US3733885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic press brake back gauge
Assignee: Individual
•
Filing: 1971-04-19
•
Granted: 1973-05-22
•
Expires: 1991-04-19
Abstract
Abstract A back gauge for a press brake having a stop assembly controlled by an indexing roller. The stop assembly is positioned adjacent a press brake die and punch by a pneumatic cylinder actuated in response to the position of the press brake ram. The indexing roller controls the positioning of the stop member at preselected distances from the press brake die to control the position of a work piece on the press brake die.
Inventors
- 👤 E Brauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:22
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/02
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
202 words
A back gauge mechanism for a press brake having a stop member automatically positioned in response to the rise and fall of the ram and punch of the press brake to provide an abutment against which a work piece placed on the press brake die can be positioned, said back gauge comprising: a. apparatus carried adjacent the die of the press brake for supporting the back gauge; b. a guide mechanism carried by said apparatus for movement toward and away from the press brake die; c. means carried by said apparatus and connected with said guide mechanism actuated in response to the rise and fall of the press brake punch to cause said guide mechanism to perform said movement; d. a stop member carried on said guide mechanism and positioned by said guide mechanism adjacent the press brake die to form an abutment for a work piece inserted over the die; e. positioning means carried by said apparatus and coacting with said guide mechanism in response to movement of the guide mechanism to position said guide mechanism and said stop member varying predetermined distances from the press brake die to provide a variable abutment against which the work piece can be positioned.
Claim 2
Dependent Claim
202 words
A back gauge mechanism for a press brake having a stop member automatically positioned in response to the rise and fall of the ram and punch of the press brake to provide an abutment against which a work piece placed on the press brake die can be positioned, said back gauge comprising: a. apparatus carried adjacent the die of the press brake for supporting the back gauge; b. a guide mechanism carried by said apparatus for movement toward and away from the press brake die; c. means carried by said apparatus and connected with said guide mechanism actuated in response to the rise and fall of the press brake punch to cause said guide mechanism to perform said movement; d. a stop member carried on said guide mechanism and positioned by said guide mechanism adjacent the press brake die to form an abutment for a work piece inserted over the die; e. positioning means carried by said apparatus and coacting with said guide mechanism in response to movement of the guide mechanism to position said guide mechanism and said stop member varying predetermined distances from the press brake die to provide a variable abutment against which the work piece can be positioned.
Claim 3
Dependent Claim
39 words
The back gauge mechanism of claim 1 wherein said apparatus comprises main support beams carried adjacent the press brake and extending transversely thereto and cross support beams carried on the main support beams laterally to the press brake die.
Claim 4
Dependent Claim
38 words
The back gauge mechanism of claim 2 wherein said connection between the main support beams and cross support beams is adjustable to permit the cross support beams to be positioned toward or away from the press brake die.
Claim 5
Dependent Claim
61 words
The back gauge mechanism of claim 1 wherein said apparatus comprises main support beams positioned transversely to the press brake and cross support beams adjustably carried on the main support beams and a main support plate positioned transversely to the press brake die and adjustably carried on the cross support beams for lateral adjustment with respect to the press brake die.
Claim 6
Dependent Claim
32 words
The back gauge mechanism of claim 1 wherein said apparatus includes means for adjustably, laterally and transversely positioning said guide means and said positioning means with respect to the press brake die.
Claim 7
Dependent Claim
47 words
The back gauge mechanism of claim 1 wherein said means connected with said guide mechanism comprises a pneumatic cylinder having a piston rod connected to said guide mechanism to move said guide mechanism in response to the rise and fall of the press brake ram and punch.
Claim 8
Dependent Claim
42 words
The back gauge mechanism of claim 1 wherein said guide mechanism comprises guide rails carried by said apparatus transversely to the press brake die and a guide plate slidable on said guide rails, the stop member being carried on the guide plate.
Claim 9
Dependent Claim
27 words
The back gauge mechanism of claim 7 wherein said means carried by said apparatus includes a pneumatic cylinder having a piston rod connected to said guide plate.
Claim 10
Dependent Claim
36 words
The back gauge mechanism of claim 7 wherein the guide plate carries a camming mechanism which actuates said positioning means to limit movement of said guide plate and said stop member toward the press brake die.
Claim 11
Dependent Claim
42 words
The back gauge mechanism of claim 1 wherein said positioning means comprises an indexing roller freely rotatably carried on said apparatus and actuated by the movement of said guide mechanism to position the guide mechanism varying distances from the press brake die.
Claim 12
Dependent Claim
58 words
The back gauge mechanism of claim 10 wherein said indexing roller comprises an elongated cylindrical member having a plurality of radial grooves extending longitudinally of the roller, and abutment means carried in said grooves vaRying distances longitudinally on said roller to coact with said guide mechanism to position said guide mechanism with respect to the press brake die.
Claim 13
Dependent Claim
47 words
The back gauge mechanism defined in claim 10 wherein said indexing roller contains cam means and said guide mechanism contains a cam roller cooperating with said cam means to index said roller on each movement of said guide mechanism toward and away from the press brake die.
Claim 14
Dependent Claim
57 words
The back gauge mechanism of claim 12 wherein said indexing roller contains longitudinally extending grooves and camming means coacting with said grooves and said guide mechanism contains a cam roller coacting with said grooves and said camming means to index said roller on each movement of said guide mechanism toward and away from said press brake die.
Claim 15
Dependent Claim
135 words
In a back gauge assembly for a press brake having a mechanism providing an abutment against which a work piece is placed, an indexing apparatus to control the position of the mechanism with respect to the press brake die comprising: a. a cylindrical member supported for free rotation and having a plurality of radial longitudinally extending grooves adapted to coact with the abutment mechanism; b. said grooves terminating adjacent one end of said cylindrical member in a radial recess and providing a first camming surface; c. and a shoulder on said one end of said cylindrical member providing a second camming surface; d. said first and said second camming surfaces being adapted to coact with the abutment mechanism to rotate said cylindrical member and position the abutment mechanism with respect to the press brake die.
Claim 16
Dependent Claim
135 words
In a back gauge assembly for a press brake having a mechanism providing an abutment against which a work piece is placed, an indexing apparatus to control the position of the mechanism with respect to the press brake die comprising: a. a cylindrical member supported for free rotation and having a plurality of radial longitudinally extending grooves adapted to coact with the abutment mechanism; b. said grooves terminating adjacent one end of said cylindrical member in a radial recess and providing a first camming surface; c. and a shoulder on said one end of said cylindrical member providing a second camming surface; d. said first and said second camming surfaces being adapted to coact with the abutment mechanism to rotate said cylindrical member and position the abutment mechanism with respect to the press brake die.
Claim 17
Dependent Claim
47 words
The back gauge assembly of claim 14 wherein the first camming surface comprises a shoulder on the end portion of each of said grooves intersecting said radial recess and said second camming surface comprises recesses in said cylindrical member shoulder radially offset from said first camming surface.
Claim 18
Dependent Claim
38 words
The back gauge assembly of claim 15 wherein the second camming surface includes an arcuate bottom cam surface having a radius drawn on a center line beyond the intersection of said first camming surface with said radial recess.
Claim 19
Dependent Claim
125 words
A back gauge assembly for a press brake having a punch and die, said back gauge comprising: a. apparatus for supporting said back gauge adjacent the press brake die; b. abutment means supported on said apparatus for free movement toward and away from the press brake die; c. means for moving said abutment means toward and away from the press brake die; d. control means carried by said apparatus actuated by the abutment means during said movement toward and away from the press brake die; e. said control means including means limiting the movement of said abutment means toward said die to preselected distances from the die to provide a variably positioned abutment adjacent the press brake die against which a work piece is placed.
Claim 20
Dependent Claim
125 words
A back gauge assembly for a press brake having a punch and die, said back gauge comprising: a. apparatus for supporting said back gauge adjacent the press brake die; b. abutment means supported on said apparatus for free movement toward and away from the press brake die; c. means for moving said abutment means toward and away from the press brake die; d. control means carried by said apparatus actuated by the abutment means during said movement toward and away from the press brake die; e. said control means including means limiting the movement of said abutment means toward said die to preselected distances from the die to provide a variably positioned abutment adjacent the press brake die against which a work piece is placed.
Claim 21
Dependent Claim
37 words
A back gauge assembly of the type defined in claim 17 wherein said abutment means includes means coacting with said control means to cause actuation of the control means for limiting said movement of said abutment means.
Claim 22
Dependent Claim
50 words
A back gauge assembly of the type defined in claim 18 wherein said control means comprises an indexing roller mounted on said apparatus for rotational movement and said roller having radial longitudinally extending grooves coacting with said abutment means during said movement toward and away from the press brake die.
Claim 23
Dependent Claim
36 words
A back gauge assembly of the type defined in claim 19 wherein stops are positioned at varying distances along the longitudinally extending grooves to limit the movement of said abutment means toward the press brake die.
Claim 24
Dependent Claim
40 words
A back gauge assembly of the type defined in claim 20 wherein said mounting of said roller includes a shock absorbing assembly to absorb the longitudinal load on the indexing roller upon said stops limiting movement of said abutment means.
Claim 25
Dependent Claim
36 words
A back gauge assembly of the type defined in claIm 21 wherein said shock absorbing assembly is carried on said indexing roller mounting and reacts against said apparatus to absorb longitudinally directed loads on said roller.
Claim 26
Dependent Claim
46 words
A back gauge assembly of the type defined in claim 17 wherein said abutment means includes guide rails carried on said apparatus transverse to the press brake and a guide plate freely slidable on said guide rails for movement toward and away from the press brake.
Claim 27
Dependent Claim
25 words
A back gauge assembly of the type defined in claim 23 wherein the guide plate carries stop buttons against which a work piece is placed.
Claim 28
Dependent Claim
22 words
A back gauge assembly of the type defined in claim 24 wherein the stop buttons are vertically adjustable on the guide plate.
Claim 29
Dependent Claim
22 words
A back gauge assembly of the type defined in claim 25 wherein the stop buttons are horizontally adjustable on the guide plate.
Claim 30
Dependent Claim
39 words
The back gauge mechanism of claim 13 wherein said indexing roller includes valve actuating means and a valve mechanism controlled by said valve actuating mechanism to control said means carried by said apparatus to skip index said indexing roller.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |