Abstract: Gear oils and gear oil additive concentrates of enhanced positraction performance are described. They comprise: (i) at least one oil-soluble sulfur-containing extreme pressure or antiwear agent; (ii) at least one oil-soluble amine salt of a partial ester of an acid of phosphorus; and (iii) at least one oil-soluble succinimide of the formula ##STR1## where R.sub.1 is an alkyl or alkenyl group having an average of 8 to 50 carbon atoms, and each of R.sub.2, R.sub.3 and R.sub.4 is a hydrogen atom or an alkyl or alkenyl group having an average of up to about 4 carbon atoms. These compositions preferably contain one, more preferably two, and most preferably all three of the following additional components: (iv) at least one amine salt of a carboxylic acid; (v) at least one nitrogen-containing ashless dispersant; and (vi) at least one trihydrocarbyl ester of a pentavalent acid of phosphorus.

Abstract: A wear rod for skis of snowmobiles and similar vehicles, comprising a horizontal base for engaging an underside of a ski and a vertical wear element projecting downwardly from the horizontal base. The base provides firm support for the wear element and good protection for the ski against bending, whereas the wear element provides good penetration into the snow and good steering control. By making the wear element shorter than the base in the longitudinal direction of the ski, the ratio of the length of the wear element in front of the pivoting point of the ski to the ratio of the length behind this point can be varied to provide favorable steering control characteristics without affecting the support for the ski.

Abstract: A method of adapting tongs having a pair of pivotally connected arms for use with a disposable bag. The method involves the following described steps. Firstly, place a pair of opposed compressible contact members on an interior surface of the arms adjacent the pivotal connection. The contact members engage when the arms are partially closed and compress thereby permitting the arms to become fully closed. Secondly, place a bottom portion of a disposable bag between the opposed compressible contact members. Thirdly, partially close the tongs such that the contact members engage to tightly grip the bottom portion of the disposable bag. Fourthly, fold a peripheral edge of the disposable bag over tips of the arms. The disposable bag opens and closes with the manipulation of the arms.

Abstract: Gear oil additive concentrates and lubricant compositions containing a combination of additives which minimize noise and vibration that occasionally develop in limited slip axles. The additive combinations include (i) an oil-soluble succinimide of the formula ##STR1## wherein R.sub.1 is alkyl or alkenyl having 8 to 50 carbon atoms, and R.sub.2, R.sub.3 and R.sub.4 are hydrogen atoms or alkyl or alkenyl groups having up to about 4 carbon atoms; and (ii) a boronated or non-boronated carboxylic derivative composition produced by reacting a substituted succinic acylating agent with (a) amine having at least one primary or secondary amino group in the molecule, or (b) at least one alcohol, or (c) a combination of (a) and (b). The substituent of the succinic acylating agent is derived from polyalkene having a number average molecular weight of about 500 to about 100,000. The additive concentrates and lubricant compositions are devoid of any metal-containing component.

Abstract: Gear oil additive concentrates and lubricant compositions containing a combination of additives which minimize noise and vibration that occasionally develop in limited slip axles. The additive combinations include (i) an oil-soluble succinimide of the formula ##STR1## wherein R.sub.1 is alkyl or alkenyl having 8 to 50 carbon atoms, and R.sub.2, R.sub.3 and R.sub.4 are hydrogen atoms or alkyl or alkenyl groups having up to about 4 carbon atoms; and (ii) a boronated or non-boronated carboxylic derivative composition produced by reacting a substituted succinic acylating agent with (a) amine having at least one primary or secondary amino group in the molecule, or (b) at least one alcohol, or (c) a combination of (a) and (b). The substituent of the succinic acylating agent is derived from polyalkene having a number average molecular weight of about 500 to about 100,000. The additive concentrates and lubricant compositions are devoidd of any metal-containing component.

Abstract: Steering skis for snowmobiles and similar vehicles. The ski has a lower surface for contacting the snow and at least one upwardly curved lateral edge in a region of the ski used for support of the vehicle. The curved lateral edge defines a convex curved snow-engaging surface which merges smoothly with the lower surface of the ski. The curved edge generates lift during turning of the ski while minimizing drag characteristics of the ski. The ski is less likely to result in tipping during turns at high speed in deep snow, which improves the safety of the vehicle. The curved edge produces minimal drag while turning and this allows for more use of the lift generated by the ski.

Abstract: 1.