Patent US4800437A successfully refreshed from Google Patents.
Patent US3828639A successfully refreshed from Google Patents.
US3828639A
Expired / Lapsed
US
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Shear mounting for corner shearing machine
Assignee: Murata Wiedemann Inc
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Filing: 1972-08-14
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Granted: 1974-08-13
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Expires: 1992-08-14
Abstract
Abstract A corner shearing machine has two pairs of shears, the lower blade of one pair intersecting the lower blade of another at a right angle, and the upper blade of one pair intersecting the upper blade of the other pair at a right angle, the lower blades being mounted to a base and the upper blades to a reciprocable ram. Adjusting wedge assemblies, with screw drives and manually operable cranks facilitate adjustment of blade clearance, and hydraulically energized pressure pads maintain zero clearance between ram guide slides and guideway blocks therefor. Ram drive is by one or another of two hydraulic cylinders operating through a rocker shaft and linkage connected to the ram, and hydraulic clamps secure the work.
Inventors
- 👤 G Roch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:30
CPC Classifications
B; B23; B23D; B23D35/00; B23D35/005; B23D15/00; B23D15/06; Y; Y10; Y10T; Y10T83/00; Y10T83/566; Y10T83/5669; Y10T83/5787; Y10T83/5805; Y10T83/869; Y10T83/8776; Y10T83/8821; Y10T83/8828; Y10T83/8831; Y10T83/8841; Y10T83/8853; Y10T83/8867; Y10T83/8868; Y10T83/929; Y10T83/9457; Y10T83/9473; Y10T83/9483; Y10T83/9486
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
242 words
In a corner notch cutting shear assembly, the combination comprising: base means; first and second pairs of shears disposed for notching a corner in material, said first pair including first blade means and third blade means, said first blade means being secured to said base means, and said second pair including second blade means and fourth blade means, said second blade means being secured to said base means, said third blade means being closable with said first blade means for shearing sheet material along a first line, and said fourth blade means being closable with said second blade means for shearing said sheet material along a second line intersecting said first line; and blade clearance adjusting means associated with said blade means and said base means and operable to provide uniform relative movement between said first blade means and said third blade means in a direction transverse to the direction of closure of said third blade means with said first blade means to change clearance between said first and third blade means when said first and third blade means are in a closed relationship, and operable to provide a uniform relative movement between said second blade means said fourth blade means in a direction transverse to the direction of closure of said fourth blade means with said second blade means to change clearance between saId second and fourth blade means when said second and fourth blade means are in a closed relationship.
Claim 2
Dependent Claim
242 words
In a corner notch cutting shear assembly, the combination comprising: base means; first and second pairs of shears disposed for notching a corner in material, said first pair including first blade means and third blade means, said first blade means being secured to said base means, and said second pair including second blade means and fourth blade means, said second blade means being secured to said base means, said third blade means being closable with said first blade means for shearing sheet material along a first line, and said fourth blade means being closable with said second blade means for shearing said sheet material along a second line intersecting said first line; and blade clearance adjusting means associated with said blade means and said base means and operable to provide uniform relative movement between said first blade means and said third blade means in a direction transverse to the direction of closure of said third blade means with said first blade means to change clearance between said first and third blade means when said first and third blade means are in a closed relationship, and operable to provide a uniform relative movement between said second blade means said fourth blade means in a direction transverse to the direction of closure of said fourth blade means with said second blade means to change clearance between saId second and fourth blade means when said second and fourth blade means are in a closed relationship.
Claim 3
Dependent Claim
58 words
The combination of claim 1 wherein said adjusting means include: guide means on said base means; slide means on said third and fourth blade means, and slidable in said guide means to guide said third blade means during closure with said first blade means, and to guide said fourth blade means during closure with said second blade means.
Claim 4
Dependent Claim
156 words
The combination of claim 2 wherein: said slide means include a first pair of slide faces and a second pair of slide faces, and said guide means include a first pair of guide blocks engaging and guiding said first pair of slide faces, thereby establishing a first plane of movement of said third blade means during closure with said first blade means, and said guide means include a second pair of guide blocks engaging and guiding said second pair of slide faces, thereby establishing a second plane of movement of said fourth blade means during closure with said second blade means, said first pair of guide blocks being movable toward and away from said first blade means to change the blade clearance of said first pair of shears, and said second pair of guide blocks being movable toward and away from said second blade means to change the blade clearance of said second pair of shears.
Claim 5
Dependent Claim
24 words
The combination of claim 3 wherein: said slide faces and guide blocks are oriented to establish said second plane perpendicular to said first plane.
Claim 6
Dependent Claim
40 words
The combination of claim 4 wherein: said first and second blade means are affixed to said base means and meet in a corner, and said third and fourth blade means are affixed to a ram and meet in a corner.
Claim 7
Dependent Claim
78 words
The combination of claim 3 wherein: said adjusting means further include a first pair of rotary means associated with said first pair of guide blocks and operable upon rotation thereof to move said guide blocks of said first pair toward said first blade means, and a second pair of rotary means associated with said second pair of guide blocks and operable upon rotation thereof to move said guide blocks of said second pair toward said second blade means.
Claim 8
Dependent Claim
125 words
The combination of claim 6 wherein: wedge means engage each of said guide blocks, and said rotary means include gearboxes having output screws threadedly received in said wedge means and operable upon rotation to move said wedge means against their respective guide blocks; one of the rotary means of said first pair being adjacent an end of said first blade means and the other of the rotary means of said first pair being adjacent an end of said second blade means remote from said first blade means, one of the rotary means of said second pair being adjacent said one rotary means of said first pair, and the other rotary means of said second pair being adjacent the other rotary means of said first pair.
Claim 9
Dependent Claim
24 words
The combination of claim 7 wherein: each said rotary means of a pair is operable independently of the other rotary means of the pair.
Claim 10
Dependent Claim
31 words
The combination of claim 7 and further comprising: a synchronizing shaft connected between the gearboxes of said first pair of rotary means for synchronizing operation of the respective wedge means thereby.
Claim 11
Dependent Claim
48 words
The combination of claim 7 and further comprising: pin gauge mounting means secured to said base means adjacent opposite ends of said first and second blade means and having axes perpendicular to faces of said third and fourth blade means to facilitate measurement of changes in blade clearance.
Claim 12
Dependent Claim
22 words
The combination of claim 3 and further comprising: guide clearance take-up means maintaining engagement of said side faces with said guide blocks.
Claim 13
Dependent Claim
99 words
The combination of claim 11 wherein: said slide means include a third pair of slide faces facing in a direction opposite that faced by said first pair, and a fourth pair of slide faces facing in a direction opposite that fAced by said second pair, said take-up means including a first pair of pressure pads engaging said third pair of slide faces and urging them toward said slide blocks of said first pair, and a second pair of pressure pads engaging said fourth pair of slide faces and urging them toward the said slide blocks of said second pair.
Claim 14
Dependent Claim
26 words
The combination of claim 12 wherein: said take-up means include hydraulic cylinders driving said pressure pads against said slide faces of said third and fourth pair.
Claim 15
Dependent Claim
119 words
The shear assembly of claim 1 wherein said third and fourth blade means are affixed to ram means movable with respect to said base means, and said adjusting means includes: first and second parallel spaced slide members on said ram means; first and second guide means on said base means and receiving, respectively, said first and second slide members; each of said guide means including a guide surface and a take-up surface, with one of said slide members running between said surfaces, and means for moving said guide surface toward said one of said base mounted blade means for reducing clearance between said one of said base mounted blade means and said one of said ram mounted blade means.
Claim 16
Dependent Claim
44 words
The shear assembly of claim 14 wherein: each of said guide means include a screw operated wedge operable to drive said guide surface toward said third blade means, and biasing means urging said take-up surface in a direction away from said third blade means.
Claim 17
Dependent Claim
25 words
The shear assembly of claim 15 wherein: said biasing means include a fluid operated actuator forcing said take-up surface away from said third blade means.
Claim 18
Dependent Claim
14 words
The shear assembly of claim 16 wherein: said actuator is a hydraulic cylinder assembly.
Claim 19
Dependent Claim
58 words
The shear assembly of claim 17 wherein: each of said guide means includes a second guide surface and a second take-up surface, with one of said slide members running between them, and means for moving said second guide surface toward the other of said base mounted blade means for reducing blade clearance of the other pair of shears.
Claim 20
Dependent Claim
45 words
The shear assembly of claim 18 wherein: each of said guide means includes a second screw operated wedge operable to drive said second guide surfaces toward said fourth blade means, and second biasing means urging said second take-up surface away from said fourth blade means.
Claim 21
Dependent Claim
31 words
The shear assembly of claim 19 wherein: said second biasing means include a fluid operated actuator having fluid pressure thereon forcing said second take-up surface away from said fourth blade means.
Claim 22
Dependent Claim
42 words
The shear assembly of claim 14 and further comprising: a rocker member pivotally mounted on said base means, driving connector means between said rocker member and said ram means and operable, upon rocking of said member, to drive said ram means linearly.
Claim 23
Dependent Claim
66 words
The assembly of claim 21 wherein: said rocker member is a shaft which has arms projecting radially outward therefrom; said connector means include connector links connected to at least one of said arms and to said ram means; the assembly further comprising fluid powered actuator means connected between said base means and another of said arms and operable to rock said shaft about its longitudinal axis.
Claim 24
Dependent Claim
90 words
The assembly of claim 22 and further comprising: a second rocker member having a pair of arms thereon and rockable on an axis parallel to and spaced from the axis of said rocker shaft, a synchronizing link connected between one of said arms of said rocker shaft and one of said arms of said second rocker member for rocking said second rocker member in synchronism with said rocker shaft; and an additional connector link connected to another of said arms of said second rocker member and to said ram means.
Claim 25
Dependent Claim
54 words
The assembly of claim 23 wherein: the connections between said ram means and said connector links are at the corners of a triangle, one of the corners beIng adjacent an intersection of said third and fourth blade means, and the other corners being adjacent the opposite ends of said third and fourth blade means.
Claim 26
Dependent Claim
18 words
The assembly of claim 24 wherein: the connections of said arms to said connector links are swivel connections.
Claim 27
Dependent Claim
59 words
The assembly of claim 24 and further comprising: a spring loaded lock pin receivable in an aperture in said synchronizing link when said rocker member is adjacent one limit or rocking of said rocker shaft, to prevent further rocking movement thereof and thereby prevent movement of said ram means, and fluid driven actuator means for retracting said lock pin.
Claim 28
Dependent Claim
42 words
The combination of claim 1 and further comprising: material hold-down means associated with said first and second blade means and operable, when actuated on the material to be sheared, to clamp said material against portions of said first and second blade means.
Claim 29
Dependent Claim
60 words
The combination of claim 27 wherein: said first and second blade means having top surfaces thereon extending perpendicular to and away from cutting edges of said first and second blade means, said hold-down means having pressure pads immediately above said top surfaces and operable, when actuated, to clamp the said material between said pressure pads and said blade top surfaces.
Claim 30
Dependent Claim
56 words
The combination of claim 28 wherein: said hold-down means have a plurality of said pressure pads disposed in a line above the said top surfaces of said blade means, each said pressure pad having at least one hydraulically driven pad applying cylinder, and having a return spring thereon to release said pressure pad from the material.
Claim 31
Dependent Claim
96 words
In a corner notch cutting shear assembly, the combination comprising: stationary base means; a pair of shears including stationary blade means affixed to said base means, and moving blade means closable with said stationary blade means for shearing sheet material; slide means on said moving blade means; guide means on said base means and guidingly receiving said slide means thereon to guide said moving blade means during closure with said stationary blade means; and guide clearance take-up means maintaining guiding engagement of said slide means on said guide means during movement of said moving blade means.
Claim 32
Dependent Claim
96 words
In a corner notch cutting shear assembly, the combination comprising: stationary base means; a pair of shears including stationary blade means affixed to said base means, and moving blade means closable with said stationary blade means for shearing sheet material; slide means on said moving blade means; guide means on said base means and guidingly receiving said slide means thereon to guide said moving blade means during closure with said stationary blade means; and guide clearance take-up means maintaining guiding engagement of said slide means on said guide means during movement of said moving blade means.
Claim 33
Dependent Claim
15 words
The combination of claim 30 wherein: said take-up means include fluid powered and pressurized actuators.
Claim 34
Dependent Claim
13 words
The combination of claim 31 wherein: said fluid powered actuators are hydraulic cylinders.
Claim 35
Dependent Claim
63 words
The combination of claim 32 wherein: said slide means include a pair of spaced slide blocks having faces facing in one direction; said guide means include a pair of spaced guide blocks having faces engaging said slide block faces; and said take-up means include take-up blocks having faces engaging said slide blocks and urging them in said one direction, against said guide blocks.
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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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |