Patent US4193360A successfully refreshed from Google Patents.
US4193360A
Expired / Lapsed
US
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Knife block assembly tufting machines
Assignee: Philips Road Engineering Ltd
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Filing: 1978-11-24
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Granted: 1980-03-18
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Expires: 1998-11-24
Abstract
Abstract A knife block for use in a fine gauge tufting machine carries four knives, disposed in pairs on opposite sides of a central web with their edges engaged in opposed pairs of grooves in the block. The knives are retained in the block by two knurled cylindrical clamping blocks, which are disposed in slots in the block and are pressed by clamping screws into engagement with the edges of the knives.
Inventors
- 👤 Ernest K. Lund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:16
CPC Classifications
D; D05; D05C; D05C15/00; D05C15/04; D05C15/08; D05C15/16; D05C15/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
122 words
A knife block for use in a fine gauge tufting machine and comprising front and rear members joined by a thinner central web, a peg projecting from the rear member for securing the knife block to a knife bar, four knives, which are disposed in pairs on opposite sides of the web and extend in planes parallel to the web with their edges accommodated in opposed pairs of slots in the front and rear members, two spaced, knurled cylindrical clamping blocks disposed in slots in the front member with their axes perpendicular to the planes of the knives and clamping screws, fitted into tapped holes in the front member, which press the clamping blocks into engagement with the edges of the knives.
Claim 2
Dependent Claim
122 words
A knife block for use in a fine gauge tufting machine and comprising front and rear members joined by a thinner central web, a peg projecting from the rear member for securing the knife block to a knife bar, four knives, which are disposed in pairs on opposite sides of the web and extend in planes parallel to the web with their edges accommodated in opposed pairs of slots in the front and rear members, two spaced, knurled cylindrical clamping blocks disposed in slots in the front member with their axes perpendicular to the planes of the knives and clamping screws, fitted into tapped holes in the front member, which press the clamping blocks into engagement with the edges of the knives.
Claim 3
Dependent Claim
21 words
A knife block according to claim 1, in which the clamping screws have tips which engage dimples in the clamping blocks.
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) | 1983-03-18 | 1983-09-17 | 1984-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-18 | 1987-09-17 | 1988-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-18 | 1991-09-17 | 1992-03-18 | $7700.00 | Window Closed / Lapsed |