US4355542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scavenging pump
Assignee: KOMATSU SEISAKUSHO 3-6 KK
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Filing: 1980-08-25
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Granted: 1982-10-26
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Expires: 2000-08-25
Abstract
Abstract A scavenging gear pump for use in a final drive comprising a drive gear and a driven gear, each being mounted for rotation and in mesh with each other. The drive gear is coupled with an input shaft and rotated thereby and has formed therein a fluid passage for communicating an outlet port of the pump with a fluid chamber formed in the input shaft. A plurality of guide passages are formed in the input shaft for supplying lubricant from the fluid chamber to rotary components, such as bearings and gears.
Inventors
- 👤 Yoshio Tsutsumi
- 👤 Tomoyuki Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:38
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/0434; F01; F01M; F01M9/00; F04; F04C; F04C15/00; F04C15/0088; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19991
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
150 words
A scavenging gear pump for use in a final drive including a casing for the final drive, the casing having formed therein a fluid reservoir for lubricant, and an input shaft rotatably supported through bearing means in said casing, said input shaft having formed therein a first fluid chamber leading to said bearing means, said scavenging gear pump comprising: a housing detachably mounted on said casing, said housing having formed therein an inlet port and an outlet port of said pump and a second fluid chamber communicating with said outlet port, said inlet port being communicated with said fluid reservoir; a drive gear rotatably mounted in said housing, said drive gear being coupled with said input shaft and having formed therein a fluid passage interconnecting said first and second fluid chambers; and a driven gear rotatably mounted in said housing, said driven gear being in mesh with said drive gear.
Claim 2
Dependent Claim
150 words
A scavenging gear pump for use in a final drive including a casing for the final drive, the casing having formed therein a fluid reservoir for lubricant, and an input shaft rotatably supported through bearing means in said casing, said input shaft having formed therein a first fluid chamber leading to said bearing means, said scavenging gear pump comprising: a housing detachably mounted on said casing, said housing having formed therein an inlet port and an outlet port of said pump and a second fluid chamber communicating with said outlet port, said inlet port being communicated with said fluid reservoir; a drive gear rotatably mounted in said housing, said drive gear being coupled with said input shaft and having formed therein a fluid passage interconnecting said first and second fluid chambers; and a driven gear rotatably mounted in said housing, said driven gear being in mesh with said drive gear.
Claim 3
Dependent Claim
41 words
A scavenging gear pump as recited in claim 1 wherein said input shaft has a gear fixedly secured thereto and wherein a guide passage is formed in said input shaft for supplying lubricant from said first fluid chamber to said gear.
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) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |