WO2014152150A1

WO2014152150A1 - Materials and methods for use with climbing cams

Info

Publication number: WO2014152150A1
Application number: PCT/US2014/027010
Authority: WO
Inventors: Matthew Michael GLANZER
Original assignee: Cam-Keeper, Llc
Priority date: 2013-03-14
Filing date: 2014-03-14
Publication date: 2014-09-25

Abstract

Provided are methods and devices for spring loaded camming device (SLCD) trigger retention and stabilization of cam retraction. Devices are described for use with camming devices in rock climbing to maintain cam lobes in a retracted position until placed. The devices aid in SLCD use, make installation of cams in cracks faster and easier, minimize gear entanglement, increase SLCD placement range, and make selection of SLCD size more intuitive for climbers during ascents.

Description

TITLE

MATERIALS AND METHODS FOR USE WITH CLIMBING CAMS

Inventor: Matthew Michael Glanzer

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to United States Provisional Application Number 61/785,364, filed on March 14, 2013, the entire disclosure of which is expressly incorporated herein by reference for all purposes.

BACKGROUND OF THE INVENTION

[0002] In the sport of rock climbing, removable anchoring devices are often placed to secure a safety rope. One type of anchoring device is a spring loaded camming device (SLCD). A SLCD may also be called a camming device, a cam, an active protection device, or a friend.

[0003] SLCDs typically include a head that has three or four cam lobes rotating on an axle, a stem attached to the head at or near the axle, and may have a loop of rope or webbing attached to the stem at the opposite end from the head. SLCDs typically have springs in the head that bias the cam lobes to rotate outward, against the rock, and a trigger mechanism on the stem, or between the stem and the head, that allows the climber to retract the cam lobes for placement into the crack or pocket, and for removal. Upon release of the trigger, the cam lobes rotate outward until contacting surfaces, such as the sides of a rock crack, or until fully expanded.

[0004] The cam lobes have an outer curve that is typically substantially spiral or elliptically shaped. A pull on the stem, such as when arresting a fall, is transferred to a pull on the axles which causes the cam lobes to rotate outward and expand, increasing the force against the sides of the crack. In contrast, a pull on the trigger is transferred to a pull on the cam lobes, not at the axle, which causes the cams to rotate inward and retract. SLCDs use multiple pivoting cam lobes which are spring-biased toward an open position.

[0005] To position the SLCD, the climber pulls a trigger retracting the cams until the SLCD head fits within the rock crack or crevice. The climber then releases the trigger and the springs expand, pushing the cam lobes, of the SLCD head, outward against the rock surface. A rope can be attached to the stem. A pull on the rope, such as that generated by a climber falling, will cause a properly placed SLCD to convert the pulling force along the stem of the unit into outward pressure on the rock, preventing the removal of the unit from the rock. Static friction force between the camming device and the rock face counteracts the applied load. [0006] Examples of camming devices are described in US Patents 7959119, 7802770, 6679466, 5860629, 4645149, and 4184657.

[0007] A climber may carry a number of SLCDs on a climb. During the climb, while perched on a steep rock face, a climber will select a SLCD from several devices of different sizes. The climber will then position the SLCD in an appropriate configuration in a rock crevice while holding the trigger to keep the cams of the SLCD in a retracted position until the SLCD is properly placed. To aid this maneuver, climbers may use a stick or cord to aid in retracting the trigger and may hold the SLCD in their mouth to adjust their grip and better engage the trigger.

[0008] Devices have been designed to actuate the SLCD trigger mechanism in the removal of a SLCD that has worked its way into a crevice beyond easy reach; for example US Patents 6810994 and 7708246. However there remains a need for a device for aiding in SLCD placement and carrying.

[0009] Accordingly, there is a need for a trigger retention device to aid in SLCD use, make installation of cams in cracks faster and easier, minimize gear entanglement, increase SLCD placement range, and make selection of SLCD size more intuitive for climbers during ascents.

SUMMARY OF THE INVENTION

[0010] Provided are methods and devices for spring loaded camming device (SLCD) trigger retention and stabilization of cam retraction. Also provided are enhancements to aid in SLCD use.

[0011] In a first broad aspect, there are provided herein devices and methods for retaining cam lobes of spring loaded camming devices (SLCDs) in a retracted position until released.

[0012] Embodiments of the present invention include control mechanisms, adapted for use in maintaining the cam lobes of a spring-loaded camming device (SLCD) in a retracted position until such time as a user desires to release the SLCD from the retracted position, comprising: a catchment, wherein the catchment is adapted to maintain the cam lobes of the SLCD in a retracted position by engaging a first structure of the SLCD with a second structure of the SLCD, wherein the first structure is selected from the group consisting of: a gear-loop spacer bar, a gear-loop, a stem, and a safety attachment point; and wherein the second structure is selected from a trigger, a cam lobe, a cable, and an axle; and a release lever adapted to receive input from the user, wherein the input from the user causes the catchment to release the first structure from the second structure, thereby permitting movement of the cam lobes from the retracted position towards an expanded position. [0013] Embodiments of the present invention provide control mechanisms for use with SLCDs, the SLCDs having a trigger adapted to cause rotation of a plurality of cam lobes of the SLCD to move between an expanded position and a retracted position, the control mechanism comprising: a trigger catchment carried by the SLCD and adapted to releasably retain the trigger of the SLCD in a first position, wherein the cam lobes of the SLCD are in the retracted position; and a trigger release lever, which is operative to release the trigger from the trigger catchment such that cam lobes move towards a second position, wherein the cam lobes of the SLCD are in the expanded position.

[0014] In certain embodiments, the catchment is selected from one or more of: a hook, a barb, a clip, a lanyard, a loop, a strap, a stop plate, a pin, a stud, a snap, a pocket, a slot, a notch, a sleeve, a pinch-catch, a button, an eccentric sheer plate, and a tooth. In certain embodiments, a control mechanism apparatus releasably couples the trigger to a part of the SLCD selected from the set consisting of: stem, gear loop, axle, lanyard, and spacer bar. In certain embodiments the catchment is integrated into the SLCD. In certain embodiments the catchment is removably attached to the SLCD. In certain embodiments a method of attachment to the SLCD is chosen from the group consisting of: snap-on, clamp, adhesive, lanyard, and lashing.

[0015] In certain embodiments, the SLCD is a single-stem SLCD. In certain embodiments, the SLCD is a dual-stem SLCD. In certain embodiments, the SLCD is a flexible stem SLCD.

[0016] Embodiments of the present invention provide methods of using a SLCD, the methods comprising: positioning a plurality of cam lobes on a cam head of a SLCD in a retracted position by retracting a trigger of the SLCD; engaging a coupling between the trigger and another part of the SLCD, whereby the cam lobes are retained in the retracted position;

positioning the SLCD in a rock feature; and releasing the coupling.

[0017] Embodiments of the present invention provide methods of using SLCDs, the methods comprising: positioning a plurality of cam lobes on a cam head of a SLCD in a retracted position by retracting a trigger of the SLCD; engaging a coupling between the trigger and another part of the SLCD, whereby the cam lobes are retained in the retracted position; and releasing the coupling using a lever integrated into the coupling.

[0018] In certain embodiments, the releasing or decoupling is performed with one finger. In certain embodiments, cam lobes of the SLCD are set in a retracted position before initiating an ascent. In certain embodiments, the coupling or decoupling is accompanied by a snapping sound. In certain embodiments, the release of the coupling is accompanied by a haptic feedback vibration. In certain embodiments the release lever is oriented to indicate the relative positions of the inner or outer cam lobes.

[0019] In certain embodiments, the retracted position of the cam lobes is a position of the cam lobes with less than 40% of active cam range remaining. In certain embodiments, the retracted position of the cam lobes is a position of the cam lobes with 50-100% of expansion range remaining. In certain embodiments, the retracted position of the cam lobes is a position of the cam lobes with 75-100% of expansion range remaining.

[0020] In certain embodiments the material of the catchment or control mechanism is light weight. In certain embodiments, light weight construction material is less dense than water. In some embodiments it is no more than 20% heavier than water. In some embodiments the control mechanism weighs between 10-lOOg. In some embodiments it is formed from a single material. In some embodiments it is injection molded plastic. In some embodiments the material is reinforced with fibers. In some embodiments the material is luminescent, colored, coated with a uv protective layer, applied with non-slip coating, or shaped to have slip- resistant surfaces. In certain embodiments a specific color shade is used, or associated with, a specific size control mechanism or a specific size, or camming range, of the SLCD to which the control mechanism is coupled.

[0021] In certain embodiments the control mechanism is integrated with one or more of: a light, a coupling or engagement sensor, a decoupling or disengagement sensor, a stress transducer, a timer, a piezoelectric transducer, a radio frequency identification tag, a label, and an identification plaque.

[0022] Various aspects of this invention will become apparent to those skilled in the art from the following detailed description of embodiments of the invention, when read in light of the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The invention will be better understood and its numerous objects and advantages will be apparent by reference to the following detailed description of the invention when taken in conjunction with the following drawings, in which like numerals represent like members.

[0024] FIGS. 1A-1E show examples of trigger retention attachments for a single stem SLCD.

[0025] FIG. 1A is a front perspective view of a trigger retention attachment.

[0026] FIG. IB is a back view of a trigger retention attachment.

[0027] FIG. 1C is a view of a trigger retention attachment on an SLCD in an expanded configuration.

[0028] FIG. ID is a view of a trigger retention attachment on an SLCD in a retracted configuration showing the trigger retained by the attachment.

[0029] FIG. IE is a side view of an alternate embodiment of a trigger retention attachment.

[0030] FIGS. 2A-2N show examples of integrated trigger retention mechanisms for a single stem SLCD.

[0031] FIG. 2 A is a view of a trigger segment of a SLCD with a push-button release.

[0032] FIG. 2B is a cross-section of the trigger segment of Fig. 2A of a SLCD with a pushbutton release.

[0033] FIG. 2C is a view of a trigger segment of a SLCD with a catch hook on the trigger.

[0034] FIG. 2D is a view of a trigger segment of a SLCD with a stud and hole retention mechanism.

[0035] FIG. 2E is a view of a SLCD in an expanded position with a pin and cam lobe pinhole retention mechanism.

[0036] FIG. 2F is a view of a SLCD in a retracted position with a pin and cam-lobe pinhole retention mechanism.

[0037] FIG. 2G is a view of a trigger segment of a SLCD with an eccentric shear bar-clamp mechanism.

[0038] FIG. 2H is a bottom perspective view of the trigger segment of a SLCD with an eccentric shear bar-clamp mechanism as shown in Fig. 2G.

[0039] FIG. 21 is a cross-section of the trigger segment of a SLCD with an eccentric shear bar-clamp mechanism as shown in Fig. 2G.

[0040] FIG. 2J is a perspective view of a segment of a SLCD gear loop with a strap-hook trigger retention mechanism not engaged with the trigger.

[0041] FIG. 2K is a front view of a trigger segment of a SLCD with a strap-hook trigger retention mechanism engaged with the trigger.

[0042] FIG. 2L is a side view of the trigger segment, as shown in Fig. 2K, of a SLCD with a strap-hook trigger retention mechanism engaged with the trigger.

[0043] FIG. 2M is a perspective view of a trigger segment of a SLCD with a split-strap trigger retention mechanism not engaged with the trigger.

[0044] FIG. 2N is a view of a segment of a SLCD gear loop with a split-strap trigger retention mechanism, as shown in Fig. 2M, with the trigger engaged.

[0045] FIGS. 3A-3E show examples of trigger retention attachments for a dual stem SLCD.

[0046] FIG. 3A is a view of a trigger retention attachment on a dual-stem SLCD in an expanded configuration.

[0047] FIG. 3B is a view of a trigger retention attachment for use with a dual stem SLCD. [0048] FIG. 3C is a front view of a trigger segment of a dual-stem SLCD with a trigger retention mechanism.

[0049] FIG. 3D is a cross-section side view of the trigger segment, as shown in Fig. 3C of a dual-stem SLCD with a trigger retention mechanism engaged.

[0050] FIG. 3E is a cross-section side view of a trigger segment of a dual-stem SLCD with a trigger retention mechanism released.

[0051] FIGS. 4A-4C show examples of integrated trigger retention mechanisms for dual stem

SLCDs.

[0052] FIG. 4A is a front view of a strap-hook trigger retention mechanism on a segment of a dual-stem SLCD gear loop engaged with the trigger bar.

[0053] FIG. 4B is a cross-section side view of the strap-hook trigger retention mechanism on a segment of a dual-stem SLCD gear loop as shown in Fig. 4A.

[0054] FIG. 4C is a front view of a pinch-release trigger retention mechanism on a segment of a dual-stem SLCD.

[0055] FIGS. 5A-5I show features for implementation with the device.

[0056] FIG. 5A is a view of a trigger retention attachment with a push button.

[0057] FIG. 5B is a view of a trigger retention attachment with a light emitting diode (LED), a circuit board, and a battery.

[0058] FIG. 5C is a view of a trigger retention attachment with a stress transducer.

[0059] FIG. 5D is a view of a trigger retention attachment with an internal cable.

[0060] FIG. 5E is a view of a trigger retention attachment with pressure sensors.

[0061] FIG. 5F is a view of a trigger retention attachment with pressure sensors in an alternate placement.

[0062] FIG. 5G is a view of a trigger retention attachment with a piezoelectric transducer.

[0063] FIG. 5H is a view of a trigger retention attachment with a piezoelectric cable.

[0064] FIG. 51 is a view of a trigger retention attachment with a personalization area.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)

[0065] The sport of rock climbing is technically challenging; requiring strength, skill, and focus. A feature of the present invention is to provide methods and devices for SLCD ease of use and to aid in efficient placement during climbing.

[0066] A SLCD typically includes one or more pairs of opposed cam members having eccentric outer surfaces. The cam members are pivotally mounted to one or more transverse shafts or axles in a way that allows opposed cams to pivot in opposite directions. The cams are spring-loaded and are retracted with a trigger. When the trigger is pulled, the cams rotate from their open, extended, or expanded position toward a closed, retracted, collapsed, or compressed position. The retracted camming device is then inserted into a crack in a rock, positioned, and the trigger is released. When the trigger is released the cam lobes rotate under the force of the springs back toward an expanded position until the opposed cam lobes contact the rock. Outward directed loads applied to the cam lobes, for example when a climber's fall is arrested, cause the cam lobes to push against the rock.

[0067] The devices and methods described herein relate to SLCDs, generally. SCLDs come in a variety of sizes, styles, and configurations. A SLCD may have one stem or more than one stem. The stem may be flexible or rigid. The trigger may be a handle, a hook, a loop, or a bar. The number of cams, springs, axles, and structural members may vary. The cam angle or cam rotation may vary. Other variations and modifications of the standard SLCD configurations can be used. Accordingly, examples are described with regard to particular SLCD configurations for illustration purposes, and it is to be understood that the examples are non-limiting illustrations that apply to various modifications and equivalents.

[0068] An aspect of the invention is to provide a control mechanism to keep a SLCD's cam head in the retracted position until the SLCD is placed into an anchoring position or placement, or when the user desires to release the control mechanism. The control mechanism may be implemented with one or more structures, including a catch, hook, latch, pin, lanyard, or swivel. Releasing mechanisms include manual systems such as a release latch trigger, catch, latch, pin, swivel, button, or toggle, or decoupling of a capture or entrapment mechanism by the user. Releasing mechanisms may also include automatic activation triggered by further collapse of the cam head, whether by insertion into an anchor placement or by further pulling of the trigger assembly.

[0069] SLCDs, as explained above, are designed with springs, to preload the cam lobes, typically in the cam head. These springs apply force to the cam lobes to maneuver them toward the expanded position automatically, when not otherwise prohibited. A trigger assembly is attached to the cam lobes so that when the trigger is pulled, it, in turn, pulls the cam lobes such that they rotate toward a retracted position. The cam lobes rotate between an open, expanded position to a closed, collapsed or retracted position. In the fully retracted position, 100% of the expansion range remains, and conversely, in the fully expanded position, 0% of the expansion range remains. For many of the the SLCD mechanism and embodiments described, the retracted position is when the cam lobes are 50-100% retracted and there is between 50-100% expansion range remaining. In some embodiments, retracted means less than 40% of active placement range remaining, wherein the active placement range is defined by the manufacturer of the SLCD.

[0070] Assuming the trigger mechanism is unimpeded and there are no blockages in the action, the axles, along the trigger travel or rotation of the cams, obstructions, or stoppages in the cam head; the at-rest state of the SLCD is in the expanded position. The control mechanism provides a method for maintaining a SLCD in a fully, or nearly fully, retracted position. It allows the SLCD to expand and operate as an anchoring device upon release. The control features are implemented as an integrated part of the SLCD or as a separate attachable structure or assembly for use with the SLCD. The control mechanisms are used with a wide array of SLCD styles and sizes including flexible or rigid stem SLCDs.

[0071] Example 1: Single stem SLCD trigger retention attachment

[0072] With reference to Figs. 1A-1E, a trigger retention mechanism is adapted to attach to a single-stem SLCD 110. In one embodiment, a single stem, add-on control mechanism 100 is shaped to align with and snap over the stem 107 of the SLCD 110 and mount onto the SLCD 110. Cam lobes 117, of a SLCD head 113, are rotated around axles by the pull of trigger wires 109 attached to a trigger 108. As shown in Figs. 1C-1D, the SLCD 110 also may have a gear loop 111 and strap 112.

[0073] As shown in Figs. 1A-1D, a trigger retention attachment control mechanism 100 is attached to the SLCD stem 107 with a hinge 105 and clasp 106. The control mechanism 100 has one or more catchments or catch barbs 101 and a shaft or body 104. For a unit attached between the stem 107 and trigger 108, one or more barbs 101 are ramped or angled away from the stem 107 and SLCD head 113, so that when the trigger 108 is pulled, in direction A, shown in an arrow on Fig. 1C, the trigger 108 glides across or over the catch barbs 101, thereby depressing the catch barbs 101 toward the stem 107. As the trigger 108 is pulled further, it passes the catch barbs 101, allowing the catch barbs 101 to return to their original position and catch or impede the returning motion of the trigger 108 as shown in Fig. ID. In this position, the catch barbs 101 prevent the trigger 108 from moving in direction B and returning the cam lobes 117 to an expanded position.

[0074] When the user chooses to allow the SLCD 110 to expand, for example to place the SLCD 110 as an anchor during a climb, the release lever 102 would be depressed. When the release lever 102 is pressed toward the stem, the catch barbs 101 move out of the way of the trigger 108 and the trigger 108 slides over the release ramp 103 past the catch barbs 101, in direction B, releasing the trigger 108 to return to the expanded position shown in Fig. 1C. In this embodiment as shown on Fig. IB, the back side of the release ramp 103 has a stud, bulge, or tab 115, on the release ramp 103, on the side near the stem 107 and proximate to the SLCD head 113. This tab 115 provides a fulcrum and support to facilitate the movement of the trigger 108 over the ramp 103 past the catch barbs 101. The tab 115, in conjunction with the release lever 102, provides a lifting force and action upon the trigger as the release lever 102 is depressed. Depressing the lever 102 causes the tab 115 to press against the stem 103, angling the release ramp 103. Depressing the lever 102 also causes the body 104, at the barbs 101 to deform toward the SLCD stem 107. The motion is roughly rotational centered around the opening's top edge 116. The side walls of the device deflect outward, allowing the catch barbs 101 to move out of the path of the trigger and the unimpeded trigger 108 slides over the device toward the cam heads 113. As illustrated in Fig. 1A the contact surface of the lever 102 can have surface texture providing both a design feature and a slip-resistant surface.

[0075] The embodiment shown in Figs. 1A-1D provides: a responsive and quick release of the trigger 108, a haptic response to the user via a sudden or abrupt vibration through the control mechanism 100 and SLCD 110 assembly, as well as a culminating audible notification or snap from the SLCD's suddenly released action and cam lobes collision with the end of the allowed travel and expansion range.

[0076] In the embodiment of Figs. 1A-1D, the material of the control mechanism 101 is strong, abrasion resistant, and rigid with some flexibility. The control mechanism 101 shown in Figs. 1A-1D is formed in a single piece. Thin elements, such as the hinge 105 have greater flexibility than relatively thicker regions, such as the central portion of the body 104, which are relatively more rigid. The material could include a number of compositions known in the art, such as, but not limited to, many types of plastics. Nylon 6-6 is an example of a material with an appropriate blend of strength and rigidity, with appropriate flexibility, for use in this embodiment. Ribbing and thickness can be used to provide additional rigidity and strength. Plastics may also be augmented to adjust their flexibility and strength with fillers such as fibrous glass strands or carbon fibers.

[0077] The embodiment shown in Figs. 1A-1D shows two catch barbs 101, but could be made with a single catch barb or multiple catch barbs 101. The catch barb 101 may engage automatically or manually. In particular embodiments, the catch barb 101, is located on the main body of the control mechanism 100 or on the side or in the middle of the device body 104. The catch barb shape or placement, relative to the SLCD 110 and trigger 108, is configured so that the barb or barbs 101 move away from the trigger path when the trigger 108 is pulled, or alternately, configured so that the barb or barbs 101 are positioned so as to not engage the trigger 108 unless a portion of the control mechanism 100 which it resides upon is lifted, pressed, rotated, slid, or otherwise moved into an engagement position by manual operation.

[0078] Shown in Fig. IE is an embodiment of a trigger entrapment control mechanism 100 shaped such that the top portion of the main body 104 aligns to and snaps over the stem of the SLCD 107 for the purpose of mounting the unit onto the single-stem SLCD 110. The unit is mounted above the trigger 108 and trigger path. This embodiment of a single-stem control mechanism contains an abrupt stop-plate feature 114 which rests against a surface of the trigger 108 when the trigger is holding the cam head in the retracted position. It also has a release lever 102 which can be moved, as by lifting or rotating, such that the stop-plate is removed from the path of the trigger 108 allowing the trigger 108 to return to the expanded position.

[0079] The stop catch or stop plate 114 resides on the main body 104 of the control mechanism 100. The main body 104 can move over the trigger 108 automatically once the trigger 108 is in the retracted position. Alternatively, as shown in Fig. IE, the main body 104 of the attachment may be shaped to move away from the stem 107 and trigger 108. This would require a manual movement of the main body 104 and stop plate 114 to locate the stop- plate directly over the trigger 108 once the trigger had been pulled to the retracted position. In Fig. IE and several other instances in the figures, the trigger wires are omitted from the depiction; it is to be understood that the trigger wires are present as needed for the functioning of the SLCD.

[0080] A control mechanism may attach to the SLCD by snaps, screws, adhesives, rivets, straps, wire -ties, tape, brads, cam-over, clamp or other structure. For example a clamp could have two or more segments which encircle the stem 107. A single-part sleeve could also be used. The attachment of the device to the SLCD 110 could be attached over a large proportion of the stem or in more than one place on the stem for greater stability. The device could attach to a part of the SLCD that is stable relative to the trigger movement, such as an axle or support member. The control mechanism configuration could directly engage the cam lobes 117, trigger wires 109, or engage the axle rotation, rather than engaging the trigger, to releasably impede movement of the cam lobes 117.

[0081] Example 2: Single stem SLCD integrated trigger retention

[0082] Referring to Figs. 2A-2N, several embodiments of single-stem integrated trigger retention mechanisms are described. The trigger wires are omitted from the depiction in the figures for clarity and enhanced visibility of other details for Figs. 2A-2N.

[0083] As shown in Figs. 2A-2D and Figs. 2G-2I, embodiments of a control mechanism use a catch. This mechanism is secured to, or built into, the trigger 108 and once engaged, retains the trigger 108 in the retracted position by latching or clamping onto the stem 107 or other portions of the SLCD 110, such as the gear loop 111.

[0084] As shown in Figs 2A-2B, the latching mechanism could use catch teeth 202 with matching stem teeth 202 on the stem 107, or it could employ serrations, ribbing, or blades to grip a soft covering which would be securely fastened or coated over the stem. The clamping or latching operation could be accomplished automatically, through the use of one or more spring members to force the catch teeth toward the stem and engage with the optional stem teeth or act upon the soft stem covering. As illustrated in Figs. 2A-2B, when a release button 201 is pushed, the catch teeth 203 are pushed away from the stem 107 and stem teeth 202, thereby releasing the engagement of the catch. As the catch is secured to the trigger 108, the trigger 108 is then free to travel along its movement path and release the cam lobes 117. An alternate embodiment has a latching operation set by manually moving the catch component toward the stem to engage it with the matching teeth on the stem. The engagement is released by manually moving the catch component back away from stem.

[0085] As shown in Fig. 2C, a trigger retention device utilizes a catch barb 204 integrated into the trigger 108 to latch onto the gear loop 111. A release lever 102, enables release with a single finger movement. An appropriately shaped structure for the catch barb 204 to engage with could be on any portion of the SLCD 110. An engagement feature provides adequate retention of the catch barb 204 to resist the force of the SLCD's cam springs. The selected location and engagement type is adapted to provide one or more anchor points to resist the force of the springs and maintain the cam head 113 in the retracted position. For example, the gear loop 111 or stem 107 could be used as an attachment point for a trigger catch hook in many SLCDs.

[0086] As shown in Fig. 2D, one embodiment uses a trigger 108 and a gear loop 111 with a hitch using a stud 206 and mounting pocket or mounting hole 205 mechanism. The trigger 108, in this embodiment, has a mounting hole 205 or pocket and a corresponding pin or stud 206 feature in the lower portion of the stem or upper portion of the sling loop 111. Variations include specific feature shapes to aid alignment between and engagement of the stud 206 and mounting hole 205. The stud 206 and mounting hole 205 locations may be reversed such that the stud feature is in the trigger unit and the mounting hole in the distal region of the SLCD 110 so as to maintain the cam head 113 in the retracted position when the features are mated or engaged.

[0087] In an alternate embodiment, the catch mechanism is a flexible fabric with small integrated hook-and-loop elements, such as Velcro™, used to attach the trigger 108 to a part of the SLCD 110 that is stable relative to the trigger movement path.

[0088] A latching, clamping, or threaded element could be located along a single side, more than one side, along a stem region, in multiple areas, or having multiple engagement features and locations.

[0089] Figs. 2G-2I show an eccentric bar-clamp catch mechanism. In one embodiment, the latching operation is performed by the use of a camming apparatus or shearing plate. In this embodiment, the spring-loaded cams movement pulls the trigger 108 toward the expanded position which causes the shearing plate 211 with a release lever 102 to catch on the stem 107. This, in turn, causes the shear plate 211 to rotate and cam into the stem 107 thereby preventing the trigger 108 moving further toward the expanded position. By moving the trigger 108 down, the camming would be relieved, or by rotating the shear plate 211 away from the engagement position. Holding the shearing plate in the disengaged position, the trigger 108 would be free to travel along its movement.

[0090] As shown in Figs. 2E-2F, an embodiment uses a catchment method with an aligned pin 209 and pin hole 210 retention. In this embodiment, one or more pins 209 retains the cams in the retracted position by inserting one or more pins 209 through properly located and sized pin holes 210 in the cam lobes 117 of the cam head 113. When the cams are rotated to the retracted position, pin holes 210 align to a pin along the axis of the pin 209. The pin 209 is inserted into the pin holes preventing further rotation of the cams about the axle. In some embodiments the pins are spring-loaded such that force is applied to them axially to provide movement away from the stem and cause the pins to insert in to the pin holes when the pin holes are aligned to the pin. This alignment would be positioned to occur when the SLCD is in the retracted position. Tapering or beveling on the cam lobes 117 near the pin hole 210 could be used to aid in guiding the pin into the pin hole.

[0091] As shown in Figs. 2E-2F, an embodiment using the pin 209 and pin hole 210 retention, a release method for the catchment uses a tubular member 208 over the stem. The pins 209 are connected to the tubular member via flexible members. When the tubular member is rotated, the flexible connection between the pins and tubular member spools or coils around the tubular member thereby retracting the pins 209 from the pin holes 210. Once the pins 209 are removed from the pin holes 210, the cams are released to rotate to their expanded position. While two pins are described in this embodiment, a single pin or numerous pins could be employed. While the action of the pins described in this embodiment is perpendicular to the stem, axial movement may be used with a release mechanism sliding along the stem for activation. Pins could likewise be used to directly impede axle rotation.

[0092] In one embodiment using pin 209 and pin hole 210 retention, a release method for the catchment uses a trigger or lever mechanism by connecting the pins 209 to the trigger 108 via a flexible member or members. A redirectional feature rigidly mounted to the cam head, axle, stem, or other nonmoving element of the SLCD translates the vertical motion of the trigger 108 and flexible member(s) to horizontal motion to extract and/or insert the pins 209.

[0093] Flexible, lanyard-based embodiments are shown in Figs. 2J-2N. A strap hook 212 is shown on the lanyard or strap 112 looped through the gear loop 111. The strap hook 212 is shown hooked to the trigger 108 in Figs. 2K and 2L.

[0094] Figs. 2M and 2N show a split lanyard strap 213 as a trigger retention device. To release the split lanyard strap 213, with one hand - or even a single finger, the user could remove one side of the strap from the position looped around one side of the trigger 108. On a typical SLCD there is sufficient play, or looseness, in the trigger 108 mechanism such that the trigger can tilt or angle at least 10-30 degrees from its horizontal position. Thus, when one side is released, the trigger will tilt sufficiently that the strap can slide off and complete the release of the trigger 108. In other embodiments, the shape and surface of the split lanyard strap 213 and/or trigger 108 can be modified to increase or decrease the friction between the strap and trigger to the achieve the desired release responsiveness. For example, the friction could be increased by using rubber, notches, or abrasive textures. The friction could be reduced, for example, by using non-stick coatings and smooth surfaces.

[0095] One feature of the strap or lanyard-style embodiments shown in Figs. 2J-2N is that the control mechanism can be made out of lightweight, inexpensive, flexible material. In some embodiments, the size can be adjusted by incorporating hook-and-loop fabric fasteners, such as Velcro™.

[0096] Example 3: Dual stem SLCD trigger retention attachment

[0097] With reference to Figs. 3A-3E, embodiments of a dual stem SLCD trigger retention attachment 300 are described. In one embodiment, a trigger retention attachment 300 for a dual-stem SLCD 310 uses a catch and hook capture mechanism. A trigger retention attachment control mechanism 300 has a trigger-bar sleeve 305, with a trigger wire notch 301, that aligns with and snaps over the trigger bar 308 of the dual stem SLCD 310.

[0098] This double-stem control mechanism contains a catch hook 301 which is shaped so to hook over the gear-loop spacer bar 306. When the trigger bar 308 is pulled distally toward the gear-loop spacer bar 306, from the position shown in Figs. 3A to the position shown in Fig. 3E, the cam heads 113 rotate from the expanded position to the retracted position. The dual stem SLCD trigger retention attachment 300 collides with the gear-loop spacer bar 306. The position and alignment of the dual stem SLCD trigger retention attachment 300 causes the resulting force to move the trigger retention attachment 300 to revolve about the trigger 308, to the position shown in Fig. 3E, out of the way of the gear-loop spacer bar 306. As the trigger bar 308 is pulled further, further retracting the cam lobes 117, the trigger retention attachment control mechanism 300 catch hook 301 passes or aligns with the gear-loop spacer bar 306. The user then rotates the control mechanism 300 so that the catch hook 301 engages the gear-loop spacer bar 306 as shown in Figs. 3C and 3D. The catch hook 301 is shaped such that when the trigger 308 is afterward released, the hook 301 prevents the trigger 308 from returning to the expanded position.

[0099] When the user determines to place the SLCD 310 as an anchor in a rock feature, the release lever 302 is pressed to release the trigger bar 308 and expand the cam head 113 of the SLCD 310. When the release lever 302 is rotated away from the stem, the catch hook 301 moves out from under the gear-loop spacer bar 306 allowing the trigger bar 308 to return to the expanded position shown in Fig. 3A. Movement of the release lever 302 pivots the body 304 of the control mechanism 300 about the trigger bar 308 at the trigger bar sleeve 305.

[00100] The embodiment shown in Figs. 3A-3E provides: a responsive and quick release of the trigger bar 308, a haptic response to the user via a sudden or abrupt vibration through the control mechanism 300 and SLCD 310, as well as a culminating audible notification or snap from the SLCD's suddenly released action and cam lobes 117 collision with the end of the allowed travel and expansion range.

[00101] In an alternate embodiment, the releasable catch hook 301 and sleeve 305 are reversed so that the control mechanism 300 is releasable, not semi-permanently, attached to the trigger bar 308. The double-stem control mechanism 300 is mounted directly onto the gear loop 111 or to the gear-loop spacer bar 308, or to any other structure of the SLCD and has an appropriate catchment for the trigger 308 rather than a catchment for the gear-loop spacer bar 306. This type of attachment is illustrated, for example, in Figs. 4A-4B.

[00102] In alternate embodiments, the control mechanism 300 has a catchment for a structure, of the SLCD 310, other than the gear-loop spacer bar such as the gear-loop itself, or the cam head, axle, or a separate feature integrated in or attached to the stem(s). The catchment could also be formed within the gear-loop spacer bar 306 with an appropriately shaped and placed catch added onto or built into the trigger bar 308.

[00103] Another variation for his type of control mechanism engages on opposite sides of the catchment geometry, with the device mounted on the spacer bar 306 catching the trigger bar 308. For example, the lanyard or split-strap mechanism shown in Figs. 2M-2N, could be adapted to catch both ends of the trigger bar 308 of the dual-stem SLCD 310. In another embodiment, a control mechanism is attached to the trigger cable assembly or a component thereof, rather than the trigger itself.

[00104] Variations, as shown and described for the single stem apparatus, are also applicable to the dual-stem SLCD.

[00105] Example 4: Dual stem SLCD integrated trigger retention

[00106] Figs. 4A and 4B show a lanyard-mounted or strap-hook 212 catchment. Fig. 4C shows a pinch-release catchment 309 mechanism.

[00107] As shown in Figs. 4A-4B, a trigger bar 308 control mechanism 300 for a double- stem SLCD 310 is integrated into the SLCD and uses a hook capture mechanism. The control element has a catchment or hook 212 to engage and retain the trigger bar 308 relative to another a structure of the SLCD, such as the gear loop spacer bar 306 or gear loop 111. As shown in Fig. 4C, the catchment may be formed within the gear-loop spacer bar 306 with an appropriately shaped and placed catchment 309 added onto or built into the trigger bar 308.

[00108] Example 5: Features and variations

[00109] A number of features and variation can be used with the described methods of maintaining a SLCD in a fully, or nearly fully, retracted position and, thereafter, allowing the SLCD to return to its conventional function.

[00110] Positioning and maintaining the cam lobes in a retracted position during a climb provides the added benefit of easier transport. On a typical ascent, a climber may carry more than a dozen SLCDs on a belt or otherwise attached to their body. Fully expanded SLCDs take up more space and the points of the cam lobes swing into the climber's body. In the retracted position, the curves of the cam lobes swing into the climber, reducing the risk of bruising. In the retracted position, the SLCD takes up less space, reducing the risk of gear entanglement.

[00111] The device can be configured to provide a manual catch mechanism. Using features described, appropriate geometry, and methods known in the art, the device can be enabled by various types of user manipulation.

[00112] The device can be configured to provide an automatic or semi-automated catch mechanism. Using features described, appropriate geometry, and methods known in the art, the device can be enabled automatically such that when the cam head is retracted to a desired position, the control mechanism engages without further input. The positioning may be either by direct manipulation of the cam lobes or by the manipulation of the trigger. Additionally, the device can be disabled automatically such that when the cam head is retracted to a desired position, the control mechanism disenengages without further input. In another embodiment, when a user pulls the trigger mechanism to a desired position, the mechanism is engaged by a physical movement of another component or feature.

[00113] The control mechanism can be integrated into the design of the SLCD to be included as part of the finished product. The mechanism can be added into existing structures of the SLCD or function through additional structures. The control mechanism can be a separate component which can be added to a SLCD to provide the additional functionality, or removed from a SLCD, as desired, to return the SLCD to the previous functionality.

[00114] In some embodiments the control mechanism is attached by adhesive to the SLCD, by lanyard (flexible member), by lashing, by clip, by appropriate geometry to snap over an existing SLCD structure, or by clamping onto the existing SLCD structure, or combination of these. The attachment methodology may employ single or multiple components.

[00115] In one embodiment the mechanisms of different sizes, or for use with particular SLCDs, are provided in different colors.

[00116] As shown in Figs. 5A-H, embodiments of the control mechanism emit light to allow the user to more readily find or identify their SLCD in low-light conditions. It may glow-in-the-dark by use of or by including a component made of a phosphorescent or photo- luminescent polymer or made with photo-luminescent additives in the construction, such as strontium-aluminate or zinc-sulfide compounds. Luminescent coatings could also be used on surfaces. Chemiluminescence could also be employed. In one embodiment the on-board light source is used in conjunction with the photo-luminescent polymer.

[00117] Referring to Figs. 5A-5H, the device may be constructed with an on-board energy source such as a battery or capacitor, switching element and a solid-state light source, including: LED, PLED, or OLED. A piezoelectric component may be employed to generate power for the light. Additionally, a photovoltaic cell (solar panel) may be employed for generating the power required for the light source. Shown are: a light activation button 501, a battery 502, printed circuit board or flex-circuit 503, light emitting diode (LED) or other light source 504, stress transducer 505, contact pads 506, internal cable 507, piezoelectric transducer 508, and piezoelectric cable 509.

[00118] Embodiments having an on-board light source may utilize a time circuit to allow the light to turn on for a set amount of time, at a particular time, or flash periodically when triggered. One application for this embodiment, for use in caves or confined spaces, may indicate a set amount of time corresponding to the calculated duration of an oxygen supply. Additional embodiments can include strategically polished or textured areas to function, with the light source 504, as a light-pipe for controlled light reflection or emission. Embodiments of the invention can include reflective foils, polishes, coatings, or paints.

[00119] In one embodiment, there is an on-board light source 504 with a stress transducer 505 for the switching mechanism. This embodiment turns on the light when the transducer is stressed which occurs when the mechanism is engaged, holding the SLCD retracted. In another embodiment, the light comes on when the transducer is unstressed, when the mechanism is disengaged. Additionally, the stress transducer 505 or contact pads 506 may be employed as an interlock to keep the light from inadvertently being turned on unless the mechanism is attached, engaged, or disengaged.

[00120] In one embodiment, the device has a piezoelectric transducer 508 using a flexible member of the mechanism to generate force on the transducer. The flexible member is designed to place a transient force on the transducer 508 when the catchment mechanism 301 is either engaged or disengaged.

[00121] As shown in Fig. 51, embodiments may provide individual identification of the SLCD by provisioning a unique or substantially unique marking or identification tag for identification or location of an SLCD or climbing apparatus. Identification may be within the mechanism or a user-added component. Shown is an identification area 510 which can be etched or debossed for personalization and identification. The area 510 can include a semi- soft material, such as a polymer, for etching, molding, or scratching in a signature, name, or identifying symbol, mark, or code. The area 510 can be ink absorbing or chemosensitive. The area 510 can be debossed for adhering identification such as a radio frequency id (RFID), label, sticker, or plaque. The use of a miniature radio-frequency identification (rfid) chip within or attached to the mechanism provides identification and aids in location or tracking.

[00122] It is desirable to protect the ID area 510 from damage during regular use. Placing the ID area on a surface of the control mechanism which is protected from moving parts and environmental damage is advantageous. A debossed region can provide added protection from glancing blows and abrasion.

[00123] Example 6: Alternate embodiments

[00124] General Material Construction

[00125] Construction material selection depends on the embodiment chosen. For a built-in trigger retention element it may be desirable to use the same materials used in the SLCD. The design and structure is selected to accommodate the material characteristics. It may be advantageous in some instances to select materials for the trigger retention element that differ from those used in the SLCD. For an add-on control mechanism, the material(s) should be chosen to accommodate the needs of the design. A snap-on style mechanism, for example, would need a material which can flex sufficiently, such as an elastomer, semi-elastic metal, or a composite, to accommodate the distortion needed to mount the control mechanism over the SLCD, yet stiff and rigid enough to return to its original shape after flexing and function as desired. A clamp-on control mechanism would be formed with material which is rigid enough to prevent the clamp from deforming such that it does not properly align or maintain position, relative to the SLCD, yet flexible, if needed, for the trigger engagement functionality or flexion of the stem during use.

