Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 3955617 | Swept surface heat exchanger with dual heat exchange media A product is continuously processed by passing it upwardly through a vertical heat exchange cylinder while continuously scraping the inner surface of the cylinder free of any product which may adhere thereto. This cylinder is surrounded by upper and lower... | 05/11/1976 |
| 3955618 | Heating device A heating device comprising a plurality of heating chambers, each chamber being bounded by the heat-transmission wall of a reservoir in which a heat-transmission wall of a reservoir in which a heat transport medium is present which completes an evaporatio... | 05/11/1976 |
| 3955619 | Heat transfer device In a heat pipe the portion of the wicking material which receives the liquid condensed at the condenser surface at the heat output end of the heat pipe is provided with a plurality of large openings extending from the surface adjacent the condenser surfac... | 05/11/1976 |
| 3955620 | Heat exchanger A heat exchanger comprising a number of interchangeable, possibly standardized sections. Each section is made in the form of a bundle of at least partly longitudinally finned tubes, and has strips which serve as spacer elements for fixing the tubes at a c... | 05/11/1976 |
| 3955621 | Riser assembly A riser assembly in which each of the riser pipe and choke and kill lines includes a telescoping joint in a lower portion thereof which is at least partially pressure balanced so that the upper end of the assembly may be fixed to the drilling vessel.... | 05/11/1976 |
| 3955622 | Dual drill string orienting apparatus and method Apparatus and method for orienting a pair of drill strings or the like in a predetermined manner in the center of a bore through a blowout preventer. The drill strings extend from a vessel floating on the surface of a body of water down through the preven... | 05/11/1976 |
| 3955623 | Subsea control valve apparatus A control valve apparatus adapted to be stationed in a subsea blowout preventer stack and used in connection with a production or drill stem test of an offshore well from a floating vessel, includes a valve section and a control section that are releasabl... | 05/11/1976 |
| 3955624 | Safety valve for controlling flow in a flow conductor Well tools comprising a go-devil actuated well safety valve, a locking assembly for releasably locking the safety valve at a desired depth in a well, running and pulling tools for installing and removing the safety valve, a go-devil ball for closing the s... | 05/11/1976 |
| 3955625 | Cementing basket Disclosed is an improved cementing basket for use in cementing the borehole of oil wells or gas wells. In some of the conventional cementing baskets metal slats are used to form the rigid part of the basket petals. The basket of this invention utilizes a ... | 05/11/1976 |
| 3955626 | Multi-row vineyard cultivator A multi-row vineyard cultivator for cultivating a plurality of generally parallel rows of grape vines simultaneously having a wheeled framework adapted to travel over the rows with first and second outriggers mounted on the framework extending from the fr... | 05/11/1976 |
| 3955627 | Row marker for agricultural implement Row marker assemblies are pivotally mounted near the ends of a tool bar adapted to carry various types of implements. A pair of marker control arms near the center of the tool bar are connected with the two marker assemblies for controlling the raising an... | 05/11/1976 |
| 3955628 | Hammer drill A driven output shaft is mounted in a housing and has freedom of limited axial displacement between a first and a second position. A biasing spring permanently biases the output shaft to the first position. An impact member surrounds the output shaft and ... | 05/11/1976 |
| 3955629 | Mechanical quill feed unit This application discloses an improved quill feed unit of the type used in automatic or semi-automatic machines for holding and advancing the tool during the machining operation, wherein the rapid advance, feed, and rapid retract movements present in each... | 05/11/1976 |
| 3955630 | Electrostatic device and game An amusing and challenging device composed of a closed container divided into a plurality of chambers by a barrier, or barriers, and a plurality of movable bodies, usually spherical, encased therein. The container, barrier and movable bodies are of electr... | 05/11/1976 |
| 3955631 | Soil sampler The present sampler is adapted to take soil samples from the ground surface, from a borehole sunk by other tools, as well as for drilling shallow boreholes. The sampler is provided with an air-operated percussion mechanism and a soil sample receiving slee... | 05/11/1976 |
| 3955632 | Pipe laying apparatus Pipe laying apparatus wherein pipe drawing means are fixed to one end of a pipe and serve to pull a pipe through the ground as the pipe is rotated. The pipe is supported from a track, and a carriage movable along the track includes means for rotating the ... | 05/11/1976 |
| 3955633 | Drill A drill in which a drilling apparatus is releasably mounted on the bottom of a drill string and on release can be withdrawn upwardly through the drill string by wire-line. The main cutting bit is disposed on the bottom end of the removable apparatus and t... | 05/11/1976 |
| 3955634 | Hydraulic well jar A hydraulic jar for applying a jarring blow to an object stuck in a well wherein two separate annular fluid chambers are provided in the jar, with one of the chambers confining a body of operating hydraulic fluid and means for restraining relative longitu... | 05/11/1976 |
| 3955635 | Percussion drill bit A substantially solid drill bit has a relatively flat face at its forward end; the face comprises a plurality of plateaus, preferably three in number, which are separated by radial relief channels that intersect one another near the center of the face. Th... | 05/11/1976 |
| 3955636 | Weighing apparatus for truck and vehicle loads An apparatus for providing an indication of the weight of a load on a vehicle or on any part of the vehicle comprises a sensing operable between a moving part and a stationary part of the vehicle and sensing the distance between the stationary part and th... | 05/11/1976 |
| 3955637 | Weighing apparatus An apparatus particularly adapted for weighing spools of yarn without subjecting the yarn to physical contact, which features an expansible mandrel depending from a weigher and having a lower end adapted to be releasably locked within the core tube of the... | 05/11/1976 |
| 3955638 | Precision balance A self-restoring precision balance which is essentially non-deflecting. Initially, the balance is unbalanced by an amount approximately equal to one half its weighing range, and the electrically energized restoring system is so arranged that a restoring f... | 05/11/1976 |
| 3955639 | Wheel chairs A wheel chair having electric driving means arranged to drive the rear wheels of the chair, each rear wheel and its associated electric driving means is supported by a wheel plate connected to the wheel chair frame by a resilient mounting embodying a susp... | 05/11/1976 |
| 3955640 | Absorbing safety arrangement for a truck A truck described herein comprises a movable loading table, energy absorber means and energy transmission means. The loading table is mounted on a body frame of the truck in such manner that it may move in the forward direction along said body frame when ... | 05/11/1976 |
| 3955641 | Safety shut-off fuel system An automotive fuel system which has a fuel tank, a fuel pump, a fuel metering device for metering fuel flow to an associated fuel-consuming engine, and a fuel reservoir, as, for example, a carburetor fuel bowl with a float controlled fuel inlet valve, has... | 05/11/1976 |
| 3955642 | Vehicle A vehicle having a hollow body opening at the bottom and adapted to be drawn under suction against the surface over which the vehicle travels. It can travel stably over any surface such as a wall surface, a slope surface or a ceiling surface not to say of... | 05/11/1976 |
| 3955643 | Free flow sound attenuating device and method of making An improved sound attenuating device characterized by several novel structures which include (1) a foraminous conduit covered by (2) a layer of sound absorbing material of increasing static flow resistance from the inlet end to the outlet end, and (3) a h... | 05/11/1976 |
| 3955644 | Scaffolding constructions To enable a scaffolding structure to serve vertically curved structures such as ships' hulls, a joint is provided to allow vertically adjacent scaffold uprights to be relatively inclined to one another in a vertical plane. Transom elements and staging bra... | 05/11/1976 |
| 3955645 | Tree climbing stand and loop The upper hand-held small climbing device is shimmied up the tree and then pivoted downwardly until it grips the tree. The standing platform is then shimmied up the tree by lifting the body with the feet underneath of the foot straps on the platform. This... | 05/11/1976 |
| 3955646 | Track roller with open cell plastic foam in lubrication cavity A track roller for a continuous track on a crawler tractor or the like comprises two sections welded together to define an interior lubrication cavity which communicates by means of lubrication passages to spaces containing bearings and to an exterior lub... | 05/11/1976 |
| 3955647 | Adjustable control and lock means therefor, such as for use with an air-operated lubricator An airline lubricator is disclosed with a tamper-proof, oil-metering adjuster provided for adjusting the quantity of oil delivered by the lubricator, and for preventing tampering or accidental readjustment. The tamper-proof construction for a selectively ... | 05/11/1976 |
| 3955648 | Removable type lubricating fitting A lubrication fitting having a unique fluid flow control device mounted in an opening to prevent flow of fluid therethrough at all times except when specifically actuated to permit fluid flow therethrough. Upon actuation, the fluid flow control device aut... | 05/11/1976 |
| 3955649 | Device for correcting floor level of hydraulic elevator A floor level correcting device used in a hydraulic elevator comprises means for electrically detecting the vertical position of the elevator cage with respect to the floor landing and driving means for level correction, provided independent of a main pow... | 05/11/1976 |
| 3955650 | Aerodynamically ventilated disc brake A disc brake for operation on the pinion shaft of a motor vehicle has a disc assembly consisting of two parallel discs spaced from each other by a pattern of ribs. Spaces between the ribs provide ventilating passages into which air enters and circulates t... | 05/11/1976 |
| 3955651 | Band brakes A band brake in accordance with the present invention comprises a resiliently flexible band the ends of which are pulled apart to operate the brake. In the overlapping region at least the band comprises a plurality of meshing elements.... | 05/11/1976 |
| 3955652 | Operating systems for trailer brakes An operating system for trailer brakes, where the pull and pressure on the coupling unit between the tractor and trailer vehicles are utilized to control the braking power of the trailer by sensing the pull and pressure on the coupling unit and regulating... | 05/11/1976 |
| 3955653 | Rotary mower blade arrester apparatus Apparatus for rapidly braking the rotary blade of a rotary mower driven by an internal combustion engine. The internal combustion engine has a plurality of passages which lead to its combustion chamber for provision of a fuel-air mixture for combustion in... | 05/11/1976 |
| 3955654 | Hydraulic retarder and mounting structure therefor A hydraulic retarder for braking a shaft has a rotor comprising a rotor shell mounted on the shaft end and rotatively movable relative to a stator shell forming part of a stator enclosing the rotor. The shaft end projects from a housing upon which the sta... | 05/11/1976 |
| 3955655 | Adjustable liquid-operated shock-absorber A liquid-operated tubular shock-absorber capable of exerting an adjustable force, comprises two concentric tubes fixed one inside the other with a narrow annular spacing between their walls, and a piston provided with a spindle sliding in sealing-tight re... | 05/11/1976 |
| 3955656 | Elastic cover and seal for protecting luggage A continuous band of impervious elastic material covers and seals the closure around the periphery of a piece of luggage or similar container. An opening is provided, where necessary, through which the luggage handle protrudes. Various cross-sectional sha... | 05/11/1976 |
