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US4114418A Expired / Lapsed US ⏱️ 0.0 years remaining

Material handling means

Assignee: Individual
•
Filing: 1976-12-09
•
Granted: 1978-09-19
•
Expires: 1996-12-09
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Abstract

Abstract A press brake plate lifter has horizontally extending lift rails pivotally mounted to a supporting framework, for supporting and lifting sheet stock during press brake operations. The lift rail pivot axis is coextensive with the bending axis of the press brake die. The material support lift rails are horizontally adjustable to accommodate sheet stock of varying dimensions, while plate clamps mounted on the lift rails hold the sheet stock firmly during the bending operation.

Inventors

  • 👤 David J. Jarman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 06:30
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/02; B21D5/0281

Claims Analysis

Total Claims: 17
Claim 1
Independent Claim 94 words
In a combination with a mechanical press having a movable die and a fixed die, said movable die and said fixed die meeting at a bending axis, material handling means, said material handling means comprising: a base frame; a lift frame; said lift frame being pivoted to said base frame along a pivot axis, said base frame and said lift frame positioning said pivot axis co-linearly with said bending axis; and means to support material to be processed by said press brake, said material support means being laterally adjustably mounted to said lift frame.
Claim 2
Dependent Claim 94 words
In a combination with a mechanical press having a movable die and a fixed die, said movable die and said fixed die meeting at a bending axis, material handling means, said material handling means comprising: a base frame; a lift frame; said lift frame being pivoted to said base frame along a pivot axis, said base frame and said lift frame positioning said pivot axis co-linearly with said bending axis; and means to support material to be processed by said press brake, said material support means being laterally adjustably mounted to said lift frame.
Claim 3
Dependent Claim 55 words
The apparatus as recited in claim 1 wherein said lift frame includes spaced apart transverse members; and said material support means includes means to selectively position said material support means selectively along said transverse members, said positioning means including a follower engaging said transverse members, whereby said material support means may be selectively laterally positioned.
Claim 4
Dependent Claim 36 words
The apparatus as recited in claim 1 wherein said support frame includes means to adjust the height of said support frame, said height adjustment means enabling an alignment of said pivot axis with said bending axis.
Claim 5
Dependent Claim 52 words
The apparatus as recited in claim 1 wherein said support frame includes a pair of side frame members connected by transverse channel members to form a generally U-shaped configuration, said side frame members and said channel members being dimensioned to fit closely about a portion of the periphery of said press brake.
Claim 6
Dependent Claim 25 words
The apparatus as recited in claim 1 wherein said support frame include means to selectively move said support frame to and from said press brake.
Claim 7
Dependent Claim 33 words
The apparatus as recited in claim 1 wherein said material support means includes at least one clamp, said clamp being adjustable to secure sheet material of varying thicknesses to said material support means.
Claim 8
Dependent Claim 18 words
The apparatus as recited in claim 1 wherein said bending axis and said pivot axis are horizontally co-linear.
Claim 9
Dependent Claim 30 words
The apparatus as recited in claim 2 wherein said material support means includes at least two material support frame members, said material support frame members being independently selectively laterally positionable.
Claim 10
Dependent Claim 132 words
In combination with a mechanical press, having a movable die and a fixed die, said movable die and said fixed die meeting at a bending axis, means to handle material to be processed by said press, said material handling means comprising: a base frame, said base frame including a pair of side frame members connected by transverse channel members in a generally U-shaped configuration, said base frame being dimensioned to fit closely about the periphery of said press; a lift frame, said lift frame including a pair of vertically spaced-apart transverse members, said lift frame and said base frame pivotally connected along a pivot axis, said pivot axis co-linearly positioned with said bending axis; and means to support said material, said material support means being laterally adjustably mounted to said lift frame.
Claim 11
Dependent Claim 132 words
In combination with a mechanical press, having a movable die and a fixed die, said movable die and said fixed die meeting at a bending axis, means to handle material to be processed by said press, said material handling means comprising: a base frame, said base frame including a pair of side frame members connected by transverse channel members in a generally U-shaped configuration, said base frame being dimensioned to fit closely about the periphery of said press; a lift frame, said lift frame including a pair of vertically spaced-apart transverse members, said lift frame and said base frame pivotally connected along a pivot axis, said pivot axis co-linearly positioned with said bending axis; and means to support said material, said material support means being laterally adjustably mounted to said lift frame.
Claim 12
Dependent Claim 39 words
The apparatus as recited in claim 9 wherein said material support means includes at least one cam follower, said cam follower contacting said transverse members whereby said material support means may be selectively laterally positioned along said transverse members.
Claim 13
Dependent Claim 30 words
The apparatus as recited in claim 9 wherein said material support means includes two or more material support members, said material support members independently laterally adjustably mounted to said frame.
Claim 14
Dependent Claim 27 words
The apparatus as recited in claim 11 wherein said lift frame members are adapted to extend horizontally when said material handling means is in a lowermost position.
Claim 15
Dependent Claim 34 words
The apparatus as recited in claim 9 wherein said material support means includes at least one clamp, said clamp being adapted to mechanically secure sheet material of varying thicknesses to said material support means.
Claim 16
Dependent Claim 36 words
The apparatus as recited in claim 9 wherein said transverse members extend parallel to said pivot axis and to said bending axis, and said material support means extend at a right angle to said transverse members.
Claim 17
Dependent Claim 26 words
The apparatus as recited in claim 9 wherein said material handling means includes means to hydraulically pivot said lift frame with respect to said base frame.

References Cited (Backward Citations)

US2429387A Cited
US3618349A Cited
US3748890A Cited
US3855840A Cited
US3740996A Cited
GB1358832A Cited
US3826119A Cited
US3861193A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-09-18 1982-03-20 1982-09-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-09-18 1986-03-20 1986-09-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-09-18 1990-03-20 1990-09-19 $7700.00 Window Closed / Lapsed

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