Details for Patent: 4,955,344
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Summary for Patent: 4,955,344
| Title: | Apparatus for controlling rotational speed of prime mover of construction machine |
| Abstract: | A controller having an up/down switch for changing the rotational speed of a prime mover such as an engine, an actuator such as an electric motor for driving a governor on the basis of the operation of the up/down switch so as to control the rotational speed of the prime mover. A target speed is calculated on the basis of the operation of the up/down switch, and the prime mover speed is controlled by using the calculated value. Another switch is provided to immediately shift the prime mover speed to a speed previously set as desired. This shift switch is used to control the prime mover so that the prime mover rotates at the set speed, and this speed is adjusted by operating the up/down switch. |
| Inventor(s): | Tatsumi; Akira (Chiba, JP), Hirata; Toichi (Ibaragi, JP), Egashira; Masaki (Ibaragi, JP), Tomikawa; Osamu (Ibaragi, JP), Watanabe; Hiroshi (Ibaragi, JP) |
| Assignee: | Hitachi Construction Machinery Co., Ltd. (Tokyo, JP) |
| Application Number: | 07/374,836 |
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Patent Claim Types: see list of patent claims | Device; |
Drugs Protected by US Patent 4,955,344
| Applicant | Tradename | Generic Name | Dosage | NDA | Approval Date | TE | Type | RLD | RS | Patent No. | Patent Expiration | Product | Substance | Delist Req. | Patented / Exclusive Use | Submissiondate |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| >Applicant | >Tradename | >Generic Name | >Dosage | >NDA | >Approval Date | >TE | >Type | >RLD | >RS | >Patent No. | >Patent Expiration | >Product | >Substance | >Delist Req. | >Patented / Exclusive Use | >Submissiondate |
Foreign Priority and PCT Information for Patent: 4,955,344
| Foriegn Application Priority Data | ||
| Foreign Country | Foreign Patent Number | Foreign Patent Date |
| Japan | 63-166317 | Jul 4, 1988 |
International Family Members for US Patent 4,955,344
| Country | Patent Number | Estimated Expiration | Supplementary Protection Certificate | SPC Country | SPC Expiration |
|---|---|---|---|---|---|
| Germany | 68927298 | ⤷ Try a Trial | |||
| Germany | 68929088 | ⤷ Try a Trial | |||
| European Patent Office | 0353799 | ⤷ Try a Trial | |||
| European Patent Office | 0505013 | ⤷ Try a Trial | |||
| European Patent Office | 0628665 | ⤷ Try a Trial | |||
| Japan | 2831377 | ⤷ Try a Trial | |||
| >Country | >Patent Number | >Estimated Expiration | >Supplementary Protection Certificate | >SPC Country | >SPC Expiration |