[00126] The use of control mechanism color and configuration can aid SLCD placement. For example, a SLCD placed in a horizontal crack is more safely positioned if the outer or outboard cam lobes are against the lower surface. Thus, the release lever may be placed to identify, by touch, which way a SLCD is oriented so that a climber can place the SLCD with the outboard cam lobes on the bottom. The color of the control mechanism can be selected to distinguish SLCD size or expansion range. A quick glance at the color can identify the appropriately sized SLCD.

[00127] As SLCDs may be used in a broad range of environments, the ideal construction material(s) are inert and impervious to snow, rain, cold, heat, salt, ultraviolet radiation, abrasion, humidity, and dryness. If, for example, an elastomer is chosen, it is preferably UV stabilized to resist deterioration when used in sunlight.

[00128] As SLCDs are created to provide protection during mountain climbing and rock climbing and for the construction of temporary anchors in stone features, often in remote areas, minimizing the weight is highly desirable to the user. Consequently, as there are numerous materials which would satisfy the basic functions of the control mechanism, such as stainless steel, trade-offs may be considered when selecting the construction materials.

[00129] The control mechanism may be formed by a single piece of a single material, such as injection molded plastic. The control mechanism may also be formed by multiple materials or components. Material combinations and construction configurations are used to create desired qualities, such as localized flexibility or stiffness. Various methods and materials described or known in the art can be used to obtain the desired characteristics.

[00130] While the present invention has been described in terms of particular

embodiments, it will be appreciated by one of ordinary skill that the spirit and scope of the invention is not limited to those embodiments, but extend to the various modifications and equivalents as defined in the appended claims.

Claims

CLAIMS What is claimed is:

1. A control mechanism for use with a spring loaded camming device (SLCD), the SLCD having a trigger adapted to cause rotation of a plurality of cam lobes of the SLCD to move between an expanded position and a retracted position, the control mechanism comprising: a trigger catchment carried by the SLCD and adapted to releasably retain the trigger of the SLCD in a first position, wherein the cam lobes of the SLCD are in the retracted position; and

a trigger release lever, which is operative to release the trigger from the trigger catchment such that cam lobes move towards a second position, wherein the cam lobes of the SLCD are in the expanded position.

2. A trigger retention control mechanism for use with a flexible stem spring loaded camming device (SLCD); wherein the SLCD comprises a plurality of opposing cam lobes coupled to at least two axles, a trigger coupled to the opposing cam lobes, wherein the trigger is adapted to cause rotation of a plurality of cam lobes of the SLCD to move between an expanded position and a retracted position, and a stem between the cam lobes and a safety attachment point; the trigger retention apparatus comprising:

a stem sleeve substantially encircling a portion of the stem; and

a trigger catchment integrated into the stem sleeve and adapted to releasably catch the trigger.

3. A control mechanism, adapted for use in maintaining the cam lobes of a spring -loaded camming device (SLCD) in a retracted position until such time as a user desires to release the SLCD from the retracted position, comprising:

a catchment, wherein the catchment is adapted to maintain the cam lobes of the SLCD in a retracted position by engaging a first structure of the SLCD with a second structure of the SLCD, wherein the first structure is selected from the group consisting of: a gear-loop spacer bar, a gear-loop, and a stem; and wherein the second structure is selected from a trigger, a cam lobe, a cable, and an axle; and

a release lever adapted to receive input from the user, wherein the input from the user causes the catchment to release the first structure from the second structure, thereby permitting movement of the cam lobes from the retracted position towards an expanded position.

4. A trigger retention control mechanism for use with a spring loaded camming device (SLCD); wherein the SLCD comprises a plurality of opposing cam lobes coupled to at least two axles, a trigger bar coupled to the opposing cam lobes, and two stems between the cam lobes and a safety attachment point having a gear-loop spacer bar attached to both stems; the trigger retention control mechanism comprising:

a trigger bar clip; and

a bar catchment, wherein the bar catchment is adapted to catch the gear-loop spacer bar, and wherein the bar catchment is a part of a unit with a fixed distance from the trigger bar clip, and wherein cams are held in a retracted position when the trigger bar clip is engaged with the trigger bar and when the bar catchment is engaged with the gear-spacer bar.

5. The control mechanism of any one of the claims herein, wherein the control mechanism is formed from a single unit detachable from the SLCD.

6. The control mechanism of any one of the claims herein, wherein the control mechanism is secured to the SLCD by a method chosen from the group consisting of: snap-on, clamp, adhesive, lanyard, and lashing.

7. The control mechanism of any one of the claims herein, wherein the control mechanism is irremovably integrated into the SLCD.

8. The control mechanism of any one of the claims herein, wherein the control mechanism has a slip-resistant surface.

9. The control mechanism of any one of the claims herein, wherein the control mechanism releasably couples the trigger to a part of the SLCD selected from the set consisting of: stem, gear loop, axle, lanyard, and spacer bar.

10. A method of using a spring-loaded camming device (SLCD), the method comprising: positioning a plurality of cam lobes on a cam head of a SLCD in a retracted position by retracting a trigger of the SLCD;

engaging a coupling between the trigger and another part of the SLCD, whereby the cam lobes are retained in the retracted position;

positioning the SLCD in a rock feature; and

releasing the coupling.

11. A method of using a spring -loaded camming device (SLCD), the method comprising: positioning a plurality of cam lobes on a cam head of a SLCD in a retracted position by retracting a trigger of the SLCD;

engaging a coupling between the trigger and another part of the SLCD, whereby the cam lobes are retained in the retracted position; and

releasing the coupling using a lever integrated into the coupling.

12. The method of any one of the claims herein, wherein the releasing is performed with one finger.

13. The method of any one of the claims herein, wherein cam lobes of the SLCD are set in a retracted position before initiating an ascent.

14. The method of any one of the claims herein, wherein the coupling is accompanied by a snapping sound.

15. The method of any one of the claims herein, wherein the coupling is accompanied by a haptic feedback vibration.

16. The method of any one of the claims herein, wherein the retracted position of the cam lobes is a position of the cam lobes with less than 40% of active cam range remaining.