# US 2019/0169903 A1 · Counterbalance and method of making the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169903 A1 - Document ID: US20190169903A1 - Status: Published application - Kind: A1 - Application number: 16/267,639 - Filed: 2019-02-05 - Published: 2019-06-06 - Earliest claimed: 2017-04-13 - Assignees: Weber Knapp Company - Applicants: Weber Knapp Company - Inventors: Daniel M. Graham - Web page: https://patentgrep.com/patent/US20190169903A1 ## CPC - E05F 1/1261: {for counterbalancing} - E05D 3/02: with one pin - E05D 3/12: with two parallel pins and one arm - E05D 11/0054: {Covers, e.g. for protection} - E05D 11/06: Devices for limiting the opening movement of hinges - E05F 1/1058: {for counterbalancing} - E05Y 2999/00: Subject-matter not otherwise provided for in this subclass - E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING - E05D: HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS (pivotal connections in general F16C11/00) - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract A counterbalance assembly including a housing, a pivot nose, and a spring pack. The housing including a front housing wall having a first housing edge and a second housing edge opposite the first housing edge, a first housing side wall projecting from the first housing edge and having a first retaining slot, and a second housing side wall oppositely disposed relative to the first housing side wall, projecting from the second housing edge and having second retaining slot in registered alignment with the first retaining slot. The pivot nose including a front pivot nose wall having a first pivot nose edge and a second pivot nose edge opposite the first pivot nose edge, a first pivot nose side wall projecting from the first pivot nose edge and having a first pivot nose through hole, and a second pivot nose side wall oppositely disposed relative to the first pivot nose side wall, projecting from the second pivot nose edge and having a second pivot nose through hole, the first and second pivot nose through holes are in registered alignment with the first and second retaining slot. The spring pack disposed within a volume formed by the housing and including a first end engaged with the housing, a second end engaged with the pivot nose, and an energy storage device arranged between the first and second ends. ## Claims ### Claim 1 A counterbalance assembly comprising: a housing comprising: a front housing wall comprising a first housing edge and a second housing edge opposite the first housing edge; a first housing side wall projecting from the first housing edge and comprising a first retaining slot; and, a second housing side wall oppositely disposed relative to the first housing side wall, projecting from the second housing edge and comprising second retaining slot in registered alignment with the first retaining slot; a pivot nose comprising: a front pivot nose wall comprising a first pivot nose edge and a second pivot nose edge opposite the first pivot nose edge; a first pivot nose side wall projecting from the first pivot nose edge and comprising a first pivot nose through hole; and, a second pivot nose side wall oppositely disposed relative to the first pivot nose side wall, projecting from the second pivot nose edge and comprising a second pivot nose through hole, the first and second pivot nose through holes are in registered alignment with the first and second retaining slot; and, a spring pack disposed within a volume formed by the housing and comprising: a first end engaged with the housing; a second end engaged with the pivot nose; and, an energy storage device arranged between the first and second ends. ### Claim 2 (depends on 1) The counterbalance assembly of claim 1 wherein the housing further comprises: a cross bridge arranged between the first and second housing side walls and to engage the first end of the spring pack. ### Claim 3 (depends on 2) The counterbalance assembly of claim 2 wherein the cross bridge further comprises a pair of recessed channels and the first end of the spring pack comprises a pivot plate having a pair of embossed tabs arranged to pivotally engage the pair of recessed channels. ### Claim 4 (depends on 2) The counterbalance assembly of claim 2 wherein the housing further comprises a pair of parallel slots in each of the first and second housing side walls and the cross bridge comprises a plurality of tab hooks arranged to slidingly engage the pairs of parallel slots in the first and second housing side walls, wherein the cross bridge is arranged to prevent inward movement of the first and second housing side walls and the plurality of tab hooks are arranged to prevent outward movement of the first and second housing side walls. ### Claim 5 (depends on 1) The counterbalance assembly of claim 1 wherein the housing further comprises: a first housing mounting plate comprising a first mounting tab and a first mounting plate through hole; and, a second housing mounting plate comprising a second mounting tab and a second mounting plate through hole, wherein the first and second mounting plate through holes, the first and second pivot nose through holes and the first and second retaining slot are in registered alignment. ### Claim 6 (depends on 5) The counterbalance assembly of claim 5 wherein the pivot nose further comprises a limit pin, each of the first and second pivot nose side walls comprises a limit through hole, each of the first and second housing mounting plates further comprises an arcuate slot, and the limit pin is arranged in the limit through holes of the first and second pivot nose side walls and each end of the limit pin extends into the arcuate slots of the first and second housing mounting plates. ### Claim 7 (depends on 6) The counterbalance assembly of claim 6 wherein the second end of the spring pack engages the limit pin. ### Claim 8 (depends on 5) The counterbalance assembly of claim 5 wherein the first and second mounting plates are fixedly secured to inner surfaces of the first and second housing side walls, respectively. ### Claim 9 (depends on 1) The counterbalance assembly of claim 1 wherein each of the pivot nose side walls comprises a mounting tab.