US3785310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant sealing device for a work feeding mechanism of a sewing machine
Assignee: Virginio Rimoldi and Co SpA
•
Filing: 1972-03-02
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Granted: 1974-01-15
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Expires: 1992-03-02
Abstract
Abstract A lubricant seal member for a sewing machine carried on the feed bars that actuate the device for advancing a workpiece as it is sewn and disposed so as to prevent the leakage of lubricant from the source of drive for the feed bars to the workpiece advancing device.
Inventors
- 👤 N Marforio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:00
CPC Classifications
D; D05; D05B; D05B71/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
A lubricant sealing device for the workpiece feeding mechanism of a sewing machine of the type having at least one feed bar movable in a horizontal and vertical direction to define an elliptical pathway for a toothed feed dog carried thereon, the improvement comprising: a. a support member having a guide channel within which movement of the feed bar is guided; b. a flexible lubricant sealing element having internal surfaces conforming to the cross sectional configuration of the feed bar defining an opening through which the latter extends; c. guide means on said support member for permitting vertical movement only of said sealing element during actuation of the feed bar.
Claim 2
Dependent Claim
110 words
A lubricant sealing device for the workpiece feeding mechanism of a sewing machine of the type having at least one feed bar movable in a horizontal and vertical direction to define an elliptical pathway for a toothed feed dog carried thereon, the improvement comprising: a. a support member having a guide channel within which movement of the feed bar is guided; b. a flexible lubricant sealing element having internal surfaces conforming to the cross sectional configuration of the feed bar defining an opening through which the latter extends; c. guide means on said support member for permitting vertical movement only of said sealing element during actuation of the feed bar.
Claim 3
Dependent Claim
20 words
The lubricant sealing device according to claim 1 wherein said sealing element is fabricated from wear resistant organic sheet material.
Claim 4
Dependent Claim
40 words
The lubricant sealing device according to claim 1 wherein said guide means includes means defining vertically disposed opposed pathways within which the sides of said sealing element extend for guiding the latter during its vertical movement by the feed bar.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |