US3601515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant pump
Assignee: Mack Trucks Inc
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Filing: 1969-07-30
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Granted: 1971-08-24
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Expires: 1989-07-30
Abstract
Abstract A lubricant pump especially suitable for automotive transmissions and the like employing mating gears, at least one of which extends into a sump in a lower casing area. A channeldefining adapter receives the teeth of two mating gears as they converge toward the area of gear engagement. The adapter and that part of its channel receiving the teeth of at least one gear extend below the lubricant level in the sump to substantially close the spaces between adjacent gear teeth, thus defining compartments within which lubricant is transported toward the location at which the gears converge. By virtue of the increased pressure at the convergence of the gear teeth, the transported lubricant is pumped through an outlet passage in the adapter adjacent the area of gear engagement for remote lubrication of other components. One or both of the mating gears may extend into the lubricant of the sump.
Inventors
- 👤 Winton J Pelizzoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:31
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/048; F16H57/0493; F16N; F16N13/00; F16N13/20; F16H57/042; F16H57/0421; F16H57/0423; F16H57/0434; F16H57/0436; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19991
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
A lubricant pump including a casing having a sump for collecting lubricant; a pair of mating rotatable gears, one of which gears has a plurality of teeth adapted for rotation through lubricant in the sump; means defining a channel receiving a number of the teeth of the one gear and extending, in the direction of rotation, from a channel end at a location in the sump below the level of the lubricant in the sump during rotation of the one gear to a location above the lubricant level proximate the engagement of the gears on the converging side thereof; and an outlet passage through the channel-defining means proximate the engagement of the gears for the discharge of lubricant outwardly therethrough.
Claim 2
Dependent Claim
120 words
A lubricant pump including a casing having a sump for collecting lubricant; a pair of mating rotatable gears, one of which gears has a plurality of teeth adapted for rotation through lubricant in the sump; means defining a channel receiving a number of the teeth of the one gear and extending, in the direction of rotation, from a channel end at a location in the sump below the level of the lubricant in the sump during rotation of the one gear to a location above the lubricant level proximate the engagement of the gears on the converging side thereof; and an outlet passage through the channel-defining means proximate the engagement of the gears for the discharge of lubricant outwardly therethrough.
Claim 3
Dependent Claim
67 words
The lubricant pump according to claim 1, wherein the gears engage at a location above the lubricant level, The channel receives teeth on the one gear which are intermediate the lubricant level and the location of gear engagement, and the channel-defining means substantially closes the spaces between received adjacent teeth to restrict loss of lubricant in transit upwardly above the lubricant level toward the gear engagement location.
Claim 4
Dependent Claim
68 words
The lubricant pump according to claim 2, wherein the channel-defining means extends below the lubricant level sufficiently to close successively each space between adjacent teeth below the lubricant level, thereby substantially to entrap lubricant within said space for delivery to the outlet passage, the location at which the mating gears diverge being remote from the path along which lubricant is supplied from the sump to the outlet passage.
Claim 5
Dependent Claim
57 words
The lubricant pump according to claim 2, wherein the pair of gears comprise at least a portion of a drive train for the transmission of power therethrough, and the outlet passage opens proximate the gear engagement location on the converging side; the pump further comprising means for conducting lubricant from the outlet passage to remote drive-train components.
Claim 6
Dependent Claim
59 words
The lubricant pump according to claim 2, wherein the channel receives teeth on the other gear proximate the point of engagement on the converging side thereof, and the channel-defining means includes channel sidewalls and a channel-bottom surface closely proximate the received teeth of both gears to restrict lubricant flow from within the channel other than through the outlet passage.
Claim 7
Dependent Claim
134 words
The lubricant pump according to claim 1, wherein the gears include teeth spaced apart about the peripheries of the gears, the channel-defining means includes a channel-bottom surface having two arcuate segments located closely proximate the extremity of the teeth of the two gears, at least one of the arcuate segments extending closely proximate the extremity of an associated gear substantially less than the longer arcuate distance from the convergence location to the location at which the gears diverge, and terminating proximate the periphery of the associated gear and within the sump to form, with the teeth on the associated gear, means for initiating the movement of lubricant from the sump toward said converging side, and the outlet passage opens through the channel-bottom surface where the gears converge to conduct lubricant from within the channel.
Claim 8
Dependent Claim
177 words
A lubricant pump including a casing having a sump for collecting lubricant, a pair of mating rotatable power-transmitting gears, at least one of the gears having teeth located for movement within the lubricant of the sump, means defining a channel receiving a number of the teeth of the one gear and extending in the direction of rotation of the one gear from a pump inlet end within the sump to a location proximate the engagement of the gears on the converging side thereof, the channel and the teeth received therein defining means for conveying lubricant from the sump at said pump inlet end to the gear convergence location proximate gear engagement, the gear divergence location proximate the engagement of the gears being remote from the path of movement of pumped lubricant to the gear convergence location, an outlet passage through the channel-defining means proximate the engagement of the gears for the discharge of lubricant outwardly therethrough, and means for directing the discharged lubricant away from the sump and the mating gears for the lubrication of further components.
Claim 9
Dependent Claim
177 words
A lubricant pump including a casing having a sump for collecting lubricant, a pair of mating rotatable power-transmitting gears, at least one of the gears having teeth located for movement within the lubricant of the sump, means defining a channel receiving a number of the teeth of the one gear and extending in the direction of rotation of the one gear from a pump inlet end within the sump to a location proximate the engagement of the gears on the converging side thereof, the channel and the teeth received therein defining means for conveying lubricant from the sump at said pump inlet end to the gear convergence location proximate gear engagement, the gear divergence location proximate the engagement of the gears being remote from the path of movement of pumped lubricant to the gear convergence location, an outlet passage through the channel-defining means proximate the engagement of the gears for the discharge of lubricant outwardly therethrough, and means for directing the discharged lubricant away from the sump and the mating gears for the lubrication of further components.
Claim 10
Dependent Claim
39 words
The lubricant pump according to claim 7, wherein the mating gears comprise part of an automotive drive train, said means for directing the discharged lubricant including means for supplying pumped lubricant to associated drive-train components remote from the sump.
Claim 11
Dependent Claim
24 words
The lubricant pump according to claim 7, wherein both of said mating gears have teeth located for movement within the lubricant in the sump.
Claim 12
Dependent Claim
47 words
The lubricant pump according to claim 9, wherein the location at which said gears mate is below the lubRicant level, the outlet passage and the means for directing providing means for conveying lubricant from below the lubricant level to components removed from the lubricant of the sump.
Claim 13
Dependent Claim
63 words
The lubricant pump according to claim 9, wherein the channel of said channel-defining means receives teeth on the other gear proximate the point of engagement on the converging side thereof, and the channel-defining means includes channel sidewalls and a channel-bottom surface closely proximate the received teeth of both gears to restrict lubricant flow from within the channel other than through the outlet passage.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |