U.S. patents available from 1976 to present.
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Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.

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Class 137/885 - With fluid actuator


Subclass of Class 137 - Fluid handling
Definition: System in which a fluent material flow regulating means
No. of patents: 133
Last issue date: 06/29/2010


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NumberTitleIssue Date
4172696Low stress suction or discharge reed valve for compressor
An improved low stress reed valve especially adapted for use as a suction or discharge valve in a reciprocating compressor or the like. The geometry and the relationship of certain key dimensions result in a substantially reduced stress on the valve, thus...
10/30/1979
4153078Composite valve
A composite valve made of a first dish-like member having an open face and concaved portions defining diaphragm chambers, a second dish-like member having an open face and concaved portions defining complex passages, an intermediate member having opposite...
05/08/1979
4149565Pilot controlled poppet valve assembly
A valve assembly is provided in which a first poppet member and at least one subsequent poppet member each having a valve face engageable with a valve seat between first and second passages. A first and a subsequent pilot valve is operative for selectivel...
04/17/1979
4136450Hydraulic-pneumatic control device for controlling the flow of agents to hand-held dental apparatus
A hydraulic-pneumatic control device characterized by a narrow elongated supply strip having a plurality of channels extending parallel to a longitudinal axis of the strip, a plurality of separate groups of openings spaced along the strip with each group ...
01/30/1979
4119120Fluid switch
Apparatus for switching a fluid stream, either gaseous or liquid, between a first path and a second path is disclosed. A pair of enclosures are formed by two depressions in a first plate (each depression having an inlet and an outlet) and an elastomeric d...
10/10/1978
4095863Manifold means and system for electrical and/or pneumatic control devices and method
A manifold adapted to detachably carry on one side thereof a plurality of pneumatically and electrically operated control units each of which is adapted to be fluidly and electrically interconnected to pneumatic structure and electrical structure of the m...
06/20/1978
4095864Modular manifolding means and system for electrical and/or pneumatic control devices and parts and methods
A manifold adapted to detachably carry on one side thereof a plurality of pneumatically and electrically operated control units each of which is adapted to be fluidly and electrically interconnected to pneumatic structure and electrical structure of the m...
06/20/1978
4039005Flow diversion means
Flow diversion means are provided particularly for selectively discharging fluids emanating from different sources. The flow diversion means may be installed, in one application, in an uncovered wash down area, used for example for cleaning vehicles or th...
08/02/1977
4037617Multiway pneumatic valve and its application to brake
Multiway pneumatic valve comprising supply inlet and a plurality of separate outlets connected to the inlet by separate circuits. Third and fourth circuits are respectively in series with first and second circuits. Calibrated diaphragms are exposed at their pe...
07/26/1977
4037625Sliding tube fluidic controller
A controller, wherein the throttling range may be changed without affecting the calibration point, comprises a restrictive passage between an outer tube and an inner tube, the outer tube having one end connected to a source of pressure and the other end c...
07/26/1977
3996964Control apparatus particularly for a plurality of compressor bleed valves of a gas turbine engine
Control apparatus for programmed control of a plurality of gas turbine engine compressor air bleed valves in response to a plurality of control input signals representing engine operating conditions including variable conditions related to engine power ou...
12/14/1976
3971399Arrangements for preventing or minimizing over-pressures in gas pipes
This invention relates to arrangements for the prevention or minimization of over-pressures due to sudden interruptions in the flow of a compressible fluid which are caused by an obturator such as an electrical valve along a main gas pipe and more particu...
07/27/1976
3945400Reverse-air manifold and flow passage module
A duct system wherein a main gas manifold services spaced-apart rows of bag houses and wherein a reverse-air manifold and valved passage assembly is interposed between and is connected to the main gas manifold and the bag houses. The assembly is made up o...
03/23/1976
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