Petzl Am'D Ball Lock (plastic sleeve v1)

Am'D Ball Lock (plastic sleeve v1)

Name:Petzl Am'D (plastic sleeve v1)
Sub Item:Ball Lock
Category:triple-action twist lock
Locking Type:full-auto
Unlock Style:press-and-twist
Sleeve Rotation:45° (unlocked) | 45° (maximum)
Shape:asymmetric D
Nose Guard:none
Gate Shield:relieved: blocked
Weight:75.0 g
Dimensions:Length: 110.42 mm
Width: 63.10 mm
Depth (basket end): 10.0 mm
Gate Opening: 23.5 mm
Strength Ratings:Major Axis: 28 kN | Minor Axis: 7 kN | Gate Open: 8 kN
Other Markings:Forged: PETZL Am'D Ball Lock Pat. | (ratings) Ⓚ (ce-logo) 0197
Stamped: 97037B [doubled]
Injection Molded (recessed): (Petzl oval logo) (fingerprint texture) BALL LOCK PATENTED (fingerprint texture)
Batch Marking Location:spine-left
Collection Criteria:★ Mechanically Interesting
Summary:plastic sleeve button-lock
Description & Commentary:

Introduced in 1997, the Ball lock was Petzl's first triple action auto locking mechanism (predating the Triact), which operates quickly with a button press and 45 degree twist. The plastic sleeve has finger grooves with a molded fingerprint texture. The button protrudes significantly more than the metal sleeved version and I find it more difficult to depress fully.

Petzl's similar manual locking Spinball was introduced later and uses a 135 deg twist.

Differences from #1940: Ball Lock and UIAA k-circle forged onto the spine, and not on the plastic sleeve. Batch marking is on the spine-left rather than spine-exterior. These differences suggest earlier production than 1940.

Relevant Patent:US5608953