US3707303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for securing an insert to a base piece
Assignee: Petri-Johnson Inc
•
Filing: 1971-03-10
•
Granted: 1972-12-26
•
Expires: 1991-03-10
Abstract
Abstract Means for removably securing an insert element to a larger base piece. The invention as disclosed solves the problem of securing an insert element such as a punch to a larger base piece such as a punch ring. The invention is particularly applicable to a rotary punch of the type having a rotating punch ring with punch elements removably secured around the periphery of said ring. In lieu of the usual set screw method of securing the punches to the punch ring quick releasable means is provided for fixedly but removably securing the shank of a punch or the like within a bore in the punch ring. The cross sectional contour of the shank or the bore is formed so that the shank engages the bore at two points in cross section. The shank is forced against said two points by means of a spring pressed ball so that the insert is urged simultaneously against the bottom of the bore and against the two points. The ''''three point support'''' thus achieved insures not only optimum stability of the insert with respect to the punch ring but also permits extremely accurate positioning of the punch relative to the punch ring.
Inventors
- 👤 Nello J Petri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:59
CPC Classifications
F; F16; F16B; F16B21/00; F16B21/10; F16B21/16; F16B21/165; F16B2200/00; F16B2200/10; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17128; Y10T279/17171; Y10T279/17188; Y10T279/17196; Y10T403/00; Y10T403/60; Y10T403/602; Y10T403/604
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
226 words
In the combination that includes a base piece and an element secured thereto: said base piece being formed with a bore opening outwardly of one face thereof, said element including a shank adapted to be received in said bore through the open end thereof, spring urged force means on one side of said bore urging said shank transversely of said bore toward the opposite side thereof, said shank and bore being formed in cross section to provide two spaced points of engagement between said shank and said bore at said opposite side, the cross sectional contour of said shank being smaller than the cross sectional contour of said bore to provide clearance therebetween whereby the periphery of said shank is engaged only by said force means and said bore at said two points to provide stability of said element relative to said base piece, said bore being provided with a bottom rigid with said base piece and said shank being provided with a camming surface acted upon by said spring urged force means to urge said shank against said bottom at the same time it is urged toward said oppoSite side, said bore and shank being circular in cross section and said bore being enlarged at the side opposite said force means to provide a pair of junctures at said points extending axially of said bore.
Claim 2
Dependent Claim
226 words
In the combination that includes a base piece and an element secured thereto: said base piece being formed with a bore opening outwardly of one face thereof, said element including a shank adapted to be received in said bore through the open end thereof, spring urged force means on one side of said bore urging said shank transversely of said bore toward the opposite side thereof, said shank and bore being formed in cross section to provide two spaced points of engagement between said shank and said bore at said opposite side, the cross sectional contour of said shank being smaller than the cross sectional contour of said bore to provide clearance therebetween whereby the periphery of said shank is engaged only by said force means and said bore at said two points to provide stability of said element relative to said base piece, said bore being provided with a bottom rigid with said base piece and said shank being provided with a camming surface acted upon by said spring urged force means to urge said shank against said bottom at the same time it is urged toward said oppoSite side, said bore and shank being circular in cross section and said bore being enlarged at the side opposite said force means to provide a pair of junctures at said points extending axially of said bore.
Claim 3
Dependent Claim
227 words
In the combination that includes a base piece and an element secured thereto: said base piece being formed with a bore opening outwardly of one face thereof, said element including a shank adapted to be received in said bore through the open end thereof, spring urged force means on one side of said bore urging said shank transversely of said bore toward the opposite side thereof, said shank and bore being formed in cross section to provide two spaced points of engagement between said shank and said bore at said opposite side, the cross sectional contour of said shank being smaller than the cross sectional contour of said bore to provide clearance therebetween whereby the periphery of said shank is engaged only by said force means and said bore at said two points to provide stability of said element relative to said base piece, said bore being provided with a bottom rigid with said base piece and said shank being provided with a camming surface acted upon by said spring urged force means to urge said shank against said bottom at the same time it is urged toward said opposite side, the radius of said bore being less than the distance from the center of the bore to another face of said base piece whereby the bore intersects said other face to provide said points of engagement.
Claim 4
Dependent Claim
227 words
In the combination that includes a base piece and an element secured thereto: said base piece being formed with a bore opening outwardly of one face thereof, said element including a shank adapted to be received in said bore through the open end thereof, spring urged force means on one side of said bore urging said shank transversely of said bore toward the opposite side thereof, said shank and bore being formed in cross section to provide two spaced points of engagement between said shank and said bore at said opposite side, the cross sectional contour of said shank being smaller than the cross sectional contour of said bore to provide clearance therebetween whereby the periphery of said shank is engaged only by said force means and said bore at said two points to provide stability of said element relative to said base piece, said bore being provided with a bottom rigid with said base piece and said shank being provided with a camming surface acted upon by said spring urged force means to urge said shank against said bottom at the same time it is urged toward said opposite side, the radius of said bore being less than the distance from the center of the bore to another face of said base piece whereby the bore intersects said other face to provide said points of engagement.
Claim 5
Dependent Claim
238 words
In the combination that includes a base piece and an element secured thereto: said base piece being formed with a bore opening outwardly of one face thereof, said element including shank adapted to be received in said bore through the open end thereof, spring urged force means having a substantially spherical camming surface on one side of said bore urging said shank transversely of said bore toward the opposite side thereof, said shank and bore being formed in cross section to provide two spaced points of engagement between said shank and said bore at said opposite side, the cross sectional contour of said shank being smaller than the cross sectional contour of said bore to provide clearance therebetween whereby the periphery of said shank is engaged only by said force means and said bore at said two points to provide stability of said element relative to said base piece, said bore being provided with a bottom rigid with said base piece and said shank being provided with an angled camming surface acted upon by said spring urged force means to urge said shank against said bottom at the same time it is urged against said opposite side, said camming surface being formed at such an angle so as to provide a component of the force of said force means urging said shank against said opposite side which is greater than the component urging said shank against said bottom.
Claim 6
Dependent Claim
238 words
In the combination that includes a base piece and an element secured thereto: said base piece being formed with a bore opening outwardly of one face thereof, said element including shank adapted to be received in said bore through the open end thereof, spring urged force means having a substantially spherical camming surface on one side of said bore urging said shank transversely of said bore toward the opposite side thereof, said shank and bore being formed in cross section to provide two spaced points of engagement between said shank and said bore at said opposite side, the cross sectional contour of said shank being smaller than the cross sectional contour of said bore to provide clearance therebetween whereby the periphery of said shank is engaged only by said force means and said bore at said two points to provide stability of said element relative to said base piece, said bore being provided with a bottom rigid with said base piece and said shank being provided with an angled camming surface acted upon by said spring urged force means to urge said shank against said bottom at the same time it is urged against said opposite side, said camming surface being formed at such an angle so as to provide a component of the force of said force means urging said shank against said opposite side which is greater than the component urging said shank against said bottom.
References Cited (Backward Citations)
US662996A
Cited
US1647802A
Cited
US2167014A
Cited
US2416285A
Cited
US2431566A
Cited
US2437740A
Cited
US3036839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |