US4639083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens mounting
Assignee: Canon Inc
•
Filing: 1984-08-08
•
Granted: 1987-01-27
•
Expires: 2004-08-08
Abstract
Abstract A lens mounting including a distance adjusting ring responsive to a signal representing the object to an in-focus position, and provided with an intermediate stopper retractable from an intermediate point in the range of rotation of the aforesaid distance adjusting ring.
Inventors
- 👤 Yutaka Fuziwara
- 👤 Hiroshi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:27
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/08; G02B7/023
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
A lens mounting comprising: (a) a focusing lens and a lens holder; (b) a distance adjusting ring for moving said focusing lens, said distance adjusting ring including a radial projection for stopping rotation of said distance adjusting ring; (c) a body tube including first and second stop portions for engagement with said radial projection of said distance adjusting ring; and (d) stop means for shortening the range of movement of said distance adjusting ring, said stop means including a stopper axially movable between a position for engagement with said radial projection of said distance adjusting ring and another position for disengagement therefrom.
Claim 2
Dependent Claim
102 words
A lens mounting comprising: (a) a focusing lens and a lens holder; (b) a distance adjusting ring for moving said focusing lens, said distance adjusting ring including a radial projection for stopping rotation of said distance adjusting ring; (c) a body tube including first and second stop portions for engagement with said radial projection of said distance adjusting ring; and (d) stop means for shortening the range of movement of said distance adjusting ring, said stop means including a stopper axially movable between a position for engagement with said radial projection of said distance adjusting ring and another position for disengagement therefrom.
Claim 3
Dependent Claim
50 words
A lens mounting according to claim 1, further including an abutment provided on the outer periphery of said distance adjusting ring for blocking movement of said stopper, whereby said stopper is prohibited from moving when said distance adjusting ring is in a certain region of the range of rotation thereof.
Claim 4
Dependent Claim
55 words
A lens mounting according to claim 1, further comprising: a movement prohibiting member for said stopper releasably engageable with said stopper of the stop means, said movement prohibiting member being mounted to said body tube and determining whether or not said stopper is allowed to move depending on the position of said distance adjusting ring.
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) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |