US3924434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for shaping hollow metal bodies
Assignee: VYSKUMNY USTAV MECHANIZACIE A AUTOMATIZACIE
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Filing: 1974-04-25
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Granted: 1975-12-09
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Expires: 1994-04-25
Abstract
Abstract Apparatus for shaping hollow metal bodies such as hollow rivets and the like on a mandrel including a hollow supporting sleeve adapted to receive the body and the mandrel. At least two forming bodies located in openings in the wall of the supporting sleeve, symmetrically with respect to the longitudinal axis of the sleeve. The forming bodies such as freely rotating balls or rollers with their external circumference against a pressure element surrounding at least in part the supporting sleeve and biasing the forming bodies against the surface of the hollow body.
Inventors
- 👤 Josef Fulier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:26
CPC Classifications
B; B21; B21D; B21D17/00; B21D17/04; B21D39/00; B21D39/04; B21H; B21H3/00; B21H3/08; B21H7/00; B21H7/18; B21H7/187; B21J; B21J5/00; B21J5/06; B21J5/12; B21K; B21K25/00; B23; B23P; B23P11/00; B23P11/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
114 words
Apparatus for shaping hollow metal blind rivets comprising a hollow support having a cylindrical bore, at least one radial opening formed in said support, forming elements rotatably arranged in said radial openings and extending into said bore, an elongated mandrel for receiving and axially inserting said rivets within said bore, said mandrel having an outer contour conforming to the desired shape of said rivet, a movable pressure element at least partially surrounding said support and engaging the external surfaces of the forming element to conjointly roll therewith and to exert a radially inward force on each movement of said mandrel and rivet through said bore, to cause said forming elements to shape said rivet.
Claim 2
Dependent Claim
114 words
Apparatus for shaping hollow metal blind rivets comprising a hollow support having a cylindrical bore, at least one radial opening formed in said support, forming elements rotatably arranged in said radial openings and extending into said bore, an elongated mandrel for receiving and axially inserting said rivets within said bore, said mandrel having an outer contour conforming to the desired shape of said rivet, a movable pressure element at least partially surrounding said support and engaging the external surfaces of the forming element to conjointly roll therewith and to exert a radially inward force on each movement of said mandrel and rivet through said bore, to cause said forming elements to shape said rivet.
Claim 3
Dependent Claim
12 words
The apparatus according to claim 1 wherein the forming element is spherical.
Claim 4
Dependent Claim
14 words
The apparatus according to claim 1 wherein the forming element comprises a cylindrical roller.
Claim 5
Dependent Claim
45 words
The apparatus according to claim 1 wherein the pressure element comprises a sleeve surrounding said support and is provided with resilient means normally biasing said sleeve against axial movement in one direction the movement of said rivet and mandrel through said bore, overcoming said bias.
Claim 6
Dependent Claim
20 words
The apparatus according to claim 4 including means for limiting the axial movement of said sleeve in said one direction.
Claim 7
Dependent Claim
33 words
The apparatus according to claim 1 wherein the pressure element is formed by a rotating roller journalled on said support and rotatable about an axis angular to the axis of the cylindrical bore.
Claim 8
Dependent Claim
25 words
The apparatus according to claim 1 wherein said pressure element comprises a member movable with respect to both said forming element and said hollow support.
Claim 9
Dependent Claim
44 words
The apparatus according to claim 1 wherein said forming elements are freely mounted within openings and being movable radially with respect to said support, said pressure element being spaced from the surface of said support and limiting the outward movement of said forming element.
Claim 10
Dependent Claim
19 words
The apparatus according to claim 1 wherein the contour of said mandrel conforms to that of the forming elements.
Claim 11
Dependent Claim
34 words
The apparatus according to claim 1 wherein a plurality of openings are formed in the support, symmetrically with respect to longitudinal axis, each having a forming element arranged therein and an associated pressure element.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |