US3757621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guillotines and like shearing machines
Assignee: Intermenua Pty Ltd
•
Filing: 1971-02-17
•
Granted: 1973-09-11
•
Expires: 1991-02-17
Abstract
Abstract A guillotine machine for shearing metal, power driven or hand operated, including a yieldable supporting element located in a resting position adjacent the loading edge of the first blade in the path of the second blade and a biasing mechanism acting to resist displacement of the support from its resting position as the second blade is advanced over the first blade so that the material cut by the machine is maintained in a flat and untwisted condition requiring no straightening operation.
Inventors
- 👤 E Breetvelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:14
CPC Classifications
B; B23; B23D; B23D15/00; B23D15/04; B23D17/00; B23D17/02; B23D17/08; B23D33/00; B23D33/02; B23D33/025; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2198; Y10T83/929; Y10T83/9411; Y10T83/9447
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
A shearing machine including a first fixed blade and a second blade movable over the first blade to set up a shearing action along their leading edges, a continuous yieldable work supoort comprising a resilient member which is located in a resting position adjacent and along substantially the length of the leading edge of the first fixed blade in the path of the second blade and biasing means acting to resist displacement of the resilient member from its resting position as the second blade is advanced over the first blade.
Claim 2
Dependent Claim
90 words
A shearing machine including a first fixed blade and a second blade movable over the first blade to set up a shearing action along their leading edges, a continuous yieldable work supoort comprising a resilient member which is located in a resting position adjacent and along substantially the length of the leading edge of the first fixed blade in the path of the second blade and biasing means acting to resist displacement of the resilient member from its resting position as the second blade is advanced over the first blade.
Claim 3
Dependent Claim
17 words
A shearing machine as claimed in claim 1 in which the resilient member comprises a leaf spring.
Claim 4
Dependent Claim
21 words
A shearing machine as claimed in claim 1 in which the biasing means comprises at least one resiliently loaded base member.
Claim 5
Dependent Claim
98 words
A shearing machine including a first fixed blade and a second blade movable over the first blade to set up a shearing action along their leading edges, a continuous yieldable work support comprising a leaf spring located in a resting position adjacent to and along substantially the length of the leading edge of the first blade in the path of the second blade and biasing means comprising at least one resiliently loaded base member, which is adapted to resist displacement of the leaf spring from its resting position as the second blade is advanced over the first blade.
Claim 6
Dependent Claim
98 words
A shearing machine including a first fixed blade and a second blade movable over the first blade to set up a shearing action along their leading edges, a continuous yieldable work support comprising a leaf spring located in a resting position adjacent to and along substantially the length of the leading edge of the first blade in the path of the second blade and biasing means comprising at least one resiliently loaded base member, which is adapted to resist displacement of the leaf spring from its resting position as the second blade is advanced over the first blade.
Claim 7
Dependent Claim
50 words
A shearing machine as claimed in claim 4 in which the leaf spring is bowed and supported in the region of its extremities on a single resiliently loaded base member, the leaf spring having its convex surface facing the second blade and providing the supporting surface of the work support.
Claim 8
Dependent Claim
32 words
A shearing machine as claimed in claim 5 in which further loading means is provided which is adapted to draw the leaf spring into a substantially flat position on the base member.
Claim 9
Dependent Claim
31 words
A shearing machine as claimed in claim 6 in which the leaf spring is constrained to said substantially flat position by a bracket adjustably and pivotally attached to the fixed blade.
Claim 10
Dependent Claim
41 words
A shearing machine as claimed in claim 7 in which the base member is carried between resilient end mountings, one such end mounting being attached to the fixed blade and the other such end mounting being attached to the movable blade.
References Cited (Backward Citations)
US294966A
Cited
US1000789A
Cited
US2814343A
Cited
US2742087A
Cited
US2973678A
Cited
US3600995A
Cited
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 |