US3938237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of securing tubular bellows to a cylinder
Assignee: ZF Friedrichshafen AG
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Filing: 1974-07-17
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Granted: 1976-02-17
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Expires: 1994-07-17
Abstract
Abstract A yieldably resilient, tubular bellows is fastened to a metal cylinder by first inserting an axial end portion of the bellows in a more rigid clamping ring whose internal cross section is greater than the cross section of the cylinder, but not substantially greater than that of the outer cross section of the bellows, then axially juxtaposing the bellows and the cylinder, and exerting axial pressure in opposite directions on the ring and the cylinder while preventing the bellows from moving out of the ring until an axially terminal portion of the cylinder enters the bore of the bellows, smaller in cross section than the cylinder, and is axially coextensive with the ring, whereby the bellows is radially compressed between the ring and the cylinder.
Inventors
- 👤 Erwin Dunz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:33
CPC Classifications
F; F16; F16J; F16J3/00; F16J3/04; F16J3/041; F16J3/042; F16L; F16L33/00; F16L33/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49945; Y10T403/00; Y10T403/45; Y10T403/453
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
223 words
A method of securing a yieldably resilient first body to a second cylindrical body more rigid than said first body, said bodies having respective axes, and said first body being formed with an axial bore therethrough of smaller cross section in the relaxed condition of said first body than the cross section of said second body, which method comprises: a. inserting said first body in a clamping ring more rigid than said first body; 1. the internal cross section of said ring being greater than said cross section of said second body, but not substantially greater than the outer cross section of said first body, 2. said first body being inserted into said ring until an axially terminal portion of said first body projects beyond said ring, 3. said portion of said first body being formed with an orifice of said bore, and said second body entering said orifice under said exerted axial pressure; b. axially juxtaposing said bodies; and c. exerting axial pressure in opposite respective directions on said ring and on said second body while preventing said first body from moving out of said ring, until an axially terminal portion of said second body enters said bore and is axially coextensive with said ring, whereby a portion of said first body is radially compressed between said ring and said second body.
Claim 2
Independent Claim
223 words
A method of securing a yieldably resilient first body to a second cylindrical body more rigid than said first body, said bodies having respective axes, and said first body being formed with an axial bore therethrough of smaller cross section in the relaxed condition of said first body than the cross section of said second body, which method comprises: a. inserting said first body in a clamping ring more rigid than said first body; 1. the internal cross section of said ring being greater than said cross section of said second body, but not substantially greater than the outer cross section of said first body, 2. said first body being inserted into said ring until an axially terminal portion of said first body projects beyond said ring, 3. said portion of said first body being formed with an orifice of said bore, and said second body entering said orifice under said exerted axial pressure; b. axially juxtaposing said bodies; and c. exerting axial pressure in opposite respective directions on said ring and on said second body while preventing said first body from moving out of said ring, until an axially terminal portion of said second body enters said bore and is axially coextensive with said ring, whereby a portion of said first body is radially compressed between said ring and said second body.
Claim 3
Dependent Claim
30 words
A method as set forth in claim 1, wherein said axially terminal portion of said second body has a beveled leading edge first engaging said first body during said entering.
Claim 4
Dependent Claim
33 words
A method as set forth in claim 1, wherein said axial pressure is exerted on a radial face of said ring directed away from said second body while said bodies are axially juxtaposed.
Claim 5
Dependent Claim
36 words
A method as set forth in claim 3, wherein said first body is prevented from moving out of said ring during said exerting of axial pressure by frictional engagement between said first body and said ring.
Claim 6
Dependent Claim
45 words
A method as set forth in claim 3, wherein said first body is prevented from moving out of said ring until said portion of said second body enters said bore by exerting axial force on said first body in a direction toward said second body.
Claim 7
Dependent Claim
39 words
A method as set forth in claim 3, wherein said first body is prevented from moving out of said ring during said exerting of axial pressure by adhesively fastening said ring to said first body prior to said exerting.
Claim 8
Dependent Claim
32 words
A method as set forth in claim 1, wherein said projecting axially terminal portion of said first body is prevented from moving inward of said ring during said exerting of axial pressure.
Claim 9
Dependent Claim
87 words
A method as set forth in claim 7, wherein said axial pressure is exerted until said axially terminal portion of said second body projects from said bore in an axial direction away from the axially terminal portion of said first body, whereby respective annular parts of said first body are coextensive with respective parts of said second body and axially offset from said ring in respective opposite axial directions, and the outer diameter of said annular parts is greater than the outer diameter of said compressed portion.
Claim 10
Dependent Claim
37 words
A method as set forth in claim 8, wherein said annular parts and said compressed portion, when in the relaxed condition, have outer faces of the same cross section and inner faces of the same cross section.
Claim 11
Dependent Claim
16 words
A method as set forth in claim 9, wherein said outer and inner faces are cylindrical.
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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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |