[특허]Safety knife

Safety knife 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B67B-007/00 B26D-003/00 B26B-005/00
출원번호	US-0667168 (1976-03-15)
발명자 / 주소	Wood Jess W. (1410 Randolph Arlington TX 76010)
인용정보	피인용 횟수 : 33 인용 특허 : 0

초록 ▼

A safety knife adapted for cutting corrugated cardboard boxes and the like which is characterized by having a cutting blade which is continuously biased toward a retracted position within the knife\s handle. The blade is held within a carriage that is slidable along a groove within the handle. A tension spring attached to the carriage urges the carriage toward its retracted position at all times. A dragging means is provided for pulling the carriage out of the handle and bringing the blade into contact with a structure to be cut. In one embodiment, this dragging means includes a cantilevered wire firmly attached to the slidable carriage, with the distal end of said wire having a hook which is adapted to drag along the structure to be cut. When the blade is cutting, the wire flexes backward into a position alongside the blade where it does not interfere with the cutting action. If the blade is ever withdrawn from the cardboard being cut, the tension spring immediately pulls the blade safely back into the handle. Depending upon whether the hook normally rests in a protruding position, or whether it normally rests in a sheltered position where it is at least partially shielded by the handle, the knife can be designed to begin cutting anywhere along a planar surface or a cut may be initiated only at the edge of a surface. In another embodiment, the dragging means includes a cantilevered arm made of a material like nylon or acetal resin; a serrated tip is typically provided at the end of such an arm so that the tip may be engaged with the structure to be cut. After engaging the tip, pulling the handle along the surface to be cut automatically pulls the carriage out of the handle and brings the blade into a cutting position. The handle is designed to be firmly gripped in a convenient manner, with all fingers being held in a natural position. No special “finger control”is necessary to keep the blade extended, and the knife may even be easily used by a person wearing bulky gloves.

대표청구항 ▼

A safety knife, comprising: a. a handle having a cavity therein, with a portion of the cavity being elongated to define a groove; b. a carriage slidable along the groove in the handle, and said carriage being adapted to hold a blade, with said carriage having a retracted position within the handle at which the blade does not protrude outside of the handle, and said carriage also having an extended position at which the blade partially lies beyond the boundary of the handle such that a portion of the blade is exposed for cutting; c. spring means for biasing said carriage toward its retracted position at all times; and d. means for pulling the blade into contact with a structure to be cut, with said means including an element for dragging along said structure and for pulling the carriage in opposition to the spring means from its retracted position toward its extended position as the handle is moved across the surface of the structure to be cut. The method of automatically providing a blade in cutting position outside the handle of a safety knife, with there being a non-elastic but resilient member mounted in a cantilevered manner with respect to the cutting blade, with said resilient member having a distal end which lies exteriorly of the handle of said safety knife, comprising the steps of: moving the handle adjacent the structure to be cut in such a way as to drag the distal end of said resilient member against the surface of the structure to be cut, with said dragging being in a direction toward the handle such that the resisting force exerted by the structure against such dragging is in a direction away from the handle, so that the cutting blade is pulled out of the handle by the force which resists such dragging.

이 특허를 인용한 특허 (33)

Ortner, Mel Wayne; Schwartz, Donald R.; Turley, Timothy A.; Kueffner, Fred K., Automatic safety knife.
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Ortner, Mel Wayne; Schwartz, Donald R.; Turley, Timothy A.; Kueffner, Fred K., Automatic safety knife.
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Berns Harald (Wuppertal DEX), Autoretracting box-cutting knife.
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Berns Harald,DEX, Box cutter with autoretracting blade.
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Berns, Harald, Box cutter with autoretracting blade.
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Allegretti, C. John; Raso, Anthony M.; Just, Lyndon, Bulk material shipping container.
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Allegretti, C. John; Raso, Anthony M.; Just, Lyndon, Bulk material shipping container.
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Allegretti, C. John; Raso, Anthony M.; Just, Lyndon, Bulk material shipping container.
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Allegretti, C. John; Raso, Anthony M.; Just, Lyndon, Bulk material shipping container.
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Allegretti, C. John; Raso, Anthony M.; Just, Lyndon, Bulk material shipping container.
상세보기
Allegretti, C. John; Raso, Anthony M.; Just, Lyndon, Bulk material shipping container.
상세보기
Allegretti, C. John; Raso, Anthony M.; Just, Lyndon, Bulk material shipping container.
상세보기
Allegretti, C. John; Raso, Anthony M.; Just, Lyndon, Bulk material shipping container.
상세보기
Allegretti, C. John; Raso, Anthony M.; Just, Lyndon, Bulk material shipping container.
상세보기
Vito Raymond P. (2224 Riada Dr. ; NW. Atlanta GA 30305) Boehm H. Russell (205 Governor\s Dr. Forest Park GA 30050), Carton cutting knife.
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Okada Yoshio (Osaka JPX), Compact safety knife.
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Ranieri, Eric; Rowlay, Stephen; Van Deursen, Gary E, Compact utility knife.
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Ranieri, Eric; Rowlay, Stephen; Van Deursen, Gary E., Compact utility knife.
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Ruff Stanley L. (9 Arbor Dr. New Rochelle NY 10804), Corrugated carton cutter.
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Wu, Yuewei, Cutting device.
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Tremblay, Gérard, Cutting device with retractable blade.
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Fischer, Sebastian, Dual-blade film-cutting device.
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Berns, Harald, Hollow-handle razor knife with blade slide.
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Davis Roger I. (Didsbury GB3) Scott David B. (Halfway GB3), Knife.
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Rohrbach, Martin, Knife.
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Aigner, Robert; Pl?tz, Florian; Michaelis, Sven; Brauer, Michael, Method of producing micromechanical structures.
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Okada, Hiroshi, Safety cutter knife.
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Garavaglia, Joseph P.; Spoelstra, Brandon L.; Gropl, Markus E.; Marinovich, Mark, Safety cutter with blade change/storage mechanism.
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Murray, Otis J., Shrimp deveining tool.
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Glynn, Peter; Oren, Joshua, System and method for delivering proppant to a blender.
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Oren, Joshua, Trailer-mounted proppant delivery system.
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Rehm Helmut (Adlerstrassa 17 8311 Altfraunhofen DEX), Utility knife.
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Hao, Wen, Utility knife with extended travel carriage.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
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이 특허를 인용한 특허 (33)

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