US4432659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel pump armature shaft bearing
Assignee: Walbro Corp
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Filing: 1982-03-12
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Granted: 1984-02-21
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Expires: 2002-03-12
Abstract
Abstract A cylindrical Teflon bearing insert for a rotating shaft is molded into a fuel pump end housing with a hexagonal inside diameter and outside diameter recess to provide flat bearing surfaces for a shaft and a mechanical interlock in the end housing. A longitudinal variance in diametric dimensions provides effective shaft contact.
Inventors
- 👤 Charles H. Tuckey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:59
CPC Classifications
F; F16; F16C; F16C35/00; F16C35/02; F16C33/00; F16C33/02; F16C33/04; F16C33/20; H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1672; F16C2208/00; F16C2208/20; F16C2208/30; F16C2208/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
In a device having a rotating shaft journalled at one end in a molded plastic portion of a housing, that improvement which comprises a hollow cylindrical bearing insert molded into a recess in said housing and formed of a plastic such as polytetrafluorethylene, said insert having a close running fit with said rotating shaft and shaped internally and externally with a polygonal configuration, the sides of the internal polygon being in running contact with said shaft and the sides of the external polygon being in mechanical engagement with said housing, said insert having a substantial portion of its outer end extending axially out of said recess to the extent of about one-half the axial length, and said insert having a larger diameter at its outer end beyond said recess and at the inner end within said recess in comparison to a smaller diameter at a central section in the area of the mouth of said recess.
Claim 2
Dependent Claim
156 words
In a device having a rotating shaft journalled at one end in a molded plastic portion of a housing, that improvement which comprises a hollow cylindrical bearing insert molded into a recess in said housing and formed of a plastic such as polytetrafluorethylene, said insert having a close running fit with said rotating shaft and shaped internally and externally with a polygonal configuration, the sides of the internal polygon being in running contact with said shaft and the sides of the external polygon being in mechanical engagement with said housing, said insert having a substantial portion of its outer end extending axially out of said recess to the extent of about one-half the axial length, and said insert having a larger diameter at its outer end beyond said recess and at the inner end within said recess in comparison to a smaller diameter at a central section in the area of the mouth of said recess.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |