Patent US4255098A successfully refreshed from Google Patents.
US4255098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary vane pump assembly
Assignee: Oerlikon Barmag AG
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Filing: 1978-03-22
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Granted: 1981-03-10
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Expires: 1998-03-22
Abstract
Abstract An improved rotary vane machine assembly of the type utilized for producing vacuum in motor vehicle power brake assistance units wherein a compensating coupling connects the pump drive shaft with the drive motor of the pump and a lubricant is supplied to the working elements of the pump from said drive motor, the improvement comprising a pot-shaped hood which receives the working components of the pump and, in particular, the rotor and vanes, and a mounting flange having a bell-shaped foot portion surrounding the compensating coupling and a lid portion covering the open end of the pot-shaped hood. A compensating disc which limits the operating chamber of the working components in an axial direction is also disclosed, the compensating disc being pressed against the face of the vanes by means of a cushion of lubricant and/or a compression spring.
Inventors
- 👤 Siegfried Hertell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:40
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/02; F; F04; F04C; F04C29/00; F04C29/0042; F04C29/005; F04C29/02; F04C29/023
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
239 words
In a rotary vane pump and in particular the type used for producing vacuum in motor vehicle power brake assistance units wherein a compensating coupling connects a relatively horizontally located pump drive shaft with the drive motor of the pump and a lubricant oil is supplied to the working elements of the pump from said drive motor, the improvement comprising: a pot-shaped hood which has a closed end wall sealing off the free end of the drive shaft and which receives and circumferentially surrounds the working components of the pump and, in particular, the rotor and vanes; and a mounting flange having a bell-shaped foot portion which is totally enclosed on its circumference surrounding the compensating coupling and a lid portion covering the open end of said pot-shaped hood, said bell-shaped foot portion being formed as an oil collector for the lubricant oil flowing out from said working components and having a suction pipe connection arranged relatively vertically in a cross-sectional plane thereof and then turning in a direction axially parallel to the pump drive shaft to open, after crossing the lid portion which is located between said pot-shaped hood and said bell-shaped foot portion, above said pump drive shaft in the suction chamber of the pump, and said lid portion having an outlet opening for discharging the lubricant oil and air from the working components of the pump, said outlet opening being located below said pump drive shaft.
Claim 2
Dependent Claim
239 words
In a rotary vane pump and in particular the type used for producing vacuum in motor vehicle power brake assistance units wherein a compensating coupling connects a relatively horizontally located pump drive shaft with the drive motor of the pump and a lubricant oil is supplied to the working elements of the pump from said drive motor, the improvement comprising: a pot-shaped hood which has a closed end wall sealing off the free end of the drive shaft and which receives and circumferentially surrounds the working components of the pump and, in particular, the rotor and vanes; and a mounting flange having a bell-shaped foot portion which is totally enclosed on its circumference surrounding the compensating coupling and a lid portion covering the open end of said pot-shaped hood, said bell-shaped foot portion being formed as an oil collector for the lubricant oil flowing out from said working components and having a suction pipe connection arranged relatively vertically in a cross-sectional plane thereof and then turning in a direction axially parallel to the pump drive shaft to open, after crossing the lid portion which is located between said pot-shaped hood and said bell-shaped foot portion, above said pump drive shaft in the suction chamber of the pump, and said lid portion having an outlet opening for discharging the lubricant oil and air from the working components of the pump, said outlet opening being located below said pump drive shaft.
Claim 3
Dependent Claim
28 words
The rotary vane pump of claim 1 wherein the lid portion of said mounting flange has a sliding bearing formed therein in which the pump drive shaft rotates.
Claim 4
Dependent Claim
64 words
The rotary vane pump of claim 1 wherein a recess is formed in the lid portion of said mounting flange or the open end portion of said pot-shaped hood which connects the bearings within which said pump drive shaft rotates with the chambers created between the base of the rotary vanes and the slits formed in said rotor in which said vanes radially slide.
Claim 5
Dependent Claim
18 words
The rotary vane pump of claim 1 wherein said bell-shaped foot portion is made of a light-weight metal.
Claim 6
Dependent Claim
29 words
The rotary vane pump of claim 1 wherein said opening of the axially extending portion of the pipe connection is formed in a circumferential direction as a reniform-shaped recess.
Claim 7
Dependent Claim
54 words
The rotary vane pump of claim 1 wherein the foot portion of said mounting flange has an outwardly directed flange for fixing said mounting flange on said drive motor formed on one end thereof and said lid portion has a second flange portion formed thereon for joining said pot-shaped hood to said lid portion.
Claim 8
Dependent Claim
24 words
The rotary vane pump of claim 6, wherein said second flange portion points radially inward and seals said pot-shaped hood to said lid portion.
Claim 9
Dependent Claim
32 words
The rotary vane pump of claim 7 wherein said pot-shaped hood has at its open end fixing means for connecting said hood to the radially inward pointing portion of said second flange.
Claim 10
Dependent Claim
28 words
The rotary vane pump of claim 8 wherein said fixing means comprises screw-threaded passages extending to the open end of said pot-shaped hood which are formed as pockets.
Claim 11
Dependent Claim
36 words
The rotary vane pump of claim 1 wherein said outlet opening is formed in the lid portion of said mounting flange facing said working components as a passage extending axially parallel to the pump drive shaft.
Claim 12
Dependent Claim
22 words
The rotary vane pump of claim 10 wherein said axial outlet opening connects with the oil-collecting foot portion of said mounting flange.
Claim 13
Dependent Claim
26 words
The rotary vane pump of claim 11 wherein said axial outlet opening facing said working components is formed in a circumferential direction as a reniform-shaped recess.
Claim 14
Dependent Claim
50 words
The rotary vane pump of claim 1 wherein an annular groove is formed in the lid portion of said mounting flange which at least partially intersects with the chambers created between the base of the rotary vanes and the slits formed in said rotor in which said vanes radially slide.
Claim 15
Dependent Claim
43 words
The rotary vane pump of claim 13 wherein an annular groove is formed in the inner face of said pot-shaped hood facing said working components, the diameter of said annular groove being smaller than the base diameter of said rotary vane base chambers.
Claim 16
Dependent Claim
45 words
The rotary vane pump of claim 1 further comprising a compensating disc limiting operating chamber of said working components in an axial direction, said compensating disc being pressed against the face of said vanes by means of a cushion of lubricant or a compression spring.
Claim 17
Dependent Claim
28 words
The rotary vane pump of claim 15 wherein said compensating disc has a passage formed therein which is designed as a sliding bearing for the pump drive shaft.
References Cited (Backward Citations)
US1520248A
Cited
US2148070A
Cited
US2633292A
Cited
US2902012A
Cited
US3865515A
Cited
US4086040A
Cited
US4091638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |