# US 12,109,424 B2 · Medical device battery retention and ejection element > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,109,424 B2 - Document ID: US12109424B2 - Status: Granted - Kind: B2 - Application number: 17/162,876 - Filed: 2021-01-29 - Published: 2021-08-05 - Granted: 2024-10-08 - Earliest claimed: 2020-01-31 - Assignees: Physio-Control, Inc. - Applicants: Physio-Control, Inc. - Inventors: Jeremy Edward Brummett; Neal Stanley Clark; Steven Chester; Ethan Boehm; Kathy Wang; Alexander Hamilton - Web page: https://patentgrep.com/patent/US12109424B2 ## CPC - A61N 1/3968: {Constructional arrangements, e.g. casings (A61N1/375 takes precedence)} - A61N 1/3904: {External heart defibrillators [EHD]} - A61N 1/3975: {Power supply (A61N1/378 takes precedence)} - B21D 5/00: Bending sheet metal along straight lines, e.g. to form simple curves (B21D11/06 - B21D11/18 take precedence; corrugating sheet metal B21D13/00; as edge treatment B21D19/00) - B21D 28/26: in sheets or flat parts - B21D 53/36: clips, clamps, or like fastening or attaching devices, e.g. for electric installation - H01M 50/233: characterised by physical properties of casings or racks, e.g. dimensions - H01M 50/244: Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method - H01M 50/247: specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers - H01M 50/262: with fastening means, e.g. locks - H01M 50/264: for cells or batteries, e.g. straps, tie rods or peripheral frames - H01M 50/202: Casings or frames around the primary casing of a single cell or a single battery - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - Y02E 60/10: Energy storage using batteries - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Systems to retain a battery within, and to eject a battery from, a battery receptacle of a medical device, such as a portable defibrillator, are described. A battery receptacle of a medical device includes an element that is configured to engage an inserted battery to prevent, or reduce, movement of the battery within the receptacle and to assist with removing the battery from the receptacle. In an example, the element is a monolithic structure that includes a retention portion and an ejection portion. The retention portion is positioned at a side wall of the battery receptacle, and the ejection portion terminates in a free end positioned a distance from the side wall. When the battery is inserted into the battery receptacle, the retention portion exerts a retention force on a side surface of the battery, and the ejection portion exerts an ejection force on an end surface of the battery. ## Claims ### Claim 1 A portable defibrillator comprising: a battery receptacle configured to receive a battery; and an element positioned within the battery receptacle, wherein the element is a monolithic structure and comprises: a retention portion having a curvature and positioned at a side wall of the battery receptacle and configured to contact, and exert a retention force on, a side surface of the battery when the battery is inserted into the battery receptacle; an ejection portion that terminates in a free end positioned a distance from the side wall, wherein the free end of the ejection portion has a rolled lip and is configured to contact, and exert an ejection force on, an end surface of the battery when the battery is inserted into the battery receptacle; a bent portion interposed between the retention portion and the ejection portion, the bent portion causing the ejection portion to be oriented at an acute angle relative to the retention portion prior to insertion of the battery into the battery receptacle; and a mounting portion configured to mount the element to the side wall of the battery receptacle via a hole defined in the mounting portion, wherein the retention portion is interposed between the mounting portion and the bent portion. ### Claim 2 (depends on 1) The portable defibrillator of claim 1, wherein: a concave surface of the bent portion faces the battery when the battery is inserted into the battery receptacle; and a convex surface of the retention portion faces the battery when the battery is inserted into the battery receptacle. ### Claim 3 (depends on 1) The portable defibrillator of claim 1, wherein: the free end of the ejection portion is movable; and the ejection portion is configured to be oriented at a second angle relative to the retention portion when the battery is inserted into the battery receptacle, the second angle greater than the acute angle. ### Claim 4 (depends on 1) The portable defibrillator of claim 1, wherein the monolithic structure is made of spring steel. ### Claim 5 (depends on 1) The portable defibrillator of claim 1, wherein the retention portion is configured to deflect away from the side wall of the battery receptacle in response to a deflection of the free end of the ejection portion when the battery is inserted into the battery receptacle. ### Claim 6 (depends on 1) The portable defibrillator of claim 1, wherein the retention portion and the ejection portion are each: configured to deflect from an initial position when the battery is inserted into the battery receptacle; and biased to return to the initial position when the battery is removed from the battery receptacle. ### Claim 7 An element configured to be disposed within a battery receptacle of a portable defibrillator, wherein the element is a monolithic structure and comprises: a retention portion to be positioned at a side wall of the battery receptacle, the retention portion configured to contact a battery and to exert a retention force on a side surface of the battery in a first direction when the battery is inserted into the battery receptacle; and an ejection portion oriented at an acute angle relative to the retention portion, wherein the ejection portion terminates in a free end to be positioned a distance from the side wall of the battery receptacle, the free end of the ejection portion configured to contact the battery and to exert an ejection force on an end surface of the battery in a second direction different than the first direction when the battery is inserted into the battery receptacle. ### Claim 8 (depends on 7) The element of claim 7, further comprising a bent portion interposed between the retention portion and the ejection portion, wherein the bent portion causes the ejection portion to be oriented at the acute angle relative to the retention portion. ### Claim 9 (depends on 7) The element of claim 7, wherein: the free end of the ejection portion is movable; and the ejection portion is configured to be oriented at a second angle relative to the retention portion when the battery is inserted into the battery receptacle, the second angle greater than the acute angle. ### Claim 10 (depends on 8) The element of claim 8, further comprising a mounting portion configured to mount the element within the battery receptacle, wherein the retention portion is interposed between the mounting portion and the bent portion. ### Claim 11 (depends on 7) The element of claim 7, wherein the retention portion: has a curvature; and is configured to deflect away from the side wall of the battery receptacle in response to a deflection of the free end of the ejection portion when the battery is inserted into the battery receptacle. ### Claim 12 (depends on 7) The element of claim 7, wherein the monolithic structure is made of spring steel. ### Claim 13 (depends on 7) The element of claim 7, wherein the free end of the ejection portion has a rolled lip. ### Claim 14 (depends on 7) The element of claim 7, further comprising a mounting portion configured to mount the element within the battery receptacle, wherein the retention portion comprises a pair of flat springs, each flat spring of the pair of flat springs extending at an angle from the mounting portion at the side wall of the battery receptacle and terminating at an additional free end. ### Claim 15 (depends on 7) The element of claim 7, wherein the retention portion and the ejection portion are each: configured to deflect from an initial position when the battery is inserted into the battery receptacle; and biased to return to the initial position when the battery is removed from the battery receptacle. ### Claim 16 (depends on 10) The element of claim 10, wherein the mounting portion is configured to mount the element to the side wall of the battery receptacle via a hole defined in the mounting portion. ### Claim 17 (depends on 16) The element of claim 16, wherein the hole is configured to receive a fastener to mount the element to the side wall of the battery receptacle. ### Claim 18 (depends on 8) The element of claim 8, wherein: a concave surface of the bent portion faces the battery when the battery is inserted into the battery receptacle; the retention portion has a curvature; and a convex surface of the retention portion faces the battery when the battery is inserted into the battery receptacle. ### Claim 19 (depends on 10) The element of claim 10, wherein the retention portion tapers lengthwise along the element from the mounting portion to the bent portion. ### Claim 20 (depends on 8) The element of claim 8, wherein the bent portion includes an opening defined in a center of the bent portion.