Following a lull in the opening days of this month, last week was a strong one for dividend raises. By my count, no fewer than 13 publicly traded companies hiked their distributions. There were more than a few heavy hitters among that group. Here's a look at a trio of them.

The biggest rise out of our three selections is sturdy engineering company Cummins (NYSE:CMI), which hiked its payout by nearly 25% to $0.78 per share. The firm also refreshed its $1 billion stock repurchase program, which will renew at the same amount once the current initiative expires.

It has plenty of reason to be optimistic. Its most recently reported quarter was a good one, with revenue climbing 12% to $4.4 billion year over year and attributable net profit improving 20% to $338 million. 

Still better, Cummins is predicting that sales, at least, will continue to move north. The company is forecasting annual growth of 6% to 10% for the entirety of fiscal 2014. 

Meanwhile, at the end of said quarter, it had just over $2.3 billion in cash and short-term investments -- more than enough to pay the roughly $143 million bill for that fattened dividend and a good chunk of those share buybacks.

Cummins' new distribution will be paid on Sept. 2 to shareholders of record as of August 22. It equates to a yield of just over 2% at the current stock price.

Saying that "a compelling dividend remains a top priority for our company," oil multinational ConocoPhillips (NYSE:COP) has backed up its words with a 6% lift in its payout to $0.73 per share.

This is the firm's second increase in as many years, following the spinoff of its downstream operations into a separate, publicly traded company in May 2012. 

Since then, the latter firm has more than doubled its dividend, from a debut payout of $0.20 per share to the upcoming $0.50. ConocoPhillips buy-and-holders, then, have made out pretty well in the recent past.

The mother company is a massive enterprise, and as you'd expect ConocoPhillips has a lot of cash and equivalents on hand. $7.7 billion of the stuff, to be exact, as of the end of its Q1. The upcoming dividend payout, meanwhile, will total a shade less than $900 million quarterly. As such, we can expect the ConocoPhillips dividend well to keep pumping out for shareholders.

The firm will hand out its increased distribution on September 2 to holders of record as of July 21. At the moment, said distribution yields 3.4% at ConocoPhillips' current share price.

Enterprise Products Partners
In terms of dividend raising frequency, the above two companies have nothing on Enterprise Products Partners (NYSE:EPD). The midstream energy partnership last week pulled the trigger on its 40th increase in a row.

The partnership manages to keep this up through incremental hikes of $0.01 per unit or so every quarter. This is the amount of the latest increase, with Enterprise now on the hook for $0.72 per unit. 

The partnership is managing to improve its financials more than many expected. Enterprise's Q1 net trounced analyst estimates, rising 6% on a year-over-year basis to hit almost $800 million for an EPS of $0.85 per unit, against the average expectation of $0.75. Revenue advanced more energetically, growing by 13% to $12.9 billion. 

Topping both line items in terms of growth was perhaps the most important one of all for the partnership's income-loving unit holders -- distributable cash flow. This rose by 19% to $1.07 billion. So Enterprise should have no problem covering a dividend hike that's barely over 1%. And considering the way its fundamentals are improving, we can probably count on that payout continuing its steady rise.

Enterprise's upcoming distribution will be paid on Aug. 7 to unit holders of record as of July 31. That $0.72 per share yields 3.7%.

Eric Volkman has no position in any stocks mentioned. The Motley Fool recommends Cummins and Enterprise Products Partners, and owns shares of Cummins. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.