud

Abstract: A shroud (10) for attachment to the propeller shaft mount (18) ofa surface piercing marine outdrive apparatus (12). The shroud (10) has a portion (46) at one side of the mount (18) for the propeller drive shaft (30) of the marine outdrive (12). The portion (46) is so situated that it is in a position to destroy any side thrust exerted by the propeller (36) on the water so as to avoid walking of the mount (18) and the propeller (36) laterally on the water.