US3754535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion engine with rotary piston arrangement
Assignee: Volkswagen AG
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Filing: 1971-10-06
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Granted: 1973-08-28
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Expires: 1991-10-06
Abstract
Abstract In a combustion engine having a rotary-type piston mounted for rotation and having a cross sectional area defining a trochoid, an outer housing receiving the piston and being in meshing engagement therewith, the housing having an inner surface which has a cross sectional shape representing the envelope of a trochoid curve and forms a plurality of housing arches which include the combustion chambers in the form of recesses, each chamber being arranged to fall in the half of a housing arch which is first swept by the piston during the relative movement between the housing and the piston.
Inventors
- 👤 P Hofbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:11
CPC Classifications
F; F02; F02B; F02B53/00; F02B2053/005; F02B2730/00; F02B2730/01; F02B2730/018; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
106 words
In a combustion engine, a rotary-type piston mounted for rotation therein, said piston having a cross-sectional area defining a trochoid, an outer housing receiving said piston means and being in meshing engagement with said piston means, said housing having an inner surface having a cross sectional shape representing the envelope of a trochoid and forms a plurality of housing arches, each of said housing arches comprising a combustion chamber in the form of recess, said combUstion chamber being arranged in the half of the respective housing arch which is first swept by said piston means during the relative movement between said housing and said piston means.
Claim 2
Dependent Claim
106 words
In a combustion engine, a rotary-type piston mounted for rotation therein, said piston having a cross-sectional area defining a trochoid, an outer housing receiving said piston means and being in meshing engagement with said piston means, said housing having an inner surface having a cross sectional shape representing the envelope of a trochoid and forms a plurality of housing arches, each of said housing arches comprising a combustion chamber in the form of recess, said combUstion chamber being arranged in the half of the respective housing arch which is first swept by said piston means during the relative movement between said housing and said piston means.
Claim 3
Dependent Claim
41 words
The combination as claimed in claim 1, wherein said combustion chamber is in the shape of a cylinder having an axis lying parallel to the axis about which said piston means rotates, said piston means being rotated about an excenter shaft.
Claim 4
Dependent Claim
32 words
The combination as claimed in claim 1, wherein each of said combustion chambers has a first transition part with said housing arch, said first transition part being formed with a small radius.
Claim 5
Dependent Claim
24 words
The combination as claimed in claim 2, wherein said combustion chamber comprises a sparkplug means arranged approximately in the axis of said combustion chamber.
Claim 6
Dependent Claim
46 words
The combination as claimed in claim 1, wherein said combustion chamber is subdivided into an ante-chamber and into a main combustion chamber, said main combustion chamber opening into an operating space of the engine, said main combustion chamber of the engine being defined by said housing.
Claim 7
Dependent Claim
19 words
The combination as claimed in claim 5, wherein said ante-chamber communicates with said main operating space of the engine.
Claim 8
Dependent Claim
63 words
The combination as claimed in claim 5, wherein said sparkplug means being provided in said ante chamber and a fuel inlet means providing for a layering of the fuel within said combustion chamber, whereby a portion of said injected fuel is directed to the sparkplug in said ante chamber and the main portion of said fuel is directed into said main combustion chamber.
Claim 9
Dependent Claim
110 words
In a motor vehicle, a combustion engine having a rotary-type piston mounted for rotation therein, said piston having a cross-sectional area defining a trochoid, an outer housing receiving said piston means and being in meshing engagement with said piston means, said housing having an inner surface having a cross sectional shape representing the envelope of a trochoid and forms a plurality of housing arches, each of said housing arches comprising a combustion chamber in the form of recess, said combustion chamber being arranged in the half of a respective housing arch which is first swept by said piston means during the relative movement between said housing and said piston means.
Claim 10
Dependent Claim
110 words
In a motor vehicle, a combustion engine having a rotary-type piston mounted for rotation therein, said piston having a cross-sectional area defining a trochoid, an outer housing receiving said piston means and being in meshing engagement with said piston means, said housing having an inner surface having a cross sectional shape representing the envelope of a trochoid and forms a plurality of housing arches, each of said housing arches comprising a combustion chamber in the form of recess, said combustion chamber being arranged in the half of a respective housing arch which is first swept by said piston means during the relative movement between said housing and said piston means.
Claim 11
Dependent Claim
41 words
The combination as claimed in claim 8, wherein said combustion chamber is in the shape of a cylinder having an axis lying parallel to the axis about which said piston means rotates, said piston means being rotated about an excenter shaft.
Claim 12
Dependent Claim
32 words
The combination as claimed in claim 8, wherein each of said combustion chambers has a first transition part with said housing arch, said first transition part being formed with a small radius.
Claim 13
Dependent Claim
24 words
The combination as claimed in claim 9, wherein said combustion chamber comprises a sparkplug means arranged approximately in the axis of said combustion chamber.
Claim 14
Dependent Claim
47 words
The combination as claimed in claim 8, wherein said combustion chamber is subdivided into an ante-chamber and into a main combustion chamber, said main combustion chamber opening into an operating space of the engine, said main combustion chamber of the engine being defined by said housing arch.
Claim 15
Dependent Claim
19 words
The combination as claimed in claim 12, wherein said ante-chamber communicates with said main operating space of the engine.
Claim 16
Dependent Claim
63 words
The combination as claimed in claim 12, wherein said sparkplug means being provided in said ante chamber and a fuel inlet means providing for a layering of the fuel within said combustion chamber, whereby a portion of said injected fuel is directed to the sparkplug in said ante chamber and the main portion of said fuel is directed into said main combustion chamber.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |