US3915026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lobe type pump adjustment
Assignee: Wallace Murray Corp
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Filing: 1974-07-29
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Granted: 1975-10-28
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Expires: 1994-07-29
Abstract
Abstract A gear mounting arrangement for lobe type air pumps. Angular adjustment between a gear (a form of hub) and its (lobe carrying) shaft permits a desired angular phase adjustment between the intermeshing lobes. The gear moves axially on its shaft and is held in place by positive screw or nut on one face and retained on the other face by a belleville spring. Rotation of the nut causes axial displacement of the gear and consequent phase adjustment.
Inventors
- 👤 Albert D Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:13
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/02; F16H1/04; F16H1/06; F16H1/08; F04; F04C; F04C29/00; F04C29/0042; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/1956; Y10T74/19585; Y10T74/1959
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A connection between a shaft and a hub for varying the angular phase relation therebetween, said shaft and hub having at least one interengaging spline, an abutment adjustably positioned along said shaft, said abutment contacting one face of said hub, a biasing spring contacting the other face of said hub, said spring being compressed, whereby a spring force urges the hub against the abutment.
Claim 2
Dependent Claim
64 words
A connection between a shaft and a hub for varying the angular phase relation therebetween, said shaft and hub having at least one interengaging spline, an abutment adjustably positioned along said shaft, said abutment contacting one face of said hub, a biasing spring contacting the other face of said hub, said spring being compressed, whereby a spring force urges the hub against the abutment.
Claim 3
Dependent Claim
36 words
The connection of claim 1 wherein said spline is at an angle to the axis of said shaft, whereby axial adjustment of said abutment along the shaft causes the hub to rotate relative to the shaft.
Claim 4
Dependent Claim
17 words
The connection of claim 2 wherein said abutment is defined by a nut threaded on said shaft.
Claim 5
Dependent Claim
12 words
The connection of claim 2 wherein said spring is a belleville spring.
Claim 6
Dependent Claim
46 words
The connection of claim 4 wherein the largest diameter of said belleville spring contacts one face of the hub, and wherein a collar is axially fixed relative to said shaft, and the smallest diameter of said belleville spring contacts and abuts one end of said collar.
Claim 7
Dependent Claim
54 words
The connection of claim 1 wherein said hub is a gear, and including a second gear secured to a second shaft, said second gear meshing with said firstmentioned gear, said first and second gears having helical teeth, whereby axial movement of the first gear on its shaft rotates the second gear and its shaft.
Claim 8
Dependent Claim
35 words
The connection of claim 6 wherein said first and second shafts each carry a plurality of elongated, meshing lobes, whereby adjustment of the abutment along the first-mentioned shaft causes angular phase adjustment between the lobes.
Claim 9
Dependent Claim
16 words
The connection of claim 1 wherein said hub carries helical gear teeth on its outer periphery.
References Cited (Backward Citations)
US2444773A
Cited
US3605516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |