US4582350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helically threaded mechanism
Assignee: Canon Inc
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Filing: 1984-10-10
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Granted: 1986-04-15
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Expires: 2004-10-10
Abstract
Abstract A helicoid thread mechanism which comprises a male helically threaded tube and a female helically threaded tube is provided with a helically threaded block for threadedly engaging the female tube onto the male tube. A sliding frictional contact noise which is produced between the two tube members when they engage with each other is eliminated by suitable selection on the helically threaded shape and the material of the block.
Inventors
- 👤 Hidekazu Okajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:00
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
A helicoid mechanism comprising: male and female helically threaded tubes; a plurality of stowing parts such as recesses or openings formed in the outer circumference of said male tube; block pieces provided with helically threaded parts for threaded engagement with said female tube and inserted in said stowing parts respectively; and a tooth profile of the threaded portion of said male tube being shorter than that of the threaded parts of said block pieces.
Claim 2
Dependent Claim
74 words
A helicoid mechanism comprising: male and female helically threaded tubes; a plurality of stowing parts such as recesses or openings formed in the outer circumference of said male tube; block pieces provided with helically threaded parts for threaded engagement with said female tube and inserted in said stowing parts respectively; and a tooth profile of the threaded portion of said male tube being shorter than that of the threaded parts of said block pieces.
Claim 3
Dependent Claim
36 words
A helicoid mechanism according to claim 1, wherein said male and female tubes are made of a plastic material containing glass fiber; while said block pieces are made of a plastic material not containing glass fiber.
Claim 4
Dependent Claim
37 words
A helicoid mechanism according to claim 2, wherein said male and female tubes are made of a poly-carbonate resin material containing glass fiber; and said block pieces are made of a poly-acetal resin material containing molybdenum disulfide.
Claim 5
Dependent Claim
91 words
A helicoid mechanism comprising: male and female helically threaded tubes; a plurality of stowing parts such as recesses or openings formed in the outer circumference of said male tube; block pieces provided with helically threaded parts for threaded engagement with said female tube and inserted in said stowing parts respectively; said block pieces and said stowing parts having said block pieces turnable for adjustment so as to eliminate rattling or play of the threaded engagement between said female tube and said block pieces by the turning movement of said block pieces.
Claim 6
Dependent Claim
91 words
A helicoid mechanism comprising: male and female helically threaded tubes; a plurality of stowing parts such as recesses or openings formed in the outer circumference of said male tube; block pieces provided with helically threaded parts for threaded engagement with said female tube and inserted in said stowing parts respectively; said block pieces and said stowing parts having said block pieces turnable for adjustment so as to eliminate rattling or play of the threaded engagement between said female tube and said block pieces by the turning movement of said block pieces.
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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) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |