Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Vane or deflector
Reexamination Certificate
2000-08-18
2001-10-30
Look, Edward K. (Department: 3745)
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Vane or deflector
C415S211200, C415S224500
Reexamination Certificate
active
06309180
ABSTRACT:
TECHNICAL FIELD
The invention herein resides in the art of dynamo-electric machines such as motors and generators. More particularly, the invention relates to through-flow motor assemblies such as are used in canister applications, wherein working air is used for motor cooling. Specifically, the invention relates to molded motor housings and diffuser systems for such through flow motors.
BACKGROUND ART
Heretofore, it has been known to use electric motors for numerous applications. It has been found that such motors are particularly suited to small blowers, fans, or compressors such as are used in canister applications.
It has previously been known to use so called through-flow configurations which allow all or a portion of the working air from the primary fan to be directed through the motor housing to cool the motor, thus eliminating the need for a separate cooling fan. Such configurations are desirable for size and economy as well as efficiency. The problem with such systems is in lost efficiency due to transition of air moving from the rotating fan as it is directed through the motor housing.
Another problem in previous through-flow motor designs has arisen due to the skeletal frame designs typically used in such systems. These frames are frequently metal and accordingly require additional materials for brush mechanisms and terminations. The additional parts in skeletal frame construction allow for misalignment and improper fit between the commutator and brushes as well as between the field and armature rotor. Accordingly, it is most desirable to obtain a motor housing for a through-flow motor which is lightweight, compact and relatively inexpensive to manufacture, as well as being more efficient.
DISCLOSURE OF INVENTION
In light of the foregoing, it is an aspect of the invention to provide a molded through-flow motor assembly.
Another aspect of the invention is the provision of a through-flow motor assembly having a molded motor housing.
A further aspect of the invention is the provision of a diffuser plate which, in combination with the molded motor housing, provides an efficient transition of air through the motor.
An additional aspect of the invention is the provision of a motor housing having guides for alignment of the motor field, brushes, and armature.
Still another aspect of the invention is the provision of a through-flow motor assembly which requires fewer parts than comparable motors of the prior art, is inexpensive to manufacture, and can be implemented with existing techniques and equipment.
The foregoing and other aspects of the invention which will become apparent as the detailed description proceeds are achieved by the improvement in a molded through-flow motor assembly having a rotating fan member mounted on a motor shaft, the fan being enclosed in a shroud cover, the improvement comprising: housing means for maintaining the motor field in a fixed position; and, diffuser means affixed to said housing means for directing the flow of air from the fan member over the motor.
Other aspects of the invention are attained by a through-flow motor housing and diffuser assembly, comprising: a motor housing having a generally cylindrical cup portion, said cup portion having a circumferential sidewall and a substantially open end, field retaining means disposed within said cup portion, and a circumferential flange portion extending from said cup portion around said open end, said flange portion having a plurality of vanes extending therefrom; and, a diffuser plate, adapted to engage said flange portion, said diffuser plate having first and second sides, a plurality of scalloped ramp surfaces on said first side, a plurality of air inlet apertures penetrating from said first side to said second side, a shaft aperture also penetrating from said first side to said second side, and a plurality of curvilinear vanes radiating from said shaft aperture toward said air inlet apertures on said second side.
Still other aspects of the invention are attained by a molded through-flow motor assembly, comprising: a motor having a field section and an armature section, said armature section having a shaft portion; a rotating fan member mounted on said shaft portion; a motor housing having a generally cylindrical cup portion, said cup portion having a circumferential sidewall and a substantially open end, field retaining means disposed within said cup portion, and a circumferential flange portion extending from said cup portion around said open end, said flange portion having a plurality of vanes extending therefrom, said field retaining means comprising at least two field retaining walls extending inwardly from said circumferential wall, said field retaining wall having an abutment surface; a diffuser plate adapted to engage said flange portion, said diffuser plate having first and second sides, a plurality of scalloped ramp surfaces on said first side, a plurality of air inlet apertures penetrating from said first side to said second side, a shaft aperture also penetrating from said first side to said second side, and a plurality of curvilinear vanes radiating from said shaft aperture toward said air inlet aperture on said second side so that adjacent curvilinear vanes form an expanding air chamber therebetween from said air inlet apertures toward the center of said plate and said vanes of said flange portion include a plurality of ramp surfaces adapted matingly to engage said ramp surfaces of said diffuser plate so as to form a continuous ramp surface within each of said air chambers; and a fan shroud having a circumferential sidewall, an open end, and a generally closed end, said closed end having an air intake aperture therein.
REFERENCES:
patent: 1524899 (1925-02-01), Wise et al.
patent: 2023259 (1935-12-01), Anderson
patent: 2247890 (1941-07-01), Reardon
patent: 2286993 (1942-06-01), Naul
patent: 2822122 (1958-02-01), Cole
patent: 2875947 (1959-03-01), Bradley
patent: 3243102 (1966-03-01), McMahan
patent: 3592566 (1971-07-01), Beardslee
patent: 3749956 (1973-07-01), Riess
patent: 4057370 (1977-11-01), Numata et al.
patent: 4128778 (1978-12-01), Merkle et al.
patent: 4552518 (1985-11-01), Utter
patent: 4669952 (1987-06-01), Forsyth, III et al.
patent: 4679990 (1987-07-01), Yamaura et al.
patent: 4767285 (1988-08-01), Jyoraku et al.
patent: 4908538 (1990-03-01), Geberth, Jr.
patent: 5296769 (1994-03-01), Havens et al.
patent: 5454690 (1995-10-01), Wolfe et al.
patent: 5714819 (1998-02-01), Gilliland et al.
patent: 3802890 A1 (1989-08-01), None
patent: 0 023 609 A1 (1980-07-01), None
patent: 0 552 978 A2 (1993-01-01), None
patent: 57-108499 (1982-07-01), None
patent: 60-153498 (1985-08-01), None
patent: 62-166747 (1987-07-01), None
patent: 63-109300 (1988-05-01), None
patent: 03-105099 (1991-05-01), None
patent: 3138492 (1991-06-01), None
patent: 6123297 (1994-05-01), None
Ciccarelli Robert A.
Coles Michael
Gilliland Michael L.
Ametek Inc.
Look Edward K.
Nguyen Ninh
Renner Kenner Greive Bobak Taylor & Weber
LandOfFree
Molded through-flow motor assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Molded through-flow motor assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molded through-flow motor assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2584248