Patent US3583200A successfully refreshed from Google Patents.
US3583200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanding head and improved seal therefor
Assignee: CM-MACK INVESTMENTS Inc A CORP OF DE N/K/A GROTNES METALFORMING SYSTEMS Inc
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Filing: 1969-05-19
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Granted: 1971-06-08
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Expires: 1989-05-19
Abstract
Abstract A sealed expanding head is provided for an expanding mandrel machine tool. The head includes a plurality of radially expansible and contractable die units and an expansion cone drawn between the units to expand them. The space between adjacent units is sealed against the loss of lubricant and the entrance of scale and other debris by an elongate flexible sealing element having a generally U-shaped cross section, with the free ends removably mounted in the adjacent segments.
Inventors
- 👤 Ratko Cvijanovic
- 👤 Hans R Luedi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:09
CPC Classifications
F; F16; F16J; F16J15/00; B; B21; B21D; B21D22/00; B21D22/02; B21D22/025; B21D41/00; B21D41/02; Y; Y10; Y10S; Y10S425/00; Y10S425/014
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
A sealing element for use with expanding heads of the type having a plurality of radially expansible and contractable die units, said element being formed of resilient nonmetallic material, longitudinally uniform, and having a generally U-shaped cross-sectional configuration defining a pair of sealing legs for sealing engagement with respective different ones of a pair of adjacent die units, said element including means for securing said legs to respective different ones of a pair of adjacent die units.
Claim 2
Dependent Claim
77 words
A sealing element for use with expanding heads of the type having a plurality of radially expansible and contractable die units, said element being formed of resilient nonmetallic material, longitudinally uniform, and having a generally U-shaped cross-sectional configuration defining a pair of sealing legs for sealing engagement with respective different ones of a pair of adjacent die units, said element including means for securing said legs to respective different ones of a pair of adjacent die units.
Claim 3
Dependent Claim
23 words
SealIng element of claim 1 wherein said resilient nonmetallic material is selected from the group consisting of polyethylene, polypropylene, a nylon, and polytetrafluoroethylene.
Claim 4
Dependent Claim
34 words
Sealing element of claim 1 wherein said securing means comprises an external flange near the end of each of said legs and receivable in a corresponding undercut in each of said adjacent die units.
Claim 5
Dependent Claim
116 words
A sealed expanding head of the type including a plurality of radially expansible and contractable die units together with means for controlled actuation thereof and sealing means interposed between each adjacent pair of die units, said sealing means comprising in combination with said expanding head an elongated resilient sealing element having a generally U-shaped cross-sectional configuration defining a pair of sealing legs, a pair of flanges formed near the free ends of said legs and extending substantially the entire length of said elongated flexible sealing element, and a flange-receiving recess in each of said adjacent die units whereby lubricant is retained within said expanding head and scale and other debris is prevented from entering said head.
Claim 6
Dependent Claim
116 words
A sealed expanding head of the type including a plurality of radially expansible and contractable die units together with means for controlled actuation thereof and sealing means interposed between each adjacent pair of die units, said sealing means comprising in combination with said expanding head an elongated resilient sealing element having a generally U-shaped cross-sectional configuration defining a pair of sealing legs, a pair of flanges formed near the free ends of said legs and extending substantially the entire length of said elongated flexible sealing element, and a flange-receiving recess in each of said adjacent die units whereby lubricant is retained within said expanding head and scale and other debris is prevented from entering said head.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |