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 Title: |
US5727445:
Actuator cylinder with mechanism to reduce stiction
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Sheldon, Paul C.; Mequon, WI
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| Assignee: |
Sheldon/Van Someren, Inc., Wauwatosa, WI
other patents from SHELDON/VAN SOMEREN, INC. (738702) (approx. 8)
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| Published / Filed: |
1998-03-17
/ 1996-11-06
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| Application Number: |
US1996000746081
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| IPC Code: |
Advanced:
F15B 15/20;
Core:
F15B 15/00;
IPC-7:
F01B 21/00;
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| ECLA Code: |
F15B15/20;
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| U.S. Class: |
Current:
092/002;
092/031;
092/168;
Original:
092/002;
092/031;
092/168;
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| Field of Search: |
092/031,32,2,33,168
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| Priority Number: |
| 1996-11-06 |
US1996000746081 |
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| Abstract: |
A linear actuator cylinder reduces the stiction otherwise present during initiation of rod extension or retraction. The actuator cylinder includes a cylinder assembly having a piston that slides longitudinally through a cylinder barrel. A rod is connected to the piston and extends from the cylinder barrel. A rotator mechanism is connected to the rod to rotate the piston and rod with respect to the cylinder barrel. The rotator mechanism typically includes a hydraulic or electric motor connected to the rod by, for example, a chain engaged with a pair of sprockets.
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| Primary / Asst. Examiners: |
Denion, Thomas E.;
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| INPADOC Legal Status: |
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| Family: |
None
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First Claim:
Show all 20 claims |
What is claimed is:
1. An actuator cylinder designed to reduce stiction, comprising:
- a cylinder assembly including:
- a cylinder barrel having a hollow interior;
- a first end and a second end connected to the cylinder barrel, the second end having an opening therethrough and being connected on an opposite side of the hollow interior from the first end;
- a piston slidably mounted in the hollow interior; and
- a rod extending from the piston and slidably received through the opening;
- a rotator mechanism connected to the cylinder assembly, wherein the rotator mechanism is able to impart relative rotation between the piston and the cylinder barrel; and
- an elastomeric seal disposed between the piston and an interior wall of the cylinder barrel, wherein the piston includes an annular groove configured to receive the elastomeric seal and an anti-rotation mechanism that cooperates with the seal to limit movement of the seal along the groove.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 6 U.S. patent(s) that reference this one
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