US4097185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating device
Assignee: Tecumseh Products Co
•
Filing: 1976-09-13
•
Granted: 1978-06-27
•
Expires: 1996-09-13
Abstract
Abstract A lubricating device, especially for use with a hermetic motor compressor unit, having a vertical shaft extending downwardly into a lubricant sump, and in the lower end of which shaft is a device having an inlet in the lower end and operable as the shaft rotates for propelling the lubricant upwardly along a hollow passage in the shaft and into a channel formed in the outside of the shaft and disposed within the axial limits of the bearing which supports the shaft.
Inventors
- 👤 Rudolf H. Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:15
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/02; F04B39/0223; F04B39/023; F04B39/0238; F04B39/0246; F16; F16N; F16N7/00; F16N7/36; F16N7/366; Y; Y10; Y10S; Y10S417/00; Y10S417/902
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
117 words
A pick-up tube, especially for use for supplying lubricant to lubricant passage means in a hermetic device which includes a fluid sump and a vertically disposed rotary shaft above the fluid level in the sump, said tube comprising: a larger diameter upper cylindrical portion open at the upper end and adapted for being fitted into a central bore in the shaft, said tube having a smaller diameter lower cylindrical portion adapted to be immersed in fluid in the sump and a tapering axial region connecting the upper and lower cylindrical portions, an inlet port extending axially into the lower end of said lower cylindrical portion, and an impeller blade disposed substantially diametrially inside said lower cylindrical portion.
Claim 2
Dependent Claim
117 words
A pick-up tube, especially for use for supplying lubricant to lubricant passage means in a hermetic device which includes a fluid sump and a vertically disposed rotary shaft above the fluid level in the sump, said tube comprising: a larger diameter upper cylindrical portion open at the upper end and adapted for being fitted into a central bore in the shaft, said tube having a smaller diameter lower cylindrical portion adapted to be immersed in fluid in the sump and a tapering axial region connecting the upper and lower cylindrical portions, an inlet port extending axially into the lower end of said lower cylindrical portion, and an impeller blade disposed substantially diametrially inside said lower cylindrical portion.
Claim 3
Dependent Claim
35 words
A pick-up tube according to claim 1 in which said blade extends from near said inlet port to the axial region of said tube near the juncture of said lower cylindrical portion and said region.
References Cited (Backward Citations)
US2419905A
Cited
US2835437A
Cited
US3187994A
Cited
DE1403974A1
Cited
US3285504A
Cited
US3410478A
Cited
US3451615A
Cited
US3664461A
Cited
US3738773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |