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Title: US4949425: Spring loaded block and tackle window sash balance assembly
[ Derwent Title ]

Country: US United States of America

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8 pages

Inventor: Dodson, Earl L.; Elliston, VA
Strobl, Jr., Frederick P.; Cary, IL

Assignee: American Balance Corporation, Roanoke, VA
other patents from AMERICAN BALANCE CORPORATION (23900) (approx. 2)
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Published / Filed: 1990-08-21 / 1988-10-19

Application Number: US1988000259419

IPC Code: Advanced: E05F 1/16;
IPC-7: E05F 1/16;

ECLA Code: E05D13/12D; P05Y201/67; P05Y900/148;

U.S. Class: Current: 016/198; 016/197; 016/213; 016/DIG.016; 016/DIG.020; 016/DIG.031; 049/414; 049/429; 049/446;
Original: 016/198; 016/DIG.16; 016/DIG.31; 016/197; 016/DIG.20; 016/213; 049/446; 049/429; 049/414;

Field of Search: 016/193,197,211,212,213,214,DIG. 16,DIG. 31,198 049/445,446,451,414,429,441,430,431,432

Priority Number:
1988-10-19  US1988000259419
1986-10-24  US1986000922998

Abstract:     A pre-assembled, spring loaded, block and tackle window sash balance assembly is adapted for providing vertical support for a window sash running in an elongated, generally upright sash run having a generally C-shaped guide channel extending along its plow region. The assembly comprises a generally U-shaped housing for a block and tackle spring balance device. The assembly further includes spaced slide means which are discrete from the housing itself and which are slidably interengageable with the guide channel for removeably attaching the assembly to the sash run. Accordingly, the block and tackle balance assembly may be pre-assembled and then conveniently and efficiently attached to the sash run and supported in a position to provide spring balanced support for a window sash mounted in the sash run.

Attorney, Agent or Firm: Staas & Halsey ;

Primary / Asst. Examiners: Seidel, Richard K.; Brown, Edward A.

Maintenance Status: CC Certificate of Correction issued

INPADOC Legal Status: Show legal status actions

Related Applications:
Application Number Filed Patent Pub. Date  Title
US1986000922998 1986-10-24       

Parent Case:     This is a continuation of Ser. No. 922,989, filed 10/24/86, now abandoned.

Family: None

First Claim:
Show all 17 claims
We claim:     1. A unitary, spring loaded, block and tackle balance assembly adapted for providing vertical support for a window sash running in an elongated, generally upright sash run having a guide channel comprising flange means defining a longitudinal slot extending along a plow region of the sash run, said assembly comprising:
  • an elongated, generally U-shaped housing having a pair of generally parallel, laterally spaced side walls and an outer wall interconnecting the side walls, said outer wall and said side walls together defining an elongated chamber having an open side located across from said outer wall;
  • block and tackle spring balance means in said chamber and adapted for being operably connected to said sash in supporting relationship thereto;
  • first securing means discrete from said housing and including first slide means configured for slidably interengaging said guide channel;
  • means for mounting said first securing means in said chamber in a generally fixed longitudinally position with said first slide means adjacent said open side of the chamber;
  • second securing means discrete from the housing and fixed in said chamber in longitudinal spaced relationship to said first securing means, said second securing means including second slide means disposed adjacent said open side of the chamber and configured for slidably interengaging said guide channel; and
  • support means for holding said assembly in a fixed longitudinal position relative to said guide channel during running of the window sash in the sash run,
  • whereby said assembly may be slidably received in said sash run during attachment in the latter and thereby mounted in the said fixed position relative to the guide channel for supporting a window sash with said block and tackle spring balance means covered by said housing.

Background / Summary: Show background / summary

Drawing Descriptions: Show drawing descriptions

Description: Show description

Forward References: Show 23 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (23)   |   Backward references (8)   |   Citation Link

Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 2pp US2262990  1941-11 Cross   Window sash counterbalance
Get PDF - 9pp US3054152  1962-09 Trammell   Window unit
Get PDF - 5pp US3086259  1963-06 Klein   Window structure with removable sashes
Get PDF - 4pp US3091797  1963-06 Prosser   Window structure
Get PDF - 4pp US3114178  1963-12 Wood   Sliding window and counterbalancer combination
Get PDF - 9pp US4078336  1978-03 Prosser   Window and sash balance
Get PDF - 10pp US4089085  1978-05 Fitzgibbon  Balance Systems, Inc. Sash balances and components thereof
Get PDF - 9pp US4190930  1980-03 Prosser   Window and sash balance
Foreign References: None

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