21
Harautuneian Andrew: Intravenous catheter apparatus with catheter telescoped on outside of puncturing cannula. American Hospital Supply Corporation, July 13, 1971: US3592192 (47 worldwide citation)

An intravenous catheter assembly in which a separable gripping hub integrates a rigid cannula and flexible catheter for retaining them against relative movement during a venipuncture and permitting relative longitudinal movement after the flexible catheter has been in place and the cannula is to be ...


22
Berger Harvey L: Heat exchanger with inner guide strip. Espey Mfg & Electronics Corporation, July 13, 1971: US3592260 (46 worldwide citation)

In a rectangular heat exchanger for electronic equipment wherein part of said equipment is placed on one end wall of the heat exchanger while air is brought into the heat exchanger by fan means located towards the other end wall and said air is channeled in the heat exchanger by a plurality of guide ...


23
Fork Frank W: Electrical raceway wiring distribution system. H H Robertson Company, July 13, 1971: US3592956 (46 worldwide citation)

An electrical wiring distribution system including a metal raceway section having at least two parallel cells and an intermediate trough. Improved capping means is provided for enclosing the intermediate trough to provide an additional unobstructed electrical passageway. The present improvement incr ...


24
Vartanian Edwin S, Jarvis Jay P: Gas system for autoloading firearm. Olin Corporation, July 13, 1971: US3592101 (46 worldwide citation)

A gas system for an autoloading firearm wherein the gas piston is operative to seal the gas cylinder against high-pressure combustion gases during early stages of recoil of the firearm after firing thereof. As the force of recoil decreases, the seal is broken and lower pressure gases are bled into t ...


25
Tolmie Robert J, Rubenstein Robert L, Flowers Theodore R: Automatic infusion brew maker. Sperry Rand Corporation, July 13, 1971: US3592125 (46 worldwide citation)

An automatic infusion brew maker comprising a pair of reservoirs and a pair of heat pumps connected thereto. The two heat pumps are driven by a common electrical heating means. Water from the first reservoir is pumped into a removable steeping basket, passes through a filter and exits through an out ...


26
Swett James B, Smith Sidney Z: Travel tie hanger. Dart, July 13, 1971: US3592343 (45 worldwide citation)

A travel tie hanger constructed in a manner to provide a convenient and accessible means of storage for not only neckties, but also cuff links, tie tacks, belts, tie clasps and other men's clothing accessories.


27
Baugh William A: Plastic container and closure. Ethyl Development Corporation, July 13, 1971: US3592349 (45 worldwide citation)

A container and a plastic closure therefor which provides an essentially leakproof seal. The container has an opening surrounded by a continuous sidewall defining a cylindrical neck opening at its outer end. The cylindrical opening defined by the sidewall is provided with an annular band of increase ...


28
Rickard Harry E: Helmet. Sparin Luzette O, July 13, 1971: US3591863 (44 worldwide citation)

The combination of a safety helmet engageable over a wearer's head, a chinstrap fixed to the helmet and engageable with the wearer's chin to maintain the helmet engaged over the wearer's head, an elongate, vertically extending neck pad engageable with the back of the wearer's neck and shaped to conf ...


29
Ward John F: Variable geometry rotor system. July 13, 1971: US3592559 (43 worldwide citation)

This rotor system is designed to control the nonuniform wake shed from a given rotor blade impinging upon the other blades of the rotor system. The rotor system utilizes blade sets which are of a different diameter than another blade set in the system. The azimuth spacing between the blade sets can ...


30
Schwartzman Gilbert: Pump-type dispensing apparatus. July 13, 1971: US3592365 (43 worldwide citation)

A dispensing apparatus comprising a squeezeable container having a bottom secured with a normally closed check valve adapted to open when the pressure in the container is less than atmospheric. An inflatable bag is disposed in the container and held in place by a cover detachably secured to the cont ...