# US 12,178,447 B2 · Blood flow restriction belts and system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,178,447 B2 - Document ID: US12178447B2 - Status: Granted - Kind: B2 - Application number: 18/347,925 - Filed: 2023-07-06 - Published: 2023-11-09 - Granted: 2024-12-31 - Earliest claimed: 2016-02-10 - Applicants: Robert Tremaine Whalen; Sean Tremaine Whalen; James Stray-Gundersen - Inventors: Robert Tremaine Whalen; Sean Tremaine Whalen; James Stray-Gundersen - Web page: https://patentgrep.com/patent/US12178447B2 ## CPC - A61B 17/135: inflatable - A61B 17/12009: {Implements for ligaturing other than by clamps or clips, e.g. using a loop with a slip knot} - A61B 17/1204: {temporary occlusion} - A61B 17/1322: {comprising a flexible encircling member (A61B17/135 takes precedence)} - A61B 17/1355: {Automated control means therefor} - A61H 9/0092: {Cuffs therefor} - A61H 11/00: Belts, strips or combs for massage purposes - A41D 2600/10: for sport activities - A41F 9/02: Expansible or adjustable belts or girdles {; Adjustable fasteners comprising a track and a slide member (A41F1/008, A41F9/002 take precedence)} - A61H 2201/169: Physical characteristics of the surface, e.g. material, relief, texture or indicia - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61H: PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY (electrotherapy, magnetotherapy, radiation therapy or ultrasound therapy A61N) - A41D: OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES - A41F: GARMENT FASTENINGS; SUSPENDERS ## Abstract An inflatable belt 100 for use in a BFR system with an outer belt material 102 hermetically sealed to an inner belt material 101 along a perimeter, thereby forming at least one inflatable chamber 103, the inflatable chamber having an input port 104 for accepting a gas into the chamber, the inflatable belt further comprising a first fastening means 110 in communication with the outer belt material, for attaching to a second fastening means 111 in communication with the outer belt material, thereby locking a circumference of the inflatable belt when wrapped around a user's limb, the inflatable belt providing sufficient volume and compliance so as to reduce spikes in pressure and thereby improve comfort and safety of the inflatable belt for use in restriction of blood flow for muscle development. ## Claims ### Claim 1 A belt for securing to a body segment, the belt comprising: an inner belt material; an outer belt material, wherein the inner belt material has a higher degree of elasticity than the outer belt material, and wherein the inner belt material and the outer belt material are connected along a perimeter to form a substantially airtight gas bladder for accepting a gas; an input port in communication with the gas bladder, wherein the input port comprises a tube heat sealed between the inner belt material and the outer belt material; an elastic belt fastening means for fastening the belt around the body segment, wherein the belt fastening means comprises a first fastening means associated with a first end of the belt and a second fastening means associated with a second end of the belt, and the first fastening means is attachable to the second fastening means to limit an initial circumference of the belt when wrapped around the body segment; at least one neoprene body interfacing component configured to locate the belt exterior to the body segment by a distance of at least about 1.5 mm and less than about 5 mm prior to inflation of the gas bladder; a loop coupler associated with an end of the belt; a positive locking means in communication with the first fastening means; a positive lock adjustment at a length along the first fastening means; and a stop mechanism associated with one of the first fastening means or the second fastening means which prevents the associated fastening means from exiting the loop coupler, keeping the belt in a substantially ring-like shape. ### Claim 2 (depends on 1) The belt of claim 1, wherein the stop mechanism comprises a bar which mechanically interferes with the loop coupler. ### Claim 3 (depends on 1) The belt of claim 1, further comprising a non-removable electromechanical pump in communication with the belt. ### Claim 4 (depends on 3) The belt of claim 3, further comprising a microprocessor, wherein: the microprocessor is configured to store instructions for the electromechanical pump, the microprocessor is configured to communicate with the electromechanical pump, the microprocessor is configured to receive instructions from an external computer, and the external computer comprises a PC, phone, or tablet. ### Claim 5 (depends on 4) The belt of claim 4, wherein the microprocessor is configured to receive instructions from the external computer via wireless communication. ### Claim 6 (depends on 4) The belt of claim 4, wherein the microprocessor is configured to receive user feedback. ### Claim 7 (depends on 1) The belt of claim 1, wherein the outer belt material is machine washable, wherein the inner belt material comprises polyurethane coated nylon stretch fabric, wherein the body segment is a limb, and wherein the gas bladder is configured to cover at least 30% of a user's limb circumference. ### Claim 8 (depends on 7) The belt of claim 7, wherein the gas bladder is not configured to cover the user's entire limb circumference, and wherein the gas bladder is configured to only apply compression to a specific region on the limb. ### Claim 9 (depends on 7) The belt of claim 7, wherein a length of the gas bladder is equal to the length of the smallest limb circumference of the expected user such that the gas bladder never overlaps itself. ### Claim 10 (depends on 1) The belt of claim 1, wherein the belt further comprises: a pressure readout device; and an automated pressure relief mechanism comprising a pressure limiting valve. ### Claim 11 (depends on 10) The belt of claim 10, wherein the automated pressure relief mechanism is combined with a manual relief mechanism to form a pressure relief valve combo, wherein the automated pressure relief mechanism comprises an adjustable cap which is configured to compress a spring which in turn pushes a pressure relief plunger to sandwich an o-ring between the pressure relief plunger and a pressure relief valve body to create an airtight seal, and wherein the pressure readout device is in communication with a gas hose in between the automated pressure relief mechanism and an inflation means. ### Claim 12 (depends on 1) The belt of claim 1, wherein the belt is configured to produce an obstruction or impediment to deep venous flow coming out of the body segment. ### Claim 13 (depends on 1) The belt of claim 1, wherein the at least one neoprene body interfacing component is removable. ### Claim 14 (depends on 1) The belt of claim 1, wherein the gas bladder comprises a first circumference at a first edge of the gas bladder and a second circumference at a second edge of the gas bladder, and wherein the first circumference is greater than the second circumference. ### Claim 15 (depends on 1) The belt of claim 1, wherein the gas bladder comprises additional anti roll features on either side configured to prevent the belt from moving on the user's limb during inflation, muscle contraction, and exercise. ### Claim 16 (depends on 1) The belt of claim 1, further comprising notched markings, wherein the notched markings correspond to a pre-calculated table that links specific body segment girths with a specific notched marking. ### Claim 17 (depends on 1) The belt of claim 1, further comprising reflective edging.