Electrical generator or motor structure – Dynamoelectric – Linear
Reexamination Certificate
1999-11-04
2001-07-17
Ramirez, Nestor (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Linear
C310S015000, C310S024000, C123S090110, C251S129100, C251S129160, C251S129180, C335S274000
Reexamination Certificate
active
06262498
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention concerns an electromagnetic drive.
2. Description of Related Art
A drive having the characteristics of a superordinate concept is, for example, known from the description in EP 0 043 42 6 b1. A problem in such drives, particularly when they are used for the purpose of actuating valves in internal combustion engines is heat discharge from the magnet coils. It is known that this problem can be eliminated by the use of costly water or oil baths. Furthermore, the familiar solutions exhibit unresolved problems such as, for example, closed installation unit with electrical connection and adjustment of the magnetic system to residual air gap.
De 36 16 540 a1 describes an electromagnetic drive for a valve, in which the drive is incorporated into a structural unit. The armature is, in this case, supported by a roller bearing. In addition, this solution requires a torque spring [torsion spring] with a transmission lever external to the structural unit, which is then acted upon by the drive. In this case the result is considerable mass to be moved, which necessarily imposes the requirement of high performance on the drive.
SUMMARY OF THE INVENTION
The purpose of the invention is to provide the solution of mounting the armature as friction-free as possible and to create an easy-to-install assembly.
This solution to the problem is described herein and in the claims.
A unit that can be pre-tested is created by the invention that, with its application as a valve drive for a variety of motor types as standard, can be employed as a modular installation module.
With a further development of the invention, it is cost-effected to incorporate two drives into one structural unit. If, when doing this, the two drive are mounted on a common foundation or base, the problem of heat elimination is satisfactorily solved by imbedding the coils in the foundation or base. A fully testable component can be created, that is connected to the outside by way of a common plug. In the case of the invention the torsion spring can be elongated, because the entire width of the unit can be utilized.
Furthermore, the torsion spring can be pre-mounted using the valve actuation and armature using a carrier plate. Satisfactory adjustment of the magneto system with elimination of all tolerances is possible, particularly in the case where a mechanical stop system is used that firmly holds the armature in the terminal position without electromagnetic excitation. Furthermore, the magnets can be adjusted for residual air gap and fastened using screws or bolts relative to the magnet armature. The subordinate claims describe other design extensions of the invention.
With the various operational temperatures, for example, cold start, warm running, steady-state condition, repeat start the components involved in heat transfer such as the cylinder block, valves and their actuation have different expansions with different behavior over time. They thus have, in turn, an affect on the armature position; that is, residual air gap in the closed valve condition, in which the magneto system is effective. The different residual air gaps mean overhead in adjustment control and higher electrical performance consumption at greater air gaps. With the appropriate selection of materials this change can be kept to a minimum.
Design examples of the invention are elaborated using the drawing.
REFERENCES:
patent: 5005534 (1991-04-01), Washizu et al.
patent: 5005553 (1991-04-01), Washizu et al.
patent: 5048471 (1991-09-01), Takii et al.
patent: 5117213 (1992-05-01), Kreuter et al.
patent: 5131624 (1992-07-01), Kreuter et al.
patent: 5161494 (1992-11-01), Brown, Jr.
patent: 5224683 (1993-07-01), Richeson
patent: 5548263 (1996-08-01), Bulgatz et al.
patent: 5720468 (1998-02-01), Morinigo
patent: 5941201 (1999-08-01), Shimizu et al.
patent: 6 41 845 (1937-02-01), None
patent: 2 038 675 (1970-08-01), None
patent: 2 317 246 (1973-04-01), None
patent: 2 334 211 (1973-07-01), None
patent: 3031354 A1 (1982-04-01), None
patent: 3208348 A1 (1982-12-01), None
patent: 33 13 284 A1 (1984-10-01), None
patent: 3508768 A1 (1985-10-01), None
patent: 36 16 540 (1987-11-01), None
patent: 3802836 A1 (1989-08-01), None
patent: 195 11 880 A1 (1995-10-01), None
patent: 195 34 959 A1 (1996-03-01), None
patent: 195 06 566 A1 (1996-08-01), None
patent: 44 30 324 C1 (1996-10-01), None
patent: 196 28 860 A1 (1998-01-01), None
patent: 1 471 537 (1973-09-01), None
patent: 2 088 137 (1980-11-01), None
patent: WO 97/17561 (1997-05-01), None
Le Dang Dihn
Ramirez Nestor
Woodbridge Richard C.
Woodbridge & Associates P.C.
LandOfFree
Electromagnetic drive mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electromagnetic drive mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic drive mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2443041