Patent US3759642A successfully refreshed from Google Patents.
US3759642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
T-slot bolt
Assignee: WR Grace and Co Conn
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Filing: 1971-10-26
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Granted: 1973-09-18
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Expires: 1991-10-26
Abstract
Abstract The present invention is to a T-slot bolt for use with set-up and hold-down tools employed with planers, shapers, milling machines and the like machine assemblies having a conventional Tslot containing worktable and is of a configuration such that the T-head member can be slipped into a mating T-slot of the worktable anywhere along its length.
Inventors
- 👤 C Potet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:29
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/22; B30B11/227; B01; B01J; B01J2/00; B01J2/20; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29B9/065; Y; Y10; Y10T; Y10T83/00; Y10T83/364
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
272 words
A T-slot bolt for use with a T-slotted worktable which comprises: a T-head member, the bottom portion of said T-head member being a substantially rectangular stepped section mating with a Tslot of a T-slotted worktable, said stepped section having a length sufficient such that when positioned in said T-slot it is held therein but having a width such that said rectangular section can be slipped into said T-slot of said worktable anywhere along its length, the upper portion of said stepped section of said T-head member being a vertical walled shoulder indented a distance from its ends such that when said T-head member is positioned in said T-slot the vertical walls of said shoulder slidably but snugly fit between the walls of the Tslot, the bottom surface of said stepped section being fitted with a spring member, said spring member being of a length such that when compressed it permits free rotation of said T-head member within said T-slot below the walls of said T-slot and upon release, as the vertical walls of said shoulder are aligned with the walls of said T-slot, it pushes the shoulder of said T-head member upwardly against the bottom of said Tslot, the vertical walls of said shoulder being slid upwardly between the walls of said T-slot thereby holding said T-slot bolt in a predetermined position within said slot and preventing it from turning within said slot, an elongated shank above said shoulder, said shank being of a height such that the top of said shank extends above the upper surface of the Tslotted worktable, and the upper portion of said shank being fitted with threads.
Claim 2
Dependent Claim
272 words
A T-slot bolt for use with a T-slotted worktable which comprises: a T-head member, the bottom portion of said T-head member being a substantially rectangular stepped section mating with a Tslot of a T-slotted worktable, said stepped section having a length sufficient such that when positioned in said T-slot it is held therein but having a width such that said rectangular section can be slipped into said T-slot of said worktable anywhere along its length, the upper portion of said stepped section of said T-head member being a vertical walled shoulder indented a distance from its ends such that when said T-head member is positioned in said T-slot the vertical walls of said shoulder slidably but snugly fit between the walls of the Tslot, the bottom surface of said stepped section being fitted with a spring member, said spring member being of a length such that when compressed it permits free rotation of said T-head member within said T-slot below the walls of said T-slot and upon release, as the vertical walls of said shoulder are aligned with the walls of said T-slot, it pushes the shoulder of said T-head member upwardly against the bottom of said Tslot, the vertical walls of said shoulder being slid upwardly between the walls of said T-slot thereby holding said T-slot bolt in a predetermined position within said slot and preventing it from turning within said slot, an elongated shank above said shoulder, said shank being of a height such that the top of said shank extends above the upper surface of the Tslotted worktable, and the upper portion of said shank being fitted with threads.
Claim 3
Dependent Claim
16 words
The T-slot bolt as defined in claim 1 wherein said spring member is a coil spring.
Claim 4
Dependent Claim
23 words
The T-slot bolt is defined in claim 1 wherein said bolt shank contains a knurled section intermediate the T-head and the threaded portion.
Claim 5
Dependent Claim
16 words
The T-slot bolt as defined in claim 1 wherein said spring member is a spring pin.
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |