Claims
- 1. In a power door operator utilizing a rodless cylinder having an internal fluid sealed piston and a magnetically coupled external piston, internal piston motion in said cylinder provided by admission of a pressurized fluid to said cylinder on either side of said piston in order to open and close bi-parting passenger doors over an opening in a vehicle side wall, the improvement comprising:
- first and second coplanar doors mounted on said car for opposing motion in covering and uncovering an opening in said side wall; an endless belt and piston attachment operatively attaching said belt attached to said external piston, said belt on a mounting on said vehicle, said belt mounting arranging said belt with first and second oppositely moving belt surfaces positioned and moving essentially parallel to movement of said doors, said belt moved in conjunction with said external piston;
- a first drive arm attached to said first belt surface, said first arm connected to said first door and having a first inner edge intermediate said door and second belt surface;
- a second drive arm extending from and attached to said second belt surface and connected to said second door, said second drive arm also having an inner edge, one of said edges oppositely disposed relative to the other said edge when said doors are in said closed position;
- stop pins projecting from said drive arms;
- a door movement space defined between said drive arm inner edges when said doors are in a door closed position; and,
- a panel lock assembly for restricting door panel movement when said doors are in said closed position comprising:
- a mounting bracket on and extending from said vehicle side wall, said bracket aligned with said door movement space in the door closed position;
- a pivot pin on and extending from said bracket;
- first and second panel lock arms mounted on said pin for pivotal scissor-like motion around said pin;
- first and second inner and outer jaws on opposite ends of said lock arms, said inner and outer arms intermediate said belt and said passenger doors;
- means intermediate said outer jaws for biasing said lock arm outer jaws outwardly and inner jaws inwardly;
- first and second lock arm positions corresponding to said door closed position and a door open position, said drive arm pins moving said outer lock arms inwardly from said second position to said first position on door motion from said open position to said closed position and from said first position to said second position on door opening;
- a lock aperture, defined by said lock arm inner jaws when said lock arms are in said first position, said aperture closed by said lock arms in said second position;
- means on said mounting bracket operable by said cylinder for projecting a force biased lock pin into said lock aperture and said door movement space; wherein when said doors are in said closed position said lock pin occupies said door movement space and said lock aperture thereby limiting door movement from a fully closed position.
- 2. In combination, a power door operator utilizing a rodless cylinder including an internal fluid operated piston and a magnetically coupled external piston driving an endless belt for moving a pair of bi-parting door panels from open to closed positions over an opening in a side wall of a transit vehicle, and a panel lock comprising;
- means mounting said door panels for reciprocating motion between said open and closed positions along said car side wall;
- means mounting an endless belt for producing opposing motion along opposing portions of said belt, said portions parallel to and spaced from said door panels and side wall;
- a first door drive arm operatively attached to said external piston and a first portion of said belt, said arm extending from said belt and attached to one of said door panels;
- a first edge on said first arm, said edge essentially perpendicular to and disposed intermediate said panel and belt;
- a second door drive arm extending from a second and opposing portion of said belt, said arm attached to the other of said panels;
- a second edge on said second drive arm extending perpendicular to said belt and facing said first drive arm edge when said doors are in said closed position;
- a door movement space defined between said first and second arm edges when said door panels are in said closed position;
- a bracket on said car side wall, said bracket having an end intermediate said door and said belt;
- lock means for locking said doors, said lock means mounted on said bracket at said end, and partially operable by said door drive arms comprising:
- first and second lock arms with stop pins, said stop pins in alignment with said door drive arms for engagement during door motion to said door closed position;
- a lock aperture defined between said lock arms, when said door is in a door closed position, said lock aperture and door movement space disposed in vertical coincidence;
- means on said bracket for projecting a biased latch member into said lock aperture and door movement space when said door panels are in said closed position, said latch member cooperating with said drive arms to prevent door movement from a closed position to an open position;
- means for selectively retracting said latch member;
- whereby door motion from open to closed position engages said latch means and said lock arms, limiting drive arm movement across said door movement space, thereby preventing door movement from said closed position to said open position and selective retraction of said latch and whereby member allows said doors to move to said open position.
- 3. The combination of claim 2 wherein said member projecting means is a spring biased fluid operated cylinder and said member is a cylindrical pin.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 167,221, filed on Mar. 11, 1988now U.S. Pat. No. 4,901,474.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1452180 |
Sep 1966 |
FRX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
167221 |
Mar 1988 |
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