US3828487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinder attachment for a lathe
Assignee: Ammco Tools Inc
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Filing: 1972-12-01
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Granted: 1974-08-13
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Expires: 1992-12-01
Abstract
Abstract A precision finishing tool for use in turning brake drums incorporates a plurality of different length quills and means for interchanging the quills for use with different sizes of rotors.
Inventors
- 👤 W Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:14
CPC Classifications
B; B24; B24B; B24B27/00; B24B19/00; B24B19/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
177 words
A grinder attachment for a lathe, comprising a power head including a housing and a motor, a drive spindle journaled in said housing and connected to be driven by said motor, said housing having an open socket into which one end of said spindle extends, a quill assembly including a tubular body member and a driven spindle for carrying a grinding wheel journaled in one end of said body member, the other end of said body member being removably and tightly securable to said housing around one end of said drive spindle, a tubular drive shaft disposed in said tubular member in alignment with said spindles and with the ends of said drive shaft respectively connected to said spindles, said spindles providing the sole support for the respective ends of said drive shaft, said driven spindle having an enlarged intermediate portion disposed within the foreward end portion of said tubular body member, and first and second bearing means respectively mounted at opposite ends of said enlarged portion for journaling said driven spindle in said tubular body member.
Claim 2
Dependent Claim
177 words
A grinder attachment for a lathe, comprising a power head including a housing and a motor, a drive spindle journaled in said housing and connected to be driven by said motor, said housing having an open socket into which one end of said spindle extends, a quill assembly including a tubular body member and a driven spindle for carrying a grinding wheel journaled in one end of said body member, the other end of said body member being removably and tightly securable to said housing around one end of said drive spindle, a tubular drive shaft disposed in said tubular member in alignment with said spindles and with the ends of said drive shaft respectively connected to said spindles, said spindles providing the sole support for the respective ends of said drive shaft, said driven spindle having an enlarged intermediate portion disposed within the foreward end portion of said tubular body member, and first and second bearing means respectively mounted at opposite ends of said enlarged portion for journaling said driven spindle in said tubular body member.
Claim 3
Dependent Claim
29 words
A grinder attachment according to claim 1, wherein said one end of said drive spindle is generally spherical with the external diameter thereof slidably receivable in said drive shaft.
Claim 4
Dependent Claim
37 words
A grinder attachment according to claim 2, comprising a diametric slot in said one end of said drive spindle, and a coupling member fixedly mounted in said drive shaft and having a tongue receivable in said slot.
Claim 5
Dependent Claim
21 words
A grinder attachment according to claim 1 comprising manually operated means for locking and unlocking said tubular member in said socket.
Claim 6
Dependent Claim
50 words
A grinder attachment according to claim 4 wherein said means for locking comprises a circumferential groove in said tubular member, and a transversely movable locking member mounted in said housing adjacent said socket for movement into and out of said groove when said tubular member is disposed in said socket.
Claim 7
Dependent Claim
44 words
A grinder attachment according to claim 5, comprising a radially extending pin on said tubular member, and means defining in said housing adjacent to said socket a groove for receiving said pin for angularly orienting said quill assembly with respect to said power head.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |