Ball screw mechanism
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jun 12, 2007
Grant Date -
Oct 16, 2003
app pub date -
Apr 9, 2003
filing date -
Apr 15, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A ball screw mechanism includes a ball screw shaft of a metal material coaxially connected to a rotary driving source, a nut member of a resin material being screwed onto the ball screw shaft, a plate member fixed to an upper surface of the nut member by screw members, and steel balls which are arranged on a passage formed in the nut member closed by the plate member and which are installed into screw grooves of the ball screw shaft and the nut member.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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SMC KABUSHIKI KAISHA | TOKYO 101-0021 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Masui, Ryuuichi | Iwai, JP | 2 | 22 |
# of filed Patents : 2 Total Citations : 22 | |||
Nagai, Shigekazu | Adachi-ku, JP | 149 | 2505 |
# of filed Patents : 149 Total Citations : 2505 |
Cited Art Landscape
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Patent Citation Ranking
- 4 Citation Count
- F16H Class
- 3.35 % this patent is cited more than
- 18 Age
Forward Cite Landscape
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
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Jun 24, 2021 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 4 |
Jan 16, 2018 | I | Issuance | |
Dec 27, 2017 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Dec 14, 2017 | P | Published | |
Jun 13, 2016 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:VACHULA, GEORGE;WANG, MU-CHENG;DAMICO, MARIO;AND OTHERS;SIGNING DATES FROM 20160603 TO 20160606;REEL/FRAME:038900/0556 Owner name: RAYTHEON COMPANY, MASSACHUSETTS |
Jun 08, 2016 | F | Filing |

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