Patent US3270695A successfully refreshed from Google Patents.
US3270695A
Expired / Lapsed
US
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Screwless-type presser-foot clamp
Assignee: Singer Co
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Filing: 1964-02-11
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Granted: 1966-09-06
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Expires: 1984-02-11
Abstract
No abstract record available.
Inventors
- 👤 Roger J Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:44
CPC Classifications
D; D05; D05B; D05B29/00; D05B29/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
IN A SEWING MACHINE HAVING A PRESSER-BAR INCLUDING A SLEEVE ENGAGING PORTION AND A CORRESPONDING PRESSERFOOT, MEANS FOR RELEASABLY CLAMPING THE PRESSER-FOOT TO THE PRESSER-BAR COMPRISING A SLEEVE MOUNTED UPON THE SLEEVE ENGAGING PORTION OF SAID PRESSER-BAR, SAID SLEEVE ENGAGING PORTION HAVING A VERTICAL SHANK ENGAGING SLOT AND A CLEARANCE SLOT EXTENDING TRANSVERSELY TO THE VERTICAL SHANK ENGAGING SLOT, MEANS CONNECTING THE SLEEVE TO THE PRESSER-BAR FOR BIASING THE SLEEVE FOR TURNING MOVEMENT UPON SAID SLEEVE ENGAGING PORTION, SAID PRESSERFOOT INCLUDING AN ELONGATED SHANK, SAID ELONGATED SHANK BEING ADAPTED TO FIT INTO THE VERTICAL SHANK ENGAGING SLOT, SAID SHANK HAVING AN INDENT THEREIN, SAID SLEEVE HAVING A PAIR OF ALIGNED LOCKING PIN RECEIVING BORES TRANSVERSE TO THE LONGITUDINAL AXIS OF THE SLEEVE, AND A LOCKING PIN ADAPTED TO SLIP INTO THE PIN RECEIVING BORES AND THROUGH THE CLEARANCE SLOT WHEREBY SAID SLEEVE BIASING MEANS EXERTS A FORCE WHICH URGES THE LOCKING PIN INTO ENGAGEMENT WITH SAID INDENT THEREBY LOCKING THE PRESSER-FOOT TO THE PRESSER-BAR.
Claim 2
Dependent Claim
164 words
IN A SEWING MACHINE HAVING A PRESSER-BAR INCLUDING A SLEEVE ENGAGING PORTION AND A CORRESPONDING PRESSERFOOT, MEANS FOR RELEASABLY CLAMPING THE PRESSER-FOOT TO THE PRESSER-BAR COMPRISING A SLEEVE MOUNTED UPON THE SLEEVE ENGAGING PORTION OF SAID PRESSER-BAR, SAID SLEEVE ENGAGING PORTION HAVING A VERTICAL SHANK ENGAGING SLOT AND A CLEARANCE SLOT EXTENDING TRANSVERSELY TO THE VERTICAL SHANK ENGAGING SLOT, MEANS CONNECTING THE SLEEVE TO THE PRESSER-BAR FOR BIASING THE SLEEVE FOR TURNING MOVEMENT UPON SAID SLEEVE ENGAGING PORTION, SAID PRESSERFOOT INCLUDING AN ELONGATED SHANK, SAID ELONGATED SHANK BEING ADAPTED TO FIT INTO THE VERTICAL SHANK ENGAGING SLOT, SAID SHANK HAVING AN INDENT THEREIN, SAID SLEEVE HAVING A PAIR OF ALIGNED LOCKING PIN RECEIVING BORES TRANSVERSE TO THE LONGITUDINAL AXIS OF THE SLEEVE, AND A LOCKING PIN ADAPTED TO SLIP INTO THE PIN RECEIVING BORES AND THROUGH THE CLEARANCE SLOT WHEREBY SAID SLEEVE BIASING MEANS EXERTS A FORCE WHICH URGES THE LOCKING PIN INTO ENGAGEMENT WITH SAID INDENT THEREBY LOCKING THE PRESSER-FOOT TO THE PRESSER-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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |