Patent US3835690A successfully refreshed from Google Patents.
US3835690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for connecting metallic sleeves to finned reinforcing bars
Assignee: Ed Zueblin AG
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Filing: 1971-10-26
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Granted: 1974-09-17
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Expires: 1991-10-26
Abstract
Abstract Apparatus is disclosed for connecting sleeves to fin-equipped reinforcing bars for concrete, which bars consist of a material which is harder than the material of said sleeve. The sleeve is deformed by pressure in such a way that the fins of said reinforcing bar means press themselves into the sleeve and positively interlock therewith while the deformation of the sleeve is effected in sections over the length of the sleeve.
Inventors
- 👤 W Fastenau
- 👤 F Leonhardt
- 👤 V Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:18
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/16; E04C5/162; E04C5/163; E04C5/165; B; B21; B21D; B21D39/00; B21D39/04; B21D39/046; B21F; B21F15/00; B21F15/02; B21F15/06; H; H01; H01R; H01R43/00; H01R43/04; H01R43/042; H01R43/0425; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T29/49934; Y10T403/00; Y10T403/49; Y10T403/4966; Y10T403/55; Y10T403/557
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
An apparatus for joining sleeve means surrounding concrete reinforcing bar means to the latter, which includes: cylinder means having transverse passage means therethrough for receiving concrete reinforcing bar means and at least a portion of sleeve means surrounding the same, fluid operable piston means reciprocable in said cylinder means, first die means detachably connected to said piston means for exerting deforming pressure upon sleeve means to be connected to bar means introduced into said passage means, second die means detachably connected to said cylinder means and forming the counterpart to said first die means for deforming said sleeve means from the opposite side with regard to the portion to be deformed by said first die means, the front and rear edge portions of said first and second die means when looking in the longitudinal direction of said sleeve means flaring away from each other, and a stepping mechanism for stepwise advancing said bar means with said sleeve means.
Claim 2
Independent Claim
158 words
An apparatus for joining sleeve means surrounding concrete reinforcing bar means to the latter, which includes: cylinder means having transverse passage means therethrough for receiving concrete reinforcing bar means and at least a portion of sleeve means surrounding the same, fluid operable piston means reciprocable in said cylinder means, first die means detachably connected to said piston means for exerting deforming pressure upon sleeve means to be connected to bar means introduced into said passage means, second die means detachably connected to said cylinder means and forming the counterpart to said first die means for deforming said sleeve means from the opposite side with regard to the portion to be deformed by said first die means, the front and rear edge portions of said first and second die means when looking in the longitudinal direction of said sleeve means flaring away from each other, and a stepping mechanism for stepwise advancing said bar means with said sleeve means.
Claim 3
Dependent Claim
19 words
An apparatus in combination according to claim 1, in which the flaring edge portions of die means are rounded.
Claim 4
Dependent Claim
54 words
An apparatus according to claim 1, in which said stepping mechanism comprises gauge means detachably connected to said bar means, said gauge means having recess means arranged one behind the other when looking in the direction of said bar means, and pawl means connected to said cylinder means for successively engaging said recess means.
Claim 5
Dependent Claim
28 words
An apparatus according to claim 3, in which said gauge means is of U-shaped cross section and comprises a clamping screw for detachable connection to said bar means.
Claim 6
Dependent Claim
29 words
An apparatus according to claim 3, in which said pawl means is pivotable about an axis extending in a direction transverse to the longitudinal axis of said passage means.
Claim 7
Dependent Claim
28 words
An apparatus according to claim 3, which includes spring means arranged within said cylinder means and continuously urging said piston means in the direction toward said passage means.
Claim 8
Dependent Claim
24 words
An apparatus in combination according to claim 1, in which said second die means is connected to said cylinder means by a bayonet joint.
Claim 9
Dependent Claim
42 words
An apparatus in combination according to claim 1, in which that portion of said cylinder means which has said second die means arranged therein is provided with axial slot means having a width in excess of the diameter of said sleeve means.
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |