Y10T- TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION.Y10- TECHNICAL SUBJECTS COVERED BY FORMER USPC.Y- GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS AND DIGESTS.E05Y2900/13- Application of doors, windows, wings or fittings thereof for buildings or parts thereof characterised by the type of wing.E05Y2900/10- Application of doors, windows, wings or fittings thereof for buildings or parts thereof.E05Y2900/00- Application of doors, windows, wings or fittings thereof.E05Y- INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING.E05D13/1207- Counterbalance devices with springs with tension springs.E05D13/12- Counterbalance devices with springs.E05D13/00- Accessories for sliding or lifting wings, e.g.E05D- HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS.E05- LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES.238000009434 installation Methods 0.000 title description 8. Assignors: QUAKER CITY MANUFACTURING COMPANY Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links NUNC PRO TUNC ASSIGNMENT (SEE DOCUMENT FOR DETAILS). Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Quaker City Manufacturing Co filed Critical Quaker City Manufacturing Co Priority to US06/157,858 priority Critical patent/US4332054A/en Application granted granted Critical Publication of US4332054A publication Critical patent/US4332054A/en Assigned to QCM CORPORATION, A CORP. Original Assignee Quaker City Manufacturing Co Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Jones Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US06/157,858 Inventor H. Google Patents Block and tackle window sash balance and installation methodÄownload PDF Info Publication number US4332054A US4332054A US06/157,858 US15785880A US4332054A US 4332054 A US4332054 A US 4332054A US 15785880 A US15785880 A US 15785880A US 4332054 A US4332054 A US 4332054A Authority US United States Prior art keywords sash balance foot member housing frame lanyard Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4332054A - Block and tackle window sash balance and installation method US4332054A - Block and tackle window sash balance and installation method
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