Patents by Inventor David Aperahama Calvert
David Aperahama Calvert has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240068196Abstract: A wedge locking element (10) for a locking device of a quick coupler A for coupling the pin P2 of an attachment to earth working machinery. The wedge locking element (10) has a sloping wedge surface (13). Projecting from the wedge surface (13) is an engagement surface (12) with which the attachment pin P2 can engage but not apply any substantial driving force to the wedge locking element (10) in the event of failure of a force maintaining the wedge locking element (10) in a position where the pin P2 is retained with the coupler A. The pin engagement surface (12) lies in a plane that is substantially in line with the direction in which the locking element (10) is, in use, moved by the driving force.Type: ApplicationFiled: November 6, 2023Publication date: February 29, 2024Inventors: Michael Hugh James RIDER, Andrew James Phillip RIDER, David Aperahama CALVERT, Matthew James CALVERT, Andre Richard ANDERSON
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Patent number: 11846083Abstract: A wedge locking element (10) for a locking device of a quick coupler A for coupling the pin P2 of an attachment to earth working machinery. The wedge locking element (10) has a sloping wedge surface (13). Projecting from the wedge surface (13) is an engagement surface (12) with which the attachment pin P2 can engage but not apply any substantial driving force to the wedge locking element (10) in the event of failure of a force maintaining the wedge locking element (10) in a position where the pin P2 is retained with the coupler A. The pin engagement surface (12) lies in a plane that is substantially in line with the direction in which the locking element (10) is, in use, moved by the driving force.Type: GrantFiled: December 1, 2016Date of Patent: December 19, 2023Assignee: WEDGELOCK EQUIPMENT LIMITEDInventors: Michael Hugh James Rider, Andrew James Phillip Rider, David Aperahama Calvert, Matthew James Calvert, Andre Richard Anderson
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Publication number: 20220381000Abstract: Quick couplers release one attachment and quickly attach another attachment to the end of the arm. Different attachments are available with differing widths. The attachments comprise of a front and a back pin that are able to engage with the quick coupler. The front pin and/or the back pin are preferably presented mounted to side plates that are secured to the bucket of the attachment. The spacing between the side plates may vary from attachment to attachment. The present invention is a packer that is able to engage with a quick coupler so as to prevent slop when attachments narrower than the quick coupler are used.Type: ApplicationFiled: October 29, 2020Publication date: December 1, 2022Applicant: WEDGELOCK EQUIPMENT LIMITEDInventors: David Aperahama CALVERT, Matthew James CALVERT
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Patent number: 10280588Abstract: A coupler is configured to couple an implement to an earth moving or materials handling machine. The coupler includes a locking member for locking a pin of an implement into a coupler in the recess. The locking member is driven by a hydraulic arrangement, with the hydraulic cylinder body being formed integrally with either the coupler body or the locking member. The coupler may be adapted to accommodate a range of implement pin spacings and/or diameters, so that the coupler can be used with different implements and in particular with different makes of implement.Type: GrantFiled: January 4, 2018Date of Patent: May 7, 2019Assignee: Cascade CorporationInventors: Matthew James Calvert, David Aperahama Calvert
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Publication number: 20180355579Abstract: A wedge locking element (10) for a locking device of a quick coupler A for coupling the pin P2 of an attachment to earth working machinery. The wedge locking element (10) has a sloping wedge surface (13). Projecting from the wedge surface (13) is an engagement surface (12) with which the attachment pin P2 can engage but not apply any substantial driving force to the wedge locking element (10) in the event of failure of a force maintaining the wedge locking element (10) in a position where the pin P2 is retained with the coupler A. The pin engagement surface (12) lies in a plane that is substantially in line with the direction in which the locking element (10) is, in use, moved by the driving force.Type: ApplicationFiled: December 1, 2016Publication date: December 13, 2018Inventors: Michael Hugh James RIDER, Andrew James Phillip RIDER, David Aperahama CALVERT, Matthew James CALVERT, Andre Richard ANDERSON
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Publication number: 20180127947Abstract: A coupler is configured to couple an implement to an earth moving or materials handling machine. The coupler includes a locking member for locking a pin of an implement into a coupler in the recess. The locking member is driven by a hydraulic arrangement, with the hydraulic cylinder body being formed integrally with either the coupler body or the locking member. The coupler may be adapted to accommodate a range of implement pin spacings and/or diameters, so that the coupler can be used with different implements and in particular with different makes of implement.Type: ApplicationFiled: January 4, 2018Publication date: May 10, 2018Applicant: Cascade CorporationInventors: Matthew James Calvert, David Aperahama Calvert
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Patent number: 9863117Abstract: A coupler is configured to couple an implement to an earth moving or materials handling machine. The coupler includes a locking member for locking a pin of an implement into a coupler in the recess. The locking member is driven by a hydraulic arrangement, with the hydraulic cylinder body being formed integrally with either the coupler body or the locking member. The coupler may be adapted to accommodate a range of implement pin spacings and/or diameters, so that the coupler can be used with different implements and in particular with different makes of implement.Type: GrantFiled: March 6, 2009Date of Patent: January 9, 2018Assignee: Cascade CorporationInventors: Matthew James Calvert, David Aperahama Calvert
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Patent number: 8347974Abstract: A safety locking device 18 for a quick hitch/coupler 10 of an earth working machine. The safety locking device 18 has a locking element 21 which is biased into a locking position to automatically lock a front pin of an implement when it is engaged in the hook 14 of the coupler 10. The safety locking device 18 has an hydraulic operable mechanism to move the locking element 21 to an unlocking position. The hydraulic supply to the safety locking device 18 is independent of the hydraulic supply to a locking mechanism 16 of the coupler 10.Type: GrantFiled: September 28, 2010Date of Patent: January 8, 2013Inventors: Matthew James Calvert, David Aperahama Calvert
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Publication number: 20110010915Abstract: A safety locking device 18 for a quick hitch/coupler 10 of an earth working machine. The safety locking device 18 has a locking element 21 which is biased into a locking position to automatically lock a front pin of an implement when it is engaged in the hook 14 of the coupler 10. The safety locking device 18 has an hydraulic operable mechanism to move the locking element 21 to an unlocking position. The hydraulic supply to the safety locking device 18 is independent of the hydraulic supply to a locking mechanism 16 of the coupler 10.Type: ApplicationFiled: September 28, 2010Publication date: January 20, 2011Applicant: WEDGELOCK LLCInventors: Matthew James CALVERT, David Aperahama CALVERT
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Patent number: 7828070Abstract: A safety locking device 18 for a quick hitch/coupler 10 of an earth working machine. The safety locking device 18 has a locking element 21 which is biased into a locking position to automatically lock a front pin of an implement when it is engaged in the hook 14 of the coupler 10. The safety locking device 18 has an hydraulic operable mechanism to move the locking element 21 to an unlocking position. The hydraulic supply to the safety locking device 18 is independent of the hydraulic supply to a locking mechanism 16 of the coupler 10.Type: GrantFiled: May 2, 2007Date of Patent: November 9, 2010Assignee: Wedgelock LLCInventors: Matthew James Calvert, David Aperahama Calvert
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Publication number: 20100232920Abstract: A coupler is configured to couple an implement to an earth moving or materials handling machine. The coupler includes a locking member for locking a pin of an implement into a coupler in the recess. The locking member is driven by a hydraulic arrangement, with the hydraulic cylinder body being formed integrally with either the coupler body or the locking member. The coupler may be adapted to accommodate a range of implement pin spacings and/or diameters, so that the coupler can be used with different implements and in particular with different makes of implement.Type: ApplicationFiled: March 6, 2009Publication date: September 16, 2010Inventors: Matthew James Calvert, David Aperahama Calvert