US3584607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber for a rotary piston type internal combustion engine
Assignee: Mazda Motor Corp
•
Filing: 1969-06-02
•
Granted: 1971-06-15
•
Expires: 1989-06-02
Abstract
Abstract In a rotary piston internal combustion engine having a casing formed by a central housing having an epitrochoidal inner surface and side housings sealingly disposed at both sides thereof, a rotary piston with a substantially triangular profile and rotatable in a planetary motion is disposed within the casing and has a combustion chamber formed by its peripheral surface thereof as recesses starting from each apex portion and gradually increasing in depth in its rotating direction and broadest at the apex portion and gradually decreasing its width and ending intermediate the apex portions.
Inventors
- 👤 Kenichi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:35
CPC Classifications
F; F02; F02B; F02B53/00; F01; F01C; F01C1/00; F01C1/22; F01C21/00; F01C21/08; F02B2053/005; F02B2730/00; F02B2730/01; F02B2730/018; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
In a rotary piston internal combustion engine including a casing composed of a central housing with an epitrochoidal inner surface and side housings sealingly disposed at both sides thereof, and a rotary piston with a substantially triangular profile supported on an eccentric shaft for movement in planetary motion within the casing; the improvement coMprising at least one combustion chamber formed as a recess on the peripheral surface of the rotary piston, each recess increasing gradually in depth starting from the apex portion of the rotary piston and extending toward its rotating direction, and being broadest at its apex, essentially the full width of said rotary piston and gradually decreasing in width in its rotating direction.
Claim 2
Dependent Claim
115 words
In a rotary piston internal combustion engine including a casing composed of a central housing with an epitrochoidal inner surface and side housings sealingly disposed at both sides thereof, and a rotary piston with a substantially triangular profile supported on an eccentric shaft for movement in planetary motion within the casing; the improvement coMprising at least one combustion chamber formed as a recess on the peripheral surface of the rotary piston, each recess increasing gradually in depth starting from the apex portion of the rotary piston and extending toward its rotating direction, and being broadest at its apex, essentially the full width of said rotary piston and gradually decreasing in width in its rotating direction.
Claim 3
Dependent Claim
114 words
A combustion chamber for a rotary piston for use in a rotary piston internal combustion engine including a casing composed of a central housing with an epitrochoidal inner surface and side housings sealingly disposed at both sides thereof, and wherein said rotary piston has a substantially triangular profile and is supported on an eccentric shaft for movement in planetary motion within the casing; said combustion chamber being formed on the peripheral surface of the rotary piston and increasing gradually in depth starting from the apex portion of the rotary piston and extending in its rotating direction and being broadest at the apex portion and gradually decreasing in width and ending intermediate the apex portions.
Claim 4
Dependent Claim
114 words
A combustion chamber for a rotary piston for use in a rotary piston internal combustion engine including a casing composed of a central housing with an epitrochoidal inner surface and side housings sealingly disposed at both sides thereof, and wherein said rotary piston has a substantially triangular profile and is supported on an eccentric shaft for movement in planetary motion within the casing; said combustion chamber being formed on the peripheral surface of the rotary piston and increasing gradually in depth starting from the apex portion of the rotary piston and extending in its rotating direction and being broadest at the apex portion and gradually decreasing in width and ending intermediate the apex portions.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |