Patent US3750772A successfully refreshed from Google Patents.
US3750772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary cutters
Assignee: McDonnell P Ltd
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Filing: 1971-12-27
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Granted: 1973-08-07
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Expires: 1991-12-27
Abstract
Abstract The invention provides for means for mounting a rotary cutter so that the cutter is reclaimable or more easily reclaimable than hitherto known to the applicant. By this means the journal and load pin rotatably supporting the cutter is made in one. Furthermore there is provided in a saddle supporting the journal, an angular notch to restrain the journal against rotation. Still further, there is provided a saddle to support the journal, the saddle having a detachable limb having an angular notch to restrain the journal against rotation.
Inventors
- 👤 P Venter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:56
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
Mounting means for mounting a rotary cutter having a bore, the mounting means including a saddle having at least one limb in which is provided an angular notch in which is receivable an end of a journal on which the cutter may be rotatably mounted the end of the journal being of a complementary angular cross-section so that the journal is restrained against rotation, aligned apertures being provided through the saddle and the angular journal end to receive a tie-bolt for clamping the angular journal end in the notch, there being provided a slot in the saddle limb having the notch and leading out of the notch to permit deformation of the saddle limb having the notch during clamping of the angular journal end in the notch.
Claim 2
Dependent Claim
127 words
Mounting means for mounting a rotary cutter having a bore, the mounting means including a saddle having at least one limb in which is provided an angular notch in which is receivable an end of a journal on which the cutter may be rotatably mounted the end of the journal being of a complementary angular cross-section so that the journal is restrained against rotation, aligned apertures being provided through the saddle and the angular journal end to receive a tie-bolt for clamping the angular journal end in the notch, there being provided a slot in the saddle limb having the notch and leading out of the notch to permit deformation of the saddle limb having the notch during clamping of the angular journal end in the notch.
Claim 3
Dependent Claim
40 words
Mounting means according to claim 1 in which the notch is rectangular in cross-section and in which the mounting means includes a flat wearing pad to line at least that part of the notch along which the journal is supported.
Claim 4
Dependent Claim
32 words
Mounting means according to claim 1, in which the saddle has two limbs each limb being provided with an angular notch in which to receive a journal end having a complementary cross-section.
Claim 5
Dependent Claim
122 words
Mounting means for mounting a rotary cutter having a bore, the mounting means including a saddle having at least one detachable limb having an angular notch in which an end of a journal is receivable for rotatably mounting the cutter, the end of the journal being of a complementary angular cross-section so that the journal is restrained against rotation, aligned apertures being provided through the saddle and the angular journal end to receive a tie-bolt for clamping the angular journal end in the notch, there being provided a slot in the saddle limb having the notch and leading out of the notch to permit deformation of the saddle limb having the notch during clamping of the angular journal end in the notch.
Claim 6
Dependent Claim
122 words
Mounting means for mounting a rotary cutter having a bore, the mounting means including a saddle having at least one detachable limb having an angular notch in which an end of a journal is receivable for rotatably mounting the cutter, the end of the journal being of a complementary angular cross-section so that the journal is restrained against rotation, aligned apertures being provided through the saddle and the angular journal end to receive a tie-bolt for clamping the angular journal end in the notch, there being provided a slot in the saddle limb having the notch and leading out of the notch to permit deformation of the saddle limb having the notch during clamping of the angular journal end in the notch.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |