US3815559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankcase valve structure for a two-cycle engine
Assignee: Brunswick Corp
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Filing: 1972-08-16
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Granted: 1974-06-11
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Expires: 1992-08-16
Abstract
Abstract An induction reed valve includes a valve block with a flat end face having ports. A bulb type reed is secured overlying each port. Each reed has an outer closure portion integrally interconnected to a common mounting strip by an hourglassshaped connecting portion defining a reduced width thickness within its length and thereby reduces the spring constant and the effects of inertia as the reed moves. A stop arm is located outwardly slightly in excess of the normal full position.
Inventors
- 👤 R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:12
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/20; F01L3/205; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
137 words
A crankcase induction valve for a two-cycle engine employing a valve block means adapted to be mounted within an engine crankcase and having an induction passageway means connected to a series of port means in a flat face of the block means, and wherein a series of flexible reeds are secured against the face of the block means and extend circumferentially into a normally seated position over said port means to close the latter, said reeds having an outer closure portion essentially corresponding to the opening of the ports and located in overlying covering relation to said ports and connected to an inner securement portion by a connecting portion, said connecting portion including a reduced width substantially less than the width of said closure portion and said securement portion and located intermediate the closure and securement portions.
Claim 2
Dependent Claim
137 words
A crankcase induction valve for a two-cycle engine employing a valve block means adapted to be mounted within an engine crankcase and having an induction passageway means connected to a series of port means in a flat face of the block means, and wherein a series of flexible reeds are secured against the face of the block means and extend circumferentially into a normally seated position over said port means to close the latter, said reeds having an outer closure portion essentially corresponding to the opening of the ports and located in overlying covering relation to said ports and connected to an inner securement portion by a connecting portion, said connecting portion including a reduced width substantially less than the width of said closure portion and said securement portion and located intermediate the closure and securement portions.
Claim 3
Dependent Claim
62 words
The crankcase valve of claim 1 wherein said plurality of valve reeds are connected in common to an inner mounting strip and formed of a uniform thickness and said outer port closure portions being generally circular disc-like members disposed in circumferentially spaced relation and said connecting portion being generally hourglass shaped with curved edges extending between the closure portion and the strip.
Claim 4
Dependent Claim
42 words
The crankcase valve apparatus of claim 1 wherein said series of flexible reeds are secured to a common mounting strip, each of said connecting portion includes corresponding concave edges defining a minimum width in spaced relation to the closure and mounting portions.
Claim 5
Dependent Claim
57 words
The crankcase valve of claim 1 wherein said plurality of valve reeds are connected in common to an innter annular mounting strip and said outer port closure portions being generally circular disc-like members disposed in circumferentially spaced relation and said connecting portion being generally hourglass shaped with curved edges extending between the closure portion and the strip.
Claim 6
Dependent Claim
38 words
The crankcase valve of claim 1 inclusing stop means secured in overlying relation with each valve reed and spaced outwardly from the valve reed a distance slightly in excess of the normal outward deflection of the corresponding reed.
Claim 7
Dependent Claim
27 words
The crankcase valve of claim 1 including stop means secured in overlying relation with each valve reed and a resilient damping means secured to the stop means.
Claim 8
Dependent Claim
119 words
A crankcase valve reed unit for a valve block adapted to be mounted within an engine crankcase and having an induction passageway means connected to a port opening from the flat face of the block, comprising an integral flat resilient metal member having an outer closure portion essentially corresponding to a port opening and an inner fixed securement portion connected by a connecting portion to define a valve reed, said reed unit being of a generally uniform thickness, said connecting portion including a reduced width between the closure and securement portions and selected to minimize the spring force and move the reed from a deflected position to the planar sealing position without establishing excessive damaging stresses in the reed.
Claim 9
Dependent Claim
119 words
A crankcase valve reed unit for a valve block adapted to be mounted within an engine crankcase and having an induction passageway means connected to a port opening from the flat face of the block, comprising an integral flat resilient metal member having an outer closure portion essentially corresponding to a port opening and an inner fixed securement portion connected by a connecting portion to define a valve reed, said reed unit being of a generally uniform thickness, said connecting portion including a reduced width between the closure and securement portions and selected to minimize the spring force and move the reed from a deflected position to the planar sealing position without establishing excessive damaging stresses in the reed.
Claim 10
Dependent Claim
36 words
The reed unit of claim 7 wherein said outer closure portion is generally circular disc-like member and said connecting portion being generally hourglass shaped with curved edges extending between the closure portion and the securement portion.
Claim 11
Dependent Claim
46 words
The reed unit of claim 8 including a plurality of said reeds equicircumferentially spaced and connected to an annular mounting strip defining said securement portions by corresponding hourglass shaped connecting portions, said curved edges being defined by circular openings between the connecting portion of adjacent reeds.
Claim 12
Dependent Claim
14 words
The reed unit of claim 9 wherein said reed unit is 0.008 inches thick.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |