Patent US2336224A successfully refreshed from Google Patents.
Patent US3656220A successfully refreshed from Google Patents.
US3656220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indexable broach
Assignee: Carmet Co
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Filing: 1970-01-02
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Granted: 1972-04-18
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Expires: 1990-01-02
Abstract
Abstract Apparatus for broaching planar or contoured surfaces with a broaching tool having a plurality of preferably indexable and reversible cutting inserts supported by individual tool holders superimposed on a broaching block in a substantially exposed relationship to the broaching block. In preferred embodiments the broaching block contains gauging means adapted to engage a cooperating portion of the tool holder whereby the holder may be rapidly positioned and forces of broaching may be transferred from the tool holder supporting the cutting inserts to the broaching blocks. A further embodiment includes the broaching block and tool holder adapted with a keyway to engage a complementarily shaped projection to enhance the rapid positioning of the mounting block and increase the locating force upon the insert which secures it in position.
Inventors
- 👤 Hubert J Dupuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:51
CPC Classifications
B; B23; B23D; B23D43/00; B23D43/02; B23D43/04; Y; Y10; Y10T; Y10T407/00; Y10T407/16; Y10T407/1628; Y10T407/1657; Y10T407/22; Y10T407/2272; Y10T407/2274; Y10T407/2276
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
161 words
Apparatus for broaching comprising a broaching block, a reversible and indexable cutting tool having a bore extending therethrough and having sides disposed between reversible cutting edges for each index position, a tool holder for said cutting tool superimposed on the outer surface of said broaching block and projecting therefrom, a locating post projecting from said tool holder at an angle to said surface and through said bore in the cutting tool for positioning the tool on said holder at an inclination to said surface, and means detachably securing said tool holder to the broaching block, the broaching block being provided with a transverse shoulder forming gauging means engaging the end of the tool holder opposite said post to position the holder on the block, and the broaching block also being provided with a transverse gauging recess having a wall with an edge engaging the cutting tool along a side between inactive cutting edges adjacent the broaching block to protect those edges.
Claim 2
Dependent Claim
161 words
Apparatus for broaching comprising a broaching block, a reversible and indexable cutting tool having a bore extending therethrough and having sides disposed between reversible cutting edges for each index position, a tool holder for said cutting tool superimposed on the outer surface of said broaching block and projecting therefrom, a locating post projecting from said tool holder at an angle to said surface and through said bore in the cutting tool for positioning the tool on said holder at an inclination to said surface, and means detachably securing said tool holder to the broaching block, the broaching block being provided with a transverse shoulder forming gauging means engaging the end of the tool holder opposite said post to position the holder on the block, and the broaching block also being provided with a transverse gauging recess having a wall with an edge engaging the cutting tool along a side between inactive cutting edges adjacent the broaching block to protect those edges.
Claim 3
Dependent Claim
56 words
A broaching tool according to claim 1 wherein said bore in the cutting tool is centrally located in said cutting tool, such that the cuTting tool cutting edges are symmetrically located about said locating post, whereby rotation of said cutting tool about said locating post will index a subsequent cutting edge into a predetermined cutting position.
Claim 4
Dependent Claim
59 words
A broaching tool according to claim 2 wherein said means to detachably secure said tool holder to said broaching block is disposed intermediate said tool holder gauging means and said cutting tool gauging means, whereby said cutting tool cooperates with said gauging means and securing means to rigidly support said tool in said tool holder on said broaching block.
Claim 5
Dependent Claim
66 words
A broaching tool according to claim 3 wherein the top surface of said broaching block is planar and adapted to have a plurality of tool holders and cutting tools in a transverse row thereon, whereby a pass of the broaching tool affects a removal of material from a workpiece over a width substantially larger than the width of a single cutting edge of said cutting tools.
Claim 6
Dependent Claim
76 words
A broaching tool according to claim 4 wherein said broaching block is adapted to contain a plurality of tool holders and cutting tools thereon in a plurality of transverse rows, the tool holders of each row having a space therebetween no larger than the width of a cutting edge and that the tool holders and cutting tools of successive rows are affixed to said broaching block substantially in line with the spaces of the preceding row.
Claim 7
Dependent Claim
77 words
A broaching tool according to claim 2 wherein said broaching block is a section of a polyhedron and is adapted to have a plurality of mounting blocks and cutting tools in a transverse planar row on the faces of said polyhedron whereby a pass of the broaching tool affects a removal of material from a workpiece over a width substantially larger than the width of a single cutting edge, which removal of material is concave in cross-section.
Claim 8
Dependent Claim
80 words
A broaching tool according to claim 6 wherein the broaching block is adapted to contain a plurality of tool holders and cutting tools in a plurality of transverse planar rows, the tool holders of each row having a space therebetween no larger than the width of the cutting edge of said cutting tool and that the tool holders and cutting tools of successive rows are affixed to said broaching block, substantially in line with the spaces of the preceding row.
Claim 9
Dependent Claim
51 words
A broaching tool according to claim 7 wherein the cross-section of said polyhedral section increases in the direction of successive rows of tool holders, such that successive rows of said cutting tools are positioned to remove additional broached material from a workpiece with respect to said first row of cutting tools.
Claim 10
Dependent Claim
77 words
A broaching tool according to claim 4 wherein the top surface of said broaching block is adapted to have a plurality of mounting blocks and cutting tools in a single transverse row, the adjacent cutting tools abutting so as to form a single cutting edge whereby a pass of the broaching block and cutting edges of the tools affects a single removal of material over a width substantially larger than the width of a single cutting edge.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |