US4957072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced radial engine
Assignee: Individual
•
Filing: 1989-05-15
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Granted: 1990-09-18
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Expires: 2009-05-15
Abstract
Abstract A low cost multi cylinder radial aircraft engine is composed of an even number of individually functional, single cylinder slider crank model engines. They are mounted to a plate to form equally spaced radially oriented cylinders. In the preferred embodiment, use of standard, low cost, & mass produced two cycles engines are used. This in conjunction with a novel exhaust muffler and throttle mechanism results in a low cost radial engine. The individual engine shafts surround and are parallel to a central output shaft. Pinion gears on each shaft transfer power to a larger sun gear on the output shaft. This gearing synchronizes opposed pistons to reach top dead center at the same time resulting in vibration free piston motion and perfect balance of the entire engine. Said gearing also provides speed reduction for use of large diameter scale propellers. A rear mounted throttle mechanism controls individual carburetor throttles. Each cylinder radially exhausts into a donut shaped exhaust manifold that also serves as a muffler at the front of the engine. It very effectively lowers cylinder exhaust noise by using opposed flow impingement. The muffler also utilizes turbulent gas cooling to greatly reduce exhaust gas temperature and energy. This results in very low noise like its 4 cycle competitor.
Inventors
- 👤 Michael P. Goldowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:58
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/34; F02B75/16; F02B75/18; F02B75/22; F02B75/222; F02B75/02; F02B2075/022; F02B2075/025; F02B2075/027; F02B2075/1804; F02B2075/1824; F02B73/00; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; Y; Y10; Y10S; Y10S123/00; Y10S123/01; Y10S123/03; Y10S123/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
142 words
A gravity flow fuel delivery sytem for multi-carburetor engines that provides a single fuel mixture adjustment for all carburetors and compensates for fuel head elevation differences between carburetors, incorporating a plurality of fuel tank means with relative elevation differences corresponding to the elevation differences of the respective carburetors to be pressure head compensated, said individual fuel tank means each having outlet conduits that introduce fuel to an individually isolated inlet port of a single hydraulic valve, said valve posessing a single adjustment means and at least one isolated outlet port means matched to a respective one of said inlet ports for each fuel tank means, said valve producing equal and adjustable flow resistances due to movement of said single adjustment means between all the respective inlet and outlet port means in the valve thereby producing equal flow rates from each tank means.
Claim 2
Dependent Claim
142 words
A gravity flow fuel delivery sytem for multi-carburetor engines that provides a single fuel mixture adjustment for all carburetors and compensates for fuel head elevation differences between carburetors, incorporating a plurality of fuel tank means with relative elevation differences corresponding to the elevation differences of the respective carburetors to be pressure head compensated, said individual fuel tank means each having outlet conduits that introduce fuel to an individually isolated inlet port of a single hydraulic valve, said valve posessing a single adjustment means and at least one isolated outlet port means matched to a respective one of said inlet ports for each fuel tank means, said valve producing equal and adjustable flow resistances due to movement of said single adjustment means between all the respective inlet and outlet port means in the valve thereby producing equal flow rates from each tank means.
Claim 3
Dependent Claim
63 words
A gravity flow fuel delivery system according to claim 1, wherein said single adjustment means is a single spool with circumferential grooves cut into the spool at the same pitch spacing as that of the inlet and outlet ports that are located in the valve body, whereby axial displacement of the spool changes the flow cross sectional areas of the respective ports equally.
Claim 4
Dependent Claim
35 words
A gravity flow fuel delivery system according to claim 2 wherein said spool is cylindrical and has threads that produce longitudinal motion of the spool relative to the valve body by rotation of the spool.
Claim 5
Dependent Claim
145 words
The invention according to claim 1 used as a fuel delivery system for an internal combustion radial engine composed of an even number of identical and fully functional single cylinder slider crank 2-cycle or 4-cycle engines, each engine comprising a piston, linkage means, carburetor means, and shaft, said engines being positioned in pairs in a common plane, said pistons are in line and diametrally opposed, said engine shafts are parallel to one another and to a central output shaft, said output shaft projects toward the front of the radial engine and said engine shafts project toward the back of the radial engine opposite in direction to said output shaft, and having synchronizing means positioned on said engine shafts for coupling said engine shafts to the output shaft whereby diametrally opposite pistons radially move in phase synchronism thereby cancelling all piston and linkage means inertial forces.
Claim 6
Dependent Claim
175 words
The invention according to claim 1 used as a fuel delivery sytsem for an internal combustion radial engine composed of an even number of identical and fully functional single cylinder slider crank 2 cycle or 4 cycle engines, each engine comprising a piston, linkage means, carburetor means, and shaft, said engines being positioned in pairs in a common plane, said pistons are in line and diametrally opposed, said engine shafts are parallel to one another and to a central output shaft, said output shaft projects toward the front of the radial engine and said engine shafts project toward the back of the radial engine opposite in direction to said output shaft, and having gears attached on said engine shafts for coupling said engine shafts to the output shaft, throttle means to synchronize the throttle of each engine, and muffler means consisting of a generally donut shaped exhaust manifold surrounding said output shaft at the front of said radial engine with passage means for the exhaust gas of said engines to be injected into the manifold.
Claim 7
Dependent Claim
63 words
The invention according to claim 5, wherein said engines are fastened to a first plate and each shaft of said engines is supported by a bearing located in a second plate, said second plate being supported by a plurality of spacer means to said first plate to provide an open structure, and both plates incorporating a central bearing to support said output shaft.
Claim 8
Dependent Claim
49 words
The invention according to claim 5, wherein said throttle means comprises a rotating member with bearing support means wherein said rotating member surrounds the output shaft, said rotating member having pivotally attached links coupled to each engine carburetor throttle to transmit equal motion and to provide synchronization of carburetors.
Claim 9
Dependent Claim
49 words
The invention according to claim 6, wherein said throttle means comprises a rotating member with bearing support means wherein said rotating member surrounds the output shaft, said rotating member having pivotally attached links coupled to each engine carburetor throttle to transmit equal motion and to provide synchronization of carburetors.
Claim 10
Dependent Claim
28 words
The invention according to claim 4 wherein said synchronizing means is provided by a single timing belt that connects said engine shafts in series with said output shaft.
Claim 11
Dependent Claim
64 words
The invention according to claim 5, wherein said single adjustment means is a single spool with circumferential grooves cut into the spool at the same pitch spacing as that of the inlet and outlet ports that are located in the valve body, said spool having cylindrical threads that produce longitudinal movement of the spool relative to the valve body by rotation of the spool.
Claim 12
Dependent Claim
14 words
The invention according to claim 7 wherein the rotating member is a round disc.
Claim 13
Dependent Claim
26 words
The invention according to claim 11, wherein said links have at least one end formed in a z shape to mate with holes in said disc.
Claim 14
Dependent Claim
25 words
The gravity flow fuel delivery system according to claim 1 wherein said fuel tank means are equally pressurized above atmospheric pressure using a pressure means.
Claim 15
Dependent Claim
22 words
The radial engine according to claim 5 wherein said individual fuel tank means are each pressurized using pressure from the muffler means.
Claim 16
Dependent Claim
68 words
The gravity flow fuel delivery system according to claim 13 wherein said single adjustment means is a single spool with circumferential grooves cut into the spool at the same pitch spacing as that of the inlet and outlet ports that are located in the valve body, said spool having cylindrical threads that produce longitudinal movement of the spool relative to the valve body by rotation of the spool.
Claim 17
Dependent Claim
172 words
A fuel control valve for multicarburetor engines that provides a single adjustment for apportioning equal rates of flow to all carburetors from a pressurized tank means, said tank means having an outlet conduit that introduces fuel to at least one isolated inlet port formed in said control valve, wherein said valve has a single spool with at least one circumferential groove, equal in number to that of said isolated inlet ports, cut into the spool at the same spacing as that of said at least one isolated inlet port, outlet ports formed in the valve body, each said outlet port serving a respective one of said carburetors, said at least one inlet port lying in a common plane with at least one of said outlet ports and communicating with such through said respective circumferential groove, said spool having cylindrical threads that produce longitudinal movement of the spool relative to the valve body by rotation of the spool, thereby creating variable and equal cross sectional flow areas between said inlet and outlet ports.
Claim 18
Dependent Claim
172 words
A fuel control valve for multicarburetor engines that provides a single adjustment for apportioning equal rates of flow to all carburetors from a pressurized tank means, said tank means having an outlet conduit that introduces fuel to at least one isolated inlet port formed in said control valve, wherein said valve has a single spool with at least one circumferential groove, equal in number to that of said isolated inlet ports, cut into the spool at the same spacing as that of said at least one isolated inlet port, outlet ports formed in the valve body, each said outlet port serving a respective one of said carburetors, said at least one inlet port lying in a common plane with at least one of said outlet ports and communicating with such through said respective circumferential groove, said spool having cylindrical threads that produce longitudinal movement of the spool relative to the valve body by rotation of the spool, thereby creating variable and equal cross sectional flow areas between said inlet and outlet ports.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |