Title:
RADIAL CYLINDER HYDRAULIC MACHINE WITH IMPROVED OSCILLATING RADIAL CYLINDER
Document Type and Number:
WIPO Patent Application WO/2012/063119
Kind Code:
A3
Abstract:
A radial cylinder hydraulic machine, comprising: oscillating radial cylinders close to the external shell of the crown or star of cylinder-group pistons: the pistons (3) of said groups are made sliding on a crank shaft (1) with throw (2) or eccentric, or on interposed concentric elements and they create alternative movement in the oscillating radial cylinders; characterised in this, presenting said oscillating cylinders (32, 57, 64, 66) in contact with a spherical oscillation surface (35, 65) made or included in the body (10, 33) or shell of the hydraulic machine; each oscillating radial cylinder is fitted with an internal annular surface (36, 68) with a greater curve compared with the radius of the spherical oscillation surface, for coupling with said spherical surface of oscillation to create contact with a circumference of a width due only to elastic yielding of the materials in a median area (61) of the circumference of contact; furthermore, the radius (R2) of circumference of contact is less than half the diameter (D) of the cylinder bore (32, 57, 64, 66); finally, it includes thrust means of the oscillating cylinders against the spherical oscillation surface outside of the cylinders themselves. Furthermore, in a variation of a constructive form in feeding and/or discharge of the hydraulic liquid in the oscillating cylinder that occurs through a side of the cylinder itself.
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Inventors:
PECORARI PIERCELESTINO (IT)
Application Number:
PCT/IB2011/002648
Publication Date:
September 07, 2012
Filing Date:
November 09, 2011
Export Citation:
Assignee:
R & D SRL (IT)
PECORARI PIERCELESTINO (IT)
PECORARI PIERCELESTINO (IT)
International Classes:
F01B1/06; F01B15/00; F04B1/04; F04B1/053
Domestic Patent References:
| WO2003078822A1 | 2003-09-25 |
Foreign References:
| EP0491398A1 | 1992-06-24 | |||
| EP0172076A1 | 1986-02-19 | |||
| US3885459A | 1975-05-27 | |||
| US4963075A | 1990-10-16 | |||
| US3747578A | 1973-07-24 |
Attorney, Agent or Firm:
GASPARINI, Alberto (Via Manicardi 5, I- Carpi, IT)
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