US3885484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosively actuated compressed disc line cutter
Assignee: Zeneca Inc
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Filing: 1973-10-23
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Granted: 1975-05-27
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Expires: 1993-10-23
Abstract
Abstract A cutting tool is disclosed for use in severing lines and cables, especially those which are constructed from multifilament, low denier polymer resins. An explosively activated piston drives a compressed disc through a segment of a multifilament cable or line, thereby shearing out a small segment thereof.
Inventors
- 👤 Daniel C Sturgis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:20
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/006; B; B23; B23D; B23D15/00; B23D15/12; B23D15/14; B23D15/145; H; H01; H01H; H01H39/00; H01H39/006; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8772; Y10T83/8821; Y10T83/8858; Y10T83/8863
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
A line cutting tool comprising: a. a tubular casing having at least one pair of opposing openings through its walls for the insertion of a line therethrough, b. a moveable, tempered disc having contact with the interior walls of said casing, c. means for pushing said disc under compression to pass by said openings such that a line inserted through said openings is severed into three sections.
Claim 2
Dependent Claim
67 words
A line cutting tool comprising: a. a tubular casing having at least one pair of opposing openings through its walls for the insertion of a line therethrough, b. a moveable, tempered disc having contact with the interior walls of said casing, c. means for pushing said disc under compression to pass by said openings such that a line inserted through said openings is severed into three sections.
Claim 3
Dependent Claim
37 words
A line cutting tool of claim 1 wherein said means for forcing said disc under compression is a slideable piston within said casing having cross sectional dimensions similar to the interior cross section of said tubular casing.
Claim 4
Dependent Claim
98 words
A line cutting tool of claim 1 wherein, a. said tubular casing has at one end an electrically activated squib in gas tight relationship therewith, and wherein said pair of openings through the walls of said casing for the insertion of at least one line therethrough are located at the other end of said casing, b. said disc is compressed within the interior walls of said casing at a position between said squib and said pair of openings, and c. means for pushing said disc under compression to pass said openings is activated upon ignition of said squib.
Claim 5
Dependent Claim
30 words
A line cutting tool of claim 3 wherein said means for pushing said disc under compression is a piston having uniform cross section situated between said disc and said squib.
Claim 6
Dependent Claim
103 words
A cutting tool of claim 1 wherein, a. said tubular casing has an internal cross sectional dimension smaller over a linear section having at least one pair of opposing openings through its walls for the insertion of a line therethrough, b. a disc having contact with the interior walls of a larger interior section of said casing adjacent to the interior section thereof, and c. means for forcing said entire disc from said larger interior section into said smaller interior section to pass by said openings such that a line inserted therethrough is severed into three segments when said disc passes said openings.
Claim 7
Dependent Claim
33 words
A line cutting tool of claim 5 wherein said means for forcing said disc is a piston which is slideable into the section of hollow casing having the smaller cross sectional interior dimension.
Claim 8
Dependent Claim
43 words
A cutting tool of claim 6 wherein said section having smaller interior cross section is sufficiently small such that said piston shears a cross sectional segment of said disc under compression into said smaller cross sectional openings when forced into said smaller section.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |