专利检索_ ..吊钩专利检索_ ..吊钩专利检索查询

序号	专利名	申请号	申请日	公开（公告）号	公开（公告）日	发明人
61	Oil well derrick with guide track for travelling block dolly	US13412771	1971-04-15	US3826472A	1974-07-30	WOOLSLAYER H; JENKINS C
An oil well derrick has two front legs and two downwardly diverging back legs. Cross braces rigidly connect the back legs and also rigidly connect the back legs to the front legs. The front legs extend downwardly from the top of the derrick in parallel relation for at least the major portion of the distance from top to bottom of the derrick and form the rails of a guide track. Mounted on this track is a travelling block dolly that is movable up and down the track. The front of the derrick between the track rails is open to allow stands of pipe to be moved through the track into and out of the derrick.
62	Serial-by-digit recirculating accumulating register	US3509331D	1966-10-24	US3509331A	1970-04-28	CUTAIA ALFRED

63	Safety hook for drilling apparatus	US7442260	1960-12-07	US3106416A	1963-10-08	KOONTZ JAMES H

64	Hook-block assembly	US63826757	1957-02-05	US2980400A	1961-04-18	LONG SPENCER W

65	Connector-hook	US32005652	1952-11-12	US2814522A	1957-11-26	PALMER MELVIN J; WILSON WILLIAM A

66	Drilling hook	US25354451	1951-10-27	US2672364A	1954-03-16	DOUGLAS RAGLAND

67	Hook locking mechanism	US6945449	1949-01-06	US2664175A	1953-12-29	HERTEL RICHARD K; NICOLSON GARTH F

68	Drilling hook assembly	US22742651	1951-05-21	US2661232A	1953-12-01	LONG SPENCER W

69	Hook	US74547547	1947-05-02	US2613981A	1952-10-14	MINOR BURT S

70	Liner package for hooks	US18803150	1950-10-02	US2585408A	1952-02-12	MCINNIS ROBERSON CLAUDE

71	Oil well hook	US76290247	1947-07-23	US2519288A	1950-08-15	ROBERSON CLAUDE M

72	Spring loaded hydraulic adapter	US77054147	1947-08-25	US2513990A	1950-07-04	BENNETT JOHN D

73	Spring hook	US59094045	1945-04-28	US2506593A	1950-05-09	HERTEL RICHARD K; NICOLSON GARTH F

74	Drilling hook	US47652643	1943-02-20	US2338349A	1944-01-04	NICOLSON GARTH F; HERTEL RICHARD K

75	Drilling hook	US42619642	1942-01-09	US2331341A	1943-10-12	NICOLSON GARTH F; HERTEL RICHARD K

76	Weight indicator for rotary drilling	US29659639	1939-09-26	US2298216A	1942-10-06	LAMBERGER EDWARD H; LANGER BERNARD F

77	Clevis	US25314839	1939-01-27	US2232997A	1941-02-25	CALDWELL WALTER T

78	Hook for rotary well drilling	US13944137	1937-04-28	US2215049A	1940-09-17	MINOR BURT S

79	Safety hook	US7410936	1936-04-13	US2196460A	1940-04-09	HERTEL RICHARD K

80	Sucker rod hook	US16453137	1937-09-18	US2174911A	1939-10-03	STEVENSON EDWARD E

1 2 3 4 5 6 7 8

该功能需要专业版企业版VIP权限，您可以：