Today In History
Six-year-old Robert W. Patch granted a patent for a "toy truck".
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5248246 | Orbiting ball meter-motor-pump A positive displacement fluid handling apparatus comprises a body including a closed loop tunnel with a circular cross section, laid out in an oblong geometry with two substantially semicircular sections of the tunnel respectively disposed at the two extr... | 09/28/1993 |
| 4574644 | Ball bearing flow meter and pump This invention relates to a positive displacement flow meter or pump comprising a plurality of spherical balls orbitably entrained in a toroidal cavity. The first segment of the toroidal cavity tangentially connecting a fluid inlet to a fluid outlet compr... | 03/11/1986 |
| 4343191 | Fluid flow meter This invention is a fluid flow meter with pulse output proportional to the fluid flow rate. The pulse is tranduced by means of a pick-off sensor from the by-passing of a ball which travels in a toroidal passageway at speed close to that of the velocity of... | 08/10/1982 |
| 4331036 | Fluid flowmeter A follower element flowmeter which includes a hollow enclosed toroidal path around which a follower element travels in response to a flowing fluid. A pair of sensors are located adjacent to the fluid inlet and outlet to sense the passage of the follower e... | 05/25/1982 |
| 4265145 | Ring-piston meter with a planetary-gear differential A ring-piston meter comprising a planetary-gear differential adapted to be responsive to a driving pin arranged eccentrically to the axis of a ring piston. The planetary-gear differential comprises a stationary ring gear and a further gear adapted to be c... | 05/05/1981 |
| 4215573 | Fluid metering device A fluid metering device comprising an annular conductor defining a passage of predetermined uniform cross section and supports supporting the conductor horizontally, said conductor containing an inlet port at the top side through which the fluid to be met... | 08/05/1980 |
| 4203323 | Flowmetering method and device In a flowmeter system in which a fluid stream causes a ball to circulate in a guide track at a speed proportional to the volume flow rate of the stream, a signal is produced each time the ball passes a sensing point. The speed of the ball is continually m... | 05/20/1980 |
| 4157660 | Digital flowmeter A bearingless digital flowmeter consists of toroid-shaped cavity and of tangential inlet/outlet channels. A ball in the cavity revolves in proportion to the flow rate. The frequency of revolution of the ball is detected by photoelectric or magnetic pickup... | 06/12/1979 |
| 4089220 | Fluid flow meter A flow meter including a housing with a coaxial inlet and outlet is disclosed. The housing of the flow meter defines an inner chamber including a pair of vane assemblies surrounding the inlet and outlet. A track is defined between the vane assembly and th... | 05/16/1978 |
