US3762655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shearing mechanism
Assignee: GARBALIZER CORP
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Filing: 1972-01-03
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Granted: 1973-10-02
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Expires: 1992-01-03
Abstract
Abstract Improved, shaft driven, shearing structure having shear pin means so positioned as to minimize down-time servicing, and expense of maintenance in the event of shear overload. Specifically, a shaft is provided with a hub mounting a blade structure thereto. The blade structure, hub and shaft are provided with mutually aligned apertures to constitute a through bore dimensioned to receive a shear pin structure at at least one and preferably both extremities. In the event of shear pin breakage, the affected shear pin or pins may be removed and subsequent ones installed, with such subsequent ones thrusting pieces of former pin centrally such that the through bore at the shaft area will store these pieces. After usage of subsequently emplaced shear pins in multiple numbers, then the broken shear pin pieces may be removed simply by a punch out or press out operation. Adjustment structure is likewise provided for appropriate bearing wear monitoring and replacement.
Inventors
- 👤 J Brewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:49
CPC Classifications
B; B02; B02C; B02C23/00; B02C23/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
84 words
A shearing mechanism including, in combination, a shaft having a longitudinal axis of revolvement, a hub annularly disposed upon and keyed to said shaft, said hub including an annular groove, shearing blade means mounted upon said hub and seated at said groove, said blade, hub and shaft having mutually aligned apertures forming a continuous through-bore disposed transversely with respect to said axis of said shaft, and shear pin means disposed through said shearing blade means and penetrating said hub radially inwardly of said groove.
Claim 2
Dependent Claim
84 words
A shearing mechanism including, in combination, a shaft having a longitudinal axis of revolvement, a hub annularly disposed upon and keyed to said shaft, said hub including an annular groove, shearing blade means mounted upon said hub and seated at said groove, said blade, hub and shaft having mutually aligned apertures forming a continuous through-bore disposed transversely with respect to said axis of said shaft, and shear pin means disposed through said shearing blade means and penetrating said hub radially inwardly of said groove.
Claim 3
Dependent Claim
25 words
Structure according to claim 1 wherein said shear pin includes an annular groove disposed proximate the juncture of said shearing blade means and said hub.
Claim 4
Dependent Claim
28 words
Structure according to claim 1 wherein said shearing mechanism includes a second shear pin diametrically opposed to said shear pin means and positioned also within said through bore.
Claim 5
Dependent Claim
38 words
Structure according to claim 1 wherein said shear pin means includes a head, an enlarged threaded shank, and a shear pin portion, said shearing blade means including an enlarged threaded counter-bore area threadedly receiving said threaded shank thereat.
Claim 6
Dependent Claim
45 words
Structure according to claim 1 wherein said hub comprises a pair of hub-halves, and bolt means joining said hub-halves together, said hub-halves having aligned bearing grooves having upstanding bearing end abutments, and bearing-halves mounted in said grooves and having their ends positioned against said abutments.
Claim 7
Dependent Claim
122 words
A shearing mechanism including, in combination, a shaft having a longitudinal axis of revolvement, a hub annularly disposed upon and keyed to said shaft, said hub including an annular peripheral groove, shearing blade means mounted upon said hub and seated in said groove, said shearing blade means being of opposite-half construction having mutually congruent opposite halves, and bolt means securing together said opposite halves; bearing means disposed between said opposite halves and seated in said groove, said shaft, hub and blade means having mutually aligned apertures comprising a through bore disposed transversely with respect to said shaft axis, and shear pin means disposed transversely with respect to said axis of said shaft, through said through bore as defined by said aligned apertures.
Claim 8
Dependent Claim
122 words
A shearing mechanism including, in combination, a shaft having a longitudinal axis of revolvement, a hub annularly disposed upon and keyed to said shaft, said hub including an annular peripheral groove, shearing blade means mounted upon said hub and seated in said groove, said shearing blade means being of opposite-half construction having mutually congruent opposite halves, and bolt means securing together said opposite halves; bearing means disposed between said opposite halves and seated in said groove, said shaft, hub and blade means having mutually aligned apertures comprising a through bore disposed transversely with respect to said shaft axis, and shear pin means disposed transversely with respect to said axis of said shaft, through said through bore as defined by said aligned apertures.
Claim 9
Dependent Claim
76 words
In combination, a rotatable shaft, revolvement structure disposed upon said shaft, circumscribing the same, said revolvement structure and said shaft including aligned, transverse apertures comprising a through-bore disposed completely through the combination of said revolvement structUre and shaft, shear pin means disposed in said through-bore for releasably keying the revolvement of said revolvement structure with the rotation of said shaft, said pin means being threaded into said revolvement structure and being constructed for radial withdrawal therefrom.
Claim 10
Dependent Claim
76 words
In combination, a rotatable shaft, revolvement structure disposed upon said shaft, circumscribing the same, said revolvement structure and said shaft including aligned, transverse apertures comprising a through-bore disposed completely through the combination of said revolvement structUre and shaft, shear pin means disposed in said through-bore for releasably keying the revolvement of said revolvement structure with the rotation of said shaft, said pin means being threaded into said revolvement structure and being constructed for radial withdrawal therefrom.
Claim 11
Dependent Claim
109 words
A shearing mechanism including, in combination, a split shearing blade construction comprising opposite, mutually spaced halves, a journal including a base provided with mutually spaced, aligned bushing grooves, a shaft disposed interior of and keyed for mutual revolvement to said base, bushing segments mounted in said bushing grooves and dimensioned to be held thereby against rotative displacement, said shearing blade construction being mounted upon said bushing segments, said split shearing blade construction being constructed and dimensioned with said bushing segments such that the mutual spacing between said halves of said shearing blade construction closes home at that point at which said bushing segments are worn sufficiently to invite replacement.
Claim 12
Dependent Claim
109 words
A shearing mechanism including, in combination, a split shearing blade construction comprising opposite, mutually spaced halves, a journal including a base provided with mutually spaced, aligned bushing grooves, a shaft disposed interior of and keyed for mutual revolvement to said base, bushing segments mounted in said bushing grooves and dimensioned to be held thereby against rotative displacement, said shearing blade construction being mounted upon said bushing segments, said split shearing blade construction being constructed and dimensioned with said bushing segments such that the mutual spacing between said halves of said shearing blade construction closes home at that point at which said bushing segments are worn sufficiently to invite replacement.
Claim 13
Dependent Claim
44 words
Structure according to claim 8 wherein said base, bushing segments, shaft, and revolvement structure are provided with aligned apertures comprising a through-bore constituting shear pin means receiving bore and shear pin means, broken-point storage cavity, and shear pin means operably disposed in said through-bore.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |