US4703966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum lifting arrangement
Assignee: LEWECKE MASCHINENBAU INDUTRIESTRASSE 10 D-4933 BLOMBERG GERMANY GmbH
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Filing: 1987-03-04
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Granted: 1987-11-03
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Expires: 2007-03-04
Abstract
Abstract A vacuum lifting arrangement for flat workpieces, such as wooden boards, wooden beams and the like, includes a vertically and horizontally movable housing bounding a suction chamber having a downwardly open suction side. A valve insert is accommodated in the suction chamber and is preferably removably mounted on the housing. A closing plate is hingedly mounted on the housing for pivoting into an out of a closing position in which it sealingly covers the downwardly open suction side of the suction chamber and the valve insert. An elastic sealing element in the form of a foamed mat having suction apertures is mounted on the closing plate, and is operative for sealingly contacting the workpieces to be lifted.
Inventors
- 👤 Ernst Lewecke
- 👤 Manfred Riesenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:12
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/02; B66C1/0281; B66C1/0237; B66C1/0243
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
101 words
A vacuum lifting arrangement for flat workpieces, such as wood beams and the like, comprising a movable housing bounding a suction chamber having a downwardly open suction side; a valve insert accommodated in said suction chamber; a closing plate hingedly mounted on said housing for pivoting into an out of a closing position in which it sealingly covers said downwardly open suction side of said suction chamber and said valve insert; and an elastic sealing element in the form of a foamed mat having suction apertures, mounted on said closing plate, and operative for sealingly contacting the workpieces to be lifted.
Claim 2
Dependent Claim
101 words
A vacuum lifting arrangement for flat workpieces, such as wood beams and the like, comprising a movable housing bounding a suction chamber having a downwardly open suction side; a valve insert accommodated in said suction chamber; a closing plate hingedly mounted on said housing for pivoting into an out of a closing position in which it sealingly covers said downwardly open suction side of said suction chamber and said valve insert; and an elastic sealing element in the form of a foamed mat having suction apertures, mounted on said closing plate, and operative for sealingly contacting the workpieces to be lifted.
Claim 3
Dependent Claim
55 words
The vacuum lifting arrangement as defined in claim 1, wherein said housing has a hood-shaped configuration having an elongated rectangular basic shape and a trapezoidal cross section having a large base side situated downwardly and being open; and wherein said base side is closed by said closing plate and said elastic sealing element mounted thereon.
Claim 4
Dependent Claim
70 words
The vacuum lifting arrangement as defined in claim 2, wherein said housing has two marginal flanges and said closing plate has two longitudinal edge portions; and further comprising hinge means for pivotally mounting one of said longitudinal edge portions on one of said marginal flanges, and at least two connecting means for releasably connecting the other of said longitudinal edge portions under tension to the other of said marginal flanges.
Claim 5
Dependent Claim
28 words
The vacuum lifting arrangement as defined in claim 3, wherein each of said connecting means includes one of threaded connecting means, buckle connecting means, and bayonet connecting means.
Claim 6
Dependent Claim
65 words
The vacuum lifting arrangement as defined in claim 3, wherein each of said connecting means includes threaded connecting means including a threaded bolt pivotally mounted on said closing plate and passing through an opening of said other marginal flange in a connecting position thereof, and a threaded hand nut threaded onto said threaded bolt and operative for arresting the same in said connecting position thereof.
Claim 7
Dependent Claim
14 words
The vacuum lifting arrangement as defined in claim 5, wherein said opening is bore-shaped.
Claim 8
Dependent Claim
14 words
The vacuum lifting arrangement as defined in claim 5, wherein said opening is slot-shaped.
Claim 9
Dependent Claim
19 words
The vacuum lifting arrangement as defined in claim 3, wherein said hinge means includes at least one rod hinge.
Claim 10
Dependent Claim
47 words
The vacuum lifting arrangement as defined in claim 8, wherein said hinge means includes a hinge axle extending in the longitudinal direction of said housing and extractable from the remainder of said hinge means for removal of said closing plate with said sealing element from said housing.
Claim 11
Dependent Claim
38 words
The vacuum lifting arrangement as defined in claim 1, and further comprising circumferentially extending sealing means secured to the lower sides of said housing and of said valve insert and sealingly engaged under tension by said closing plate.
Claim 12
Dependent Claim
56 words
The vacuum lifting arrangement as defined in claim 1, wherein said valve insert includes a hollow casing extending over the entire length of said housing and including internal partitioning walls that subdivide the interior of said casing into a plurlaity of individual chambers, and a plurality of valves each arranged in one of said individual chambers.
Claim 13
Dependent Claim
28 words
The lifting arrangemetn as defined in claim 11, wherein each of said valves is one of a tappet valve, dish valve, ball valve, jet nozzle and the like.
Claim 14
Dependent Claim
47 words
The lifting arrangement as defined in claim 11, wherein each of said valves is mounted in an upper wall of said valve insert for vertical movement, and wherein each of said individual chambers opens at a lower region thereof onto said closing plate by a large-area opening.
Claim 15
Dependent Claim
18 words
The lifting arrangement as defined in claim 11, wherein said valve insert is removably mounted in said housing.
Claim 16
Dependent Claim
66 words
The lifting arrangement as defined in claim 14, wherein said valve insert has two oppositely situated sides and includes at least two outwardly extending connecting lugs at each of said sides thereof, and said housing includes inwardly extending connecting webs; and further comprising connecting screws which extend through said connecting lugs and said connecting webs and serve for releasably mounting said valve insert in said housing.
Claim 17
Dependent Claim
60 words
The lifting arrangement as defined in claim 11, wherein said valve insert is accommodated in said suction chamber with a clearance at all sides from said housing; and further comprising a vacuum accumulator, means including a three-way valve and a hose conduit for connecting said vacuum accumulator with said suction chamber, and a vacuum pump connected to said vacuum accumulator.
Claim 18
Dependent Claim
52 words
The lifting arrangement as defined in claim 16, wherein said housing includes a nipple which is arranged at one longitudinal end of said housing and bounds a suction opening; and wherein said three-way valve is accommodated in said suction opening and is switchable between a suction position and an aerating position thereof.
Claim 19
Dependent Claim
77 words
The lifting arrangement as defined in claim 1, further comprising a plurality of additional housings, valve inserts, closing plates and sealing elements similar to said housing, valve insert, closing plate and sealing element, respectively and a vacuum accumulator, all of said housings being mounted underneath said vacuum accumulator for individual stepless vertical and horizontal movement and for arresting in position to form a vacuum lifting installation which is adjustable with respect to a distribution of suction openings.
Claim 20
Dependent Claim
34 words
The lifting arrangement as defined in claim 18, wherein said vacuum accumulator is configured as a housing or frame which is closed at all sides and holds all of said housings on respective guides.
Claim 21
Dependent Claim
112 words
The lifting arrangement as defined in claim 1, wherein said valve insert includes a hollow casing extending over the entire length of said housing and including internal partitioning walls that subdivide the interior of said casing into a plurality of individual chambers, and a plurality of valves each arranged in one of said individual chambers; and wherein said closing plate is provided with a suction opening at a region of each of said individual chambers of said valve insert, and said sealing element is provided at a region of each of said suction openings with a suction aperture having an elongated slot-shaped configuration extending transversely to the longitudinal direction of said housing.
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) | 1990-11-02 | 1991-05-04 | 1991-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-02 | 1995-05-04 | 1995-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-02 | 1999-05-04 | 1999-11-03 | $7700.00 | Window Closed / Lapsed |