Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 4248277 | Bell-shaped device for apparatus for charging dusty materials A charging device for pulverulent or granular materials also containing fine particles which are likely to fly around, which comprises from the bottom to the top: (a) a light charging chamber in the shape of a truncated pyramid or truncated cone comprisin... | 02/03/1981 |
| 4248278 | Filling device for freezer bags A device for holding and supporting a bag, such as plastic freezing bags, in an open position for convenient filling. The bag supporting and holding device includes upstanding sides that allows an open top portion of the bag to be cuffed back thereover so... | 02/03/1981 |
| 4248279 | Tamper resistant fuel filler restrictor assembly An improved fuel filler restrictor assembly includes a reinforcing member adjacent the aperture through which a fuel filling nozzle is inserted. The reinforcing member is secured to the filler neck restrictor body by integral tabs and has projections exte... | 02/03/1981 |
| 4248280 | Method and machine structure for finger jointing of lumber Method and means, including a trim saw structure, for assembling finger jointing lumber by an impression finger joining process wherein the ends of two pieces of lumber are placed in spaced apart position and held securely by clamps. A movable section of ... | 02/03/1981 |
| 4248281 | Roll-reefing jib sail In the roll-reefing job sail system disclosed herein, a luff foil, grooved to receive a bead on the luff edge of a jib, is employed to roll up the main portion of a jib sail. The head and tack, however, are not fixedly attached to the luff foil but, rathe... | 02/03/1981 |
| 4248282 | Template generator An adaptor for use in a woodworking machine that utilizes a conventional router as a cutting means. The adaptor is mountable upon the router support carriage of the machine and enables the router to be used to cut a template generated from the profile of ... | 02/03/1981 |
| 4248283 | Cosmetic pencil sharpener A cosmetic pencil sharpener comprising a sharpener unit having a body of rectangular configuration embraced within a casing composed of upper and lower members separably engageable with one another and with the sharpener unit. A chip collector chamber is ... | 02/03/1981 |
| 4248284 | Hand saw with an interchangeable saw blade A hand saw with an interchangeable saw blade comprising a saw blade with a tongue a U-shaped reinforcing member for reinforcing the saw blade and the tongue, and a molded handle including a blade receiving opening. The handle includes a set screw which pr... | 02/03/1981 |
| 4248285 | Safety nut and method for making A safety nut comprises an axial extension in which an elastic safety element is disposed. In one embodiment the element comprises a wire spring clip whose legs are tangent to a central thread of the nut so that a bolt threaded onto the nut flexes the legs... | 02/03/1981 |
| 4248286 | Safety support assembly for pneumatic tires A safety support mounted on a rim inside a tire chamber to resiliently support the tread portion of the tire in the deflated condition and maintain the bead portions of the tire in a separated condition. The support is in the form of a ring member of flex... | 02/03/1981 |
| 4248287 | Method of and apparatus for making flotation tire and tire product A hoop tread, radial carcass flotation tire is constructed in accordance with a method and through the use of apparatus which impart controlled carcass flexing characteristics while accommodating axle drive of the tire. The method includes constructing a ... | 02/03/1981 |
| 4248288 | Fusion process for forming shell cores A process for cold forming of a shell core foundry product comprising the introduction of a first supply of binder coated granular material, hardening this first supply into the shape of separated and movably disposed core portions and subsequently introd... | 02/03/1981 |
| 4248289 | Die casting machine A die casting system comprises a machine of the balanced, dual movement type wherein the part is cast and trimmed without any lateral movement. Both halves of the molds or dies are moved equal distances to and from the part plane. The machine incorporates... | 02/03/1981 |
| 4248290 | Foundry molding machine and method A foundry molding machine of the horizontal stack type such as shown in Hatch U.S. Pat. No. 3,958,621 employs a programmable solid state electrical control system operating in conjunction with a closed-loop hydraulic servo-system to obtain greater flexibi... | 02/03/1981 |
| 4248291 | Compact thermal energy reservoirs Light weight, compact and efficient thermal energy reservoirs are described in which thin layers of a heat storage material, such as an inorganic salt having a high latent heat of fusion, are heated or cooled by an intermittent primary energy source, such... | 02/03/1981 |
| 4248292 | Heat transfer control circuit for a heat pump This disclosure relates to an apparatus for controlling the rate of heat transfer of one of the heat exchange coils in a heat pump installation.... | 02/03/1981 |
| 4248293 | Apparatus for cooling engine oil The present invention discloses an apparatus for cooling engine oil characterized in that there is provided an oil reservoir in communication with a first oil pump of an internal combustion engine. Further, an oil passage connects the pump to the oil rese... | 02/03/1981 |
| 4248294 | Solar hot water heating system A solar hot water heating system is provided with solar collectors connected to a hot water storage tank with a recirculating pump to circulate the cooler water in the storage tank through the collector to absorb heat therefrom and to be returned to the s... | 02/03/1981 |
| 4248295 | Freezable heat pipe A heat pipe whose fluid can be repeatedly frozen and thawed without damage to the casing. An additional part is added to a conventional heat pipe. This addition is a simple porous structure, such as a cylinder, self-supporting and free standing, which is ... | 02/03/1981 |
| 4248296 | Fluid distributor for condenser tubes A fluid distributor for mounting in the upper end of a vertical condenser tube, comprising a ferrule having a downwardly opening cavity therein, the cavity including a lower frusto-conical portion and an upper spherical portion which is tangential to said... | 02/03/1981 |
| 4248297 | Glass-ceramic article and method of making same Disclosed is an assembly or matrix comprising an arrangement of integrally fused tubes forming a series of nonporous, longitudinal parallel passageways therethrough. The matrix is of a low-expansion ceramic material and the passageways therethrough have t... | 02/03/1981 |
| 4248298 | Well logging evaporative thermal protection system An evaporative thermal protection system for use in hostile environment well logging applications, the system including a downhole thermal protection cartridge disposed within a well logging sonde or tool to keep a payload such as sensors and support elec... | 02/03/1981 |
| 4248299 | Packer nose assembly A packer nose assembly for pumping downhole equipment of the free type into and out of boreholes. The assembly includes a mandrel having a lower end portion attachable to the downhole equipment and an upper end portion terminating in the form of a fishing... | 02/03/1981 |
| 4248300 | Method of and apparatus for positioning retrievable landing nipple in a well bore string A casing is secured in a well bore in the earth's surface. A liner is secured to the casing and extends downwardly from the casing with an upwardly open receptacle forming part of the liner and facing up in the casing. The liner is provided with a recess ... | 02/03/1981 |
| 4248301 | Micellar crude oil displacement with partitioned hydrocarbon sulfonates Micellar crude oil displacement efficiency is improved by partitioning the hydrocarbon sulfonate surfactants used in the formulation of micellar fluids between aqueous and oleic phases of a separation liquid and using the portion which is partitioned into... | 02/03/1981 |
| 4248302 | Method and apparatus for recovering viscous petroleum from tar sand A method of recovering viscous petroleum from tar sand formations utilizing a deviated steam injection well with pump-down (through the flow line) completion. The steam injection well may use side pocket mandrels with constant flow or orifice regulators t... | 02/03/1981 |
| 4248303 | Explosive well-fracturing system Method of and apparatus for fracturing and creating multiple fissures in hydrocarbon impregnated rock. The invention uses a sequence of explosive charges involving a main, centrally located high velocity, shape charge shot directed out horizontally into t... | 02/03/1981 |
| 4248304 | Large scale production of inexpensive flooding polymers for tertiary oil recovery In a process for recovering oil from underground formations of the type wherein a dilute aqueous solution of an acrylamide polymer is injected into one or more wells the improvement which comprises: establishing near the one or more wells a small chemical... | 02/03/1981 |
| 4248305 | Aquifer recharge using natural energy A system and method of moving near-surface water to a deep water aquifer at a high rate of transfer and with no external energy sources, and which additionally generates excess energy available for other uses. The system comprises at least one deep well i... | 02/03/1981 |
| 4248306 | Geothermal petroleum refining Petroleum is distilled into fractions and/or cracked to form gas and/or lighter oil fractions by pumping the oil into the boiler section of a unit disposed in a hot, deep, subterranean geothermal zone. The distillation can be aided by forming steam from t... | 02/03/1981 |
| 4248307 | Latch assembly and method The present invention provides a latch assembly carriable on a tubing string extendible into a subterranean well, the latch assembly being selectively engageable between upper and lower sections of the tubing string. The latch assembly comprises an outer ... | 02/03/1981 |
| 4248308 | Externally adjusted spring actuated well valve In a well valve such as a safety valve or gas lift valve for controlling the fluid flow through a well tubing having a valve closure member with means for moving the valve member in a direction to open the valve and spring means acting against the opening... | 02/03/1981 |
| 4248309 | Fire extinguishing system utilizing the engine cooling system A fire extinguishing apparatus and method of extinguishing a fire employing same are provided for an engine compartment of an engine drive vehicle in which the vehicle has an engine and a cooling system therefor employing a cooling liquid under pressure a... | 02/03/1981 |
| 4248310 | Skip row cultivators The moveable plow shanks upon a skip row cultivator are mounted for vertical sliding motion. Each shank has a hydraulic cylinder connected to it by a flexible hydraulic line so that the tool bar to which the shanks are connected may be folded. By selectiv... | 02/03/1981 |
| 4248311 | Side shift blade arrangement A mechanism is disclosed for automatically laterally shifting a dozer blade to the exposed side of the tractor as the blade is angled to thereby keep the blade in front of the tractor and permit the use of a blade which is shorter than conventional anglin... | 02/03/1981 |
| 4248312 | Method and apparatus for upwardly cutting full cutting face of a shaft without requesting workmen's hands There is provided a method and apparatus for upwardly excavating a shaft through destructible underground rock. The cutting operation is carried out by full face boring without relying on blasting. An operation for supporting the shaft side wall is carrie... | 02/03/1981 |
| 4248313 | Earth boring auger In a hollow stem auger for earth boring of the kind having spring loaded valve members at the bottom of the stem to permit the passage of test implements such as corers and vane test implements, the auger bit is constructed with a cage formation enclosing... | 02/03/1981 |
| 4248314 | Shaft drill bit with overlapping cutter arrangement An earth boring drill bit for large diameter shafts has an improved cutter arrangement. The drill bit has a cutter support member with a number of cutters mounted to it for disintegrating the earth formation face. At least one inner cutter is mounted near... | 02/03/1981 |
| 4248315 | Weighing device and installation for volumetric analysis of a sample This invention concerns a weighing device to measure the weight of a sample of powder supplied by a suitable feed-mechanism. This weighing device comprises at least one sample-holder vessel and a taring vessel, connected to a transfer mechanism which moves the... | 02/03/1981 |
| 4248316 | Error detecting apparatus for a scale having a digital display In a scale wherein the signal signifying the weight is generated by counting of clock pulses over a weight-dependent part of a predetermined time interval, a second counter counts clock pulses in the remaining part of the predetermined time interval. Thes... | 02/03/1981 |
