US3758144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum center lift
Assignee: TILT-LOCK Inc MINNEAPOLIS
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Filing: 1972-01-06
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Granted: 1973-09-11
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Expires: 1992-01-06
Abstract
Abstract An apparatus for lifting rolls of sheet material comprising a probe with expansible jaws for engaging the center of the roll of material in combination with a vacuum disc which prevents roll of material from telescoping.
Inventors
- 👤 H Dalglish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:15
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/02; B66C1/0231; B66C1/0212; B66C1/0293; B66C1/10; B66C1/42; B66C1/44; B66C1/54
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
Apparatus for handling rolls of material comprising: a lifting probe having movable jaw means therein for releasably engaging the inside of the center core of the roll for lifting the roll; and a vacuum applying means mounted on and extending around said probe in fixed relation thereto and connected to a vacuum source so as to engage the end of the roll of material in conjunction with said probe engaging said center core whereby when the roll is lifted by the probe, the vacuum means will prevent relative movement of the material on the roll.
Claim 2
Dependent Claim
95 words
Apparatus for handling rolls of material comprising: a lifting probe having movable jaw means therein for releasably engaging the inside of the center core of the roll for lifting the roll; and a vacuum applying means mounted on and extending around said probe in fixed relation thereto and connected to a vacuum source so as to engage the end of the roll of material in conjunction with said probe engaging said center core whereby when the roll is lifted by the probe, the vacuum means will prevent relative movement of the material on the roll.
Claim 3
Dependent Claim
43 words
The apparatus of claim 1 in which said vacuum means comprises a generally flat member mounted generally perpendicular around said probe and having circumferential inner and outer rubber seals thereon, said vacuum source being connected to a hole in said generally flat member.
Claim 4
Dependent Claim
21 words
The apparaTus of claim 2 in which said generally flat member comprises a disc having a plurality of radial spacers thereon.
Claim 5
Dependent Claim
17 words
The apparatus of claim 3 in which said disc is mounted to a flange on said probe.
Claim 6
Dependent Claim
25 words
The apparatus of claim 1 including a source of pressurized air connected to deliver air to the center core of said roll through said probe.
Claim 7
Dependent Claim
25 words
The apparatus of claim 4 including a source of pressurized air connected to deliver air to the center core of said roll through said probe.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |