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91.
公开(公告)号:US2619839A
公开(公告)日:1952-12-02
申请号:US17418450
申请日:1950-07-17
申请人: DEERE & CO
发明人: LOVE MAHLON L
CPC分类号: F16H23/04 , A01D34/305 , Y10T74/18336 , Y10T74/2183
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公开(公告)号:US2573068A
公开(公告)日:1951-10-30
申请号:US8876649
申请日:1949-04-21
申请人: ELMER SCHARF PERCY
发明人: ELMER SCHARF PERCY
IPC分类号: A01D34/30
CPC分类号: A01D34/30
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公开(公告)号:US2486209A
公开(公告)日:1949-10-25
申请号:US70315446
申请日:1946-10-14
申请人: MIKEL ROADS
发明人: MIKEL ROADS
IPC分类号: A01D34/30
CPC分类号: A01D34/30 , Y10T74/18304
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公开(公告)号:US2345383A
公开(公告)日:1944-03-28
申请号:US42506941
申请日:1941-12-31
申请人: CURTIS JOHN S
发明人: CURTIS JOHN S
IPC分类号: A01D34/30
CPC分类号: A01D34/305 , Y10T74/18256
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公开(公告)号:US2109085A
公开(公告)日:1938-02-22
申请号:US6583236
申请日:1936-02-26
申请人: CHILSTROM GUS E , ABEL THOMPSON
发明人: CHILSTROM GUS E , ABEL THOMPSON
IPC分类号: A01D34/30
CPC分类号: A01D34/305
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公开(公告)号:US1844188A
公开(公告)日:1932-02-09
申请号:US35025729
申请日:1929-03-27
申请人: STONE NATHANIEL B
发明人: STONE NATHANIEL B
IPC分类号: A01D34/30
CPC分类号: A01D34/305
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公开(公告)号:US1594244A
公开(公告)日:1926-07-27
申请号:US65712523
申请日:1923-08-13
申请人: H C P MADDISON , LLOYD PARRIOTT , ED STRICKLER
发明人: DANIELS LLOYD G
CPC分类号: A01D34/30 , F16H21/365
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公开(公告)号:US1532358A
公开(公告)日:1925-04-07
申请号:US59976222
申请日:1922-11-09
申请人: REINHOLD WEIDEMANN
发明人: REINHOLD WEIDEMANN
IPC分类号: A01D34/30
CPC分类号: A01D34/305
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公开(公告)号:US11882788B2
公开(公告)日:2024-01-30
申请号:US17141556
申请日:2021-01-05
发明人: Jonas Toft Andersen
IPC分类号: A01D34/37 , A01D34/38 , A01D34/40 , A01D41/14 , A01D34/14 , A01D34/04 , F16F9/02 , F16F9/04 , F16F9/096 , F16H25/20 , A01D34/03 , A01D34/30
CPC分类号: A01D34/14 , A01D34/037 , A01D34/04 , A01D34/305 , A01D34/37 , A01D34/38 , A01D34/40 , A01D41/141 , F16F9/0218 , F16F9/04 , F16F9/096 , F16H25/20 , F16F2222/126 , F16F2228/04 , F16H2025/2037 , F16H2025/2062 , F16H2025/2068
摘要: A mowing sickle drive system comprises a knife bar supported by a frame and drive apparatus operable to drive the knife bar in a reciprocating linear motion at a variable drive frequency. A spring is coupled to the knife bar for applying a restoring force to the knife bar toward a neutral position when in motion. The spring has a variable modulus of elasticity that is controlled dependent upon the drive frequency.
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公开(公告)号:US20230157204A1
公开(公告)日:2023-05-25
申请号:US18047931
申请日:2022-10-19
CPC分类号: A01D34/008 , A01D34/74 , A01D34/30 , A01D69/06 , A01D2101/00
摘要: A self-propelled work apparatus, especially a lawnmower, includes a chassis, at least one tool and a drive motor for driving the tool. The tool is height-adjustable with respect to the chassis. A setting unit is provided to set the relative position of the tool with respect to the chassis. The setting unit includes an actuating motor and a setting gear. The setting gear rotates by less than one full revolution between a first, lower end position of the tool and a second, upper end position of the tool. A detection device is provided to detect the height position of the tool. The detection device includes encoding elements on the setting gear and at least one detector. The at least one first encoding element for the first end position differs from the at least one second encoding element for the second end position.
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