[특허]Spring loaded jack stand

Spring loaded jack stand 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A47F-005/00
출원번호	US-0736020 (1991-07-25)
발명자 / 주소	Few Jeffrey P. (West Hills CA)
출원인 / 주소	Norco Industries, Inc (Compton CA 02)
인용정보	피인용 횟수 : 53 인용 특허 : 0

초록 ▼

A jack stand apparatus comprising a broad stable base to ensure safe support of a raised object with a selectively positioned vertical support member secured by a ratchet and pawl type engagement mechanism. The jack stand in its free state maintains the pawl in engagement with the ratchet by means of a torque spring which applies sufficient force to ensure engagement of the pawl with the ratchet in any position. This spring biased type pawl ensures engagement of the pawl and ratchet to prevent sudden movement of the vertical support member during transport. A pivot pin handle which carries said pawl and torque spring may be manually rotated with sufficient force to oppose the torque spring thus permitting disengagement of the pawl from the ratchet.

대표청구항 ▼

A jack stand comprising: a base formed at the apex with a hollow, upwardly opening vertical neck of rectangular configuration and one wall of said base formed with a window, said base having a predetermined height; a flange adjacent to said window and projecting from said neck; an elongated stem received telescopically in said neck and formed with a tooth rack extending along the side thereof confronting said window, said rack including longitudinally spaced apart horizontally projecting teeth each formed on their bottom sides with a downwardly facing horizontal support surface and on its upper side with a surface sloping upwardly and inwardly from the free end of the tooth at an angle of no greater than 45°from the horizontal and terminating at its outer edge in a corner defining a latch stop; a pivot pin carried from said flange, adjacent said window; a crank handle carried from one end of said pivot pin and formed with a hand grasp rod; a pawl carried from said pivot pin and configured to curve upwardly and inwardly in one direction to terminate in a tip configured to be selectively engageable under the respective support surfaces of said teeth and configured on its bottom side with a limit surface to be disposed in the path of said teeth and selectively engageable against said respective latch stops; and a torque spring interposed between said pivot pin and pawl to urge said pawl into engagement between the respective teeth of said rack with a predetermined torque, said teeth and pawl being so configured and arranged that said predetermined torque on said pawl is sufficient to, when said pawl is engaged over the latch stop of a selected tooth and said stem is grasped by a workman and lifted, maintain said limit surface disposed in the path of said latch stop of said selected tooth with sufficient force to enable said base to be carried from said stem.

이 특허를 인용한 특허 (53)

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Arzouman, Harry H., Commercial lifting device-jack stand.
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Fagan, John E.; Jaipaul, Larry M.; McKee, Ralph Sam; Rucker, Stephen J.; Sandmann, David Dwight; Keck, Jr., William R., Control and communication system for a wireless vehicle lift system.
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Baker, William J., Coordinated lift system.
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Baker,William J., Coordinated lift system.
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Greenwood, Kyle L., Ratchet platform.
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Greenwood, Kyle L., Ratchet platform.
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Greenwood, Kyle L.; Melvin, Bobby D., Ratchet platform.
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Greenwood, Kyle L.; Melvin, Bobby D., Ratchet platform.
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Hanlon, Jared, Ratchet stand device.
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Seber, Brett P.; Tom, Wesley James, Ratcheting jack stand.
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Greenwood, Kyle L., Soldier platform system.
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Greenwood, Kyle L., Soldier platform system.
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Greenwood, Kyle L., Soldier platform system.
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Greenwood, Kyle L.; Melvin, Bobby D.; Yalamanchili, Rattaya C.; Buckner, James; Hagan, James, Soldier platform system.
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Greenwood, Kyle L., Soldier support system in a vehicle.
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Greenwood, Kyle L.; Melvin, Bobby D.; Yalamanchili, Rattaya C.; Buckner, James; Hagan, James, Soldier support system in a vehicle.
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Greenwood, Kyle L; Hartmann, William J, Soldier support system in a vehicle.
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Liu, James, Stabilized jack stand.
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O'Connell, Timothy E., Telescoping stabilization system comprising a reinforced telescoping member.
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Fagan, John E.; Jaipaul, Larry M.; McKee, Ralph Sam; Rucker, Stephen J.; Sandmann, David Dwight; Keck, Jr., William R., Velocity controlled wireless vehicle lift system.
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Ceravolo, Frank, Weight supporting apparatus and method.
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Ceravolo, Frank, Weight supporting apparatus and method.
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Jaipaul, Larry M.; Fagan, John E.; Sandmann, David Dwight; Keck, Jr., William R.; Rucker, Stephen J.; McKee, Ralph S., Wireless vehicle lift system with enhanced electronic controls.
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Jaipaul, Larry M.; Fagan, John E.; Sandmann, David Dwight; Keck, Jr., William R.; Rucker, Stephen J.; McKee, Ralph S., Wireless vehicle lift system with enhanced electronic controls.
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Jaipaul, Larry M.; Fagan, John E.; Sandmann, David Dwight; Keck, Jr., William R.; Rucker, Stephen J.; McKee, Ralph S., Wireless vehicle lift system with enhanced electronic controls.
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Jaipaul, Larry M.; Fagan, John E.; Sandmann, David Dwight; Keck, Jr., William R.; Rucker, Stephen J.; McKee, Ralph S., Wireless vehicle lift system with enhanced electronic controls.
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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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Spring loaded jack stand 원문보기

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이 특허를 인용한 특허 (53)

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