Metal working – Method of mechanical manufacture – Assembling or joining
Reexamination Certificate
2000-02-18
2001-10-30
Echols, P. W. (Department: 3726)
Metal working
Method of mechanical manufacture
Assembling or joining
C029S450000, C074S502600, C074S500500
Reexamination Certificate
active
06308393
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The subject invention relates to a motion transmitting remote control assembly of the type including a flexible motion transmitting core element movably supported in a conduit for transmitting motion in a curved path.
2. Description of the Prior Art
Remote control assemblies of this type are well known in the art to move a control member, such as a valve, from a conveniently located position which is remotely located from the actual control member being operated. A known function in such control assemblies is the ability to compensate for overtravel in the event the control member movement bottoms out before the core element movement. For example, if the control member being moved by the core reaches the closed position and a sufficient force is applied to the core element, the system could be damaged. In order to prevent such damage, an overtravel protection is built into the assembly to allow the core element to collapse when subjected to a predetermined high force. Examples of such assemblies are disclosed in U.S. Pat. No. 4,584,898 to Panushka; U.S. Pat. No. 4,630,957 to Ausprung; U.S. Pat. No. 4,753,123 to Stormont; U.S. Pat. No. 4,799,400, to Pickell; U.S. Pat. No. 4,917,224 to Gokee; U.S. Pat. No. 5,058,462 to Killiany et al. and U.S. Pat. No. 5,613,405 to Kelley et al.
In the design of such assemblies, it is an objective to minimize the length required by such overtravel mechanisms as well as to minimize the complexity of assembly.
SUMMARY OF THE INVENTION AND ADVANTAGES
A motion transmitting remote control assembly comprising a motion transmitting core element supported for longitudinal movement in a conduit. A tubular fitting extends from one end of said conduit and a rod is slidably disposed in the tubular fitting and has an inner end attached to the core element and an outer end extending from the tubular fitting. A terminal mechanism is attached to the outer end of the rod for transmitting motion between the rod and a control member and for providing lost motion between the rod and the control member in response to a predetermined force acting between the rod and the control member. The assembly is characterized by the terminal mechanism including an anchor member slidably supported on the tubular fitting.
The invention also includes the method of fabricating the terminal mechanism comprising the steps of sliding the rod end of a tubular anchor member into an open end of the tubular connector member, establishing an abutment coacting between the connector member and the anchor member for limiting movement of the connector member to a fully extended position in relationship to the anchor member, biasing the connector member to the fully extended position from the anchor member with a predetermined force, sliding the anchor member over the tubular fitting extending from the conduit, and connecting the rod end of the anchor member to the outer end of the rod.
In accordance with the subject invention, therefore, there is provided a remote control assembly having overtravel protection in a minimum of longitudinal space by overlapping the rigid tube extending from the conduit and an assembly which is relatively easy to assemble.
REFERENCES:
patent: 3206998 (1965-09-01), Matz, Jr. et al.
patent: 3273417 (1966-09-01), Sevrence
patent: 3645150 (1972-02-01), Crossland
patent: 4223564 (1980-09-01), Fawcett
patent: 4584898 (1986-04-01), Panushka
patent: 4630957 (1986-12-01), Ausprung
patent: 4753123 (1988-06-01), Stormont
patent: 4799400 (1989-01-01), Pickell
patent: 4917224 (1990-04-01), Gokee
patent: 5058462 (1991-10-01), Killiany et al.
patent: 5613405 (1997-03-01), Kelley et al.
patent: 5862580 (1999-01-01), Petruccello et al.
Benditt Ronnie
Haynes Robert
Cozart Jermie E.
Dann Dorfman Herrell and Skillman, P.C.
Echols P. W.
Triumph Controls, Inc.
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